The Global Volcanism Program database currently contains 1580 volcano names (1540 Holocene and 40 Pleistocene with thermal activity) (bolded), 1985 synonyms, and 9156 subfeatures, for an overall total of 12721 names, sorted below in alphabetical order. Descriptions of the various "Volcano Type" and "Volcano Status" designations can be found on the Volcano Data Criteria page.
| Volcano Name | Volcano Type | Volcano Status | Volcanic Subregion |
| AABIDA | Synonym of ADWA | Africa (northeastern) & Red Sea | |
| AB E GARM | Thermal Feature of DAMAVAND | Iran & Afghanistan | |
| ABANG, GUNUNG | Stratovolcano of BATUR | Lesser Sunda Islands | |
| ABARO | Cone of CORBETTI CALDERA | Africa (northeastern) & Red Sea | |
| ABAS TEPE | Cone of ERCIYES DAGI | Turkey | |
| ABBOTT PEAK | Cone of EREBUS | Antarctica & South Sandwich Islands | |
| ABEJERA, MONTANA | Dome of TENERIFE | Canary Islands | |
| ABEQUE, MONTANA DE | Cinder cone of TENERIFE | Canary Islands | |
| ABIDA | Synonym of ADWA | Africa (northeastern) & Red Sea | |
| ABILI AGITUK [WARGESS] | Tuff cone of BARRIER, THE | Africa (eastern) | |
| ABINGDON | Synonym of PINTA | Galápagos Islands | |
| ABOA | Synonym of AOBA | Vanuatu | |
| ABOUR, JEBEL EL | Cone of BAYUDA VOLCANIC FIELD | Africa (northern) | |
| ABRA, CERRO EL | Synonym of ATLIXCOS, LOS | México | |
| ABRIGO, CERRO DEL | Dome of VALLES CALDERA | USA (New Mexico) | |
| ABRUNCO | Dome of TENERIFE | Canary Islands | |
| ABU | Shield volcanoes | Thermoluminescence | Honshu |
| ABU AIL ISLAND | Cone of ZUKUR | Africa (northeastern) & Red Sea | |
| ABU HARIS, JABAL | Dome of KISHB, HARRAT | Arabia | |
| ABYAD, JABAL | Dome of KHAYBAR, HARRAT | Arabia | |
| ACADEMII NAUK | Synonym of AKADEMIA NAUK | Kamchatka Peninsula | |
| ACAMARACHI | Stratovolcano | Holocene | Northern Chile, Bolivia & Argentina |
| ACATENANGO | Stratovolcano | Historical | Guatemala |
| ACATLAN, CERRO | Cinder cone of NAOLINCO VOLCANIC FIELD | México | |
| ACCADEMIA | Dome of CAMPI FLEGREI | Italy | |
| ACHACARA, LOMA | Cinder cone of ANDAHUA-ORCOPAMPA | Perú | |
| ACHELONE | Vent of NISYROS | Greece | |
| ACHEOLUS | Vent of NISYROS | Greece | |
| ACHI-YAMA | Dome of NII-JIMA | Izu, Volcano, & Mariana Islands | |
| ACHIN-NIELLU | Cone of HUANQUIHUE GROUP | Central Chile & Argentina | |
| ACHIN-NIELLU | Cone of HUANQUIHUE GROUP | Central Chile & Argentina | |
| ACHIOTILLAL | Stratovolcano of BARVA | Costa Rica | |
| ACHLAN | Synonym of ICHINSKY | Kamchatka Peninsula | |
| ACIGOL | Crater of KARAPINAR FIELD | Turkey | |
| ACIGOL-NEVSEHIR | Caldera | Anthropology | Turkey |
| ACIGOL-NEYSEHIR | Synonym of ACIGOL-NEVSEHIR | Turkey | |
| ACOUMA, MORNE | Dome of PLAT PAYS, MORNE | West Indies | |
| ACQUARIUM | Thermal Feature of EAST DIAMANTE | Izu, Volcano, & Mariana Islands | |
| ACQUE CALDE | Thermal Feature of VULCANO | Italy | |
| ACROPOLI | Cone of PANTELLERIA | Italy | |
| ACTIVE CRATER | Crater of RINCON DE LA VIEJA | Costa Rica | |
| ADAGDAK | Stratovolcano | Pleistocene-Hot Springs | Aleutian Islands |
| ADAMS | Stratovolcano | Tephrochronology | USA (Washington) |
| ADAMS SEAMOUNT | Submarine volcano | Potassium-Argon | Pacific Ocean (central) |
| ADAS TEPE [ABAS TEPE] | Cone of ERCIYES DAGI | Turkey | |
| ADATARA | Stratovolcanoes | Historical | Honshu |
| ADATARA-YAMA | Dome of ADATARA | Honshu | |
| ADHAMAS | Thermal Feature of MILOS | Greece | |
| ADIKA-WILIS | Synonym of WILIS | Java | |
| ADO ALE | Synonym of ASSAB VOLCANIC FIELD | Africa (northeastern) & Red Sea | |
| ADO WADJUNG [ADO WAJUNG] | Crater of ILIWERUNG | Lesser Sunda Islands | |
| ADO WAJUNG | Crater of ILIWERUNG | Lesser Sunda Islands | |
| ADWA | Stratovolcano | Holocene | Africa (northeastern) & Red Sea |
| AEK MADURANA | Thermal Feature of SIBUALBUALI | Sumatra | |
| AEK WALIRAN | Thermal Feature of SIBUALBUALI | Sumatra | |
| AER PANAS | Thermal Feature of KEMBAR | Sumatra | |
| AESEPUT | Cone of SOPUTAN | Sulawesi | |
| AESEPUT WERO | Dome of SOPUTAN | Sulawesi | |
| AETNA | Synonym of ETNA | Italy | |
| AFANA | Crater of WALLIS ISLANDS | Samoan & Wallis Islands | |
| AFATE, CERRO | Dome of COATEPEQUE CALDERA | El Salvador & Honduras | |
| AFDERA | Stratovolcano | Holocene? | Africa (northeastern) & Red Sea |
| AFLITOS | Cone of PICOS VOLCANIC SYSTEM | Azores | |
| AFOLAU | Cone of UPOLU | Samoan & Wallis Islands | |
| AFONO | Dome of TUTUILA | Samoan & Wallis Islands | |
| AFOSA, MONTANA DE | Cinder cone of HIERRO | Canary Islands | |
| AFRERA | Synonym of AFDERA | Africa (northeastern) & Red Sea | |
| AFUTINA | Cone of SAVAI'I | Samoan & Wallis Islands | |
| AGAJEDAN | Synonym of SHISHALDIN | Aleutian Islands | |
| AGASCHAGOCH | Synonym of BOGOSLOF | Aleutian Islands | |
| AGELU | Synonym of AYELU | Africa (northeastern) & Red Sea | |
| AGHIE [PECHAN] | Cone of TIANSHAN VOLCANIC GROUP | China (western) | |
| AGINCOURT | Synonym of PENGCHIAHSU | Taiwan | |
| AGIOS JOANNIS | Vent of NISYROS | Greece | |
| AGMAGAN-KARADAG | Synonym of GHEGAM RIDGE | Caucasus, Georgia & Armenia | |
| AGNANO | Caldera of CAMPI FLEGREI | Italy | |
| AGNANO MONTE SPINA | Crater of CAMPI FLEGREI | Italy | |
| AGOENG | Synonym of AGUNG | Lesser Sunda Islands | |
| AGONIA, PUIG S' | Cone of OLOT VOLCANIC FIELD | Western Europe | |
| AGOTU VALLEY | Cone of CRATER MOUNTAIN | New Guinea & D'Entrecasteaux Islands | |
| AGRI DAGI | Synonym of ARARAT | Turkey | |
| AGRIGAN | Stratovolcano | Historical | Izu, Volcano, & Mariana Islands |
| AGRIHAN | Synonym of AGRIGAN | Izu, Volcano, & Mariana Islands | |
| AGRIO, DEL [CAVIAHUE] | Caldera of COPAHUE | Central Chile & Argentina | |
| AGRITAS, VOLCAN LAS | Dome of MASCOTA VOLCANIC FIELD | México | |
| AGUA | Stratovolcano | Holocene | Guatemala |
| AGUA AGRIA | Thermal Feature of AGUAJITO, EL | México | |
| AGUA AGRIA, AUSOLES DE | Thermal Feature of SAN VICENTE | El Salvador & Honduras | |
| AGUA AMARGA, CERRO | Dome of PURICO COMPLEX | Northern Chile, Bolivia & Argentina | |
| AGUA BENDITA, CERRO | Cone of ZITACUARO-VALLE DE BRAVO | México | |
| AGUA CALIENTE | Thermal Feature of CHICHON, EL | México | |
| AGUA CALIENTE DEL TUZGLE | Thermal Feature of TUZGLE, CERRO | Northern Chile, Bolivia & Argentina | |
| AGUA CALIENTE HOT SPRINGS | Thermal Feature of ST. HELENS | USA (Washington) | |
| AGUA DE PAU | Stratovolcano | Historical | Azores |
| AGUA FRIA, LAGUNA DE | Synonym of POAS | Costa Rica | |
| AGUA GRANDE, CERRO | Cinder cone of COMONDU-LA PURISIMA | México | |
| AGUA SHUCA | Thermal Feature of APANECA RANGE | El Salvador & Honduras | |
| AGUA, CERRO | Pyroclastic Cone of NEGRA, SIERRA | Galápagos Islands | |
| AGUA, CERRO DEL | Cinder cone of CHICHINAUTZIN | México | |
| AGUA, LAGUNA DE | Crater of SAN CRISTOBAL | Nicaragua | |
| AGUAJITO, EL | Caldera | Pleistocene-Hot Springs | México |
| AGUALVA | Dome of TERCEIRA | Azores | |
| AGUAS AMARGAS | Thermal Feature of SANTO TOMAS | Guatemala | |
| AGUAS CALIENTES | Stratovolcano of LASCAR | Northern Chile, Bolivia & Argentina | |
| AGUAS PERDIDAS | Synonym of NEGRILLAR, LA | Northern Chile, Bolivia & Argentina | |
| AGUAS TERMALES | Thermal Feature of RINCON DE LA VIEJA | Costa Rica | |
| AGUAS ZARCAS | Cinder cone of PLATANAR | Costa Rica | |
| AGUERO, CERRO DE | Cone of TELICA | Nicaragua | |
| AGUILA, CERRO EL | Stratovolcano of APANECA RANGE | El Salvador & Honduras | |
| AGUILA, CERRO LA | Stratovolcano of MICHOACAN-GUANAJUATO | México | |
| AGUILA, EL [SAN ANTONIO] | Stratovolcano of TACANA | México | |
| AGUILA, PICO DEL | Dome of TOLUCA, NEVADO DE | México | |
| AGUILAS, LAS | Dome of HUMEROS, LOS | México | |
| AGUILAS, VOLCAN LAS | Cone of CHILLAN, NEVADOS DE | Central Chile & Argentina | |
| AGUILERA | Stratovolcano | Radiocarbon | Southern Chile & Argentina |
| AGUILILLAS, CERRO | Cinder cone of COMONDU-LA PURISIMA | México | |
| AGUNG | Crater of GUNTUR | Java | |
| AGUNG | Stratovolcano | Historical | Lesser Sunda Islands |
| AGUROSHI-YAMA | Cone of KURIKOMA | Honshu | |
| AHALAPAM CINDER FIELD | Synonym of NORTH SISTER FIELD | USA (Oregon) | |
| AHDING INGRID MOUNTAIN | Cone of NUNIVAK ISLAND | Alaska (western) | |
| AHKIWIKSNUK | Maar of NUNIVAK ISLAND | Alaska (western) | |
| AHOLO, VOLCAN | Cone of CHICHINAUTZIN | México | |
| AHRUP | Synonym of LONG ISLAND | Northeast of New Guinea | |
| AHUACATLAN, VOLCAN DE | Synonym of CEBORUCO | México | |
| AHUACHAPAN | Synonym of APANECA RANGE | El Salvador & Honduras | |
| AHUATEPEC, CERRO | Cone of SERDAN-ORIENTAL | México | |
| AHUAZATEPETL, VOLCAN | Cinder cone of CHICHINAUTZIN | México | |
| AHUMOA | Cone of MAUNA KEA | Hawaiian Islands | |
| AHYI | Submarine volcano | Seismicity | Izu, Volcano, & Mariana Islands |
| AI-LAAU | Shield volcano of KILAUEA | Hawaiian Islands | |
| AIELU | Synonym of AYELU | Africa (northeastern) & Red Sea | |
| AIGAGIN | Synonym of MAKUSHIN | Aleutian Islands | |
| AIGUANEGRA, VOLCA | Cone of OLOT VOLCANIC FIELD | Western Europe | |
| AIGUILLE NOIRE | Cone of KERGUELEN ISLANDS | Indian Ocean (southern) | |
| AILERON | Dome of PELEE | West Indies | |
| AINO-MINE | Cone of KUSATSU-SHIRANE | Honshu | |
| AINU TUKAP [TUKAP] | Stratovolcano of MEDVEZHIA | Kuril Islands | |
| AIRA | Pleistocene caldera of SAKURA-JIMA | Ryukyu Islands & Kyushu | |
| AIRE, CERRO DEL | Cinder cone of MICHOACAN-GUANAJUATO | México | |
| AISEPOET [AESEPUT] | Cone of SOPUTAN | Sulawesi | |
| AIYANSH VOLCANO | Synonym of TSEAX RIVER CONE | Canada | |
| AIZU-FUJI (AIZU-YAMA) | Synonym of BANDAI | Honshu | |
| AJAGIN (AJAGISCH) | Synonym of MAKUSHIN | Aleutian Islands | |
| AJAKAN [AYAKAN] | Crater of GUNTUR | Java | |
| AJATA, VOLCANES DE | Cinder cone of PARINACOTA | Northern Chile, Bolivia & Argentina | |
| AJEK-AJEK | Caldera of SEMERU | Java | |
| AJEL | Synonym of AYELU | Africa (northeastern) & Red Sea | |
| AJELOU | Synonym of AYELU | Africa (northeastern) & Red Sea | |
| AJER PANAS [AYER PANAS] | Thermal Feature of LUMUT BALAI, BUKIT | Sumatra | |
| AJUSCO, VOLCAN | Dome of CHICHINAUTZIN | México | |
| AKA-DAKE | Stratovolcano of DAISETSU | Hokkaido | |
| AKA-DAKE | Synonym of SINARKA | Kuril Islands | |
| AKA-JIMA | Cone of FUKUE-JIMA | Ryukyu Islands & Kyushu | |
| AKADEMIA NAUK | Stratovolcanoes | Historical | Kamchatka Peninsula |
| AKADEMIA NAUK | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| AKADEMIA NAUK SPRINGS | Thermal Feature of AKADEMIA NAUK | Kamchatka Peninsula | |
| AKAGI | Stratovolcano | Holocene? | Honshu |
| AKAHANI-YAMA | Stratovolcano of BANDAI | Honshu | |
| AKAI | Cinder cone of ASO | Ryukyu Islands & Kyushu | |
| AKAKUBO | Cone of IZU-TOBU | Honshu | |
| AKAKURA | Thermal Feature of MYOKO | Honshu | |
| AKAKURA-DAKE | Cone of HAKKODA GROUP | Honshu | |
| AKAMIZU | Thermal Feature of ASO | Ryukyu Islands & Kyushu | |
| AKAN | Caldera | Historical | Hokkaido |
| AKAN-FUJI | Stratovolcano of AKAN | Hokkaido | |
| AKAN-HUZI [AKAN-FUJI] | Stratovolcano of AKAN | Hokkaido | |
| AKAN-KOHAN | Thermal Feature of AKAN | Hokkaido | |
| AKANAGURE | Dome of HIUCHI | Honshu | |
| AKANDANA-YAMA | Stratovolcano of YAKE-DAKE | Honshu | |
| AKASAKA-MINAMI | Cone of IZU-TOBU | Honshu | |
| AKATSUKA | Cone of FUJI | Honshu | |
| AKAZAKI-NO-MINE | Dome of NII-JIMA | Izu, Volcano, & Mariana Islands | |
| AKAZAWA-KAIKYU | Submarine vent of IZU-TOBU | Honshu | |
| AKERLUNDH | Cone of SEAL NUNATAKS GROUP | Antarctica & South Sandwich Islands | |
| AKHAT | Cone of DARIGANGA VOLCANIC FIELD | Mongolia | |
| AKHLAN | Synonym of ICHINSKY | Kamchatka Peninsula | |
| AKHOMTEN | Cone of MUTNOVSKY | Kamchatka Peninsula | |
| AKHTANG | Shield volcano | Holocene? | Kamchatka Peninsula |
| AKHUACHAPAN [PLAYON DE AHUACHAPAN] | Thermal Feature of APANECA RANGE | El Salvador & Honduras | |
| AKI [MENSHOI BRAT] | Dome of MEDVEZHIA | Kuril Islands | |
| AKILOSET SPRINGS | Thermal Feature of SILALI | Africa (eastern) | |
| AKIMOANA | Submarine vent of MAUNA LOA | Hawaiian Islands | |
| AKITA-FUJI | Synonym of CHOKAI | Honshu | |
| AKITA-KOMAGA-TAKE | Stratovolcanoes | Historical | Honshu |
| AKITA-YAKE-YAMA | Stratovolcano | Historical | Honshu |
| AKKKTIVNAYA VORONKA | Crater of MUTNOVSKY | Kamchatka Peninsula | |
| AKMOAN | Thermal Feature of MATUTUM | Mindanao | |
| AKOMA, TAVANI | Cone of KUWAE | Vanuatu | |
| AKU | Cone of UDOKAN PLATEAU | Russia (southeastern) | |
| AKUSEKI-JIMA | Stratovolcanoes | Holocene? | Ryukyu Islands & Kyushu |
| AKUTAN | Stratovolcano | Historical | Aleutian Islands |
| AL WAHBAH | Maar of KISHB, HARRAT | Arabia | |
| AL-ARAB, DJEBEL | Synonym of DRUZE, JABAL AD | Syria | |
| AL-DJABAL AL-ASWAD | Synonym of SAWAD, HARRA ES- | Arabia | |
| AL-HARUJ AL ASWAD | Synonym of HARUJ | Africa (northern) | |
| AL-KHURDJ BAL DJILD [KHURDJ EL-AISAR] | Tuff cone of HAYLAN, JABAL | Arabia | |
| ALA DAG | Cone of KARS PLATEAU | Turkey | |
| ALAE | Former pit crater of KILAUEA | Hawaiian Islands | |
| ALAEMBAKEO, VUTI | Cone of AOBA | Vanuatu | |
| ALAGEY | Synonym of ARAGATS | Caucasus, Georgia & Armenia | |
| ALAGOGSHAK | Stratovolcano of MARTIN | Alaska Peninsula | |
| ALAID | Stratovolcano | Historical | Kuril Islands |
| ALAID | Cinder cone of TOLBACHIK | Kamchatka Peninsula | |
| ALAMAGAN | Stratovolcano | Radiocarbon | Izu, Volcano, & Mariana Islands |
| ALANG | Stratovolcano of DIENG VOLCANIC COMPLEX | Java | |
| ALAPARS | Dome of GHEGAM RIDGE | Caucasus, Georgia & Armenia | |
| ALAUAWA, PUU | Cone of HUALALAI | Hawaiian Islands | |
| ALAYTA | Shield volcano | Historical | Africa (northeastern) & Red Sea |
| ALBAINS, MONTS | Synonym of ALBAN HILLS | Italy | |
| ALBAN HILLS | Caldera | Holocene? | Italy |
| ALBAN HILLS | Caldera | Holocene? | Italy |
| ALBANO | Maar of ALBAN HILLS | Italy | |
| ALBANO, MONTE | Cinder cone of ETNA | Italy | |
| ALBANY ISLAND | Cone of SANTIAGO | Galápagos Islands | |
| ALBATROSS POINT | Tuff cone of ANTIPODES ISLAND | Pacific Ocean (southern) | |
| ALBAY VOLCANO | Synonym of MAYON | Luzon | |
| ALBERCA, CERRO DE LA | Cinder cone of MICHOACAN-GUANAJUATO | México | |
| ALBERCA, LA | Maar of MICHOACAN-GUANAJUATO | México | |
| ALBERT PARK | Cone of AUCKLAND FIELD | New Zealand | |
| ALBERT, MT. | Cone of AUCKLAND FIELD | New Zealand | |
| ALBINE-BOLDOK | Cone of AZAS PLATEAU | Russia (southeastern) | |
| ALBIT HUT | Synonym of BIR BORHUT | Arabia | |
| ALBULHEK | Cone of MATUTUM | Mindanao | |
| ALCEDO | Shield volcano | Historical | Galápagos Islands |
| ALCHICHICA | Tuff ring of SERDAN-ORIENTAL | México | |
| ALE BAGU | Stratovolcano | Holocene | Africa (northeastern) & Red Sea |
| ALEBBAGU | Synonym of ALE BAGU | Africa (northeastern) & Red Sea | |
| ALEGRIA, AUSOLES DE LA LAGUNA DE | Thermal Feature of TECAPA | El Salvador & Honduras | |
| ALEGRIA, CERRO | Cone of TECAPA | El Salvador & Honduras | |
| ALESSI, DJEBEL [JABAL EL-ESI] | Stratovolcano of DHAMAR, HARRAS OF | Arabia | |
| ALEXANDER, MT. | Dome of ST. CATHERINE | West Indies | |
| ALEXANDROS | Vent of NISYROS | Greece | |
| ALEYONE | Cone of PLEIADES, THE | Antarctica & South Sandwich Islands | |
| ALFERES, CALDEIRA DO | Cone of SETE CIDADES | Azores | |
| ALFERES, CALDEIRA DO | Cone of SETE CIDADES | Azores | |
| ALFRED PICARD, CRATERE | Crater of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| ALFTAKVISLARHRAUN | Fissure vent of KATLA | Iceland (southern) | |
| ALFTARHOLL | Crater of GRIMSNES | Iceland (southwestern) | |
| ALI BOGO | Synonym of ERTA ALE | Africa (northeastern) & Red Sea | |
| ALI DAG | Dome of ERCIYES DAGI | Turkey | |
| ALIANNGEI | Synonym of ICHINSKY | Kamchatka Peninsula | |
| ALIANTE | Synonym of LLAIMA | Central Chile & Argentina | |
| ALID | Stratovolcano | Holocene | Africa (northeastern) & Red Sea |
| ALIT | Synonym of ALID | Africa (northeastern) & Red Sea | |
| ALITAR | Maar of PURICO COMPLEX | Northern Chile, Bolivia & Argentina | |
| ALJANNGEJ | Synonym of ICHINSKY | Kamchatka Peninsula | |
| ALJOJUCA | Maar of SERDAN-ORIENTAL | México | |
| ALLIGATOR LAKE | Maar of SAN PABLO VOLCANIC FIELD | Luzon | |
| ALLIGATOR LAKE | Volcanic field | Holocene | Canada |
| ALMARCHIGA [VOLCAN DE FASNIA] | Cinder cone of TENERIFE | Canary Islands | |
| ALMASIGAHAN | Dome of LABO | Luzon | |
| ALMENNINGAHRAUN | Fissure vent of KATLA | Iceland (southern) | |
| ALMOLONGA | Stratovolcano | Historical | Guatemala |
| ALMOLONGA, BANOS | Thermal Feature of ALMOLONGA | Guatemala | |
| ALMONZA | Vent of PANTELLERIA | Italy | |
| ALNEI | Synonym of ICHINSKY | Kamchatka Peninsula | |
| ALNEI [ALNEY] | Stratovolcano of ALNEY-CHASHAKONDZHA | Kamchatka Peninsula | |
| ALNEY | Stratovolcano of ALNEY-CHASHAKONDZHA | Kamchatka Peninsula | |
| ALNEY-CHASHAKONDZHA | Stratovolcano | Radiocarbon | Kamchatka Peninsula |
| ALNGEI | Synonym of ALNGEY | Kamchatka Peninsula | |
| ALNGEY | Stratovolcano | Holocene? | Kamchatka Peninsula |
| ALOFAU | Pleistocene caldera of TUTUILA | Samoan & Wallis Islands | |
| ALOI | Former pit crater of KILAUEA | Hawaiian Islands | |
| ALON, MT. | Cone of GAMKONORA | Halmahera | |
| ALPEHUE | Crater of SOLLIPULLI | Central Chile & Argentina | |
| ALSEY | Cone of VESTMANNAEYJAR | Iceland (southern) | |
| ALTA GRACIA | Cinder cone of CONCEPCION | Nicaragua | |
| ALTA, MONTANA | Cone of GRAN CANARIA | Canary Islands | |
| ALTER VOSS | Cone of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| ALTINETES, PICO | Dome of AGUA DE PAU | Azores | |
| ALTO | See proper name (e.g. SANTANO, ALTO LA) | Spanish for PEAK | |
| ALTO GRANDE, CERRO | Cone of IRAZU | Costa Rica | |
| ALTO, CERRO | Shield volcano of MICHOACAN-GUANAJUATO | México | |
| ALTO, CERRO | Dome of PRIMAVERA, SIERRA LA | México | |
| ALTO, CERRO | Cinder cone of CUILAPA-BARBARENA | Guatemala | |
| ALTO, CERRO | Cinder cone of COATEPEQUE CALDERA | El Salvador & Honduras | |
| ALTO, PICO | Stratovolcano of TERCEIRA | Azores | |
| ALU | Fissure vents | Holocene | Africa (northeastern) & Red Sea |
| ALUNALUN | Crater of PAPANDAYAN | Java | |
| ALUTU | Stratovolcano | Radiocarbon | Africa (northeastern) & Red Sea |
| ALVAREZ | Maar of MICHOACAN-GUANAJUATO | México | |
| AMACAN-GOPOD | Thermal Feature of LEONARD RANGE | Mindanao | |
| AMADO | Dome of BORAWLI | Africa (northeastern) & Red Sea | |
| AMAGASE | Thermal Feature of KUJU | Ryukyu Islands & Kyushu | |
| AMAGI | Stratovolcano of IZU-TOBU | Honshu | |
| AMAK | Stratovolcano | Historical | Aleutian Islands |
| 'AM'AM, JABAL | Dome of KHAYBAR, HARRAT | Arabia | |
| AMANI | Cone of NYAMURAGIRA | Africa (central) | |
| AMARCHTA | Synonym of AMUKTA | Aleutian Islands | |
| AMARGURA | Synonym of FONUALEI | Tonga Islands | |
| AMARILLA, MONTANA | Cone of LANZAROTE | Canary Islands | |
| AMARILLO, CERRO | Tuff cone of SAN FELIX | Pacific Ocean (Chilean Islands) | |
| AMARTI | Synonym of BORAWLI | Africa (northeastern) & Red Sea | |
| AMASING | Stratovolcanoes | Holocene | Halmahera |
| AMATEPEQUE [EL JABALI] | Stratovolcano of SAN SALVADOR | El Salvador & Honduras | |
| AMATITLAN | Pleistocene caldera of PACAYA | Guatemala | |
| AMATOFUA | Synonym of TOFUA | Tonga Islands | |
| AMAYA, AUSOLES DE | Thermal Feature of APANECA RANGE | El Salvador & Honduras | |
| AMAYO, VOLCAN | Synonym of FLORES | Guatemala | |
| AMAYTOLI | Synonym of ALE BAGU | Africa (northeastern) & Red Sea | |
| AMBAE | Synonym of AOBA | Vanuatu | |
| AMBALATUNGAN GROUP | Compound volcano | Fumarolic | Luzon |
| AMBANG | Complex volcano | Historical | Sulawesi |
| AMBATO [AMPATO] | Stratovolcano of SABANCAYA | Perú | |
| AMBITLE | Stratovolcano | Radiocarbon | New Ireland |
| AMBOELOMBO | Synonym of EBULOBO | Lesser Sunda Islands | |
| AMBOHIBE | Dome of ITASY VOLCANIC FIELD | Indian Ocean (western) | |
| AMBOHIMALALA | Cone of ITASY VOLCANIC FIELD | Indian Ocean (western) | |
| AMBOHITRITAINERINA | Cone of ITASY VOLCANIC FIELD | Indian Ocean (western) | |
| AMBOHITRONDRY | Cone of ITASY VOLCANIC FIELD | Indian Ocean (western) | |
| AMBRE-BOBAOMBY | Volcanic field | Holocene | Indian Ocean (western) |
| AMBRIM | Synonym of AMBRYM | Vanuatu | |
| AMBRYM | Pyroclastic shield | Historical | Vanuatu |
| AMBUREMBU (AMBUROMBU) | Synonym of EBULOBO | Lesser Sunda Islands | |
| AMEBA | Dome of MEDVEZHIA | Kuril Islands | |
| AMES RANGE | Synonym of ANDRUS | Antarctica & South Sandwich Islands | |
| AMGAI HIGHLANDS-HIGASHI | Vent of IZU-TOBU | Honshu | |
| AMIAK | Synonym of AMAK | Aleutian Islands | |
| AMIATA | Lava domes | Pleistocene-Fumarolic | Italy |
| AMIATA, MONTE | Dome of AMIATA | Italy | |
| AMIC | Crater of SOUFRIERE GUADELOUPE | West Indies | |
| AMIC, MORNE | Dome of SOUFRIERE GUADELOUPE | West Indies | |
| AMIKAKE SPA | Thermal Feature of IWATE | Honshu | |
| AMKA-USYR | Synonym of NEMO PEAK | Kuril Islands | |
| AMOISSA | Synonym of ADWA | Africa (northeastern) & Red Sea | |
| AMOLOC, VOLCAN | Cinder cone of CHICHINAUTZIN | México | |
| AMOR | Stratovolcano of SURETAMATAI | Vanuatu | |
| AMORONG | Lava domes | Fumarolic | Luzon |
| AMPARY | Dome of ITASY VOLCANIC FIELD | Indian Ocean (western) | |
| AMPATO | Stratovolcano of SABANCAYA | Perú | |
| AMSTERDAM ISLAND | Stratovolcano | Holocene | Indian Ocean (southern) |
| AMUCHTA | Synonym of AMUKTA | Aleutian Islands | |
| AMUD, JABAL AL | Cone of HARRAH, AL | Arabia | |
| AMUKTA | Stratovolcano | Historical | Aleutian Islands |
| AMUTYCHI | Cinder cone of UDOKAN PLATEAU | Russia (southeastern) | |
| ANAGI-YAMA [ANANO-YAMA] | Dome of KOZU-SHIMA | Izu, Volcano, & Mariana Islands | |
| ANAGONA | Cone of AOBA | Vanuatu | |
| ANAK KRAKATAU | Cone of KRAKATAU | Krakatau | |
| ANAK RANAKAH | Dome of RANAKAH | Lesser Sunda Islands | |
| ANAKENA, VOLCAN | Pyroclastic Cone of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| ANAMARAMA, MAUNGA | Pyroclastic Cone of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| ANANGUSIK | Synonym of GARELOI | Aleutian Islands | |
| ANANO-YAMA | Dome of IZU-TOBU | Honshu | |
| ANANO-YAMA | Dome of KOZU-SHIMA | Izu, Volcano, & Mariana Islands | |
| ANANOKUBO | Tuff ring of IZU-TOBU | Honshu | |
| ANAOTA | Cone of SAVAI'I | Samoan & Wallis Islands | |
| ANAS | Thermal Feature of BILIRAN | Central Philippines | |
| ANATAHAN | Stratovolcano | Historical | Izu, Volcano, & Mariana Islands |
| ANATOM | Synonym of ANEITYUM | Vanuatu | |
| ANAUN | Stratovolcano | Holocene? | Kamchatka Peninsula |
| ANBURO | Dome of CHACHIMBIRO | Ecuador | |
| ANCHAL, MAAR D' | Maar of CHAINE DES PUYS | Western Europe | |
| ANDAGUA VALLEY [ANDAHUA VALLEY] | Synonym of ANDAHUA-ORCOPAMPA | Perú | |
| ANDAHUA-ORCOPAMPA | Cinder cones | Radiocarbon | Perú |
| ANDES, CERRO LOS | Cone of CHACHANI, NEVADO | Perú | |
| ANDIKLI TEPE | Cone of KARAPINAR FIELD | Turkey | |
| ANDIKLI-AYIRTMEKE TEPE | Cone of KARAPINAR FIELD | Turkey | |
| ANDJASMORO | Stratovolcano of ARJUNO-WELIRANG | Java | |
| ANDRAIKIBA | Crater of ANKARATRA FIELD | Indian Ocean (western) | |
| ANDRANOJAVATRA | Cone of ITASY VOLCANIC FIELD | Indian Ocean (western) | |
| ANDRANORATSY | Crater of ITASY VOLCANIC FIELD | Indian Ocean (western) | |
| ANDRANOTORAHA | Crater of ITASY VOLCANIC FIELD | Indian Ocean (western) | |
| ANDREAS | Vent of NISYROS | Greece | |
| ANDRES | Stratovolcano of PALOMO | Central Chile & Argentina | |
| ANDREW BAY | Caldera of ADAGDAK | Aleutian Islands | |
| ANDREW BAY HOT SPRINGS | Thermal Feature of ADAGDAK | Aleutian Islands | |
| ANDREW'S CONE | Stratovolcano of BARRIER, THE | Africa (eastern) | |
| ANDROMEDA CONE | Cone of IMURUK LAKE | Alaska (western) | |
| ANDRUS | Shield volcanoes | Holocene? | Antarctica & South Sandwich Islands |
| ANEITYUM | Stratovolcanoes | Holocene? | Vanuatu |
| ANETCHOM | Synonym of ANEITYUM | Vanuatu | |
| ANFITRITE | Submarine vent of CAMPI FLEGREI MAR SICILIA | Italy | |
| ANGALAFIB | Cone of BAYUDA VOLCANIC FIELD | Africa (northern) | |
| ANGAR, GOF | Maar of MARSABIT | Africa (eastern) | |
| ANGAVO | Dome of ITASY VOLCANIC FIELD | Indian Ocean (western) | |
| ANGET | Crater of LUMUT BALAI, BUKIT | Sumatra | |
| ANGILA | Cone of LANGILA | New Britain | |
| ANGLAIS, MORNE | Stratovolcano of WATT, MORNE | West Indies | |
| ANGNJIOMAN [ANGNYIOMAN] | Thermal Feature of ILIMUDA | Lesser Sunda Islands | |
| ANGNYIOMAN | Thermal Feature of ILIMUDA | Lesser Sunda Islands | |
| ANGOES, BATOE [BATU ANGUS] | Dome of TONGKOKO | Sulawesi | |
| ANGOSTURA, LA | Tuff ring of HUANQUIHUE GROUP | Central Chile & Argentina | |
| ANGOSTURA, MONTANA DE LA | Cinder cone of TENERIFE | Canary Islands | |
| ANGUREAL | Stratovolcano of CAYAMBE | Ecuador | |
| ANGUS BARU, BATU | Dome of TONGKOKO | Sulawesi | |
| ANGUS, BATU | Crater of BANDA API | Banda Sea | |
| ANGUS, BATU | Dome of TONGKOKO | Sulawesi | |
| ANIAKCHAK | Caldera | Historical | Alaska Peninsula |
| ANILLO, CERRO DEL | Cinder cone of MICHOACAN-GUANAJUATO | México | |
| ANIMAS, CERRO DE LAS | Cone of AZUL, CERRO | Galápagos Islands | |
| ANIR | Synonym of AMBITLE | New Ireland | |
| ANJAR, GUNUNG | Cone of IJEN | Java | |
| ANJAR, KAWAH | Thermal Feature of KAMOJANG, KAWAH | Java | |
| ANKAIZINA FIELD | Cinder cones | Holocene | Indian Ocean (western) |
| ANKARATRA FIELD | Cinder cones | Holocene | Indian Ocean (western) |
| ANNEXATION | Shield volcano of MACAULEY ISLAND | Kermadec Islands | |
| ANOENGOLA [ANUNGGOLA] | Crater of SIRUNG | Lesser Sunda Islands | |
| ANONIMO | Synonym of LLAIMA | Central Chile & Argentina | |
| ANSEI | Crater of KOMAGA-TAKE | Hokkaido | |
| ANTEOJOS, LOS | Dome of COATEPEQUE CALDERA | El Salvador & Honduras | |
| ANTI, GUNUNG | Cone of BATUR | Lesser Sunda Islands | |
| ANTICURA | Cone of ANTILLANCA GROUP | Central Chile & Argentina | |
| ANTICURA | Pyroclastic Cone of PUYEHUE-CORDON CAULLE | Central Chile & Argentina | |
| ANTILLANCA GROUP | Stratovolcanoes | Radiocarbon | Central Chile & Argentina |
| ANTIMILOS | Cone of MILOS | Greece | |
| ANTIPODES ISLAND | Pyroclastic cones | Holocene? | Pacific Ocean (southern) |
| ANTISANA | Stratovolcano | Historical | Ecuador |
| ANTITRUZ, CERRO | Cinder cone of CRATER BASALT VOLCANIC FIELD | Southern Chile & Argentina | |
| ANTIZANA | Synonym of ANTISANA | Ecuador | |
| ANTOCO | Synonym of ANTUCO | Central Chile & Argentina | |
| ANTOFAGASTA DE LA SIERRA | Scoria cones | Holocene | Northern Chile, Bolivia & Argentina |
| ANTOINE, LAKE | Crater of ST. CATHERINE | West Indies | |
| ANTOJO | Synonym of ANTUCO | Central Chile & Argentina | |
| ANTONELLI | Cone of AMSTERDAM ISLAND | Indian Ocean (southern) | |
| ANTONIA PEAK | Synonym of TIATIA | Kuril Islands | |
| ANTSIFEROVA | Synonym of SHIRINKI | Kuril Islands | |
| ANTSIRABE | Cone of ANKARATRA FIELD | Indian Ocean (western) | |
| ANTSIRABLE | Synonym of ANKARATRA FIELD | Indian Ocean (western) | |
| ANTUCO | Stratovolcano | Historical | Central Chile & Argentina |
| ANUNGGOLA | Crater of SIRUNG | Lesser Sunda Islands | |
| ANVIL PEAK | Cone of SEMISOPOCHNOI | Aleutian Islands | |
| ANVIL, THE [EL YUNQUE] | Stratovolcano of ROBINSON CRUSOE | Pacific Ocean (Chilean Islands) | |
| AOBA | Shield volcano | Historical | Vanuatu |
| AOBUNA | Stratovolcano of TOWADA | Honshu | |
| A'OFA | Shield volcano of OFU-OLOSEGA | Samoan & Wallis Islands | |
| AOGA-SHIMA | Stratovolcano | Historical | Izu, Volcano, & Mariana Islands |
| AONE SPA | Thermal Feature of ZAO | Honshu | |
| AOPO [MAUGA MU] | Cinder cone of SAVAI'I | Samoan & Wallis Islands | |
| AP-SAN | Shield volcano of CH'UGA-RYONG | Korea | |
| APACAGUA | Synonym of PACAYA | Guatemala | |
| APACHETA, CERRO | Dome of AZUFRE, CERRO DEL | Northern Chile, Bolivia & Argentina | |
| APACHINSKAIA SOPKA | Synonym of OPALA | Kamchatka Peninsula | |
| APAGADO | Pyroclastic cone | Holocene | Southern Chile & Argentina |
| APAGADO, EL [ESCALANTE] | Stratovolcano of SAIRECABUR | Northern Chile, Bolivia & Argentina | |
| APAKHONCHICH | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| APALE [CERRO AFATE] | Dome of COATEPEQUE CALDERA | El Salvador & Honduras | |
| APALONG | Crater of UMBOI | Northeast of New Guinea | |
| APALSKAIA SOPKA | Synonym of OPALA | Kamchatka Peninsula | |
| APANECA RANGE | Stratovolcanoes | Holocene | El Salvador & Honduras |
| APANECA, CERRO DE | Stratovolcano of APANECA RANGE | El Salvador & Honduras | |
| APANTES, CERRO DE | Cinder cone of SANTIAGO, CERRO | Guatemala | |
| APASTEPE, CERRO | Cinder cone of SAN CRISTOBAL | Nicaragua | |
| APASTEPEQUE FIELD | Volcanic field | Holocene | El Salvador & Honduras |
| APASTEPEQUE, CERRO DE | Dome of APASTEPEQUE FIELD | El Salvador & Honduras | |
| APASTEPEQUE, LAGUNA | Pit crater of APASTEPEQUE FIELD | El Salvador & Honduras | |
| APAXTEPEC | Cinder cone of COLIMA | México | |
| API | Synonym of GUNUNGAPI WETAR | Banda Sea | |
| API SIAU | Synonym of KARANGETANG [API SIAU] | Sangihe Islands | |
| APO | Stratovolcano | Fumarolic | Mindanao |
| APO SPRING | Thermal Feature of APO | Mindanao | |
| APOLIMA | Tuff cone of UPOLU | Samoan & Wallis Islands | |
| APOYEQUE | Pyroclastic shield | Radiocarbon | Nicaragua |
| APOYO | Cone of HOMA MOUNTAIN | Africa (eastern) | |
| APSIAN | Cone of NATIB | Luzon | |
| APUAHOE [ROLLES PEAK] | Stratovolcano of MAROA | New Zealand | |
| ARA-KHANGAY VOLC FIELD | Synonym of TARYATU-CHULUTU | Mongolia | |
| ARA-YAMA | Cone of IZU-TOBU | Honshu | |
| ARA-YAMA | Synonym of NIKKO-SHIRANE | Honshu | |
| ARACAR | Stratovolcano | Uncertain | Northern Chile, Bolivia & Argentina |
| ARADAS, CERRO LAS | Cinder cone of SANTIAGO, CERRO | Guatemala | |
| ARAFO, VOLCAN DE [VOLCAN DE GUIMAR] | Cinder cone of TENERIFE | Canary Islands | |
| ARAGATS | Stratovolcano | Holocene | Caucasus, Georgia & Armenia |
| ARAGATZ | Synonym of ARAGATS | Caucasus, Georgia & Armenia | |
| ARAGAY | Synonym of ARAGATS | Caucasus, Georgia & Armenia | |
| ARAISA | Synonym of ATSONUPURI | Kuril Islands | |
| ARAITO | Synonym of ALAID | Kuril Islands | |
| ARAITO-FUJI | Synonym of ALAID | Kuril Islands | |
| ARAMUACA, LAGUNA | Maar | Holocene | El Salvador & Honduras |
| ARANGUADI | Tuff ring of BISHOFTU VOLCANIC FIELD | Africa (northeastern) & Red Sea | |
| ARARAT | Stratovolcano | Historical | Turkey |
| ARAUMAKUTAN | Synonym of KHARIMKOTAN | Kuril Islands | |
| ARAYAT | Stratovolcano | Holocene? | Luzon |
| ARAYU HOT SPRING | Thermal Feature of TAKAHARA | Honshu | |
| ARBRE | Cone of KARISIMBI | Africa (central) | |
| ARCHIAVERNO | Tuff cone of CAMPI FLEGREI | Italy | |
| ARCTOWSKY | Cone of SEAL NUNATAKS GROUP | Antarctica & South Sandwich Islands | |
| ARCTURUS LAKE | Crater of GENOVESA | Galápagos Islands | |
| ARDJOENO [ARJUNO] | Stratovolcano of ARJUNO-WELIRANG | Java | |
| ARDOUKOBA | Fissure vents | Historical | Africa (northeastern) & Red Sea |
| ARDSCHICH DAGH | Synonym of ERCIYES DAGI | Turkey | |
| AREIA, PICO DA | Dome of FURNAS | Azores | |
| AREKIKAPAKAPA | Thermal Feature of ROTORUA | New Zealand | |
| ARENA, MONTANA DE LA | Cone of FUERTEVENTURA | Canary Islands | |
| ARENAL | Stratovolcano | Historical | Costa Rica |
| ARENAL I | Dome of ATACAZO | Ecuador | |
| ARENAL II | Dome of ATACAZO | Ecuador | |
| ARENAL, CERRO | Cinder cone of MASAYA | Nicaragua | |
| ARENAL, VOLCAN | Tuff ring of LANIN | Central Chile & Argentina | |
| ARENALES | Stratovolcano | Historical | Southern Chile & Argentina |
| ARENAS | Cone of HUMEROS, LOS | México | |
| ARENAS | Crater of RUIZ, NEVADO DEL | Colombia | |
| ARENAS, MONTANA DE LAS [VOLCAN DE GUIMAR] | Cinder cone of TENERIFE | Canary Islands | |
| AREQUIPA, VOLCAN DE | Synonym of MISTI, EL | Perú | |
| 'ARES, DJEBEL EL- [JABAL 'URAIS] | Cone of SAWAD, HARRA ES- | Arabia | |
| ARFAT | Synonym of GAMALAMA | Halmahera | |
| ARGAEUS MONS (ARGAIOS) | Synonym of ERCIYES DAGI | Turkey | |
| ARGAPURA | Stratovolcano of IYANG-ARGAPURA | Java | |
| ARGELIA, CERRO DE | Cone of FLORES | Guatemala | |
| ARGOPEORO [ARGAPURA] | Stratovolcano of IYANG-ARGAPURA | Java | |
| ARHAB, HARRA OF | Volcanic field | Historical | Arabia |
| ARICCIA | Maar of ALBAN HILLS | Italy | |
| ARIS ISLAND | Synonym of BOISA | Northeast of New Guinea | |
| ARJUNO-WELIRANG | Stratovolcano | Historical | Java |
| ARKATHIO | Dome of MILOS | Greece | |
| ARMADILLO PEAK | Stratovolcano of EDZIZA | Canada | |
| ARMADO, EL | Cone of TURRIALBA | Costa Rica | |
| ARMADO, ISLA EL | Tuff ring of ZAPATERA | Nicaragua | |
| ARMAGAN | Cone of GHEGAM RIDGE | Caucasus, Georgia & Armenia | |
| ARMARELO, MONTE | Cone of FOGO | Cape Verde Islands | |
| ARNARDALSOLDUGJOSKA YNGRI | Crater Row of KVERKFJOLL | Iceland (northeastern) | |
| ARNARSETUR | Crater Row of REYKJANES | Iceland (southwestern) | |
| AROOMA | Crater of DUBBI | Africa (northeastern) & Red Sea | |
| AROP | Synonym of LONG ISLAND | Northeast of New Guinea | |
| ARPONG | Cone of ULREUNG | Korea | |
| ARRABALES, CALDERA DE LOS | Cinder cone of FUERTEVENTURA | Canary Islands | |
| ARRAU, VOLCAN | Dome of CHILLAN, NEVADOS DE | Central Chile & Argentina | |
| ARRAYANES | Cone of ANTILLANCA GROUP | Central Chile & Argentina | |
| ARROYO COLORADO | Dome of PRIMAVERA, SIERRA LA | México | |
| ARROYO IXTAHUATONTE | Dome of PRIMAVERA, SIERRA LA | México | |
| ARROYO LA CUARTILLA | Dome of PRIMAVERA, SIERRA LA | México | |
| ARROYO LAS ANIMAS | Dome of PRIMAVERA, SIERRA LA | México | |
| ARROYO LOS PILAS | Dome of PRIMAVERA, SIERRA LA | México | |
| ARROYO SAN JOSE | Synonym of JARAGUAY VOLCANIC FIELD | México | |
| ARROYO SAUCILLO | Vent of PRIMAVERA, SIERRA LA | México | |
| ARSHAN | Cinder cones | Radiocarbon | China (eastern) |
| ARSO | Cone of ISCHIA | Italy | |
| ARSO, MONTE | Cinder cone of ETNA | Italy | |
| ARTALI | Synonym of ERTA ALE | Africa (northeastern) & Red Sea | |
| ARTEMISIO | Synonym of ALBAN HILLS | Italy | |
| ARTEMISIO-TUSCOLANA [TUSCOLANA-ARTEMISIO] | Pleistocene caldera of ALBAN HILLS | Italy | |
| ARUBA ROCK | Tuff cone of NAMARUNU | Africa (eastern) | |
| ARUCAS, MONTANA DE | Cone of GRAN CANARIA | Canary Islands | |
| ARUFAT | Synonym of GAMALAMA | Halmahera | |
| ARUFTA | Stratovolcano of GABILLEMA | Africa (northeastern) & Red Sea | |
| ARUICAS, MONTANA | Cone of GRAN CANARIA | Canary Islands | |
| ARUM, GUNUNG | Cone of SUNDORO | Java | |
| ARUSI | Cone of MEGA BASALT FIELD | Africa (northeastern) & Red Sea | |
| AS SAFA | Synonym of ES SAFA | Syria | |
| AS SUMTH [ET-TADAWIN] | Tuff cone of HAYLAN, JABAL | Arabia | |
| ASACHA | Complex volcano | Holocene | Kamchatka Peninsula |
| ASACHA | Synonym of MUTNOVSKY | Kamchatka Peninsula | |
| ASACHA | Synonym of GORELY | Kamchatka Peninsula | |
| ASAHI-DAKE | Stratovolcano of NASU | Honshu | |
| ASAHI-DAKE | Stratovolcano of DAISETSU | Hokkaido | |
| ASAHINA-DAKE | Dome of OSORE-YAMA | Honshu | |
| ASAKIZUKA | Cone of FUJI | Honshu | |
| ASAM, WAI | Thermal Feature of HULUBELU | Sumatra | |
| ASAMA | Complex volcano | Historical | Honshu |
| ASAR | Shield volcano of HENGILL | Iceland (southwestern) | |
| ASASE | Cone of KIKAI | Ryukyu Islands & Kyushu | |
| ASAVIO | Synonym of ASAVYO | Africa (northeastern) & Red Sea | |
| ASAVYO | Shield volcano | Holocene | Africa (northeastern) & Red Sea |
| ASAY KNOLL | Cone of MARKAGUNT PLATEAU | USA (Utah) | |
| ASBORU | Stratovolcano of GABILLEMA | Africa (northeastern) & Red Sea | |
| ASCENSION | Stratovolcano | Holocene | Atlantic Ocean (central) |
| ASDAGA | Synonym of SORK ALE | Africa (northeastern) & Red Sea | |
| ASEBA, OL DOINYO | Cone of CHYULU HILLS | Africa (eastern) | |
| ASH CONE | Cone of MERU | Africa (eastern) | |
| ASH HILL | Tuff cone of AUCKLAND FIELD | New Zealand | |
| ASH MOUNTAIN | Tuya of TUYA VOLCANIC FIELD | Canada | |
| ASH PIT, THE | Cone of SPECTRUM RANGE | Canada | |
| ASHEN HILLS | Cone of MICHAEL | Antarctica & South Sandwich Islands | |
| ASHES VENT FIELD | Thermal Feature of AXIAL SEAMOUNT | Pacific Ocean (northern) | |
| ASHI SHAN | Cinder cone of KUNLUN VOLCANIC GROUP | China (western) | |
| ASHTARAK | Pyroclastic Cone of ARAGATS | Caucasus, Georgia & Armenia | |
| 'ASI, HALA-'L- | Tuff cone of 'UWAYRID, HARRAT | Arabia | |
| ASI, MT. | Cone of SAVAI'I | Samoan & Wallis Islands | |
| ASIN | Thermal Feature of PINATUBO | Luzon | |
| ASIN HOT SPRING | Thermal Feature of NATIB | Luzon | |
| ASK | Thermal Feature of DAMAVAND | Iran & Afghanistan | |
| ASKAHRAUN | Fissure vent of BARDARBUNGA | Iceland (northeastern) | |
| ASKEDNA HOT SPRING | Thermal Feature of BABUYAN CLARO | North of Luzon | |
| ASKJA | Stratovolcano | Historical | Iceland (northeastern) |
| ASLAJ, JABAL | Cinder cone of KISHB, HARRAT | Arabia | |
| ASMARA | Pyroclastic Cone of DAMA ALI | Africa (northeastern) & Red Sea | |
| ASO | Caldera | Historical | Ryukyu Islands & Kyushu |
| ASO-SAN | Synonym of ASO | Ryukyu Islands & Kyushu | |
| ASO-UCHINOMAKI | Thermal Feature of ASO | Ryukyu Islands & Kyushu | |
| ASOBENOMORI | Synonym of IWAKI | Honshu | |
| ASOG | Synonym of IRIGA | Luzon | |
| ASOMADA, MONTANA DE | Cinder cone of HIERRO | Canary Islands | |
| ASOMADAS NEGRAS, MONTANA | Cinder cone of HIERRO | Canary Islands | |
| ASOSOSCA, CERRO | Stratovolcano of PILAS, LAS | Nicaragua | |
| ASOSOSCA, LAGUNA DE | Maar of PILAS, LAS | Nicaragua | |
| ASOSOSCA, LAGUNA DE | Crater of NEJAPA-MIRAFLORES | Nicaragua | |
| ASPERO, CERRO | Dome of PURICO COMPLEX | Northern Chile, Bolivia & Argentina | |
| ASPRONISI | Tuff ring of SANTORINI | Greece | |
| ASSAB VOLCANIC FIELD | Volcanic field | Holocene | Africa (northeastern) & Red Sea |
| ASSALO | Synonym of AYELU | Africa (northeastern) & Red Sea | |
| ASSIRMATSKY | Synonym of EBEKO | Kuril Islands | |
| ASSONGSONG | Synonym of ASUNCION | Izu, Volcano, & Mariana Islands | |
| ASTILLERO, CERRITO EL | Lava cone of CHIQUIMULA VOLCANIC FIELD | Guatemala | |
| ASTILLERO, CERRO EL | Cinder cone of MICHOACAN-GUANAJUATO | México | |
| ASTILLERO, CERRO EL | Cinder cone of SANTA ANA | El Salvador & Honduras | |
| ASTROL, PUIG | Cone of OLOT VOLCANIC FIELD | Western Europe | |
| ASTRONI | Tuff ring of CAMPI FLEGREI | Italy | |
| ASUNCION | Stratovolcano | Historical | Izu, Volcano, & Mariana Islands |
| ASUNCION, LA | Cone of SUCHITAN | Guatemala | |
| ASUR | Synonym of YASUR | Vanuatu | |
| AT-TABAB | Tuff cone of BAL HAF, HARRA OF | Arabia | |
| ATACAMA, VOLCAN DE | Synonym of LICANCABUR | Northern Chile, Bolivia & Argentina | |
| ATACAMA, VOLCAN DE | Synonym of LASTARRIA | Northern Chile, Bolivia & Argentina | |
| ATACAZO | Stratovolcano | Radiocarbon | Ecuador |
| ATAGAWA-KAIKYU | Submarine vent of IZU-TOBU | Honshu | |
| ATAKOR VOLCANIC FIELD | Scoria cones | Holocene | Africa (northern) |
| ATALAYA, LA | Cone of TENERIFE | Canary Islands | |
| ATAPIJUK, BUKIT | Cone of HUTAPANJANG | Sumatra | |
| ATCHI-YAMA [ACHI-YAMA] | Dome of NII-JIMA | Izu, Volcano, & Mariana Islands | |
| ATEXCAC, LAGUNA | Maar of SERDAN-ORIENTAL | México | |
| ATIAMURI | Thermal Feature of MAROA | New Zealand | |
| ATIMBIA, MT. | Cone of SAN PABLO VOLCANIC FIELD | Luzon | |
| ATITLAN | Stratovolcano | Historical | Guatemala |
| ATKA | Stratovolcanoes | Historical | Aleutian Islands |
| ATLACORRA, VOLCAN | Cinder cone of CHICHINAUTZIN | México | |
| ATLAS, MOUNT [MOUNT PLEIONES] | Stratovolcano of PLEIADES, THE | Antarctica & South Sandwich Islands | |
| ATLASOV (ATLASOVA) | Synonym of NYLGIMELKIN | Kamchatka Peninsula | |
| ATLASOV | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| ATLIN VOLCANIC FIELD | Cinder cones | Holocene | Canada |
| ATLIXCOS, LOS | Shield volcano | Holocene | México |
| ATOSA (ATOSANOBORI) | Synonym of ATSONUPURI | Kuril Islands | |
| ATOSANUPURI | Dome of KUTCHARO | Hokkaido | |
| ATOSANUPURI | Synonym of ATSONUPURI | Kuril Islands | |
| ATSONUPURI | Stratovolcano | Historical | Kuril Islands |
| ATTALORA, CUDDIA | Cone of PANTELLERIA | Italy | |
| ATTI-YAMA [ACHI-YAMA] | Dome of NII-JIMA | Izu, Volcano, & Mariana Islands | |
| ATTUS | Dome of GHEGAM RIDGE | Caucasus, Georgia & Armenia | |
| ATUEL, CALDERA DEL | Caldera | Holocene | Central Chile & Argentina |
| ATUG | Cone of MOTLAV | Vanuatu | |
| ATUK MOUNTAIN | Cone of KOOKOOLIGIT MOUNTAINS | Alaska (western) | |
| ATUNAPARA | Thermal Feature of DAWSON STRAIT GROUP | New Guinea & D'Entrecasteaux Islands | |
| ATUPUTIH | Cone of KEMBAR | Sumatra | |
| ATWELL PEAK | Dome of GARIBALDI | Canada | |
| AUCANQUILCHA | Stratovolcano | Pleistocene-Fumarolic | Northern Chile, Bolivia & Argentina |
| AUCKLAND FIELD | Volcanic field | Radiocarbon | New Zealand |
| AUEL | Maar of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| AUGUSTINE | Lava domes | Historical | Alaska (southwestern) |
| AUNUU ISLAND | Tuff cone of TUTUILA | Samoan & Wallis Islands | |
| AUQUIHUATO, CERRO | Cinder cone | Holocene? | Perú |
| AURUHOE [NGAURUHOE] | Stratovolcano of TONGARIRO | New Zealand | |
| AUSOLES | See proper name (e.g. SAN VICENTE, AUSOLES DE) | Spanish for FUMAROLE FIELD | |
| AUSTURHRAUN | Fissure vent of HEKLA | Iceland (southern) | |
| AUVERGNE, MONTS D' | Synonym of CHAINE DES PUYS | Western Europe | |
| AVACHA | Synonym of AVACHINSKY | Kamchatka Peninsula | |
| AVACHI | Cone of AVACHINSKY | Kamchatka Peninsula | |
| AVACHINSKAIA, SOPKA | Synonym of AVACHINSKY | Kamchatka Peninsula | |
| AVACHINSKY | Stratovolcano | Historical | Kamchatka Peninsula |
| AVAZAN | Dome of GHEGAM RIDGE | Caucasus, Georgia & Armenia | |
| AVDALSMOYA | Dome of JAN MAYEN | Atlantic Ocean (Jan Mayen) | |
| AVERNO | Tuff ring of CAMPI FLEGREI | Italy | |
| AVLHAUGENE | Tuff ring of JAN MAYEN | Atlantic Ocean (Jan Mayen) | |
| AWAATUA BAY | Crater of OKATAINA | New Zealand | |
| AWARU RIVER | Synonym of MUSA RIVER | New Guinea & D'Entrecasteaux Islands | |
| AWASA | Pleistocene caldera of CORBETTI CALDERA | Africa (northeastern) & Red Sea | |
| AWATSCHA (AWATSCHINSKIJ) | Synonym of AVACHINSKY | Kamchatka Peninsula | |
| 'AWAYRIDH, HARRAT EL- | Synonym of 'UWAYRID, HARRAT | Arabia | |
| AWIBENGKOK | Thermal Feature of PERBAKTI-GAGAK | Java | |
| AWOE | Synonym of AWU | Sangihe Islands | |
| AWOEH | Synonym of KARANGETANG [API SIAU] | Sangihe Islands | |
| AWU | Stratovolcano | Historical | Sangihe Islands |
| AXIAL GARDENS VENT FIELD | Thermal Feature of AXIAL SEAMOUNT | Pacific Ocean (northern) | |
| AXIAL SEAMOUNT | Submarine volcano | Historical | Pacific Ocean (northern) |
| AXLARGIGUR | Fissure vent of HEKLA | Iceland (southern) | |
| AXUSCO [LAGUNA DE ASOSOSCA] | Maar of PILAS, LAS | Nicaragua | |
| AY-ALU | Synonym of AYELU | Africa (northeastern) & Red Sea | |
| AYAGSH | Synonym of MAKUSHIN | Aleutian Islands | |
| AYAKAN | Crater of GUNTUR | Java | |
| AYAKTAS TEPE | Cone of ACIGOL-NEVSEHIR | Turkey | |
| AYALU | Synonym of AYELU | Africa (northeastern) & Red Sea | |
| AYAQUEME, CERRO | Cone of CHICHINAUTZIN | México | |
| AYECO [MALA CARA] | Stratovolcano of SANTA ANA | El Salvador & Honduras | |
| AYELU | Stratovolcano | Holocene | Africa (northeastern) & Red Sea |
| AYER PANAS | Thermal Feature of LUMUT BALAI, BUKIT | Sumatra | |
| AYGIRGOLU | Maar of SUPHAN DAGI | Turkey | |
| AYMOND | Cinder cone of PALEI-AIKE VOLCANIC FIELD | Southern Chile & Argentina | |
| AYYALU | Synonym of ADWA | Africa (northeastern) & Red Sea | |
| AZAFATUDO, CERRO | Synonym of SOTARA | Colombia | |
| AZAS PLATEAU | Volcanic field | Holocene | Russia (southeastern) |
| AZEITONA, PICO DA | Cone of FURNAS | Azores | |
| AZHDAHAK | Cone of GHEGAM RIDGE | Caucasus, Georgia & Armenia | |
| AZUCAR, PITON DE [PICO DEL TEIDE] | Stratovolcano of TENERIFE | Canary Islands | |
| AZUFRADO | Stratovolcano of PLATANAR | Costa Rica | |
| AZUFRADOS, BANOS | Thermal Feature of ALMOLONGA | Guatemala | |
| AZUFRAL | Thermal Feature of TECUAMBURRO | Guatemala | |
| AZUFRAL | Stratovolcano | Radiocarbon | Colombia |
| AZUFRAL DE TUQUERRES | Synonym of AZUFRAL | Colombia | |
| AZUFRAL, EL | Crater of PUYEHUE-CORDON CAULLE | Central Chile & Argentina | |
| AZUFRALES | Thermal Feature of RINCON DE LA VIEJA | Costa Rica | |
| AZUFRE | Caldera of PLANCHON-PETEROA | Central Chile & Argentina | |
| AZUFRE, BANOS | Thermal Feature of PLANCHON-PETEROA | Central Chile & Argentina | |
| AZUFRE, CERRO DE | Synonym of LASTARRIA | Northern Chile, Bolivia & Argentina | |
| AZUFRE, CERRO DE | Synonym of COPIAPO | Northern Chile, Bolivia & Argentina | |
| AZUFRE, CERRO DEL | Stratovolcano | Holocene? | Northern Chile, Bolivia & Argentina |
| AZUFRE, MT. | Thermal Feature of MANDALAGAN | Central Philippines | |
| AZUFRE, VOLCAN DE | Thermal Feature of NEGRA, SIERRA | Galápagos Islands | |
| AZUFRE, VOLCAN EL | Stratovolcano of TRES VIRGENES | México | |
| AZUFRE-PLACHON-PETEROA | Synonym of PLANCHON-PETEROA | Central Chile & Argentina | |
| AZUFREAS, VOLCAN | Stratovolcano of TINGUIRIRICA | Central Chile & Argentina | |
| AZUFRERA AGUAS CALIENTES, CERRO | Cone of CORDON DE PUNTAS NEGRAS | Northern Chile, Bolivia & Argentina | |
| AZUFRERA PERRO MUERTO, CERRO | Cone of CORDON DE PUNTAS NEGRAS | Northern Chile, Bolivia & Argentina | |
| AZUFRERA YACIMIENTO, CERRO | Cone of CORDON DE PUNTAS NEGRAS | Northern Chile, Bolivia & Argentina | |
| AZUFRERAS TUYAJTO | Cone of CORDON DE PUNTAS NEGRAS | Northern Chile, Bolivia & Argentina | |
| AZUFRERES, LAS [LOS AZUFRES] | Thermal Feature of PUYEHUE-CORDON CAULLE | Central Chile & Argentina | |
| AZUFRES, LOS | Caldera | Pleistocene-Fumarolic | México |
| AZUFRES, LOS | Thermal Feature of PUYEHUE-CORDON CAULLE | Central Chile & Argentina | |
| AZUL, CERRO | Dome of ZITACUARO-VALLE DE BRAVO | México | |
| AZUL, CERRO | Shield volcano | Historical | Galápagos Islands |
| AZUL, CERRO | Cone of SAN CRISTOBAL | Galápagos Islands | |
| AZUL, CERRO | Stratovolcano | Historical | Central Chile & Argentina |
| AZUL, VOLCAN | Cinder cones | Holocene | Nicaragua |
| AZUMA | Stratovolcanoes | Historical | Honshu |
| AZUMA-KOFUJI | Cone of AZUMA | Honshu | |
| AZUMA-KOHUZI [AZUMA-KOFUJI] | Cone of AZUMA | Honshu | |
| AZUMA-YAMA | Dome of UNZEN | Ryukyu Islands & Kyushu | |
| AZUMA-YAMA | Synonym of FUJI | Honshu | |
| BA, JABAL [JABAL BA'A] | Cone of BIRK, HARRAT AL | Arabia | |
| BA'A, JABAL | Cone of BIRK, HARRAT AL | Arabia | |
| BAARLEY | Cinder cone of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| BABASE | Stratovolcano of AMBITLE | New Ireland | |
| BABBINGTONS HILL | Dome of NEWER VOLCANICS PROV | Australia | |
| BABILONIA, CERRO | Stratovolcano of YOJOA, LAKE | El Salvador & Honduras | |
| BABIY KAMEN | Dome of BARKHATNAYA SOPKA | Kamchatka Peninsula | |
| BABUYAN CLARO | Stratovolcanoes | Historical | North of Luzon |
| BABUYAN, MT. [SMITH VOLCANO] | Cinder cone of BABUYAN CLARO | North of Luzon | |
| BACHELOR | Stratovolcano | Tephrochronology | USA (Oregon) |
| BACHELOR BUTTE | Synonym of BACHELOR | USA (Oregon) | |
| BACKLOCKDAM | Crater of HALLA | Korea | |
| BACOLI | Crater of CAMPI FLEGREI | Italy | |
| BACON-MANITO COMPLEX | Synonym of POCDOL MOUNTAINS | Luzon | |
| BADAK | Crater of KELUT | Java | |
| BADAK, KAWAH | Crater of TANGKUBANPARAHU | Java | |
| BADDI KOMA | Tuff cone of ARDOUKOBA | Africa (northeastern) & Red Sea | |
| BADGER PEAK | Cone of MEDICINE LAKE | USA (California) | |
| BADILLO CRATER | Maar of PINACATE | México | |
| BADJINI | Cone of KARTHALA | Indian Ocean (western) | |
| BADLANDS | Synonym of ELMENTEITA BADLANDS | Africa (eastern) | |
| BADSVALLAGIGIR | Crater Row of REYKJANES | Iceland (southwestern) | |
| BAEGDU | Synonym of CHANGBAISHAN | China (eastern) | |
| BAEJARHRAUN | Fissure vent of HEKLA | Iceland (southern) | |
| BAEKDOOSAN | Synonym of CHANGBAISHAN | China (eastern) | |
| BAGA TOGO UUL | Cinder cone of KHANUY GOL | Mongolia | |
| BAGAGAURE | Thermal Feature of DAWSON STRAIT GROUP | New Guinea & D'Entrecasteaux Islands | |
| BAGANA | Lava cone | Historical | Bougainville & Solomon Islands |
| BAGIAI | Cone of KARKAR | Northeast of New Guinea | |
| BAGUSA | Crater of BUNYARUGURU | Africa (central) | |
| BAIA | Tuff ring of CAMPI FLEGREI | Italy | |
| BAIA DI LEVANTE | Thermal Feature of VULCANO | Italy | |
| BAIDJAN | Thermal Feature of DAMAVAND | Iran & Afghanistan | |
| BAISHAN [PECHAN] | Cone of TIANSHAN VOLCANIC GROUP | China (western) | |
| BAITOUSHAN | Synonym of CHANGBAISHAN | China (eastern) | |
| BAIYUDA VOLC FIELD | Synonym of BAYUDA VOLCANIC FIELD | Africa (northern) | |
| BAJAWA | Thermal Feature of INIERIE | Lesser Sunda Islands | |
| BAKAL | Cone of ARJUNO-WELIRANG | Java | |
| BAKANG (BAKANGIN) | Synonym of BAKENING | Kamchatka Peninsula | |
| BAKENING | Stratovolcano | Tephrochronology | Kamchatka Peninsula |
| BAKENING | Stratovolcano | Tephrochronology | Kamchatka Peninsula |
| BAKER | Stratovolcanoes | Historical | USA (Washington) |
| BAKER HOT SPRINGS | Thermal Feature of BAKER | USA (Washington) | |
| BAKIA WARM SPRINGS | Thermal Feature of BANAHAW | Luzon | |
| BAKKENIN | Synonym of BAKENING | Kamchatka Peninsula | |
| BAL HAF, HARRA OF | Volcanic field | Holocene | Arabia |
| BALAI, BUKIT | Stratovolcano of LUMUT BALAI, BUKIT | Sumatra | |
| BALAK | Caldera of SEKINCAU BELIRANG | Sumatra | |
| BALANTOK | Cone of TAAL | Luzon | |
| BALASTRERA, EL CERRITO [CERRO EL CERRITO] | Cinder cone of SAN SALVADOR | El Salvador & Honduras | |
| BALATOCAN | Synonym of BALATUKAN | Mindanao | |
| BALATUKAN | Compound volcano | Uncertain | Mindanao |
| BALBI | Stratovolcano | Holocene | Bougainville & Solomon Islands |
| BALD CRATER | Cinder cone of CRATER LAKE | USA (Oregon) | |
| BALD KNOLL | Cinder cones | Holocene | USA (Utah) |
| BALENG | Maar of OKU VOLCANIC FIELD | Africa (western) | |
| BALI, PEAK OF | Synonym of AGUNG | Lesser Sunda Islands | |
| BALILE | Cone of ILIBOLENG | Lesser Sunda Islands | |
| BALINGOAN | Synonym of BALATUKAN | Mindanao | |
| BALJANE | Cone of JAN MAYEN | Atlantic Ocean (Jan Mayen) | |
| BALLENA, CERRO | Tuff cone of NEGRA, SIERRA | Galápagos Islands | |
| BALMANN, PITON DE | Cinder cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| BALMET, PUY | Cone of CHAINE DES PUYS | Western Europe | |
| BALONG ANITO | Thermal Feature of MARIVELES | Luzon | |
| BALUAN | Stratovolcano | Holocene? | Admiralty Islands |
| BALURAN | Stratovolcano | Holocene? | Java |
| BALUSAN | Synonym of BULUSAN | Luzon | |
| BALUT | Stratovolcano | Fumarolic | Mindanao |
| BAM | Stratovolcano | Historical | Northeast of New Guinea |
| BAMAOQIONGZHONG | Shield volcano of UNNAMED | China (western) | |
| BAMBANG, GUNUNG | Maar of MURIA | Java | |
| BAMBULUWE, LAKE | Maar of OKU VOLCANIC FIELD | Africa (western) | |
| BAMNI | Synonym of PORAK | Caucasus, Georgia & Armenia | |
| BAMUS | Stratovolcano | Anthropology | New Britain |
| BAN-YAGAMINE | Stratovolcano of KUCHINOERABU-JIMA | Ryukyu Islands & Kyushu | |
| BANAHAO | Synonym of BANAHAW | Luzon | |
| BANAHAW | Complex volcano | Holocene | Luzon |
| BANAHAW DE LUCBAN | Stratovolcano of BANAHAW | Luzon | |
| BANAJAO | Synonym of BANAHAW | Luzon | |
| BANBANLONGWAN | Crater of LONGGANG GROUP | China (eastern) | |
| BANCAH CALDERA | Caldera of MARAPI | Sumatra | |
| BANCEN | Thermal Feature of MERBABU | Java | |
| BANCO DI NISIDA | Tuff cone of CAMPI FLEGREI | Italy | |
| BANCO MISENO | Cone of CAMPI FLEGREI | Italy | |
| BANDA API | Caldera | Historical | Banda Sea |
| BANDAI | Stratovolcano | Historical | Honshu |
| BANDAI-SAN | Synonym of BANDAI | Honshu | |
| BANDAIKO HOT SPRINGS | Thermal Feature of KUSATSU-SHIRANE | Honshu | |
| BANDAMA, CALDERA DE | Maar of GRAN CANARIA | Canary Islands | |
| BANDERA CRATER | Cone of ZUNI-BANDERA | USA (New Mexico) | |
| BANDERA LAVA FIELD | Synonym of ZUNI-BANDERA | USA (New Mexico) | |
| BANDERA, CERRO | Cinder cone of ZUNI-BANDERA | USA (New Mexico) | |
| BANDERA, CERRO DE LA | Synonym of CONCHAGUA | El Salvador & Honduras | |
| BANDERAS, CERRO LAS | Dome of ZAPATERA | Nicaragua | |
| BANGA-BANGA | Dome of LABO | Luzon | |
| BANGESHAN | Cone of TENGCHONG | Southeast Asia | |
| BANGO | Synonym of PAGO | New Britain | |
| BANI ABDULLAH, HARRAT | Volcanic field of RAHAT, HARRAT | Arabia | |
| BANNIERES, PUY DES | Cone of CHAINE DES PUYS | Western Europe | |
| BANOEA WOEHOE | Synonym of BANUA WUHU | Sangihe Islands | |
| BANOS | See proper name (e.g. AZUFRADOS, BANOS) | Spanish for SPA | |
| BANOS, CRATERES DE LOS | Dome of MAULE, LAGUNA DEL | Central Chile & Argentina | |
| BANOS, LOS | Thermal Feature of TROMEN | Central Chile & Argentina | |
| BANOS, NEVADO DE LOS | Synonym of PLANCHON-PETEROA | Central Chile & Argentina | |
| BANTJAH CALDERA [BANCAH CALDERA] | Caldera of MARAPI | Sumatra | |
| BANUA BAUJA (BANUA BAUYA) | Synonym of BANUA WUHU | Sangihe Islands | |
| BANUA WUHU | Submarine volcano | Historical | Sangihe Islands |
| BANYUDENG HOT SPRING | Thermal Feature of BRATAN | Lesser Sunda Islands | |
| BAR-ALI | Cone of DABBAYRA | Africa (northeastern) & Red Sea | |
| BAR-ALI | Cone of DABBAYRA | Africa (northeastern) & Red Sea | |
| BARACHUMA, GOF | Maar of MARSABIT | Africa (eastern) | |
| BARAHONA, CERRO | Pyroclastic Cone of NEGRA, SIERRA | Galápagos Islands | |
| BARANII [BARANY] | Stratovolcano of GAMCHEN | Kamchatka Peninsula | |
| BARANII AMPHITHEATER [BARANY AMPHITHEATER} | Crater of OPALA | Kamchatka Peninsula | |
| BARANSKII | Synonym of BARANSKY | Kuril Islands | |
| BARANSKY | Stratovolcano | Historical | Kuril Islands |
| BARANY | Stratovolcano of GAMCHEN | Kamchatka Peninsula | |
| BARANY AMPHITHEATER | Crater of OPALA | Kamchatka Peninsula | |
| BARARUMBO | Cone of BAYUDA VOLCANIC FIELD | Africa (northern) | |
| BARBA | Synonym of BARVA | Costa Rica | |
| BARBERENA, CERRITO DE | Cinder cone of CUILAPA-BARBARENA | Guatemala | |
| BARCENA | Cinder cones | Historical | México |
| BARDARBUNGA | Stratovolcano | Historical | Iceland (northeastern) |
| BARDARLAUG | Cone of SNAEFELLSJOKULL | Iceland (western) | |
| BARE MOUNTAIN | Cone of WEST CRATER | USA (Washington) | |
| BARICCIA [BERICHA] | Stratovolcano of BOSET-BERICHA | Africa (northeastern) & Red Sea | |
| BARICHA [BERICHA] | Stratovolcano of BOSET-BERICHA | Africa (northeastern) & Red Sea | |
| BARIK | Stratovolcano of UMBOI | Northeast of New Guinea | |
| BARKHATNAYA | Cone of VILYUCHIK | Kamchatka Peninsula | |
| BARKHATNAYA SOPKA | Lava domes | Tephrochronology | Kamchatka Peninsula |
| BARME, PUY DE | Cone of CHAINE DES PUYS | Western Europe | |
| BARNABE, PICO | Dome of AGUA DE PAU | Azores | |
| BARNABORG | Cone of LJOSUFJOLL | Iceland (western) | |
| BAROMBE KOTO, LAKE | Maar of TOMBEL GRABEN | Africa (western) | |
| BAROMBE MBO, LAKE | Maar of TOMBEL GRABEN | Africa (western) | |
| BAROS | Cone of SIBAYAK | Sumatra | |
| BARRANCAS, CERRO | Cone of MAULE, LAGUNA DEL | Central Chile & Argentina | |
| BARRANCAS, VOLCAN | Dome of MAULE, LAGUNA DEL | Central Chile & Argentina | |
| BARRANCO NEGRO, CERRO | Cinder cone of CINOTEPEQUE, CERRO | El Salvador & Honduras | |
| BARRANCO, EL | Maar of COSIGUINA | Nicaragua | |
| BARRANES COLORADO | Cone of HUEQUI | Southern Chile & Argentina | |
| BARRANTES, LOMA | Cinder cone of PLATANAR | Costa Rica | |
| BARREN ISLAND | Stratovolcano | Historical | Andaman Islands |
| BARRERA, CERRO | Cone of TENORIO | Costa Rica | |
| BARRIER, THE | Shield volcano | Historical | Africa (eastern) |
| BARTHOLOME, PIC | Stratovolcano of KARISIMBI | Africa (central) | |
| BARTHOLOMEW ISLAND | Crater of SANTIAGO | Galápagos Islands | |
| BARU | Crater of GEDE | Java | |
| BARU | Stratovolcano | Historical | Panamá |
| BARU [GUNUNG BARUJARI] | Cone of RINJANI | Lesser Sunda Islands | |
| BARU, KABA | Crater of KABA | Sumatra | |
| BARU, KAWAH | Crater of TANGKUBANPARAHU | Java | |
| BARU, KAWAH | Crater of PAPANDAYAN | Java | |
| BARUJARI, GUNUNG | Cone of RINJANI | Lesser Sunda Islands | |
| BARUN-NERTE-ULA | Cone of DARIGANGA VOLCANIC FIELD | Mongolia | |
| BARUS, BUKIT | Cone of SIBAYAK | Sumatra | |
| BARUTA | Stratovolcano of NYIRAGONGO | Africa (central) | |
| BARVA | Complex volcano | Tephrochronology | Costa Rica |
| BAS DONG NAI | Volcanic field | Holocene? | Southeast Asia |
| BASANJO | Synonym of LENGAI, OL DOINYO | Africa (eastern) | |
| BASAR | Synonym of BESAR | Sumatra | |
| BASEN | Cone of JAN MAYEN | Atlantic Ocean (Jan Mayen) | |
| BASILE, PICO DE | Synonym of SANTA ISABEL | Africa (western) | |
| BASILUZZO | Dome of PANAREA | Italy | |
| BASS MARLE | Synonym of CENTRAL ISLAND | Africa (eastern) | |
| BASSO NAROK | Synonym of CENTRAL ISLAND | Africa (eastern) | |
| BASTIONI HILL | Dome of MERU | Africa (eastern) | |
| BASTON | Crater of GALERAS | Colombia | |
| BASU | Cinder cone of SAN QUINTIN VOLCANIC FIELD | México | |
| BATANG | Dome of MERAPI | Java | |
| BATAPONA MOUNTAIN | Cone of BALUAN | Admiralty Islands | |
| BATEA, LA | Cone of MICHOACAN-GUANAJUATO | México | |
| BATHHOUSE SPRING | Thermal Feature of VALLES CALDERA | USA (New Mexico) | |
| BATIDORAS, LAS | Thermal Feature of COSIGUINA | Nicaragua | |
| BATOE | See proper name (e.g. TARA, BATOE) | Dutch spelling of Indonesian word for MT. | |
| BATOER | Synonym of BATUR | Lesser Sunda Islands | |
| BATOK | Cinder cone of TENGGER CALDERA | Java | |
| BATOR | Synonym of BATUR | Lesser Sunda Islands | |
| BATSHRAUN | Fissure vent of ASKJA | Iceland (northeastern) | |
| BATU | See proper name (e.g. ANGUS, BATU) | Indonesian for MT. | |
| BATU FIELD | Thermal Feature of KEMBAR | Sumatra | |
| BATUAN, MT. | Cone of BULUSAN | Luzon | |
| BATUHARANG, DOLOK | Cone of TOBA | Sumatra | |
| BATUKAU | Stratovolcano of BRATAN | Lesser Sunda Islands | |
| BATUKOLOK | Thermal Feature of TONDANO CALDERA | Sulawesi | |
| BATULAO, MT. | Stratovolcano of TAAL | Luzon | |
| BATUR | Caldera | Historical | Lesser Sunda Islands |
| BATURITI HOT SPRING | Thermal Feature of BRATAN | Lesser Sunda Islands | |
| BATUWALANG MERAPI | Stratovolcano of MERAPI | Java | |
| BAUL, EL [CERRO TECUN UMAN] | Dome of ALMOLONGA | Guatemala | |
| BAY OF ISLANDS | Synonym of KAIKOHE-BAY OF ISLANDS | New Zealand | |
| BAYABES | Dome of LABO | Luzon | |
| BAYAN-TSAGAN | Cone of DARIGANGA VOLCANIC FIELD | Mongolia | |
| BAYAQUITOS, MT. | Cone of SAN PABLO VOLCANIC FIELD | Luzon | |
| BAYDA, JABAL | Tuff cone of KHAYBAR, HARRAT | Arabia | |
| BAYO, CERRO | Complex volcano | Holocene | Northern Chile, Bolivia & Argentina |
| BAYO, CERRO | Cone of TROMEN | Central Chile & Argentina | |
| BAYONESU-GANSHO | Synonym of BAYONNAISE ROCKS | Izu, Volcano, & Mariana Islands | |
| BAYONNAISE REEF | Synonym of BAYONNAISE ROCKS | Izu, Volcano, & Mariana Islands | |
| BAYONNAISE ROCKS | Submarine volcano | Historical | Izu, Volcano, & Mariana Islands |
| BAYUDA VOLCANIC FIELD | Cinder cones | Radiocarbon | Africa (northern) |
| BAYUYO | Vent of FUERTEVENTURA | Canary Islands | |
| BAZMAN | Stratovolcano | Fumarolic | Iran & Afghanistan |
| BEAGLE | Tuff cone of DARWIN | Galápagos Islands | |
| BEAR BUTTE | Cone of CRATER LAKE | USA (Oregon) | |
| BEAR WALLOW BUTTE | Cinder cone of TUMBLE BUTTES | USA (California) | |
| BEARHEAD PEAK | Dome of VALLES CALDERA | USA (New Mexico) | |
| BEARPAW BUTTE | Cone of MEDICINE LAKE | USA (California) | |
| BEAULOUP, MAAR DE | Maar of CHAINE DES PUYS | Western Europe | |
| BEAUNIT, CRATERE DE | Maar of CHAINE DES PUYS | Western Europe | |
| BEAVER RIDGE | Vent of BLACK ROCK DESERT | USA (Utah) | |
| BECCO, MT. | Cone of VULSINI | Italy | |
| BEDALI, RANU | Maar of LAMONGAN | Java | |
| BEDR, HALA-'L- | Cone of 'UWAYRID, HARRAT | Arabia | |
| BEDUL | Cone of ST. ANDREW STRAIT | Admiralty Islands | |
| BEEHIVES, THE | Dome of TARANAKI [EGMONT] | New Zealand | |
| BEEHIVES, THE [DAVAPIA ROCKS] | Cone of RABAUL | New Britain | |
| BEERENBERG | Stratovolcano of JAN MAYEN | Atlantic Ocean (Jan Mayen) | |
| BEGOUR | Maar of TOH, TARSO | Africa (northern) | |
| BEHM CANAL-RUDYERD BAY | Cinder cones | Holocene? | Alaska (eastern) |
| BEIGELAQIUSHAN | Cone of WUDALIANCHI | China (eastern) | |
| BEIHUOKOU | Cinder cone of KUNLUN VOLCANIC GROUP | China (western) | |
| BEJENADO | Stratovolcano of LA PALMA | Canary Islands | |
| BEKEL, GUNUNG | Dome of PENANGGUNGAN | Java | |
| BELAIA SOPKA | Synonym of ICHINSKY | Kamchatka Peninsula | |
| BELAYA | Synonym of GREAT SITKIN | Aleutian Islands | |
| BELENKAYA | Stratovolcano | Holocene | Kamchatka Peninsula |
| BELERANG, GUNUNG | Synonym of COLO [UNA UNA] | Sulawesi | |
| BELESME | Cone of ERCIYES DAGI | Turkey | |
| BELFOND | Dome of QUALIBOU | West Indies | |
| BELIANKIN | Stratovolcano of AKADEMIA NAUK | Kamchatka Peninsula | |
| BELIANKIN [BELYANKIN] | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| BELINDA, MOUNT | Cone of MONTAGU ISLAND | Antarctica & South Sandwich Islands | |
| BELIRANG | Crater of SUMBING | Sumatra | |
| BELIRANG | Caldera of SEKINCAU BELIRANG | Sumatra | |
| BELIRANG | Thermal Feature of HULUBELU | Sumatra | |
| BELIRANG, GUNUNG | Synonym of KUNYIT | Sumatra | |
| BELIRANG-BERITI | Compound volcano | Fumarolic | Sumatra |
| BELKNAP | Shield volcanoes | Radiocarbon | USA (Oregon) |
| BELLAIRE, VOLCA | Cone of OLOT VOLCANIC FIELD | Western Europe | |
| BELLAVISTA | Crater of CAMPI FLEGREI | Italy | |
| BELLAVISTA, CERRO | Cinder cone of CARRAN-LOS VENADOS | Central Chile & Argentina | |
| BELLAVISTA, LOMA | Cinder cone of LICTO | Ecuador | |
| BELLEVUE MOUNTAIN | Dome of DIABLES, MORNE AUX | West Indies | |
| BELLINGSHAUSEN ISLAND | Submarine vent of THULE ISLANDS | Antarctica & South Sandwich Islands | |
| BELLIZZI, CUDDIE | Vent of PANTELLERIA | Italy | |
| BELOW, MOUNT [MOUNT TALAWE] | Stratovolcano of LANGILA | New Britain | |
| BELU | Cone of INIERIE | Lesser Sunda Islands | |
| BELU, WAI | Thermal Feature of HULUBELU | Sumatra | |
| BELVEDERE | Crater of CAMPI FLEGREI | Italy | |
| BELVEDERE | Cone of ZITACUARO-VALLE DE BRAVO | México | |
| BELY | Shield volcanoes | Holocene? | Kamchatka Peninsula |
| BELYANKIN | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| BELYI | Synonym of BELY | Kamchatka Peninsula | |
| BEN LOMOND | Dome of MAROA | New Zealand | |
| BEN LOMOND | Dome of TAUPO | New Zealand | |
| BENBOW | Crater of AMBRYM | Vanuatu | |
| BENDA | Synonym of DAKATAUA | New Britain | |
| BENGO, CERRO | Cinder cone of APASTEPEQUE FIELD | El Salvador & Honduras | |
| BENI HILAL, HARRA | Synonym of BIRK, HARRAT AL | Arabia | |
| BENI MAIMUN | Crater of ARHAB, HARRA OF | Arabia | |
| BENI ZUBEIR | Crater of ARHAB, HARRA OF | Arabia | |
| BEPPU | Thermal Feature of TSURUMI | Ryukyu Islands & Kyushu | |
| BERAPI | Synonym of MARAPI | Sumatra | |
| BERAPI | Synonym of KERINCI | Sumatra | |
| BERAPI-ELOK | Crater of KERINCI | Sumatra | |
| BERCEK, KAWAH | Thermal Feature of KAMOJANG, KAWAH | Java | |
| BERESOWSKAJA | Synonym of KARYMSKY | Kamchatka Peninsula | |
| BEREZOVAIA SOPKA | Synonym of KARYMSKY | Kamchatka Peninsula | |
| BEREZOVY | Cinder cone of ZAVARITSKY | Kamchatka Peninsula | |
| BEREZOVY | Stratovolcano of MALY SEMIACHIK | Kamchatka Peninsula | |
| BERG | Somma volcano of KOLOKOL GROUP | Kuril Islands | |
| BERG ISI [JABAL EL-ESI] | Stratovolcano of DHAMAR, HARRAS OF | Arabia | |
| BERGHOLL | Shield volcano of REYKJANES | Iceland (southwestern) | |
| BERGJE | Dome of QUILL, THE | West Indies | |
| BERGVATNSARHRAUN | Crater Row of GRIMSVOTN | Iceland (northeastern) | |
| BERICCIO | Pumice cone of BORA-BERICCIO | Africa (northeastern) & Red Sea | |
| BERICHA | Stratovolcano of BOSET-BERICHA | Africa (northeastern) & Red Sea | |
| BERICHA | Synonym of BORA-BERICCIO | Africa (northeastern) & Red Sea | |
| BERING | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| BERITARIBI | Synonym of BERUTARUBE | Kuril Islands | |
| BERLIN | Pleistocene caldera of TECAPA | El Salvador & Honduras | |
| BERLIN | Shield volcanoes | Ar/Ar | Antarctica & South Sandwich Islands |
| BERLIN-TECAPA | Synonym of TECAPA | El Salvador & Honduras | |
| BERMEJA, MONTANA | Cone of FUERTEVENTURA | Canary Islands | |
| BERMEJA, MONTANA | Cone of LANZAROTE | Canary Islands | |
| BERNA | Cone of JAN MAYEN | Atlantic Ocean (Jan Mayen) | |
| BERNADSKOGO [VERNADSKIY] | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| BERRAZALES | Thermal Feature of GRAN CANARIA | Canary Islands | |
| BERRITARABENOBORI | Synonym of BERUTARUBE | Kuril Islands | |
| BERTI HILLS | Synonym of KUTUM VOLCANIC FIELD | Africa (northern) | |
| BERTJEK, KAWAH [KAWAH BERCEK] | Thermal Feature of KAMOJANG, KAWAH | Java | |
| BERU | Volcanic field | Holocene | Africa (northeastern) & Red Sea |
| BERUTARUBE | Stratovolcano | Holocene | Kuril Islands |
| BESAR | Stratovolcano ? | Historical | Sumatra |
| BESAR, KABA [LAMA, KABA] | Crater of KABA | Sumatra | |
| BESER | Stratovolcano of SUMBING | Java | |
| BESSIE BUTTE | Cone of NEWBERRY | USA (Oregon) | |
| BESYMYANNAYA | Synonym of BEZYMIANNY | Kamchatka Peninsula | |
| BETAFO | Cone of ANKARATRA FIELD | Indian Ocean (western) | |
| BEYONESU-RETUGAN | Synonym of BAYONNAISE ROCKS | Izu, Volcano, & Mariana Islands | |
| BEZYMIANNY | Stratovolcano | Historical | Kamchatka Peninsula |
| BEZYMJANNAJA SOPKA | Synonym of BEZYMIANNY | Kamchatka Peninsula | |
| BEZYMYANNAYA | Dome of UZON | Kamchatka Peninsula | |
| BEZYMYANNYI | Synonym of BEZYMIANNY | Kamchatka Peninsula | |
| BIAM | Synonym of BAM | Northeast of New Guinea | |
| BIAO, PICO | Synonym of SAN JOAQUIN | Africa (western) | |
| BIBI, GUNUNG | Cone of MERAPI | Java | |
| BIBINOI | Stratovolcanoes | Holocene | Halmahera |
| BICHBALICK [PECHAN] | Cone of TIANSHAN VOLCANIC GROUP | China (western) | |
| BIEI-DAKE | Stratovolcano of TOKACHI | Hokkaido | |
| BIEI-FUJI | Stratovolcano of TOKACHI | Hokkaido | |
| BIEM | Synonym of BAM | Northeast of New Guinea | |
| BIETE MENGEST | Tuff ring of BISHOFTU VOLCANIC FIELD | Africa (northeastern) & Red Sea | |
| BIG BEN | Stratovolcano of HEARD | Indian Ocean (southern) | |
| BIG BOMB CRATER | Cinder cone of DIAMOND CRATERS | USA (Oregon) | |
| BIG CINDER BUTTE | Cinder cone of CRATERS OF THE MOON | USA (Idaho) | |
| BIG CRATERS | Cone of CRATERS OF THE MOON | USA (Idaho) | |
| BIG GLASS MOUNTAIN [GLASS MOUNTAIN] | Dome of MEDICINE LAKE | USA (California) | |
| BIG GREEN HILL | Cinder cone of TRISTAN DA CUNHA | Atlantic Ocean (southern) | |
| BIG HILL | Cone of NEWER VOLCANICS PROV | Australia | |
| BIG JOHN | Former crater of WHITE ISLAND | New Zealand | |
| BIG LAVA BED CONE | Cinder cone of INDIAN HEAVEN | USA (Washington) | |
| BIG MT. WORRI | Cone of GARUA HARBOUR | New Britain | |
| BIG OBSIDIAN FLOW | Vent of NEWBERRY | USA (Oregon) | |
| BIG SAND BUTTE | Cone of MEDICINE LAKE | USA (California) | |
| BIHADI | Crater of BAYUDA VOLCANIC FIELD | Africa (northern) | |
| BIHIRAM | Cone of KARISIMBI | Africa (central) | |
| BIHUNDE | Cone of NYAMURAGIRA | Africa (central) | |
| BIJAGUA | Dome of TENORIO | Costa Rica | |
| BIJIASHAN | Cone of WUDALIANCHI | China (eastern) | |
| BIKIN PLATEAU VOLC FIELD | Fissure vent of SIKHOTE-ALIN | Russia (southeastern) | |
| BIL TEPE | Dome of ERCIYES DAGI | Turkey | |
| BILATE RIVER FIELD | Maars | Holocene | Africa (northeastern) & Red Sea |
| BILIBIN | Cone of VERNADSKII RIDGE | Kuril Islands | |
| BILIRAN | Compound volcano | Historical | Central Philippines |
| BILIUKAYA [BILYUKAI] | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| BILLY MITCHELL | Pyroclastic shield | Radiocarbon | Bougainville & Solomon Islands |
| BILMA, MONTAÑA | Cinder cone of TENERIFE | Canary Islands | |
| BILYUKAI | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| BILYUKAI | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| BINALIK | Maar of NUNIVAK ISLAND | Alaska (western) | |
| BINANGUNAN, MT. | Stratovolcano of AMBANG | Sulawesi | |
| BINDLOE | Synonym of MARCHENA | Galápagos Islands | |
| BINEM | Cone of DIENG VOLCANIC COMPLEX | Java | |
| BINGA | Dome of PACO | Mindanao | |
| BININTIANG MALAKI | Cone of TAAL | Luzon | |
| BININTIANG MALAQUI [BININTIANG MALAKI] | Cone of TAAL | Luzon | |
| BININTIANG MUNTI | Cone of TAAL | Luzon | |
| BINNA | Dome of JAN MAYEN | Atlantic Ocean (Jan Mayen) | |
| BINONE | Cinder cone of CAMIGUIN | Mindanao | |
| BINTACAN, MT. | Stratovolcano of BULUSAN | Luzon | |
| BINULUAN | Stratovolcano of AMBALATUNGAN GROUP | Luzon | |
| BIOKOS' | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| BIR ALI | Synonym of BAL HAF, HARRA OF | Arabia | |
| BIR BAHRAHUT (BIR BAHUT) | Synonym of BIR BORHUT | Arabia | |
| BIR BARHOUT (BIR BARHUT) | Synonym of BIR BORHUT | Arabia | |
| BIR BORHUT | Volcanic field | Holocene? | Arabia |
| BIRD MOUNTAIN | Shield volcano of INDIAN HEAVEN | USA (Washington) | |
| BIRD NEST ISLAND | Crater of CENTRAL ISLAND | Africa (eastern) | |
| BIRK, HARRAT AL | Volcanic field | Holocene | Arabia |
| BIRO-YAMA | Stratovolcano of AKUSEKI-JIMA | Ryukyu Islands & Kyushu | |
| BIRUA | Cone of VISOKE | Africa (central) | |
| BISAROQUES, VOLCA LES | Cone of OLOT VOLCANIC FIELD | Western Europe | |
| BISATI NDUBI | Cone of VISOKE | Africa (central) | |
| BISENTINA, ISOLA | Cone of VULSINI | Italy | |
| BISHAN WAKA | Pit crater of TEPI | Africa (northeastern) & Red Sea | |
| BISHOFTU HAYK | Tuff ring of BISHOFTU VOLCANIC FIELD | Africa (northeastern) & Red Sea | |
| BISHOFTU VOLCANIC FIELD | Fissure vents | Holocene | Africa (northeastern) & Red Sea |
| BISHUSHA | Cone of NYAMURAGIRA | Africa (central) | |
| BISMA | Cone of DIENG VOLCANIC COMPLEX | Java | |
| BISMARCK, LAGO | Maar of PALEI-AIKE VOLCANIC FIELD | Southern Chile & Argentina | |
| BISMO [BISMA] | Cone of DIENG VOLCANIC COMPLEX | Java | |
| BISOKE (BISOKO) | Synonym of VISOKE | Africa (central) | |
| BITINGAN, KAWAH | Crater of DIENG VOLCANIC COMPLEX | Java | |
| BITIVOGALA | Crater of SAVO | Bougainville & Solomon Islands | |
| BITJARA, LAKE | Maar of IBU | Halmahera | |
| BITUIN | Dome of PINATUBO | Luzon | |
| BIU PLATEAU | Volcanic field | Holocene? | Africa (western) |
| BIWA-IKE | Crater of KIRISHIMA | Ryukyu Islands & Kyushu | |
| BIWANOKUBA | Vent of UNZEN | Ryukyu Islands & Kyushu | |
| BJALLAGIGAR | Fissure vent of HEKLA | Iceland (southern) | |
| BJARNAREY | Cone of VESTMANNAEYJAR | Iceland (southern) | |
| BJARNARFELL | Cone of GEYSIR | Iceland (southwestern) | |
| BJARNARFLAG | Crater Row of KRAFLA | Iceland (northeastern) | |
| BJARNARGIGAR [BJARNARFLAG] | Crater Row of KRAFLA | Iceland (northeastern) | |
| BLACK BLUFFS | Tuff cone of ST. PAUL ISLAND | Alaska (western) | |
| BLACK BUTTE | Dome of SHASTA | USA (California) | |
| BLACK BUTTE [CINDER CONE] | Cinder cone of LASSEN VOLCANIC CENTER | USA (California) | |
| BLACK BUTTE CRATER | Shield volcano of SHOSHONE LAVA FIELD | USA (Idaho) | |
| BLACK BUTTES | Stratovolcano of BAKER | USA (Washington) | |
| BLACK CRATER | Dome of TECAPA | El Salvador & Honduras | |
| BLACK FOREST | Thermal Feature of EAST DIAMANTE | Izu, Volcano, & Mariana Islands | |
| BLACK HILL | Cone of NEWER VOLCANICS PROV | Australia | |
| BLACK KNOLL | Cinder cone of BALD KNOLL | USA (Utah) | |
| BLACK MOUNTAIN | Synonym of MERU | Africa (eastern) | |
| BLACK MOUNTAIN | Cone of MEDICINE LAKE | USA (California) | |
| BLACK PEAK | Synonym of VENIAMINOF | Alaska Peninsula | |
| BLACK PEAK | Stratovolcano | Radiocarbon | Alaska Peninsula |
| BLACK POINT | Cone of MONO LAKE VOLCANIC FIELD | USA (California) | |
| BLACK ROCK DESERT | Volcanic field | Radiocarbon | USA (Utah) |
| BLACK ROCK VOLCANO | Cone of BLACK ROCK DESERT | USA (Utah) | |
| BLACK TOP BUTTE | Cone of CRATERS OF THE MOON | USA (Idaho) | |
| BLACK TUSK, THE | Stratovolcano of GARIBALDI LAKE | Canada | |
| BLACKFLY TUYA | Tuya of TUYA VOLCANIC FIELD | Canada | |
| BLACKWOOD, MT. | Cone of NEWER VOLCANICS PROV | Australia | |
| BLAHNUKUR | Tuya of TORFAJOKULL | Iceland (southern) | |
| BLAKISTON | Synonym of TAO-RUSYR CALDERA | Kuril Islands | |
| BLANCA | Maar of MICHOACAN-GUANAJUATO | México | |
| BLANCA, CALDERA | Crater of LANZAROTE | Canary Islands | |
| BLANCA, MONTANA | Fissure vent of TENERIFE | Canary Islands | |
| BLANCA, MONTANA | Cone of LANZAROTE | Canary Islands | |
| BLANCAS, CALDERAS | Cone of FUERTEVENTURA | Canary Islands | |
| BLANCAS, LOMAS | Stratovolcano | Holocene | Central Chile & Argentina |
| BLANCHE BAY | Synonym of RABAUL | New Britain | |
| BLANCHE CRATER | Cinder cone of SHOSHONE LAVA FIELD | USA (Idaho) | |
| BLANCO DEL ROBLEDO, CERR0 | Dome of ROBLEDO | Northern Chile, Bolivia & Argentina | |
| BLANCO, CERRO | Shield volcano of MICHOACAN-GUANAJUATO | México | |
| BLANCO, CERRO | Thermal Feature of APANECA RANGE | El Salvador & Honduras | |
| BLANCO, CERRO | Stratovolcano of CHILLAN, NEVADOS DE | Central Chile & Argentina | |
| BLAUFDEL [BURFELL I OLFUSI] | Shield volcano of HENGILL | Iceland (southwestern) | |
| BLERANG-BERITI | Synonym of BELIRANG-BERITI | Sumatra | |
| BLIZHNAYA PLOSKAYA [KRESTOVSKY] | Stratovolcano of USHKOVSKY | Kamchatka Peninsula | |
| BLIZHNY PLOSKI [KRESTOVSKY] | Stratovolcano of USHKOVSKY | Kamchatka Peninsula | |
| BLIZNETS | Stratovolcano | Holocene? | Kamchatka Peninsula |
| BLIZNETSY | Lava cone | Radiocarbon | Kamchatka Peninsula |
| BLOCKY CONE | Cone of ANIAKCHAK | Alaska Peninsula | |
| BLOSSEVILLE ISLAND | Synonym of KADOVAR | Northeast of New Guinea | |
| BLOWOUTS, THE | Vent of DEVILS GARDEN | USA (Oregon) | |
| BLUE LAKE | Crater of TONGARIRO | New Zealand | |
| BLUE LAKE | Crater of RAOUL ISLAND | Kermadec Islands | |
| BLUE LAKE | Tuff ring of NEWER VOLCANICS PROV | Australia | |
| BLUE LAKE CRATER | Maar | Radiocarbon | USA (Oregon) |
| BLUE MOUNTAIN | Dome of NEWER VOLCANICS PROV | Australia | |
| BLUE, VOLCAN | Synonym of AZUL, VOLCAN | Nicaragua | |
| BLUFF, THE | Cone of NEWER VOLCANICS PROV | Australia | |
| BLUMBANG | Dome of MURIA | Java | |
| BLUP BLUP | Stratovolcano | Holocene | Northeast of New Guinea |
| BM-CALDERA | Pleistocene caldera of SANTORINI | Greece | |
| BO-SHAN | Synonym of WUDALIANCHI | China (eastern) | |
| BOAT COVE | Synonym of RAOUL ISLAND | Kermadec Islands | |
| BOBADILLA, CRATER | Cone of MAULE, LAGUNA DEL | Central Chile & Argentina | |
| BOBAOMBY | Cone of AMBRE-BOBAOMBY | Indian Ocean (western) | |
| BOBO | Thermal Feature of INIERIE | Lesser Sunda Islands | |
| BOBOPAJO | Caldera of JAILOLO | Halmahera | |
| BOBROF | Stratovolcano | Holocene? | Aleutian Islands |
| BOCA CANGREJO | Cinder cone of TENERIFE | Canary Islands | |
| BOCA TRONADORA | Fissure vent of SAN SALVADOR | El Salvador & Honduras | |
| BOCAS DE FOGO | Vent of PICO | Azores | |
| BOCAS MARIE | Crater of TENERIFE | Canary Islands | |
| BOCCA DEL VIULO | Vent of VESUVIUS | Italy | |
| BOCCA GRANDE | Crater of CUMBAL | Colombia | |
| BOCCA NUOVA | Crater of ETNA | Italy | |
| BOCHAROVA ? | Synonym of UGASHIK-PEULIK | Alaska Peninsula | |
| BODE AMEDA HAYK | Crater of BILATE RIVER FIELD | Africa (northeastern) & Red Sea | |
| BOEAL BOEALI | Synonym of SIBUALBUALI | Sumatra | |
| BOEDOEGASOE, GUNUNG [GUNUNG BUDUGASU] | Cone of ARJUNO-WELIRANG | Java | |
| BOEKIT | See proper name (e.g. DAWON, BOEKIT) | Dutch spelling of Indonesian word for HILL | |
| BOEKITDAOEN | Synonym of DAUN, BUKIT | Sumatra | |
| BOELIRAN, KAWAH [KAWAH BULIRAN] | Thermal Feature of KAMOJANG, KAWAH | Java | |
| BOENDER [BUNDER] | Cone of BATUR | Lesser Sunda Islands | |
| BOER | See proper name (e.g. MOETELONG, BOER) | Dutch spelling of Indonesian word for HILL | |
| BOETAK [BUTAK] | Cone of DIENG VOLCANIC COMPLEX | Java | |
| BOETAK PETARANGAN [BUTAK PETARANGAN] | Cone of DIENG VOLCANIC COMPLEX | Java | |
| BOETAK, GUNUNG [GUNUNG BUTAK] | Cone of ARJUNO-WELIRANG | Java | |
| BOGANA | Synonym of BAGANA | Bougainville & Solomon Islands | |
| BOGATYR RIDGE | Stratovolcano | Holocene | Kuril Islands |
| BOGDAN KHMELNITSKII | Stratovolcano of CHIRIP | Kuril Islands | |
| BOGDANOVICH | Crater of VERNADSKII RIDGE | Kuril Islands | |
| BOGDANOVICH | Shield volcano of VYSOKY | Kamchatka Peninsula | |
| BOGGEL | Cone of PRINCE EDWARD ISLAND | Indian Ocean (southern) | |
| BOGO-TOGO-ULA [BAGA TOGO UUL] | Cinder cone of KHANUY GOL | Mongolia | |
| BOGORIA | Shield volcano | Pleistocene-Geysers | Africa (eastern) |
| BOGOSLOF | Submarine volcano | Historical | Aleutian Islands |
| BOGOSLOF HILL | Shield volcano of ST. PAUL ISLAND | Alaska (western) | |
| BOGOUSAR | Pyroclastic Cone of GHEGAM RIDGE | Caucasus, Georgia & Armenia | |
| BOI | Synonym of CENTRAL ISLAND | Africa (eastern) | |
| BOI, PICO DO | Cone of SETE CIDADES | Azores | |
| BOILING LAKE | Thermal Feature of WATT, MORNE | West Indies | |
| BOILING SPRINGS LAKE | Thermal Feature of LASSEN VOLCANIC CENTER | USA (California) | |
| BOINA | Cone of DABBAHU | Africa (northeastern) & Red Sea | |
| BOINA | Cone of DABBAHU | Africa (northeastern) & Red Sea | |
| BOINA | Fumarole field | Pleistocene-Fumarolic | Africa (northeastern) & Red Sea |
| BOIS D'INDE FRANCIOU | Dome of QUALIBOU | West Indies | |
| BOIS D'INDIE | Dome of PLAT PAYS, MORNE | West Indies | |
| BOISA | Stratovolcano | Holocene? | Northeast of New Guinea |
| BOKI, WOLO | Crater of INIELIKA | Lesser Sunda Islands | |
| BOKKI | Crater Row of TUNGNAFELLSJOKULL | Iceland (northeastern) | |
| BOKLUCA | Cone of ERCIYES DAGI | Turkey | |
| BOKOVOI | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| BOLA | Stratovolcano | Holocene | New Britain |
| BOLETAS, CERRO | Dome of VALLES CALDERA | USA (New Mexico) | |
| BOLICHE | Dome of CHACANA | Ecuador | |
| BOLIN | Synonym of ILIBOLENG | Lesser Sunda Islands | |
| BOLJSHAIA UDINA [BOLSHAYA UDINA] | Stratovolcano of UDINA | Kamchatka Peninsula | |
| BOLJSHOY [BOLSHOI] | Shield volcano of BOLSHOI-KEKUKNAYSKY | Kamchatka Peninsula | |
| BOLLONS ISLAND | Cone of ANTIPODES ISLAND | Pacific Ocean (southern) | |
| BOLSA, CERRO LA | Cinder cone of ZITACUARO-VALLE DE BRAVO | México | |
| BOLSA, CERRO LA | Cinder cone of NAOLINCO VOLCANIC FIELD | México | |
| BOLSENA | Pleistocene caldera of VULSINI | Italy | |
| BOLSHAYA PLOSKY [DALJNY PLOSKY] | Shield volcano of USHKOVSKY | Kamchatka Peninsula | |
| BOLSHAYA UDINA | Stratovolcano of UDINA | Kamchatka Peninsula | |
| BOLSHE-BANNAYA | Lava domes | Holocene | Kamchatka Peninsula |
| BOLSHOI | Shield volcano of BOLSHOI-KEKUKNAYSKY | Kamchatka Peninsula | |
| BOLSHOI DOME | Dome of ANIAKCHAK | Alaska Peninsula | |
| BOLSHOI PAYALPAN | Shield volcanoes | Holocene? | Kamchatka Peninsula |
| BOLSHOI SEMIACHIK | Synonym of MALY SEMIACHIK | Kamchatka Peninsula | |
| BOLSHOI SEMIACHIK | Stratovolcanoes | Radiocarbon | Kamchatka Peninsula |
| BOLSHOI SITKIN | Synonym of GREAT SITKIN | Aleutian Islands | |
| BOLSHOI-KEKUKNAYSKY | Shield volcanoes | Radiocarbon | Kamchatka Peninsula |
| BOLSHOY PAYALPAN | Synonym of BOLSHOI PAYALPAN | Kamchatka Peninsula | |
| BOL'SHOY SEMYACHIK | Synonym of BOLSHOI SEMIACHIK | Kamchatka Peninsula | |
| BOLSHOY-KEKUKNAYSKY | Synonym of BOLSHOI-KEKUKNAYSKY | Kamchatka Peninsula | |
| BOLUDO | Cinder cone of CHICHINAUTZIN | México | |
| BOMB PEAK | Cone of EREBUS | Antarctica & South Sandwich Islands | |
| BOMBALAI | Pyroclastic cone | Holocene? | Borneo |
| BOMBARDA | Pumice cone of MILOS | Greece | |
| BOMBELLESTOPPEN | Dome of JAN MAYEN | Atlantic Ocean (Jan Mayen) | |
| BOMBON, LAKE | Synonym of TAAL | Luzon | |
| BONA-CHURCHILL | Synonym of CHURCHILL | Alaska (eastern) | |
| BONACCORSI-MONTARELLO | Cinder cone of ETNA | Italy | |
| BONDE | Cone of KARISIMBI | Africa (central) | |
| BONDHOLSHRAUN | Shield volcano of KRAFLA | Iceland (northeastern) | |
| BONETE DE CARRAO | Cone of ESTELI | Nicaragua | |
| BONETE, CERRO EL | Stratovolcano of MOYUTA | Guatemala | |
| BONGKOK, BUKIT | Cone of BATUR | Lesser Sunda Islands | |
| BONGOLE, GOF | Maar of MARSABIT | Africa (eastern) | |
| BONGSU, KEPUNDAN | Crater of MARAPI | Sumatra | |
| BONIN, MORNE | Dome of QUALIBOU | West Indies | |
| BONITA BUTTE | Cone of MEDICINE LAKE | USA (California) | |
| BONITA, LOMA | Dome of ZITACUARO-VALLE DE BRAVO | México | |
| BONNET, LE | Crater of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| BONO | Crater of UMBOI | Northeast of New Guinea | |
| BONSULTON, CUDDIE | Vent of PANTELLERIA | Italy | |
| BOOBY HILL | Dome of SABA | West Indies | |
| BOOMERANG SEAMOUNT | Submarine volcano | Historical | Indian Ocean (southern) |
| BOOSER | Maar of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| BOOT ROCK | Tuff cone of MARION ISLAND | Indian Ocean (southern) | |
| BOQUERON, AUSOLES EL | Thermal Feature of CHINAMECA | El Salvador & Honduras | |
| BOQUERON, EL | Synonym of BARCENA | México | |
| BOQUERON, EL | Stratovolcano of SAN SALVADOR | El Salvador & Honduras | |
| BOQUERON, EL | Dome of TENERIFE | Canary Islands | |
| BOQUERONCITO | Cinder cone of SAN SALVADOR | El Salvador & Honduras | |
| BOQUERONCITOS | Fissure vent of SAN SALVADOR | El Salvador & Honduras | |
| BOR GHELEBA | Synonym of CENTRAL ISLAND | Africa (eastern) | |
| BOR-ELI | Synonym of BORALE ALE | Africa (northeastern) & Red Sea | |
| BORA | Pumice cone of BORA-BERICCIO | Africa (northeastern) & Red Sea | |
| BORA-BERICCIO | Pumice cones | Holocene | Africa (northeastern) & Red Sea |
| BORALE ALE | Stratovolcano | Holocene | Africa (northeastern) & Red Sea |
| BORAULE | Synonym of BORAWLI | Africa (northeastern) & Red Sea | |
| BORAWLI | Stratovolcano | Holocene | Africa (northeastern) & Red Sea |
| BORAWLI | Lava domes | Holocene | Africa (northeastern) & Red Sea |
| BORDER MOUNTAIN | Cone of MEDICINE LAKE | USA (California) | |
| BORELE-ALI | Synonym of BORALE ALE | Africa (northeastern) & Red Sea | |
| BORGAHRAUN | Fissure vent of THEISTAREYKJARBUNGA | Iceland (northeastern) | |
| BORGARHOLAR | Cone of GRIMSNES | Iceland (southwestern) | |
| BORGARHRAUN | Crater Row of REYKJANES | Iceland (southwestern) | |
| BORIATIKO VOUNO | Dome of NISYROS | Greece | |
| BORIQUEN | Thermal Feature of RINCON DE LA VIEJA | Costa Rica | |
| BORISYAK, MT. | Cone of LOMONOSOV GROUP | Kuril Islands | |
| BORO, GOF | Maar of MARSABIT | Africa (eastern) | |
| BORREGO, CERRO EL | Cinder cone of MICHOACAN-GUANAJUATO | México | |
| BORT | Stratovolcano of BOLSHOI SEMIACHIK | Kamchatka Peninsula | |
| BORTOVAYA | Dome of UZON | Kamchatka Peninsula | |
| BORY | Crater of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| BORZOV | Cone of KOLOKOL GROUP | Kuril Islands | |
| BOSCHAN [PECHAN] | Cone of TIANSHAN VOLCANIC GROUP | China (western) | |
| BOSCO DEI CONTI | Cone of ISCHIA | Italy | |
| BOSCO DELLA MADDALENA | Stratovolcano of ISCHIA | Italy | |
| BOSET | Stratovolcano of BOSET-BERICHA | Africa (northeastern) & Red Sea | |
| BOSET-BERICHA | Stratovolcanoes | Holocene | Africa (northeastern) & Red Sea |
| BOSETI-BARICCIA | Synonym of BOSET-BERICHA | Africa (northeastern) & Red Sea | |
| BOSETI-BERICCIA [BERICHA] | Stratovolcano of BOSET-BERICHA | Africa (northeastern) & Red Sea | |
| BOSETI-GUDDA [BOSET] | Stratovolcano of BOSET-BERICHA | Africa (northeastern) & Red Sea | |
| BOSOTLAN | Synonym of SAN MIGUEL | El Salvador & Honduras | |
| BOSQUE ALEGRE | Maar of POAS | Costa Rica | |
| BOSQUE, EL | Dome of ROTA | Nicaragua | |
| BOTIJA, MONTANA LA | Cinder cone of TENERIFE | Canary Islands | |
| BOTNA-SKYRTUNNA | Cone of LJOSUFJOLL | Iceland (western) | |
| BOTNAHRAUN | Fissure vent of GRIMSVOTN | Iceland (northeastern) | |
| BOTNAHRAUN | Fissure vent of ASKJA | Iceland (northeastern) | |
| BOTOS | Stratovolcano of POAS | Costa Rica | |
| BOTOS, LOS | Synonym of POAS | Costa Rica | |
| BOTTOM HILL | Dome of SABA | West Indies | |
| BOUILLANTE CHAIN | Maars | Pleistocene-Hot Springs | West Indies |
| BOUVET | Shield volcano | Magnetism | Atlantic Ocean (southern) |
| BOUVETOYA | Synonym of BOUVET | Atlantic Ocean (southern) | |
| BOVE, VALLE DEL | Caldera of ETNA | Italy | |
| BOVEN | Stratovolcano of QUILL, THE | West Indies | |
| BOWERS KNOLL | Cone of MARKAGUNT PLATEAU | USA (Utah) | |
| BOYNA | Synonym of DABBAHU | Africa (northeastern) & Red Sea | |
| BOZ DAG | Cone of ERCIYES DAGI | Turkey | |
| BOZ DAG | Cone of ERCIYES DAGI | Turkey | |
| BOZU-JIGOKU | Thermal Feature of TSURUMI | Ryukyu Islands & Kyushu | |
| BRAMA [BROMO] | Cinder cone of TENGGER CALDERA | Java | |
| BRANCA, CALDEIRA | Maar of FLORES | Azores | |
| BRANCA, CALDERA | Pleistocene caldera of KARISIMBI | Africa (central) | |
| BRANCA, MONT | Cone of POSSESSION, ILE DE LA | Indian Ocean (southern) | |
| BRANCO, PICO | Dome of TRINDADE | Atlantic Ocean (central) | |
| BRANDUR | Cone of VESTMANNAEYJAR | Iceland (southern) | |
| BRASIL, CERRO | Cinder cone of CUILAPA-BARBARENA | Guatemala | |
| BRASIL, MONTE | Cone of TERCEIRA | Azores | |
| BRAT CHIRPOEV | Stratovolcano of CHIRPOI | Kuril Islands | |
| BRATAN | Caldera | Holocene | Lesser Sunda Islands |
| BRAUN [VON SEEBACH] | Cone of RINCON DE LA VIEJA | Costa Rica | |
| BRAVA | Stratovolcano | Holocene | Cape Verde Islands |
| BRAVARD | Synonym of TUPUNGATITO | Central Chile & Argentina | |
| BRAVAS, LAGUNAS | Synonym of NEVADA, SIERRA | Northern Chile, Bolivia & Argentina | |
| BRAVO, CERRO | Stratovolcano | Radiocarbon | Colombia |
| BREDES, PITON | Cinder cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| BRENA, LA | Maar of DURANGO VOLCANIC FIELD | México | |
| BRENAL | Synonym of DURANGO VOLCANIC FIELD | México | |
| BRENNISTEINSFJOLL | Crater rows | Historical | Iceland (southwestern) |
| BRENNISTEINSGIGAR | Synonym of BRENNISTEINSFJOLL | Iceland (southwestern) | |
| BREW, MOUNT | Vent of GARIBALDI LAKE | Canada | |
| BRIDGE RIVER CONES | Volcanic field | Holocene | Canada |
| BRIDGE RIVER VENT | Vent of MEAGER | Canada | |
| BRIDGEMAN ISLAND | Stratovolcano | Uncertain | Antarctica & South Sandwich Islands |
| BRIDGMAN ISLAND | Synonym of BRIDGEMAN ISLAND | Antarctica & South Sandwich Islands | |
| BRILLANTES, MONTAGNAS | Synonym of ILIAMNA | Alaska (southwestern) | |
| BRIMSTONE HILL | Dome of LIAMUIGA | West Indies | |
| BRIMSTONE PIT | Crater of NW ROTA-1 | Izu, Volcano, & Mariana Islands | |
| BRINCO DEL DIABLO, CERRO | Shield volcano of MICHOACAN-GUANAJUATO | México | |
| BRISTOL ISLAND | Stratovolcano | Historical | Antarctica & South Sandwich Islands |
| BRITO, CERRO DE | Cinder cone of CUILAPA-BARBARENA | Guatemala | |
| BROADLANDS | Thermal Feature of REPOROA | New Zealand | |
| BROCKMAN FLAT | Synonym of EAGLE LAKE FIELD | USA (California) | |
| BROKEN BACK | Crater of CARRIZOZO | USA (New Mexico) | |
| BROKEN ISLAND | Crater of CENTRAL ISLAND | Africa (eastern) | |
| BROKEN TOP | Cone of CRATERS OF THE MOON | USA (Idaho) | |
| BROKEOFF MOUNTAIN | Stratovolcano of LASSEN VOLCANIC CENTER | USA (California) | |
| BROMO | Cinder cone of TENGGER CALDERA | Java | |
| BROMO-TENGGER CALDERA | Synonym of TENGGER CALDERA | Java | |
| BROTHERS | Submarine volcano | Fumarolic | New Zealand |
| BROUTON CALDERA | Caldera of URATAMAN | Kuril Islands | |
| BROWN PEAK | Synonym of STURGE ISLAND | Antarctica & South Sandwich Islands | |
| BROWN'S ISLAND [MOTUKOREA] | Cone of AUCKLAND FIELD | New Zealand | |
| BRUCE | Cone of SEAL NUNATAKS GROUP | Antarctica & South Sandwich Islands | |
| BRUCIATA, CUDDIA | Cone of PANTELLERIA | Italy | |
| BRUCK | Crater of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| BRUJA, LOMA LA | Dome of SAN CRISTOBAL | Nicaragua | |
| BRUJILLO, CERRO | Lava cone of IXTEPEQUE | Guatemala | |
| BRUJO, CERRO | Tuff cone of SAN CRISTOBAL | Galápagos Islands | |
| BRUJO, CERRO EL | Shield volcano of SERDAN-ORIENTAL | México | |
| BRUJO, EL | Vent of SANTA MARIA | Guatemala | |
| BRULANT | Crater of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| BRULES, MORNE | Dome of DIABLES, MORNE AUX | West Indies | |
| BRULOT | Cone of AMSTERDAM ISLAND | Indian Ocean (southern) | |
| BRUNABORG [HROSSADALIUR] | Crater Row of KRAFLA | Iceland (northeastern) | |
| BRUNAGIGIR | Crater Row of BRENNISTEINSFJOLL | Iceland (southwestern) | |
| BRUSHY BUTTE | Shield volcano | Holocene? | USA (California) |
| BRYDJUHRAUN | Fissure vent of BARDARBUNGA | Iceland (northeastern) | |
| BRYTALAEKIR | Fissure vent of KATLA | Iceland (southern) | |
| BU JERMAN | Shield volcano of HAUT DONG NAI | Southeast Asia | |
| BU KONG RONG | Caldera of HAUT DONG NAI | Southeast Asia | |
| BU-CALDERA | Pleistocene caldera of SANTORINI | Greece | |
| BUAL BUALI | Synonym of SIBUALBUALI | Sumatra | |
| BUBAY, MT. | Cone of SAN PABLO VOLCANIC FIELD | Luzon | |
| BUBOCHKA | Cinder cone of TOLBACHIK | Kamchatka Peninsula | |
| BUCK BUTTE | Cone of MEDICINE LAKE | USA (California) | |
| BUCK HILL | Cone of WELLS GRAY-CLEARWATER | Canada | |
| BUCK KNOLL | Cinder cone of BALD KNOLL | USA (Utah) | |
| BUCKHORN LAKE | Cinder cone of SILVER LAKE | USA (California) | |
| BUCKLE ISLAND | Stratovolcano | Historical | Antarctica & South Sandwich Islands |
| BUCU, GUNUNG | Cone of DIENG VOLCANIC COMPLEX | Java | |
| BUD DAJO | Cinder cone of JOLO | Sulu Islands | |
| BUDAKLETTUR | Cone of SNAEFELLSJOKULL | Iceland (western) | |
| BUDAMADO HAYK | Crater of BILATE RIVER FIELD | Africa (northeastern) & Red Sea | |
| BUDDAJO [BUD DAJO] | Cinder cone of JOLO | Sulu Islands | |
| BUDUGASU, GUNUNG | Cone of ARJUNO-WELIRANG | Java | |
| BUENA VISTA, CERRO | Cinder cone of MOYUTA | Guatemala | |
| BUENA VISTA, CERRO | Dome of ILOPANGO | El Salvador & Honduras | |
| BUENAVENTURA SPRING | Thermal Feature of BANAHAW | Luzon | |
| BUENAVISTA | Vent of IZTACCIHUATL | México | |
| BUENAVISTA TOMATLAN, CERRO | Shield volcano of MICHOACAN-GUANAJUATO | México | |
| BUENOS AIRES | Cinder cone of PLATANAR | Costa Rica | |
| BUEY, CRATER DEL | Crater of MOCHO-CHOSHUENCO | Central Chile & Argentina | |
| BUEY, LAGUNA LA | Crater of PURACE | Colombia | |
| BUEYES, CERRO DE LOS | Cinder cone of CUILAPA-BARBARENA | Guatemala | |
| BUFUMBIRA | Cinder cones | Holocene? | Africa (central) |
| BUG ISLAND | Crater of CENTRAL ISLAND | Africa (eastern) | |
| BUGESHI | Cone of KARISIMBI | Africa (central) | |
| BUGOGO | Cone of NYIRAGONGO | Africa (central) | |
| BUGUMBA | Tuff cone of FORT PORTAL | Africa (central) | |
| BUGWAYE | Crater of BUNYARUGURU | Africa (central) | |
| BUHANGIN | Dome of PACO | Mindanao | |
| BUHARA | Tuff cone of FORT PORTAL | Africa (central) | |
| BUHI | Synonym of MALINAO | Luzon | |
| BUHO | Dome of BANAHAW | Luzon | |
| BUHUBIE | Cone of NYAMURAGIRA | Africa (central) | |
| BUHUMA | Cone of NYIRAGONGO | Africa (central) | |
| BUKIT | See proper name (e.g. DAUN, BUKIT) | Indonesian for HILL, MT. | |
| BUKOLI | Cone of NYAMURAGIRA | Africa (central) | |
| BULA | Synonym of BOLA | New Britain | |
| BULAL VOLC FIELD | Synonym of MEGA BASALT FIELD | Africa (northeastern) & Red Sea | |
| BULALO, MT. | Cone of SAN PABLO VOLCANIC FIELD | Luzon | |
| BULDIR | Stratovolcano | Holocene? | Aleutian Islands |
| BULENGIRA | Cone of KARISIMBI | Africa (central) | |
| BULENGO | Cone of NYIRAGONGO | Africa (central) | |
| BULGAN VOLC FIELD | Synonym of KHANUY GOL | Mongolia | |
| BULIENMERRI, LAKE | Tuff ring of NEWER VOLCANICS PROV | Australia | |
| BULIRAN, KAWAH | Thermal Feature of KAMOJANG, KAWAH | Java | |
| BULKA | Dome of AVACHINSKY | Kamchatka Peninsula | |
| BULL | Cone of SEAL NUNATAKS GROUP | Antarctica & South Sandwich Islands | |
| BULLAROOK HILL | Cone of NEWER VOLCANICS PROV | Australia | |
| BULLENGAROOK, MT. | Cone of NEWER VOLCANICS PROV | Australia | |
| BULOCHKA | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| BULU | Synonym of BOLA | New Britain | |
| BULU [GULU] | Cone of LANGILA | New Britain | |
| BULUMORSUM | Cone of ST. ANDREW STRAIT | Admiralty Islands | |
| BULUSAN | Stratovolcanoes | Historical | Luzon |
| BUMABAG | Stratovolcano of AMBALATUNGAN GROUP | Luzon | |
| BUMPASS HELL | Thermal Feature of LASSEN VOLCANIC CENTER | USA (California) | |
| BUMPASS MOUNTAIN | Dome of LASSEN VOLCANIC CENTER | USA (California) | |
| BUNAGA [CERISY PEAK] | Stratovolcano of LONG ISLAND | Northeast of New Guinea | |
| BUNANYA | Shield volcano of UKSICHAN | Kamchatka Peninsula | |
| BUNANYA | Shield volcano of KEKURNY | Kamchatka Peninsula | |
| BUNBULAN | Crater of BATUR | Lesser Sunda Islands | |
| BUNBULAN, GUNUNG | Dome of BATUR | Lesser Sunda Islands | |
| BUNDER | Cone of BATUR | Lesser Sunda Islands | |
| BUNDJULI | Cone of KARISIMBI | Africa (central) | |
| BUNGBRUNG | Crater of PAPANDAYAN | Java | |
| BUNGSU, KAPUNDAN [KEPUNDAN BUNGSU] | Crater of MARAPI | Sumatra | |
| BUNINYONG, MT. | Cone of NEWER VOLCANICS PROV | Australia | |
| BUNKER HILL | Dome of SABA | West Indies | |
| BUNNELL BUTTE | Cinder cone of ADAMS | USA (Washington) | |
| BUNOT, LAKE | Maar of SAN PABLO VOLCANIC FIELD | Luzon | |
| BUNTAK, BUKIT | Cone of KERINCI | Sumatra | |
| BUNTUK GEDE, GUNUNG | Vent of SUNDORO | Java | |
| BUNUHOLAR | Fissure vent of GRIMSVOTN | Iceland (northeastern) | |
| BUNYAMPAKA [KASENYI] | Tuff cone of KATWE-KIKORONGO | Africa (central) | |
| BUNYARO | Cone of VISOKE | Africa (central) | |
| BUNYARUGURU | Maars | Holocene | Africa (central) |
| BUNYOGWE | Cone of KARISIMBI | Africa (central) | |
| BUNYOKE | Cone of VISOKE | Africa (central) | |
| BUR | See proper name (e.g. TELONG, BUR NI) | Indonesian for HILL, MT. | |
| BURACO, PICO DO | Dome of FURNAS | Azores | |
| BURAK | Crater of LEROBOLENG | Lesser Sunda Islands | |
| BURAUEN | Synonym of MAHAGNAO | Central Philippines | |
| BURAYA | Cinder cone of TOLBACHIK | Kamchatka Peninsula | |
| BUREVESTNIK | Cone of BOGATYR RIDGE | Kuril Islands | |
| BURFELL | Crater Row of KRISUVIK | Iceland (southwestern) | |
| BURFELL I OLFUSI | Shield volcano of HENGILL | Iceland (southwestern) | |
| BURFELLSHRAUN | Fissure vent of BARDARBUNGA | Iceland (northeastern) | |
| BURILAN | Cone of GAUA | Vanuatu | |
| BURLIASTCHY [BURLYASHCHY] | Stratovolcano of BOLSHOI SEMIACHIK | Kamchatka Peninsula | |
| BURLICH | Tuff cone of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| BURLOW HILL | Dome of MERU | Africa (eastern) | |
| BURLYASHCHY | Stratovolcano of BOLSHOI SEMIACHIK | Kamchatka Peninsula | |
| BURNEY, MONTE | Stratovolcano | Historical | Southern Chile & Argentina |
| BURNING MOUNTAIN | Synonym of ILIAMNA | Alaska (southwestern) | |
| BURNING VOLCANO | Synonym of GARELOI | Aleutian Islands | |
| BURNT LAVA FLOW | Cone of MEDICINE LAKE | USA (California) | |
| BURNT MOUNTAIN | Synonym of REDOUBT | Alaska (southwestern) | |
| BURNTHILL | Cinder cone of TRISTAN DA CUNHA | Atlantic Ocean (southern) | |
| BURR, MT. | Cone of NEWER VOLCANICS PROV | Australia | |
| BURRO, CERRO EL | Dome of MICHOACAN-GUANAJUATO | México | |
| BURRU, DOINYO | Synonym of EBURRU, OL DOINYO | Africa (eastern) | |
| BURU | Caldera of PAGO | New Britain | |
| BURU, DOINYO | Synonym of EBURRU, OL DOINYO | Africa (eastern) | |
| BUS-OBO | Cinder cone | Holocene? | Mongolia |
| BUSHENYE | Cone of NYIRAGONGO | Africa (central) | |
| BUSHWAGA | Cone of NYIRAGONGO | Africa (central) | |
| BUTAJIRI-SILTI FIELD | Fissure vents | Holocene | Africa (northeastern) & Red Sea |
| BUTAK | Cone of DIENG VOLCANIC COMPLEX | Java | |
| BUTAK PETARANGAN | Cone of DIENG VOLCANIC COMPLEX | Java | |
| BUTAK, GUNUNG | Cone of ARJUNO-WELIRANG | Java | |
| BUTAKA | Cone of KARISIMBI | Africa (central) | |
| BUTAY, MT. | Stratovolcano of CAMIGUIN | Mindanao | |
| BUTLER'S MOUNTAIN | Dome of NEVIS PEAK | West Indies | |
| BUTTON HILL | Dome of MERU | Africa (eastern) | |
| BUTUBUT, MT. | Cone of KUWAE | Vanuatu | |
| BUTUS, GUNUNG | Cone of BATUR | Lesser Sunda Islands | |
| BUYAN-BRATAN | Synonym of BRATAN | Lesser Sunda Islands | |
| BUYUK AGRI DAGI | Synonym of ARARAT | Turkey | |
| BUYUK KIZIL TEPE | Cone of ERCIYES DAGI | Turkey | |
| BUYUKKALE TEPE | Dome of ERCIYES DAGI | Turkey | |
| BUZZ | Synonym of CENTRAL ISLAND | Africa (eastern) | |
| BUZZARD CREEK | Tuff rings | Radiocarbon | Alaska (eastern) |
| BWASI-IAI-IAI | Thermal Feature of DAWSON STRAIT GROUP | New Guinea & D'Entrecasteaux Islands | |
| BYAKUSHI-IKE | Crater of KIRISHIMA | Ryukyu Islands & Kyushu | |
| BYAKUSI-IKE [BYAKUSHI-IKE] | Crater of KIRISHIMA | Ryukyu Islands & Kyushu | |
| BYLANDT RHEYT | Cone of JAN MAYEN | Atlantic Ocean (Jan Mayen) | |
| BYLINKINA | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| BYLINKINOY [BYLINKINA] | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| BYOBU-DAKE | Stratovolcano of ZAO | Honshu | |
| CAANOAN | Cone of CAMIGUIN DE BABUYANES | North of Luzon | |
| CABALIAN | Stratovolcano | Radiocarbon | Central Philippines |
| CABALLITO | Cinder cone of CHICHINAUTZIN | México | |
| CABEZA DE VACA | Cone of CAYUTUE-LA VIGUERIA | Southern Chile & Argentina | |
| CABEZA DE VACA, CERRO | Cinder cone of PILAS, LAS | Nicaragua | |
| CABEZA DE VACA, CERRO | Stratovolcano of IRAZU | Costa Rica | |
| CABEZA, LA | Stratovolcano of IZTACCIHUATL | México | |
| CABEZUELO, VOLCAN DE EL | Maar of CALATRAVA VOLCANIC FIELD | Western Europe | |
| CABO COWAN | Tuff cone of SANTIAGO | Galápagos Islands | |
| CABRA, ISLA DE [CERRO GRANDE] | Dome of COATEPEQUE CALDERA | El Salvador & Honduras | |
| CABRAS, CERRO LAS | Cinder cone of MICHOACAN-GUANAJUATO | México | |
| CABRAS, MONTANA DE LAS [SAN ANTONIO] | Cinder cone of LA PALMA | Canary Islands | |
| CABRAS, PICOS | Dome of TENERIFE | Canary Islands | |
| CABRET, DJEBEL | Synonym of TAIR, JEBEL AT | Africa (northeastern) & Red Sea | |
| CABRIOLER, VOLCANS DE | Cone of OLOT VOLCANIC FIELD | Western Europe | |
| CABRIS, PITON DES | Cinder cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| CABRITS, MORNE | Dome of PLAT PAYS, MORNE | West Indies | |
| CABRO MUCO-LA GIGANTA | Stratovolcano of MIRAVALLES | Costa Rica | |
| CABURGUA, VOLCANES DE | Cone of CABURGUA-HUELEMOLLE | Central Chile & Argentina | |
| CABURGUA-HUELEMOLLE | Cinder cones | Tephrochronology | Central Chile & Argentina |
| CABUT, BUKIT | Cone of BESAR | Sumatra | |
| CACAO | Stratovolcano of OROSI | Costa Rica | |
| CACHANI | Synonym of CHACHANI, NEVADO | Perú | |
| CACHE HILL | Shield volcano of EDZIZA | Canada | |
| CACHIO, CERRO | Stratovolcano of APANECA RANGE | El Salvador & Honduras | |
| CACHO NEGRO, VOLCAN | Stratovolcano of BARVA | Costa Rica | |
| CACIQUE, CERRO | Dome of ZITACUARO-VALLE DE BRAVO | México | |
| CACTUS PEAK | Dome of COSO VOLCANIC FIELD | USA (California) | |
| CADENITA | Cinder cone of CHICHINAUTZIN | México | |
| CADES BAY | Dome of NEVIS PEAK | West Indies | |
| CAFIERI | Crater of ISCHIA | Italy | |
| CAGE VOLCANO | Shield volcano of COAXIAL SEGMENT | Pacific Ocean (northern) | |
| CAGSIAY HOT SPRINGS | Thermal Feature of BANAHAW | Luzon | |
| CAGUA | Stratovolcano | Historical | Luzon |
| CAICHINQUE | Stratovolcanoes | Holocene? | Northern Chile, Bolivia & Argentina |
| CAILLE, ILE DE | Tuff ring of KICK 'EM JENNY | West Indies | |
| CAIMAN, MONTANA | Cone of FUERTEVENTURA | Canary Islands | |
| CAIRAT, VOLCA | Cone of OLOT VOLCANIC FIELD | Western Europe | |
| CAJETE, EL | Crater of VALLES CALDERA | USA (New Mexico) | |
| CAJON LOS CALABOZOS | Thermal Feature of CALABOZOS | Central Chile & Argentina | |
| CAKASUANGGI | Stratovolcano of AMASING | Halmahera | |
| CALA BIANCA | Crater of PANAREA | Italy | |
| CALA DELL'ALCA | Cone of PANTELLERIA | Italy | |
| CALA DELL'ALTURA | Shield volcano of PANTELLERIA | Italy | |
| CALA DI TRAMONTANA | Cone of PANTELLERIA | Italy | |
| CALA FICO | Submarine vent of LIPARI | Italy | |
| CALABOZOS | Caldera | Holocene | Central Chile & Argentina |
| CALATRAVA VOLCANIC FIELD | Pyroclastic cones | Radiocarbon | Western Europe |
| CALBUCO | Stratovolcano | Historical | Southern Chile & Argentina |
| CALCARA, LA | Thermal Feature of PANAREA | Italy | |
| CALCARAZZI, MONTE | Cinder cone of ETNA | Italy | |
| CALDEIRA | Crater of PICOS VOLCANIC SYSTEM | Azores | |
| CALDERA / CALDERAS | See proper name (e.g. CUERVOS, CALDERA DE LOS) | ||
| CALDERA, CERRO DE LA | Cone of CHICHINAUTZIN | México | |
| CALDERA, LA | Crater of LANZAROTE | Canary Islands | |
| CALDERA, LAGUNA | Cinder cone of SAN SALVADOR | El Salvador & Honduras | |
| CALDERA, LOMA | Tuff ring of SAN SALVADOR | El Salvador & Honduras | |
| CALDERAS, LAS | Cinder cone of FUERTEVENTURA | Canary Islands | |
| CALDERETA, LA | Crater of TENERIFE | Canary Islands | |
| CALDERETA, MONTANA DE LA | Cone of FUERTEVENTURA | Canary Islands | |
| CALDERITA, LA | Vent of FUERTEVENTURA | Canary Islands | |
| CALDERON, EL | Crater of ZUNI-BANDERA | USA (New Mexico) | |
| CALDERON, VOLCAN | Synonym of ALCEDO | Galápagos Islands | |
| CALDIERA | Caldera of CORVO | Azores | |
| CALDIERA | Caldera of FAYAL | Azores | |
| CALDIERAS | Thermal Feature of FURNAS | Azores | |
| CALDWELL BUTTE | Cone of MEDICINE LAKE | USA (California) | |
| CALEBASSE, MORNE | Dome of PELEE | West Indies | |
| CALIBATO, LAKE | Maar of SAN PABLO VOLCANIC FIELD | Luzon | |
| CALIENTE | Vent of SANTA MARIA | Guatemala | |
| CALIENTE, CERRO | Twin volcano of YUCAMANE | Perú | |
| CALIENTE, LAGUNA | Crater of POAS | Costa Rica | |
| CALLAQUEN | Synonym of CALLAQUI | Central Chile & Argentina | |
| CALLAQUI | Stratovolcano | Historical | Central Chile & Argentina |
| CALLO, CERRITO DEL | Cone of COTOPAXI | Ecuador | |
| CALLVUCO (CALLUNETO) | Synonym of OSORNO | Southern Chile & Argentina | |
| CALOMETS, PITON | Cinder cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| CALUNAN, MT. | Stratovolcano of BULUSAN | Luzon | |
| CALUNGALAN, MT. | Cone of BULUSAN | Luzon | |
| CALVARIO, EL | Cone of CHICHINAUTZIN | México | |
| CAM TIEM MOUNT | Cone of BAS DONG NAI | Southeast Asia | |
| CAMALDOLI DELLA TORRE | Cone of VESUVIUS | Italy | |
| CAMARINHAS, PICO DAS | Cone of SETE CIDADES | Azores | |
| CAMATARAN, CERRO | Shield volcano of MICHOACAN-GUANAJUATO | México | |
| CAMBADO, PICO DO | Cone of PICOS VOLCANIC SYSTEM | Azores | |
| CAMBRIA, MT. | Cone of AUCKLAND FIELD | New Zealand | |
| CAMELS HUMP, THE | Dome of NEWER VOLCANICS PROV | Australia | |
| CAMERCIA | Cinder cone of ETNA | Italy | |
| CAMERON, MT. | Cone of NEWER VOLCANICS PROV | Australia | |
| CAMEROON | Stratovolcano | Historical | Africa (western) |
| CAMEROUN, MONT | Synonym of CAMEROON | Africa (western) | |
| CAMIGUIN | Stratovolcanoes | Historical | Mindanao |
| CAMIGUIN DE BABUYANES | Stratovolcano | Historical | North of Luzon |
| CAMIGUIN DE MINDANAO [MT. VULCAN] | Dome of CAMIGUIN | Mindanao | |
| CAMIGUIN DE MISAMIS [MT. VULCAN] | Dome of CAMIGUIN | Mindanao | |
| CAMIGUIN DEL SUR [MT. VULCAN] | Dome of CAMIGUIN | Mindanao | |
| CAMIGUIN TANDA | Stratovolcano of CAMIGUIN | Mindanao | |
| CAMIGUIN, MT. | Stratovolcano of CAMIGUIN DE BABUYANES | North of Luzon | |
| CAMILLE CONE | Cone of IMURUK LAKE | Alaska (western) | |
| CAMOGON | Dome of LEONARD RANGE | Mindanao | |
| CAMP HILL | Shield volcano of EDZIZA | Canada | |
| CAMPAGNANO, MT. | Crater of ISCHIA | Italy | |
| CAMPANA HILL | Dome of CAMIGUIN | Mindanao | |
| CAMPANARIO, EL | Cinder cone of HIERRO | Canary Islands | |
| CAMPANIAN IGNIMBRITE | Pleistocene caldera of CAMPI FLEGREI | Italy | |
| CAMPI FLEGREI | Caldera | Historical | Italy |
| CAMPI FLEGREI MAR SICILIA | Submarine volcanoes | Historical | Italy |
| CAMPI FLEIGREI CANALE DE SICILIA | Synonym of CAMPI FLEGREI MAR SICILIA | Italy | |
| CAMPOSANTO, CERRO | Cone of IXTEPEQUE | Guatemala | |
| CAMPOTESE | Crater of ISCHIA | Italy | |
| CAMPRIDA, CALDEIRA | Tuff ring of FLORES | Azores | |
| CAMPS RIDGE [MADDEN'S MOUNT] | Dome of NEVIS PEAK | West Indies | |
| CAN SIMO, VOLCA | Cone of OLOT VOLCANIC FIELD | Western Europe | |
| CAN TIA, VOLCA | Cone of OLOT VOLCANIC FIELD | Western Europe | |
| CANACUARAN [METATE, CERRO EL] | Shield volcano of MICHOACAN-GUANAJUATO | México | |
| CANADA OBSCURA, CERRO | Dome of ZITACUARO-VALLE DE BRAVO | México | |
| CANADAS, LAS | Pleistocene caldera of TENERIFE | Canary Islands | |
| CANALAON | Synonym of KANLAON | Central Philippines | |
| CANAR | Crater of TALAGABODAS | Java | |
| CANARIO, LAGOA DO | Maar of SETE CIDADES | Azores | |
| CANARIO, PICO DE | Pumice cone of FURNAS | Azores | |
| CANAS DULCES | Dome of RINCON DE LA VIEJA | Costa Rica | |
| CANASTE | Synonym of ARENAL | Costa Rica | |
| CANASTO | Crater of LONQUIMAY | Central Chile & Argentina | |
| CANDADO, EL | Cone of MAULE, LAGUNA DEL | Central Chile & Argentina | |
| CANDELERO | Dome of ZITACUARO-VALLE DE BRAVO | México | |
| CANDLEMAS ISLAND | Stratovolcano | Historical | Antarctica & South Sandwich Islands |
| CANGKUANG | Crater of SALAK | Java | |
| CANITAS, CERRO | Cinder cone of COATEPEQUE CALDERA | El Salvador & Honduras | |
| CANLAON | Synonym of KANLAON | Central Philippines | |
| CANNETO DENTRO | Stratovolcano of LIPARI | Italy | |
| CANON DE LAS FLORES | Vent of PRIMAVERA, SIERRA LA | México | |
| CANOT, MORNE | Dome of PLAT PAYS, MORNE | West Indies | |
| CANTARIELLO | Cone of ISCHIA | Italy | |
| CANTARRANAS, CERRO | Cone of ZITACUARO-VALLE DE BRAVO | México | |
| CANTERA, CERRO LA | Dome of MICHOACAN-GUANAJUATO | México | |
| CANTO, CABECO DO | Cone of FAYAL | Azores | |
| CANTOCLOC [CANTOLOC] | Stratovolcano of CABALIAN | Central Philippines | |
| CANTOLOC | Stratovolcano of CABALIAN | Central Philippines | |
| CANTONE | Cinder cone of ETNA | Italy | |
| CANYA, VOLCA LA | Cone of OLOT VOLCANIC FIELD | Western Europe | |
| CANYON CREEK [SECOND CANYON] | Cone of ISKUT-UNUK RIVER CONES | Canada | |
| CAOE KOKKINOPETRA | Cinder cone of SANTORINI | Greece | |
| CAOLANGOJAN [KASIBOI] | Cone of MAHAGNAO | Central Philippines | |
| CAOPO | Cone of TENGCHONG | Southeast Asia | |
| CAPACUARO, CERROS DE | Shield volcano of MICHOACAN-GUANAJUATO | México | |
| CAPARINA | Dome of CHACANA | Ecuador | |
| CAPARRA, LOMA | Dome of SAN CRISTOBAL | Nicaragua | |
| CAPATACUTIRO, CERRO DE | Cinder cone of MICHOACAN-GUANAJUATO | México | |
| CAPAXTIRO, CERRO | Shield volcano of MICHOACAN-GUANAJUATO | México | |
| CAPE BALOS | Cinder cone of SANTORINI | Greece | |
| CAPE BERKELEY VOLCANO | Synonym of ECUADOR | Galápagos Islands | |
| CAPE BIDLINGMAIER | Cone of HEARD | Indian Ocean (southern) | |
| CAPE BRIDGEWATER | Cone of NEWER VOLCANICS PROV | Australia | |
| CAPE CARTWRIGHT | Cone of HEARD | Indian Ocean (southern) | |
| CAPE COLUMBOS | Tuff ring of SANTORINI | Greece | |
| CAPE MAVRORACHIDI | Cinder cone of SANTORINI | Greece | |
| CAPE RIVER | Pleistocene caldera of SANTORINI | Greece | |
| CAPE VALDIVIA | Dome of BOUVET | Atlantic Ocean (southern) | |
| CAPELAS | Tuff cone of PICOS VOLCANIC SYSTEM | Azores | |
| CAPELINHOS | Cone of FAYAL | Azores | |
| CAPILLA, LA | Crater of CUMBRES, LAS | México | |
| CAPO GROSSO | Submarine vent of LIPARI | Italy | |
| CAPRARA | Dome of CAMPI FLEGREI | Italy | |
| CAPRICORN, MT. | Cone of MEAGER | Canada | |
| CAPULIN | Cinder cone of CHICHINAUTZIN | México | |
| CARABAO KILLER | Thermal Feature of KANLAON | Central Philippines | |
| CARACHA, LA | Stratovolcano of ATACAZO | Ecuador | |
| CARACOL | Crater of AZUL, CERRO | Central Chile & Argentina | |
| CARACOL, VOLCAN | Cone of TOLGUACA | Central Chile & Argentina | |
| CARACORAL, CERRO | Dome of VALLE, EL | Panamá | |
| CARAVAJALES CRATER | Crater of PINACATE | México | |
| CARBET, FUMEROLLES DU | Thermal Feature of SOUFRIERE GUADELOUPE | West Indies | |
| CARBONERA, LA | Pleistocene caldera of SAN VICENTE | El Salvador & Honduras | |
| CARCABULLO O PEDREGAL [CALDERA COLORADA] | Cinder cone of LANZAROTE | Canary Islands | |
| CARDAKH | Crater of ERCIYES DAGI | Turkey | |
| CARDOS, LOS | Cinder cone of CHICHINAUTZIN | México | |
| CAREME | Synonym of CEREME | Java | |
| CARI-LAUNA, VOLCANES | Dome of MAULE, LAGUNA DEL | Central Chile & Argentina | |
| CARIBALD HILL [GARIBALDI HILL] | Stratovolcano of SOUFRIERE HILLS | West Indies | |
| CARIBLANCO [CERRO CONGO] | Stratovolcano of POAS | Costa Rica | |
| CARIBOU TUYA | Tuya of TUYA VOLCANIC FIELD | Canada | |
| CARICIAS | Stratovolcano of BARVA | Costa Rica | |
| CARIK TEPE | Dome of ERCIYES DAGI | Turkey | |
| CARIRINE | Stratovolcano of HUANQUIHUE GROUP | Central Chile & Argentina | |
| CARLING HILL | Dome of CAMIGUIN | Mindanao | |
| CARLISLE | Stratovolcano | Historical | Aleutian Islands |
| CARMELO CRATER | Crater of BAKER | USA (Washington) | |
| CARMELO, LA MONTANA DEL | Synonym of BAKER | USA (Washington) | |
| CARMICHAEL | Stratovolcano of SOUFRIERE GUADELOUPE | West Indies | |
| CARNEGIE VOLCANO | Cinder cone of PINACATE | México | |
| CARNEIRO, MONTE | Cone of FAYAL | Azores | |
| CARNERO, CERRO EL | Cone of FLORES | Guatemala | |
| CAROLI ? | Synonym of SHISHALDIN | Aleutian Islands | |
| CARPINTERO NORTE, EL | Cinder cone of COLIMA | México | |
| CARPINTERO SUR, EL | Cinder cone of COLIMA | México | |
| CARRAN | Maar of CARRAN-LOS VENADOS | Central Chile & Argentina | |
| CARRAN, CERRO [LOS GUINDOS] | Stratovolcano of CARRAN-LOS VENADOS | Central Chile & Argentina | |
| CARRAN-LOS VENADOS | Pyroclastic cones | Historical | Central Chile & Argentina |
| CARRIZOZO | Cinder cones | Surface Exposure | USA (New Mexico) |
| CARTAGO, VOLCAN DE | Synonym of IRAZU | Costa Rica | |
| CARVAO | Cone of SETE CIDADES | Azores | |
| CASA DIABLO HOT SPRINGS | Thermal Feature of LONG VALLEY | USA (California) | |
| CASABLANCA | Stratovolcano of ANTILLANCA GROUP | Central Chile & Argentina | |
| CASAS, LAS | Thermal Feature of TENORIO | Costa Rica | |
| CASCAJO, MONTANA | Cinder cone of TENERIFE | Canary Islands | |
| CASIBOY [KASIBOI] | Cone of MAHAGNAO | Central Philippines | |
| CASIRI, NEVADOS | Stratovolcanoes | Holocene | Perú |
| CASITA | Stratovolcano of SAN CRISTOBAL | Nicaragua | |
| CASITAS, VOLCAN | Fissure vent of AZUL, CERRO | Central Chile & Argentina | |
| CASM VENT FIELD | Thermal Feature of AXIAL SEAMOUNT | Pacific Ocean (northern) | |
| CASSIEN, CRATERE | Crater of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| CASSIOPE CONE | Cone of IMURUK LAKE | Alaska (western) | |
| CASTEIHANO, PICO DO | Cone of PICOS VOLCANIC SYSTEM | Azores | |
| CASTELGANDOLFO [ALBANO] | Maar of ALBAN HILLS | Italy | |
| CASTELLARO | Pleistocene caldera of LIPARI | Italy | |
| CASTELLO | Dome of PANAREA | Italy | |
| CASTELLO D'ISCHIA | Dome of ISCHIA | Italy | |
| CASTELO BRANCO | Dome of FAYAL | Azores | |
| CASTIGLIONE | Crater of ALBAN HILLS | Italy | |
| CASTIGLIONE | Dome of ISCHIA | Italy | |
| CASTILLO, CERRO DE LOS | Cinder cone of CHINGO | Guatemala | |
| CASTILLO, CERRO EL | Cone of LAJAS, LAS | Nicaragua | |
| CASTILLO, EL | Dome of YEGUADA, LA | Panamá | |
| CASTLE OF ISCHIA [CASTELLO D'ISCHIA] | Dome of ISCHIA | Italy | |
| CASTLE PEAK | Dome of SOUFRIERE HILLS | West Indies | |
| CASTLE ROCK | Dome of BOGOSLOF | Aleutian Islands | |
| CASTOR | Cone of SEAL NUNATAKS GROUP | Antarctica & South Sandwich Islands | |
| CASTRO BANK | Synonym of DON JOAO DE CASTRO BANK | Azores | |
| CASUELA JUYU | Synonym of TOLIMAN | Guatemala | |
| CATACU, CERRO | Cinder cone of MICHOACAN-GUANAJUATO | México | |
| CATANIA, MONTE DI | Synonym of ETNA | Italy | |
| CATARMAN | Synonym of CAMIGUIN | Mindanao | |
| CATARMAN [HIBOK-HIBOK] | Stratovolcano of CAMIGUIN | Mindanao | |
| CATATUNGAN | Synonym of KALATUNGAN | Mindanao | |
| CATERATTTE, MONTE | Cinder cone of ETNA | Italy | |
| CATHEDRAL ROCK [NAPERITO] | Tuff cone of BARRIER, THE | Africa (eastern) | |
| CATHERINE | Tuff ring of GADA ALE | Africa (northeastern) & Red Sea | |
| CATINOCJUYUP [CERRO QUEMADO] | Dome of ALMOLONGA | Guatemala | |
| CATU | Crater of BATUR | Lesser Sunda Islands | |
| CATUR CALDERA | Synonym of BRATAN | Lesser Sunda Islands | |
| CAUA | Synonym of CAGUA | Luzon | |
| CAUBET, CRATERE | Crater of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| CAULLE CHICO [PICHI CAULLE] | Cone of PUYEHUE-CORDON CAULLE | Central Chile & Argentina | |
| CAULLE GRANDE | Synonym of PUYEHUE-CORDON CAULLE | Central Chile & Argentina | |
| CAVA NOCELLE | Crater of ISCHIA | Italy | |
| CAVA PETRELLA | Cone of ISCHIA | Italy | |
| CAVAGNARO | Crater of SANTA CRUZ | Galápagos Islands | |
| CAVALO, PICO DO | Cone of SETE CIDADES | Azores | |
| CAVE GULCH HILL | Cinder cone of TRISTAN DA CUNHA | Atlantic Ocean (southern) | |
| CAVERNE POMME DE TERRE, PITON | Cinder cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| CAVERNE, ILE DE LA | Synonym of PRINCE EDWARD ISLAND | Indian Ocean (southern) | |
| CAVIAHUE | Caldera of COPAHUE | Central Chile & Argentina | |
| CAVO, MONTE | Synonym of ALBAN HILLS | Italy | |
| CAVO, MT. | Cinder cone of ALBAN HILLS | Italy | |
| CAVONI | Submarine vent of STROMBOLI | Italy | |
| CAWALO | Thermal Feature of PALUWEH | Lesser Sunda Islands | |
| CAWS ROAD | Dome of MAROA | New Zealand | |
| CAY | Stratovolcano | Holocene? | Southern Chile & Argentina |
| CAYAMBE | Compound volcano | Historical | Ecuador |
| CAYAPIREN | Synonym of MINCHINMAVIDA | Southern Chile & Argentina | |
| CAYONAN | Cone of BABUYAN CLARO | North of Luzon | |
| CAYUSE CONE | Cinder cone of SOUTH SISTER | USA (Oregon) | |
| CAYUTE, VOLCAN | Cone of CAYUTUE-LA VIGUERIA | Southern Chile & Argentina | |
| CAYUTUE-LA VIGUERIA | Pyroclastic cones | Tephrochronology | Southern Chile & Argentina |
| CAZUEL, CERRO | Pyroclastic Cone of NEGRA, SIERRA | Galápagos Islands | |
| CEBOLLAS, LAS | Dome of ZITACUARO-VALLE DE BRAVO | México | |
| CEBOROQUITO | Cinder cone of CEBORUCO | México | |
| CEBORUCO | Stratovolcano | Historical | México |
| CEDAR HILL | Dome of EBURRU, OL DOINYO | Africa (eastern) | |
| CEDRO, PICO DO | Cone of SETE CIDADES | Azores | |
| CEHENNEM TEPE | Crater of TENDUREK DAGI | Turkey | |
| CEIBA CHACHA, CERRO | Cinder cone of COATEPEQUE CALDERA | El Salvador & Honduras | |
| CEILLE, PITON | Cinder cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| CEKOK, KAWAH | Thermal Feature of GALUNGGUNG | Java | |
| CELAYA CRATER | Maar of PINACATE | México | |
| CELLE | Crater of CAMPI FLEGREI | Italy | |
| CELOSA, CERRO LA | Cone of OLLAGUE | Northern Chile, Bolivia & Argentina | |
| CEMARA, GUNUNG | Cone of IJEN | Java | |
| CEMEL TEPE | Maar of KULA | Turkey | |
| CEMENTERIO BRITO, CERRO DEL | Cinder cone of CUILAPA-BARBARENA | Guatemala | |
| CEMENTERIO CERRO REDONDO, CERRO | Cinder cone of CUILAPA-BARBARENA | Guatemala | |
| CEMETARY CRATER | Maar of AUCKLAND FIELD | New Zealand | |
| CEMOROLAWANG | Stratovolcano of TENGGER CALDERA | Java | |
| CEMOROLAWANG [CEMARA LAWANG] | Stratovolcano of TENGGER CALDERA | Java | |
| CEMRKOPRU BARAJ GOLU | Cone of KULA | Turkey | |
| CENDRES, ILE DES | Submarine volcanoes | Historical | Southeast Asia |
| CENGYU | Synonym of ZENGYU | Taiwan | |
| CENIZA, VOLCAN | Cinder cone of SAN QUINTIN VOLCANIC FIELD | México | |
| CENIZAS, CERRO | Cone of CORDON DE PUNTAS NEGRAS | Northern Chile, Bolivia & Argentina | |
| CENIZAS, CERRO | Synonym of PUNTIAGUDO-CORDON CENIZOS | Central Chile & Argentina | |
| CENO-SEMIACHIK | Stratovolcano of MALY SEMIACHIK | Kamchatka Peninsula | |
| CENTENARI, MONTE | Cinder cone of ETNA | Italy | |
| CENTRAL ATITLAN | Cone of TOLIMAN | Guatemala | |
| CENTRAL CONE | Stratovolcano of WHITE ISLAND | New Zealand | |
| CENTRAL CONE GROUP | Cinder cone of COFRE DE PEROTE | México | |
| CENTRAL CRATER COMPLEX | Caldera of DIAMOND CRATERS | USA (Oregon) | |
| CENTRAL DOME | Dome of WHALE ISLAND | New Zealand | |
| CENTRAL GROUP | Cinder cone of SAND MOUNTAIN FIELD | USA (Oregon) | |
| CENTRAL ISLAND | Tuff cones | Holocene | Africa (eastern) |
| CENTRAL PUMICE CONE | Pumice cone of NEWBERRY | USA (Oregon) | |
| CENTRAL REEFS | Crater of PANAREA | Italy | |
| CENTRAL, PICO | Synonym of ACATENANGO | Guatemala | |
| CENTRALNY | Shield volcano of POGRANYCHNY | Kamchatka Peninsula | |
| CENTRE PEAK | Cone of ZUBAIR, JEBEL | Africa (northeastern) & Red Sea | |
| CENTRO, EL | Dome of CEBORUCO | México | |
| CERBERUS | Stratovolcano of SEMISOPOCHNOI | Aleutian Islands | |
| CERBERUS, MT. | Dome of TRIDENT | Alaska Peninsula | |
| CEREME | Stratovolcano | Historical | Java |
| CERIMAI | Synonym of CEREME | Java | |
| CERISY PEAK | Stratovolcano of LONG ISLAND | Northeast of New Guinea | |
| CERME | Synonym of CEREME | Java | |
| CERRA, LA | Cone of PACAYA | Guatemala | |
| CERRADO NOVO | Dome of AGUA DE PAU | Azores | |
| CERRILLO, CERRO EL [CHAJNANTOR] | Dome of PURICO COMPLEX | Northern Chile, Bolivia & Argentina | |
| CERRITO | See proper name (e.g. ESPINO, CERRITO EL) | Spanish for PEAK | |
| CERRITO, CERRO EL | Cinder cone of NAOLINCO VOLCANIC FIELD | México | |
| CERRITO, CERRO EL | Cinder cone of SAN SALVADOR | El Salvador & Honduras | |
| CERRITO, EL | Cinder cone of APANECA RANGE | El Salvador & Honduras | |
| CERRITOS, LOS | Cone of SANTIAGO, CERRO | Guatemala | |
| CERRO | See proper name (e.g. MESA, CERRO DE) | Spanish for PEAK | |
| CERRON, CERRO | Dome of APASTEPEQUE FIELD | El Salvador & Honduras | |
| CERRON, CERRO EL | Cone of IXTEPEQUE | Guatemala | |
| CERRON, EL | Synonym of SINGUIL, CERRO | El Salvador & Honduras | |
| CEYSSAT, MAAR DE | Maar of CHAINE DES PUYS | Western Europe | |
| CHA | Caldera of FOGO | Cape Verde Islands | |
| CHABBI [CHEBBI] | Stratovolcano of CORBETTI CALDERA | Africa (northeastern) & Red Sea | |
| CHAC-INCA, CERRO | Dome of AZUFRE, CERRO DEL | Northern Chile, Bolivia & Argentina | |
| CHACANA | Caldera | Historical | Ecuador |
| CHACHA | Synonym of TIATIA | Kuril Islands | |
| CHACHACASTE, CERRO | Dome of ILOPANGO | El Salvador & Honduras | |
| CHACHANI, NEVADO | Stratovolcano | Holocene? | Perú |
| CHACHANOBORI (CHACHANUPURI) | Synonym of TIATIA | Kuril Islands | |
| CHACHANUPURI | Synonym of ALAID | Kuril Islands | |
| CHACHIMBIRO | Stratovolcano | Radiocarbon | Ecuador |
| CHADUTKA | Synonym of KHODUTKA | Kamchatka Peninsula | |
| CHAGUITILLO, CERRO | Dome of IXTEPEQUE | Guatemala | |
| CHAGULAK | Stratovolcano | Holocene | Aleutian Islands |
| CHAHALE | Pit crater of KARTHALA | Indian Ocean (western) | |
| CHAHOLO | Dome of SW USANGU BASIN | Africa (eastern) | |
| CHAHORRA | Cinder cone of TENERIFE | Canary Islands | |
| CHAIKUTES | Thermal Feature of KOS | Greece | |
| CHAIMU | Cone of CHYULU HILLS | Africa (eastern) | |
| CHAIN OF CRATERS | Crater of CENTRAL ISLAND | Africa (eastern) | |
| CHAINE DES PUYS | Cinder cones | Radiocarbon | Western Europe |
| CHAIQUEMAHUIDA, VOLCAN | Cinder cone of MOCHO-CHOSHUENCO | Central Chile & Argentina | |
| CHAISANDUKU | Crater of BUNYARUGURU | Africa (central) | |
| CHAITEN | Caldera | Radiocarbon | Southern Chile & Argentina |
| CHAJNANTOR, CERRO | Dome of PURICO COMPLEX | Northern Chile, Bolivia & Argentina | |
| CHAKUNAGE | Cone of NISEKO | Hokkaido | |
| CHALA | Cone of KILIMANJARO | Africa (eastern) | |
| CHALARD, PUY | Cone of CHAINE DES PUYS | Western Europe | |
| CHALCHIHUITES | Cinder cone of CHICHINAUTZIN | México | |
| CHALCHUAPA, CERRITO DE | Cinder cone of APASTEPEQUE FIELD | El Salvador & Honduras | |
| CHALCHUAPA, LAGUNA DE [LAGUNA DE CHALCHUAPAN] | Pit crater of APASTEPEQUE FIELD | El Salvador & Honduras | |
| CHALCHUAPAN, LAGUNA DE | Pit crater of APASTEPEQUE FIELD | El Salvador & Honduras | |
| CHALLAPIREN | Synonym of MINCHINMAVIDA | Southern Chile & Argentina | |
| CHALLHUE MAURAS, VOLCAN | Cinder cone of ANDAHUA-ORCOPAMPA | Perú | |
| CHAMBAGUNGURU | Cone of KIEYO | Africa (eastern) | |
| CHAMBAJI | Dome of SW USANGU BASIN | Africa (eastern) | |
| CHAMBASEGERA | Cone of KIEYO | Africa (eastern) | |
| CHAMBUGA [MBUGA] | Tuff cone of KATWE-KIKORONGO | Africa (central) | |
| CHAMENGO | Crater of BUNYARUGURU | Africa (central) | |
| CHAMONGERA | Dome of SW USANGU BASIN | Africa (eastern) | |
| CHAMPAGNE | Thermal Feature of NW EIFUKU | Izu, Volcano, & Mariana Islands | |
| CHAMPAGNE | Thermal Feature of PLAT PAYS, MORNE | West Indies | |
| CHAMPALALA | Dome of SW USANGU BASIN | Africa (eastern) | |
| CHAMPES PHLEGRAIS | Synonym of CAMPI FLEGREI | Italy | |
| CHAMUSCADA, MONTANA | Cinder cone of HIERRO | Canary Islands | |
| CHANA | Synonym of MINCHINMAVIDA | Southern Chile & Argentina | |
| CHANAL, CERRO EL | Cinder cone of GRANADA | Nicaragua | |
| CHANCE'S MOUNTAIN | Synonym of SOUFRIERE HILLS | West Indies | |
| CHANCE'S PEAK | Dome of SOUFRIERE HILLS | West Indies | |
| CHANCHANI | Synonym of CHACHANI, NEVADO | Perú | |
| CHANCHO, VOLCAN | Cinder cone of CARRAN-LOS VENADOS | Central Chile & Argentina | |
| CHANCHOCO, TERMAS DE | Thermal Feature of COPAHUE | Central Chile & Argentina | |
| CHANCHOS, LOS | Dome of COSIGUINA | Nicaragua | |
| CHANEL | Synonym of LLAIMA | Central Chile & Argentina | |
| CHANG PEAK | Shield volcano of WAESCHE | Antarctica & South Sandwich Islands | |
| CHANG-PAI | Thermal Feature of CHANGBAISHAN | China (eastern) | |
| CHANG-PAI-SHAN | Synonym of CHANGBAISHAN | China (eastern) | |
| CHANGAR | Synonym of KHANGAR | Kamchatka Peninsula | |
| CHANGBAISHAN | Stratovolcano | Historical | China (eastern) |
| CHANGOMENI [CHOUNGOU-CHAGNOUMENI] | Pit crater of KARTHALA | Indian Ocean (western) | |
| CHANGOU-CHAHALE [CHOUNGOU-CHAHALE] | Pit crater of KARTHALA | Indian Ocean (western) | |
| CHANGPO | Cone of TENGCHONG | Southeast Asia | |
| CHANJALE | Caldera of TACANA | México | |
| CHANKA | Dome of AZUFRE, CERRO DEL | Northern Chile, Bolivia & Argentina | |
| CHANKOROGO | Dome of SW USANGU BASIN | Africa (eastern) | |
| CHANMICO, LAGUNA DE | Maar of SAN SALVADOR | El Salvador & Honduras | |
| CHANQUE-MALLIN | Stratovolcano of DOMUYO | Central Chile & Argentina | |
| CHANUJ GOL | Synonym of KHANUY GOL | Mongolia | |
| CHAOKHCH | Synonym of KOSHELEV | Kamchatka Peninsula | |
| CHAOS CRAGS | Dome of LASSEN VOLCANIC CENTER | USA (California) | |
| CHAPARRASTIQUE | Synonym of SAN MIGUEL | El Salvador & Honduras | |
| CHAPCHAP | Cone of OKU VOLCANIC FIELD | Africa (western) | |
| CHAPULIN, CERRO EL | Dome of PRIMAVERA, SIERRA LA | México | |
| CHAPULTEPEC | Lava cone of CHICHINAUTZIN | México | |
| CHAPULUL, CERRO | Cinder cone of MARINAQUI, LAGUNA | Central Chile & Argentina | |
| CHARASH-DAG | Shield volcano of AZAS PLATEAU | Russia (southeastern) | |
| CHARCO MUERTO | Tuff ring of ZAPATERA | Nicaragua | |
| CHARCO, EL | Cinder cone of LA PALMA | Canary Islands | |
| CHARMONT, PUY DE | Cone of CHAINE DES PUYS | Western Europe | |
| CHAROS | Thermal Feature of MILOS | Greece | |
| CHASCON DE PURICO [CERRO EL CHASCON] | Dome of PURICO COMPLEX | Northern Chile, Bolivia & Argentina | |
| CHASCON SUR, CERRO | Cinder cone of CARRAN-LOS VENADOS | Central Chile & Argentina | |
| CHASCON, CERRO | Dome of GUAYAQUES | Northern Chile, Bolivia & Argentina | |
| CHASCON, CERRO | Cinder cone of CARRAN-LOS VENADOS | Central Chile & Argentina | |
| CHASCON, CERRO EL | Dome of PURICO COMPLEX | Northern Chile, Bolivia & Argentina | |
| CHASHAKONDZHA | Stratovolcano of ALNEY-CHASHAKONDZHA | Kamchatka Peninsula | |
| CHASM, THE [LA VORAGINE] | Crater of ETNA | Italy | |
| CHASM, THE [WAHANGA-WAIMANGU] | Fissure vent of OKATAINA | New Zealand | |
| CHAT, PITON DE | Cinder cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| CHATA, CERRO LA | Lava cone of SAN DIEGO | El Salvador & Honduras | |
| CHATEAU FORT, LE | Crater of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| CHATHAM | Synonym of SAN CRISTOBAL | Galápagos Islands | |
| CHATITO | Dome of ARENAL | Costa Rica | |
| CHATO | Dome of ZITACUARO-VALLE DE BRAVO | México | |
| CHATO, CERRITO | Dome of VALLES CALDERA | USA (New Mexico) | |
| CHATO, CERRO | Dome of PRIMAVERA, SIERRA LA | México | |
| CHATO, CERRO | Cone of RINCON DE LA VIEJA | Costa Rica | |
| CHATO, CERRO | Stratovolcano of ARENAL | Costa Rica | |
| CHAUDIERES, LES | Thermal Feature of SOUFRIERE GUADELOUPE | West Indies | |
| CHAUDRON | Cone of AMSTERDAM ISLAND | Indian Ocean (southern) | |
| CHAUMONT, PUY DE | Cone of CHAINE DES PUYS | Western Europe | |
| CHAUSU-DAKE | Dome of NASU | Honshu | |
| CHAUSU-YAMA | Dome of KITA YATSUGA-TAKE | Honshu | |
| CHAUSU-YAMA | Synonym of NIIGATA-YAKE-YAMA | Honshu | |
| CHAVAS | Crater of GALERAS | Colombia | |
| CHAYACHII | Dome of KURILE LAKE | Kamchatka Peninsula | |
| CHAYLL | Synonym of LLAIMA | Central Chile & Argentina | |
| CHEBBI | Stratovolcano of CORBETTI CALDERA | Africa (northeastern) & Red Sea | |
| CHEBRIT ALE | Synonym of GADA ALE | Africa (northeastern) & Red Sea | |
| CHECHITNO PEAK | Synonym of WRANGELL | Alaska (eastern) | |
| CHEIMU [CHAIMU] | Cone of CHYULU HILLS | Africa (eastern) | |
| CHEJU-DO | Synonym of HALLA | Korea | |
| CHELI MINE, PITON | Cinder cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| CHEMINEE NORD [CHANGOMENI] | Pit crater of KARTHALA | Indian Ocean (western) | |
| CHEMINEE SUD [CHAHALE] | Pit crater of KARTHALA | Indian Ocean (western) | |
| CHENGZILOU | Cone of TENGCHONG | Southeast Asia | |
| CHEPE | Cinder cone of UDOKAN PLATEAU | Russia (southeastern) | |
| CHEPTOMAS | Dome of PAKA | Africa (eastern) | |
| CHEQUEPUQUINA | Synonym of HUAYNAPUTINA | Perú | |
| CHERINGERAN, CERRO DE | Cinder cone of MICHOACAN-GUANAJUATO | México | |
| CHERINKUTAN | Synonym of CHIRINKOTAN | Kuril Islands | |
| CHERNABURA | Synonym of AUGUSTINE | Alaska (southwestern) | |
| CHERNOYE LAKE | Thermal Feature of BOLSHOI SEMIACHIK | Kamchatka Peninsula | |
| CHERNY | Stratovolcano of CHIRPOI | Kuril Islands | |
| CHERNY | Dome of BOLSHOI SEMIACHIK | Kamchatka Peninsula | |
| CHERNY | Stratovolcano | Holocene? | Kamchatka Peninsula |
| CHERNYI UTES | Dome of KSUDACH | Kamchatka Peninsula | |
| CHERPUK GROUP | Pyroclastic cones | Radiocarbon | Kamchatka Peninsula |
| CHESORO | Vent of KOROSI | Africa (eastern) | |
| CHETKIN | Synonym of GREAT SITKIN | Aleutian Islands | |
| CHEYU | Dome of SW USANGU BASIN | Africa (eastern) | |
| CHFEALIN | Synonym of ICHINSKY | Kamchatka Peninsula | |
| CHIAPA | Shield volcano of HUMEROS, LOS | México | |
| CHIAR KKOLLU | Cinder cone of JAYU KHOTA, LAGUNA | Northern Chile, Bolivia & Argentina | |
| CHIAUS | Synonym of TEON | Banda Sea | |
| CHIBUZU | Synonym of POAS | Costa Rica | |
| CHICHALDINSKOI | Synonym of SHISHALDIN | Aleutian Islands | |
| CHICHICASTEPEC [CERRO DE APANECA] | Stratovolcano of APANECA RANGE | El Salvador & Honduras | |
| CHICHIGALPA [CASITA] | Stratovolcano of SAN CRISTOBAL | Nicaragua | |
| CHICHIHUALE | Dome of CUMBRES, LAS | México | |
| CHICHIMECO | Dome of ORIZABA, PICO DE | México | |
| CHICHINAUTZIN | Volcanic field | Radiocarbon | México |
| CHICHINAUTZIN, CERRO | Shield volcano of CHICHINAUTZIN | México | |
| CHICHINTOR, CERRITO | Cone of IPALA | Guatemala | |
| CHICHON, EL | Lava domes | Historical | México |
| CHICHONAL, EL | Synonym of CHICHON, EL | México | |
| CHICHONTEPEC | Synonym of SAN VICENTE | El Salvador & Honduras | |
| CHICHONTEPEQUE | Synonym of SAN VICENTE | El Salvador & Honduras | |
| CHICHUJ | Stratovolcano of TACANA | México | |
| CHICKEN KILLER | Thermal Feature of KANLAON | Central Philippines | |
| CHICO, PICO [YEPOCAPA] | Stratovolcano of ACATENANGO | Guatemala | |
| CHICO, VOLCAN | Fissure vent of NEGRA, SIERRA | Galápagos Islands | |
| CHIEN-SHUI-TING-TZU [JIANSHUIDINGZI] | Cone of LONGGANG GROUP | China (eastern) | |
| CHIESA VECCHIA | Stratovolcano of LIPARI | Italy | |
| CHIEWO | Cone of HOMA MOUNTAIN | Africa (eastern) | |
| CHIGIGNAGAK | Synonym of CHIGINAGAK | Alaska Peninsula | |
| CHIGINAGAK | Stratovolcano | Historical | Alaska Peninsula |
| CHIGOWE | Dome of SW USANGU BASIN | Africa (eastern) | |
| CHIHSINGSHAN | Stratovolcano of TATUN GROUP | Taiwan | |
| CHIHUIO | Stratovolcano of HUANQUIHUE GROUP | Central Chile & Argentina | |
| CHIKOIDA MOUNTAIN | Cone of ATLIN VOLCANIC FIELD | Canada | |
| CHIKOSE | Dome of SW USANGU BASIN | Africa (eastern) | |
| CHIKUBO | Cone of IZU-TOBU | Honshu | |
| CHIKURA-DAKE | Synonym of CHIKURACHKI | Kuril Islands | |
| CHIKURACHKI | Stratovolcanoes | Historical | Kuril Islands |
| CHILACAYOTE, CERRO EL | Shield volcano of ZITACUARO-VALLE DE BRAVO | México | |
| CHILCAS, CERRO LAS | Dome of HUAYNAPUTINA | Perú | |
| CHILCAYOC GRANDE, VOLCAN | Cinder cone of ANDAHUA-ORCOPAMPA | Perú | |
| CHILCAYOC, VOLCANES | Cinder cone of ANDAHUA-ORCOPAMPA | Perú | |
| CHILCOTIN CREEK | Cinder cone of SATAH MOUNTAIN | Canada | |
| CHILES | Stratovolcano of NEGRO DE MAYASQUER, CERRO | Colombia | |
| CHILES, LOS | Cinder cone of PLATANAR | Costa Rica | |
| CHILESDO | Dome of ZITACUARO-VALLE DE BRAVO | México | |
| CHILIQUES | Stratovolcano | Holocene? | Northern Chile, Bolivia & Argentina |
| CHILLAN VIEJO [VOLCAN VIEJO] | Stratovolcano of CHILLAN, NEVADOS DE | Central Chile & Argentina | |
| CHILLAN, NEVADOS DE | Stratovolcano | Historical | Central Chile & Argentina |
| CHILLING ISLAND [SILENGE ISLAND] | Cone of MUNDUA | New Britain | |
| CHILOE, VOLCAN DE? | Synonym of CORCOVADO | Southern Chile & Argentina | |
| CHILTEPE | Synonym of APOYEQUE | Nicaragua | |
| CHILTEPE, VOLCAN | Dome of APOYEQUE | Nicaragua | |
| CHIMBORAZO | Stratovolcano | Radiocarbon | Ecuador |
| CHIMNEY CRATER | Crater of LANGILA | New Britain | |
| CHIMNEY MOUNTAIN | Cone of SANTA CRUZ | Galápagos Islands | |
| CHINABORA, MT. | Synonym of AUGUSTINE | Alaska (southwestern) | |
| CHINAL | Synonym of LLAIMA | Central Chile & Argentina | |
| CHINAMECA | Stratovolcano | Holocene | El Salvador & Honduras |
| CHINANDEGA | Synonym of SAN CRISTOBAL | Nicaragua | |
| CHINAPO, CERRO | Dome of AZUFRES, LOS | México | |
| CHINCILLAS, CERRO LAS | Cone of CORDON DE PUNTAS NEGRAS | Northern Chile, Bolivia & Argentina | |
| CHINCONQUIAT, CERRO | Cinder cone of CHICHINAUTZIN | México | |
| CHINENDEGA | Synonym of SAN CRISTOBAL | Nicaragua | |
| CHING-PE | Synonym of JINGBO | China (eastern) | |
| CHINGANA, CERRO LA | Dome of CHACHANI, NEVADO | Perú | |
| CHINGEINGEIN | Shield volcano of UKSICHAN | Kamchatka Peninsula | |
| CHINGO | Stratovolcano | Holocene | Guatemala |
| CHINGO, VOLCAN | Stratovolcano of CHINGO | Guatemala | |
| CHINGPOHU | Synonym of JINGBO | China (eastern) | |
| CHINGYU | Synonym of LONGGANG GROUP | China (eastern) | |
| CHINITOS, LOS | Fissure vent of SAN SALVADOR | El Salvador & Honduras | |
| CHINO, CERRO | Cinder cone of PACAYA | Guatemala | |
| CHINO, CERRO [OLLA, CERRO LA] | Cinder cone of SANTA ANA | El Salvador & Honduras | |
| CHINO, CERRO DEL | Cinder cone of MICHOACAN-GUANAJUATO | México | |
| CHINO, CERRO EL | Dome of AZUFRES, LOS | México | |
| CHINOIKE-JIGOKU | Thermal Feature of TSURUMI | Ryukyu Islands & Kyushu | |
| CHINYERO | Cinder cone of TENERIFE | Canary Islands | |
| CHIO, MONTANA | Fissure vent of TENERIFE | Canary Islands | |
| CHIPILAPA | Thermal Feature of APANECA RANGE | El Salvador & Honduras | |
| CHIQUIMULA VOLCANIC FIELD | Cinder cones | Holocene | Guatemala |
| CHIQUIOMATE | Synonym of HUAYNAPUTINA | Perú | |
| CHIQUITO, CERRO | Dome of PACAYA | Guatemala | |
| CHIRACHA | Stratovolcano | Holocene? | Africa (northeastern) & Red Sea |
| CHIRI-YAMA | Synonym of FUJI | Honshu | |
| CHIRICA | Stratovolcano of LIPARI | Italy | |
| CHIRIHOI [BRAT CHIRPOEV] | Stratovolcano of CHIRPOI | Kuril Islands | |
| CHIRIHOIGAKU [BRAT CHIRPOEV] | Stratovolcano of CHIRPOI | Kuril Islands | |
| CHIRINKOTAN | Stratovolcano | Historical | Kuril Islands |
| CHIRINKUTAN | Synonym of CHIRINKOTAN | Kuril Islands | |
| CHIRIP | Stratovolcanoes | Historical | Kuril Islands |
| CHIRIPNAPUI (CHIRIPNUPURI) | Synonym of CHIRIP | Kuril Islands | |
| CHIRIPORUPURI (CHIRIPPU-DAKE) | Synonym of CHIRIP | Kuril Islands | |
| CHIRIQUI, VOLCAN DE | Synonym of BARU | Panamá | |
| CHIRPOI | Caldera | Historical | Kuril Islands |
| CHIRRIQUI | Synonym of BARU | Panamá | |
| CHISENUPURI | Dome of NISEKO | Hokkaido | |
| CHISHIMA-IWO-ZAN | Synonym of EBEKO | Kuril Islands | |
| CHISNY, PITON | Cinder cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| CHITRA-CALOBRE | Synonym of YEGUADA, LA | Panamá | |
| CHITU | Maar of O'A CALDERA | Africa (northeastern) & Red Sea | |
| CHIUCHAM, CERRO | Dome of SANTO TOMAS | Guatemala | |
| CHIVATO, VOLCAN | Cone of DESCABEZADO GRANDE | Central Chile & Argentina | |
| CHIVO, CERRO | Cone of SAN CRISTOBAL | Galápagos Islands | |
| CHIVO, CERRO EL | Cone of PINACATE | México | |
| CHIVO, LOMA EL | Dome of PULULAGUA | Ecuador | |
| CHOASCHEN | Synonym of ICHINSKY | Kamchatka Peninsula | |
| CHOCOLATE, CERRO [CERRO COLORADO] | Dome of ILOPANGO | El Salvador & Honduras | |
| CHOCOSUELA | Pleistocene caldera of PLATANAR | Costa Rica | |
| CHODUECO (CHODUANPIRE) | Synonym of OSORNO | Southern Chile & Argentina | |
| CHOJOCHONGEN | Synonym of KHODUTKA | Kamchatka Peninsula | |
| CHOKAI | Stratovolcanoes | Historical | Honshu |
| CHOKAI-SAN | Synonym of CHOKAI | Honshu | |
| CHOLOMDYK (CHOLOMDIK) | Cinder cone of UDOKAN PLATEAU | Russia (southeastern) | |
| CHOME | Crater of LLAIMA | Central Chile & Argentina | |
| CHOMPIPE, CERRO | Stratovolcano of BARVA | Costa Rica | |
| CH'ON-JI [TIANCHI] | Caldera of CHANGBAISHAN | China (eastern) | |
| CHONAJTAJUYUB, CERRO | Dome of SANTO TOMAS | Guatemala | |
| CHONCE, EL [VOLCAN EL CHONCO] | Stratovolcano of SAN CRISTOBAL | Nicaragua | |
| CHONCLE [VOLCAN EL CHONCO] | Stratovolcano of SAN CRISTOBAL | Nicaragua | |
| CHONCO, VOLCAN EL | Stratovolcano of SAN CRISTOBAL | Nicaragua | |
| CHONI | Dome of METHANA | Greece | |
| CHOOGARYONG | Synonym of CH'UGA-RYONG | Korea | |
| CHOPINE, PUY | Dome of CHAINE DES PUYS | Western Europe | |
| CHORNY | Synonym of CHERNY | Kamchatka Peninsula | |
| CHOSHICHIRO-YAMA | Dome of AKAGI | Honshu | |
| CHOSHUENCO | Stratovolcano of MOCHO-CHOSHUENCO | Central Chile & Argentina | |
| CHOSHUENCO-EL MOCHO | Synonym of MOCHO-CHOSHUENCO | Central Chile & Argentina | |
| CHOSHUENCO-PILLAN | Synonym of MOCHO-CHOSHUENCO | Central Chile & Argentina | |
| CHOUNGOU-CHAGNOUMENI | Pit crater of KARTHALA | Indian Ocean (western) | |
| CHOUNGOU-CHAHALE | Pit crater of KARTHALA | Indian Ocean (western) | |
| CHOUNGOU-CHAMADJI | Crater of KARTHALA | Indian Ocean (western) | |
| CHOUPANOV | Synonym of ZHUPANOVSKY | Kamchatka Peninsula | |
| CHOWDER RIDGE | Stratovolcano of BAKER | USA (Washington) | |
| CHRISTENSEN NUNATAK | Cone of SEAL NUNATAKS GROUP | Antarctica & South Sandwich Islands | |
| CHRISTMAS | Former crater of WHITE ISLAND | New Zealand | |
| CHUBBE, JABAL | Crater of ARHAB, HARRA OF | Arabia | |
| CHUCAMITEPEQUE [LOMA LOS SIETE CERROS] | Cone of CHINGO | Guatemala | |
| CHUFQUEN, VOLCAN | Cone of SOLLIPULLI | Central Chile & Argentina | |
| CH'UGA-RYONG | Shield volcano | Holocene? | Korea |
| CHUGINADAK | Synonym of CLEVELAND | Aleutian Islands | |
| CHUGUL | Synonym of SEGULA | Aleutian Islands | |
| CHULUUT | Synonym of TARYATU-CHULUTU | Mongolia | |
| CHUN-PO | Synonym of TENGCHONG | Southeast Asia | |
| CHUNGURURU | Maar of KIEYO | Africa (eastern) | |
| CHUO-KAKOKYU | Cone of TOKACHI | Hokkaido | |
| CHUO-ZAO | Stratovolcano of ZAO | Honshu | |
| CHUPADERO | Crater of TECUAMBURRO | Guatemala | |
| CHUPIQUINA, NEVADO | Stratovolcano of TACORA | Northern Chile, Bolivia & Argentina | |
| CHURCHILL | Stratovolcano | Radiocarbon | Alaska (eastern) |
| CHURCHILL | Stratovolcano | Radiocarbon | Alaska (eastern) |
| CHUWERA | Crater of BUNYARUGURU | Africa (central) | |
| CHYORNOGO | Synonym of CHIRPOI | Kuril Islands | |
| CHYULU HILLS | Volcanic field | Anthropology | Africa (eastern) |
| CIAMPINO | Crater of ALBAN HILLS | Italy | |
| CIATUR | Thermal Feature of TANGKUBANPARAHU | Java | |
| CIBEUREUM | Thermal Feature of PERBAKTI-GAGAK | Java | |
| CIBEUREUM | Thermal Feature of KAMOJANG, KAWAH | Java | |
| CIBEUREUM PALASARI | Thermal Feature of PERBAKTI-GAGAK | Java | |
| CIBODAS, CIPANAS | Thermal Feature of PERBAKTI-GAGAK | Java | |
| CIBODAS, KAWAH | Thermal Feature of PERBAKTI-GAGAK | Java | |
| CIBODAS, KAWAH | Thermal Feature of SALAK | Java | |
| CIBOLANG, KAWAH | Thermal Feature of WAYANG-WINDU | Java | |
| CIBUNI, KAWAH | Thermal Feature of PATUHA | Java | |
| CIBURIAL | Thermal Feature of KAMOJANG, KAWAH | Java | |
| CIEGA, LAGUNA | Vent of SAN SALVADOR | El Salvador & Honduras | |
| CIEGA, LAGUNA | Stratovolcano of TECAPA | El Salvador & Honduras | |
| CIEGO, MONTAÑA | Cinder cone of TENERIFE | Canary Islands | |
| CIGAMEA, KAWAH | Thermal Feature of SALAK | Java | |
| CIGLIANO | Crater of CAMPI FLEGREI | Italy | |
| CIGLIO | Cone of ISCHIA | Italy | |
| CIGUATEPE, CERRO EL | Stratovolcano | Holocene? | Nicaragua |
| CIGUPAKAN | Thermal Feature of KENDANG | Java | |
| CIHARUS | Stratovolcano of KAMOJANG, KAWAH | Java | |
| CIHIDEUNG, CIPANAS | Thermal Feature of SALAK | Java | |
| CIKALUWUNG PUTRI, KAWAH | Thermal Feature of SALAK | Java | |
| CIKALUWUNG, CIPANAS | Thermal Feature of PERBAKTI-GAGAK | Java | |
| CIKALUWUNGHERANG, KAWAH | Thermal Feature of PERBAKTI-GAGAK | Java | |
| CILEKATAN, GUNUNG | Cone of SLAMET | Java | |
| CILIK, GUNUNG | Cone of SLAMET | Java | |
| CILIK, GUNUNG | Cone of IJEN | Java | |
| CIMOTOE | Submarine vent of CAMPI FLEGREI MAR SICILIA | Italy | |
| CINCO PICOS | Shield volcano of TERCEIRA | Azores | |
| CINDER BUTTE | Cone of MEDICINE LAKE | USA (California) | |
| CINDER CLIFF | Cone of EDZIZA | Canada | |
| CINDER CONE | Cinder cone of SHASTA | USA (California) | |
| CINDER CONE | Cinder cone of MEDICINE LAKE | USA (California) | |
| CINDER CONE | Cinder cone of LASSEN VOLCANIC CENTER | USA (California) | |
| CINDER CONE, THE | Cone of GARIBALDI LAKE | Canada | |
| CINDER HILL | Cone of NEWBERRY | USA (Oregon) | |
| CINDER HILLS | Cone of KILAUEA | Hawaiian Islands | |
| CINDER MOUNTAIN | Cone of ISKUT-UNUK RIVER CONES | Canada | |
| CINNAMON BUTTE | Cinder cones | Holocene? | USA (Oregon) |
| CINOTEPEC, CERRO | Synonym of CINOTEPEQUE, CERRO | El Salvador & Honduras | |
| CINOTEPEQUE, CERRO | Volcanic field | Holocene | El Salvador & Honduras |
| CINOTEPEQUE, CERRO | Volcanic field | Holocene | El Salvador & Honduras |
| CINQUE DENTI | Pleistocene caldera of PANTELLERIA | Italy | |
| CINTRAO | Dome of AGUA DE PAU | Azores | |
| CIOTHIRAI | Cone of NYAMBENI HILLS | Africa (eastern) | |
| CIPAMATUTAN | Thermal Feature of PERBAKTI-GAGAK | Java | |
| CIPANAS | See proper name (e.g. CIBODAS, CIPANAS) | Indonesian for HOT SPRINGS | |
| CIPANAS, KAWAH | Thermal Feature of SALAK | Java | |
| CIPENGASAHAN, KAWAH | Thermal Feature of KAMOJANG, KAWAH | Java | |
| CIREMAI | Synonym of CEREME | Java | |
| CIS, MOUNT | Cone of EREBUS | Antarctica & South Sandwich Islands | |
| CISALADA, CIPANAS | Thermal Feature of SALAK | Java | |
| CISALADA, KAWAH | Thermal Feature of SALAK | Java | |
| CISEKATI, CIPANAS | Thermal Feature of PERBAKTI-GAGAK | Java | |
| CISEUPAN, CIPANAS | Thermal Feature of PERBAKTI-GAGAK | Java | |
| CISNE, NEVADO EL | Dome of RUIZ, NEVADO DEL | Colombia | |
| CISTERNAZZA | Crater of ETNA | Italy | |
| CITERNE, CRATERE | Crater of KARTHALA | Indian Ocean (western) | |
| CITERNE, LA | Cinder cone of SOUFRIERE GUADELOUPE | West Indies | |
| CITLALTEPEC | Synonym of ORIZABA, PICO DE | México | |
| CITLALTEPETL | Synonym of ORIZABA, PICO DE | México | |
| CITRONS GALETS, PITON | Cinder cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| CIWIDEI, KAWAH | Thermal Feature of PATUHA | Java | |
| CLAMBAKE | Thermal Feature of GALAPAGOS RIFT | Pacific Ocean (eastern) | |
| CLAPEROLS, VOLCA | Cone of OLOT VOLCANIC FIELD | Western Europe | |
| CLARA PEAK | Shield volcano of VALLES CALDERA | USA (New Mexico) | |
| CLARA, LAGUNETA | Cinder cone of SAN DIEGO | El Salvador & Honduras | |
| CLARA, MONTANA | Cone of LANZAROTE | Canary Islands | |
| CLARK | Submarine volcano | Fumarolic | New Zealand |
| CLAY, MT. | Cone of NEWER VOLCANICS PROV | Australia | |
| CLEAR LAKE | Volcanic field | Holocene | USA (California) |
| CLEARWATER CONE GROUP | Synonym of WELLS GRAY-CLEARWATER | Canada | |
| CLEETWOOD | Vent of CRATER LAKE | USA (Oregon) | |
| CLEFT SEGMENT | Submarine volcano | Historical | Pacific Ocean (northern) |
| CLERIGO DUARTE, MONTANA DEL [VOLCAN TAO] | Cone of LANZAROTE | Canary Islands | |
| CLERMONT CHAMALIERES | Maar of CHAINE DES PUYS | Western Europe | |
| CLEVELAND | Stratovolcano | Historical | Aleutian Islands |
| CLIERZOU | Dome of CHAINE DES PUYS | Western Europe | |
| CLINKER PEAK | Stratovolcano of GARIBALDI LAKE | Canada | |
| COATEPEQUE CALDERA | Caldera | Holocene | El Salvador & Honduras |
| COATS CALDERA | Caldera of YUNASKA | Aleutian Islands | |
| COAXIAL SEGMENT | Submarine volcano | Historical | Pacific Ocean (northern) |
| COAXUSCO | Cinder cone of CHICHINAUTZIN | México | |
| COBA NEGRA | Pleistocene caldera of GALERAS | Colombia | |
| COBB MOUNTAIN | Cone of CLEAR LAKE | USA (California) | |
| COBB SEGMENT | Submarine volcano | Uranium-series | Pacific Ocean (northern) |
| COCHA I, LA | Dome of ATACAZO | Ecuador | |
| COCHA II, LA | Dome of ATACAZO | Ecuador | |
| COCHAGUE | Synonym of CONCHAGUA | El Salvador & Honduras | |
| COCHAPAMPA, CERRO | Cinder cone of ANDAHUA-ORCOPAMPA | Perú | |
| COCHAPATA | Dome of CHACHIMBIRO | Ecuador | |
| COCHIQUITO VOLCANIC GROUP | Stratovolcanoes | Holocene | Central Chile & Argentina |
| COCHIQUITO, VOLCAN | Stratovolcano of COCHIQUITO VOLCANIC GROUP | Central Chile & Argentina | |
| COCHONS, ILE AUX | Stratovolcano | Holocene | Indian Ocean (southern) |
| COCHONS, PITON DES | Cinder cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| COCO, PITON DE | Cinder cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| COCOA | Crater of EDZIZA | Canada | |
| COCONUCOS, LOS | Cone of PURACE | Colombia | |
| COCONUSCOS-AGUAS HERVIENDO | Thermal Feature of PURACE | Colombia | |
| COCONUSCOS-AGUAS TIBIAS | Thermal Feature of PURACE | Colombia | |
| COFFEE | Crater of EDZIZA | Canada | |
| COFFEEPOT CRATER | Crater of JORDAN CRATERS | USA (Oregon) | |
| COFRE DE PEROTE | Shield volcanoes | Radiocarbon | México |
| COGON | Dome of LABO | Luzon | |
| COHUAZALO, VOLCAN | Cone of CHICHINAUTZIN | México | |
| COIGUE | Crater of LLAIMA | Central Chile & Argentina | |
| COJUTEPEQUE | Synonym of ILOPANGO | El Salvador & Honduras | |
| COLACHI | Stratovolcano | Holocene | Northern Chile, Bolivia & Argentina |
| COLADA DENDRIFORME [CRATERES DE LOS BANOS] | Dome of MAULE, LAGUNA DEL | Central Chile & Argentina | |
| COLADA LAS NIEBLAS | Dome of MAULE, LAGUNA DEL | Central Chile & Argentina | |
| COLADO OCCIDENTAL | Dome of MAULE, LAGUNA DEL | Central Chile & Argentina | |
| COLANGAL, CERRO | Dome of MOJANDA | Ecuador | |
| COLARDEAU, FUMEROLLES | Thermal Feature of SOUFRIERE GUADELOUPE | West Indies | |
| COLD BAY VOLC CENTER | Synonym of FROSTY | Alaska Peninsula | |
| COLEMAN SEAMOUNT | Submarine volcano | Holocene | Bougainville & Solomon Islands |
| COLIMA | Stratovolcanoes | Historical | México |
| COLIMA, NEVADO DE | Stratovolcano of COLIMA | México | |
| COLLAQUI | Synonym of CALLAQUI | Central Chile & Argentina | |
| COLLE IANO | Cinder cone of ALBAN HILLS | Italy | |
| COLLE MARGHERITA | Dome of VESUVIUS | Italy | |
| COLLE ROTONDELLA | Dome of CAMPI FLEGREI | Italy | |
| COLLE UMBERTO | Dome of VESUVIUS | Italy | |
| COLLI ALBANI | Synonym of ALBAN HILLS | Italy | |
| COLLI LAZIALE | Synonym of ALBAN HILLS | Italy | |
| COLLI, CERRO EL | Dome of PRIMAVERA, SIERRA LA | México | |
| COLLIER CONE | Cinder cone of NORTH SISTER FIELD | USA (Oregon) | |
| COLO [UNA UNA] | Stratovolcano | Historical | Sulawesi |
| COLOCI [TAULEVU] | Cone of TAVEUNI | Fiji Islands | |
| COLOMBO BANK | Maar of SANTORINI | Greece | |
| COLOOT | Synonym of KELUT | Java | |
| COLORADA, CALDERA | Cinder cone of LANZAROTE | Canary Islands | |
| COLORADA, MONTANA [MONTANA RODEOS] | Cinder cone of LANZAROTE | Canary Islands | |
| COLORADAS, LOMAS | Cinder cone of SOCORRO | México | |
| COLORADO | Crater of LLAIMA | Central Chile & Argentina | |
| COLORADO | Cone of ANTILLANCA GROUP | Central Chile & Argentina | |
| COLORADO | Cinder cone of PALEI-AIKE VOLCANIC FIELD | Southern Chile & Argentina | |
| COLORADO, CERRO | Cone of ZUNI-BANDERA | USA (New Mexico) | |
| COLORADO, CERRO | Tuff ring of PINACATE | México | |
| COLORADO, CERRO | Cinder cone of COFRE DE PEROTE | México | |
| COLORADO, CERRO | Dome of ILOPANGO | El Salvador & Honduras | |
| COLORADO, CERRO | Stratovolcano of MOMOTOMBO | Nicaragua | |
| COLORADO, CERRO | Cone of SAIRECABUR | Northern Chile, Bolivia & Argentina | |
| COLORADO, CERRO | Cone of CALABOZOS | Central Chile & Argentina | |
| COLORADO, CERRO | Cone of CHILLAN, NEVADOS DE | Central Chile & Argentina | |
| COLUMBA, VOLCAN | Cone of CALATRAVA VOLCANIC FIELD | Western Europe | |
| COLUMBIA CREST | Crater of RAINIER | USA (Washington) | |
| COLUMBO BANK [COLOMBO BANK] | Maar of SANTORINI | Greece | |
| COLUMNAR PEAK | Dome of GARIBALDI | Canada | |
| COMAL CHICO | Cinder cone of COLIMA | México | |
| COMAL GRANDE | Cinder cone of COLIMA | México | |
| COMALITO | Cinder cone of MASAYA | Nicaragua | |
| COMBEGRASSE, PUY DE | Cone of CHAINE DES PUYS | Western Europe | |
| COME, PUY DE | Cone of CHAINE DES PUYS | Western Europe | |
| COMMERSON, CRATERE | Cinder cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| COMONDU-LA PURISIMA | Volcanic field | Holocene? | México |
| COMPANA, CERRO LA | Cone of ZITACUARO-VALLE DE BRAVO | México | |
| COMPANIA, CERRO | Cinder cone of CHINGO | Guatemala | |
| COMPANY BUTTE | Cone of NEWBERRY | USA (Oregon) | |
| COMPETRI, MONTE | Cone of ALBAN HILLS | Italy | |
| COMUNIDAD | Cone of ZITACUARO-VALLE DE BRAVO | México | |
| CONACASTE, CERRO [CERRO CHACHACASTE] | Dome of ILOPANGO | El Salvador & Honduras | |
| CONCEPCION | Stratovolcano | Historical | Nicaragua |
| CONCEPCION | Cone of BARVA | Costa Rica | |
| CONCEPCION DE ATACO | Pit crater of APANECA RANGE | El Salvador & Honduras | |
| CONCHA, LA | Fissure vent of CONCEPCION | Nicaragua | |
| CONCHAGUA | Stratovolcano | Uncertain | El Salvador & Honduras |
| CONCHAGUA ISLAND | Synonym of CONCHAGUITA | El Salvador & Honduras | |
| CONCHAGUITA | Stratovolcano | Historical | El Salvador & Honduras |
| CONCOLA | Crater of CAMPI FLEGREI | Italy | |
| CONCORDIA, CERRO LA GGUARAZI] | Cinder cone of BARVA | Costa Rica | |
| CONDON BUTTE | Cinder cone of NORTH SISTER FIELD | USA (Oregon) | |
| CONDOR, CERRO | Stratovolcano of ANTUCO | Central Chile & Argentina | |
| CONDOR, CERRO EL | Stratovolcano | Holocene | Northern Chile, Bolivia & Argentina |
| CONDRODIMUKO | Thermal Feature of DIENG VOLCANIC COMPLEX | Java | |
| CONDRODIMUKO, KAWAH | Thermal Feature of MERBABU | Java | |
| CONE CRATER | Cone of KILAUEA | Hawaiian Islands | |
| CONE GLACIER | Cone of ISKUT-UNUK RIVER CONES | Canada | |
| CONE HILL | Fissure vent of ST. PAUL ISLAND | Alaska (western) | |
| CONE PEAK | Cone of KILAUEA | Hawaiian Islands | |
| CONE PLACE | Cone of KILIMANJARO | Africa (eastern) | |
| CONEJAL, CERRO EL | Cinder cone of SANTA ANA | El Salvador & Honduras | |
| CONEJOS, MONTANAS DE LOS | Vent of TENERIFE | Canary Islands | |
| CONGO, CERRO | Stratovolcano of POAS | Costa Rica | |
| CONGO, VOLCAN | Synonym of PLATANAR | Costa Rica | |
| CONGRESS | Former crater of WHITE ISLAND | New Zealand | |
| CONGRO, LAGOA DO | Maar of AGUA DE PAU | Azores | |
| CONGUACO, CERRO | Crater of MOYUTA | Guatemala | |
| CONGUILLIO GROUP | Crater of LLAIMA | Central Chile & Argentina | |
| CONIL, MONT | Stratovolcano of PELEE | West Indies | |
| CONNECTED ISLAND | Cone of ZUBAIR, JEBEL | Africa (northeastern) & Red Sea | |
| CONTE VIDUA SOLFATARA FIELD | Thermal Feature of TONDANO CALDERA | Sulawesi | |
| CONTE, LE | Cinder cone of SOUTH SISTER | USA (Oregon) | |
| CONTODOC [CANTOLOC] | Stratovolcano of CABALIAN | Central Philippines | |
| CONTRADA CAFFEFI, CUDDIOLI DI | Vent of PANTELLERIA | Italy | |
| CONTRADA MURERA | Crater of CAMPI FLEGREI | Italy | |
| CONTRERAS, CERRO | Cinder cone of CRATER BASALT VOLCANIC FIELD | Southern Chile & Argentina | |
| CONVENTILIO, CERRO | Cone of SAN DIEGO | El Salvador & Honduras | |
| COOK ISLAND | Submarine vent of THULE ISLANDS | Antarctica & South Sandwich Islands | |
| COOK, VOLCAN | Synonym of FUEGUINO | Southern Chile & Argentina | |
| COOPER KNOLL | Cone of MARKAGUNT PLATEAU | USA (Utah) | |
| COPACOYA, GEISERS DE | Synonym of TATIO, EL | Northern Chile, Bolivia & Argentina | |
| COPAHUE | Stratovolcano | Historical | Central Chile & Argentina |
| COPAHUE, BANOS | Thermal Feature of COPAHUE | Central Chile & Argentina | |
| COPAHUES, LOS | Synonym of COPAHUE | Central Chile & Argentina | |
| COPETE, EL | Dome of REVENTADOR | Ecuador | |
| COPIAPO | Stratovolcano | Uncertain | Northern Chile, Bolivia & Argentina |
| COPITIRO, CERRO DE | Cinder cone of MICHOACAN-GUANAJUATO | México | |
| COPORITO, CERRO EL | Cone of ZITACUARO-VALLE DE BRAVO | México | |
| COQUILLE, PUY DE LA | Cone of CHAINE DES PUYS | Western Europe | |
| CORA | Maar of ERCIYES DAGI | Turkey | |
| CORAGULAC, LAKE | Tuff ring of NEWER VOLCANICS PROV | Australia | |
| CORAZONCILLO, CALDERA DEL | Crater of LANZAROTE | Canary Islands | |
| CORBETTI CALDERA | Caldera | Holocene | Africa (northeastern) & Red Sea |
| CORCOBADO | Synonym of CORCOVADO | Southern Chile & Argentina | |
| CORCOVADO | Stratovolcano | Historical | Southern Chile & Argentina |
| CORDEMOY, CRATERE DE | Crater of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| CORDILLERA BLANCA | Synonym of CALLAQUI | Central Chile & Argentina | |
| CORDILLERA DEL PEDREGAL [CORDON CAULLE] | Fissure vent of PUYEHUE-CORDON CAULLE | Central Chile & Argentina | |
| CORDILLERA DORSAL | Fissure vent of TENERIFE | Canary Islands | |
| CORDILLERA NEVADA | Caldera of PUYEHUE-CORDON CAULLE | Central Chile & Argentina | |
| CORDILLERA PELADA [CORDON CAULLE] | Fissure vent of PUYEHUE-CORDON CAULLE | Central Chile & Argentina | |
| CORDON CAULLE | Fissure vent of PUYEHUE-CORDON CAULLE | Central Chile & Argentina | |
| CORDON CENIZOS | Cone of PUNTIAGUDO-CORDON CENIZOS | Central Chile & Argentina | |
| CORDON DE ALVAREZ | Cone of ANTILLANCA GROUP | Central Chile & Argentina | |
| CORDON DE PUNTAS NEGRAS | Stratovolcanoes | Holocene | Northern Chile, Bolivia & Argentina |
| CORDON DEL AZUFRE | Complex volcano | Holocene | Northern Chile, Bolivia & Argentina |
| CORDON EL CAUYE | Synonym of PUNTIAGUDO-CORDON CENIZOS | Central Chile & Argentina | |
| CORERO DE LA CHARCA, CERRO | Dome of YEGUADA, LA | Panamá | |
| CORINTH HEAD | Cone of HEARD | Indian Ocean (southern) | |
| CORNO DE BELLARIA | Dome of AMIATA | Italy | |
| CORONA, LA [LA CALDERETA] | Crater of TENERIFE | Canary Islands | |
| CORONA, MONTE | Cone of LANZAROTE | Canary Islands | |
| CORONADO | Stratovolcano | Fumarolic | México |
| COROPUNA | Stratovolcano | Holocene | Perú |
| COROZAL VIEJO, EL | Cone of MADERAS | Nicaragua | |
| CORRAL KNOLL [BLACK KNOLL] | Cinder cone of BALD KNOLL | USA (Utah) | |
| CORRAL QUEMADO [RININAHUE] | Maar of CARRAN-LOS VENADOS | Central Chile & Argentina | |
| CORRALES, MONTANA | Cone of TENERIFE | Canary Islands | |
| CORRAO [GIULIA-FERDINANDEO] | Submarine vent of CAMPI FLEGREI MAR SICILIA | Italy | |
| CORTADERAL, CERRO EL | Fissure vent of CHACHANI, NEVADO | Perú | |
| CORTADERAS, LAS [PAMPA DE PALACIO] | Shield volcano of CHACHANI, NEVADO | Perú | |
| CORVO | Stratovolcano | Holocene | Azores |
| COS | Synonym of KOS | Greece | |
| COSEGUINA | Synonym of COSIGUINA | Nicaragua | |
| COSIGUINA | Stratovolcano | Historical | Nicaragua |
| COSO HOT SPRINGS | Thermal Feature of COSO VOLCANIC FIELD | USA (California) | |
| COSO RANGE | Synonym of COSO VOLCANIC FIELD | USA (California) | |
| COSO VOLCANIC FIELD | Lava domes | Holocene? | USA (California) |
| COSTA D'AGOSTO | Stratovolcano of LIPARI | Italy | |
| COSTA DE LENZUOLA | Crater of ISCHIA | Italy | |
| COSTA RICA, VOLCAN | Synonym of ARENAL | Costa Rica | |
| COSTA SPARAINA | Dome of ISCHIA | Italy | |
| COSTA, PUIG DE LA | Cone of OLOT VOLCANIC FIELD | Western Europe | |
| COSTE SAN DOMENICO | Crater of CAMPI FLEGREI | Italy | |
| COSTO MAAR | Maar of MICHOACAN-GUANAJUATO | México | |
| COTJI, CERRO [COSTO MAAR] | Maar of MICHOACAN-GUANAJUATO | México | |
| COTOPAXI | Stratovolcano | Historical | Ecuador |
| COTTERIL, MT. | Cone of NEWER VOLCANICS PROV | Australia | |
| COTTO BARANO, MT. | Cone of ISCHIA | Italy | |
| COTTO, MONTE | Cone of ISCHIA | Italy | |
| COTTON VOLCANO | Stratovolcano of HEALY | New Zealand | |
| COTTONWOOD PEAK | Cone of TUYA VOLCANIC FIELD | Canada | |
| COUGAR BUTTE | Cone of MEDICINE LAKE | USA (California) | |
| COVA DA BURRA [PICO DA AREIA] | Dome of FURNAS | Azores | |
| COVA, PICO DO | Cone of PICOS VOLCANIC SYSTEM | Azores | |
| COW HILL SOUFRIERE [TAR RIVER SOUFRIERE] | Thermal Feature of SOUFRIERE HILLS | West Indies | |
| COW LAKES LAVA FIELD | Synonym of JORDAN CRATERS | USA (Oregon) | |
| COWLEY ISLAND | Fissure vent of ALCEDO | Galápagos Islands | |
| COYOLTEPEC | Cinder cone of CHICHINAUTZIN | México | |
| COYOTE BUTTE | Cone of CRATERS OF THE MOON | USA (Idaho) | |
| COYOTEPE, CERRO EL | Cinder cone of MASAYA | Nicaragua | |
| COYOTES, CERRO LOS | Cone of SAN DIEGO | El Salvador & Honduras | |
| CRABIER, MORNE | Dome of PLAT PAYS, MORNE | West Indies | |
| CRAC, PITON DE | Cinder cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| CRACATOA | Synonym of KRAKATAU | Krakatau | |
| CRACKER CREEK CONE | Cone of ATLIN VOLCANIC FIELD | Canada | |
| CRATER | See proper name (e.g. CITERNE, CRATER) | ||
| CRATER BASALT VOLCANIC FIELD | Cinder cones | Holocene | Southern Chile & Argentina |
| CRATER BUTTES | Cone of NEWBERRY | USA (Oregon) | |
| CRATER DOME | Dome of OKATAINA | New Zealand | |
| CRATER FOREST | Cinder cone of JINGBO | China (eastern) | |
| CRATER HILL | Tuff cone of AUCKLAND FIELD | New Zealand | |
| CRATER HILL | Cinder cone of ST. PAUL ISLAND | Alaska (western) | |
| CRATER LAKE | Crater of RUAPEHU | New Zealand | |
| CRATER LAKE | Caldera | Radiocarbon | USA (Oregon) |
| CRATER LAKE | Crater of DECEPTION ISLAND | Antarctica & South Sandwich Islands | |
| CRATER MOUNTAIN | Stratovolcano | Holocene? | New Guinea & D'Entrecasteaux Islands |
| CRATER MOUNTAIN | Cone of ST. MICHAEL | Alaska (western) | |
| CRATER MOUNTAIN | Dome of MONO CRATERS | USA (California) | |
| CRATER PEAK | Stratovolcano of SPURR | Alaska (southwestern) | |
| CRATER PEAK | Cone of CRATER LAKE | USA (Oregon) | |
| CRATER RIDGE | Dome of EDGECUMBE | Alaska (eastern) | |
| CRATER ROCK | Dome of HOOD | USA (Oregon) | |
| CRATER SE SPRINGS | Thermal Feature of PINATUBO | Luzon | |
| CRATER TOP | Dome of SHIVELUCH | Kamchatka Peninsula | |
| CRATERE | See proper name (e.g. BEAUNIT, CRATERE DE) | French for CRATER | |
| CRATERED DOME | Dome of MONO CRATERS | USA (California) | |
| CRATERES, MONTE DE | Cone of POSSESSION, ILE DE LA | Indian Ocean (southern) | |
| CRATERS OF THE MOON | Thermal Feature of MAROA | New Zealand | |
| CRATERS OF THE MOON | Cinder cones | Radiocarbon | USA (Idaho) |
| CRAVEN, MT. | Dome of ST. CATHERINE | West Indies | |
| CRAWFORD BAY | Tuff cone of MARION ISLAND | Indian Ocean (southern) | |
| CRESCENT | Crater of BLACK ROCK DESERT | USA (Utah) | |
| CRESCENT BUTTE | Cone of MEDICINE LAKE | USA (California) | |
| CRESCENT BUTTE | Cinder cone of CRATERS OF THE MOON | USA (Idaho) | |
| CRESCENT CRATER | Crater of LASSEN VOLCANIC CENTER | USA (California) | |
| CRESCENT, THE | Tuff ring of NAMARUNU | Africa (eastern) | |
| CRESPO, CERRO [CERRO QUEMADO] | Dome of ALMOLONGA | Guatemala | |
| CRISTAL | Dome of GUAGUA PICHINCHA | Ecuador | |
| CRISTO REY | Cinder cone of NEGRO, CERRO | Nicaragua | |
| CROCKER, MT. | Cone of SANTA CRUZ | Galápagos Islands | |
| CROCODILE ISLAND | Synonym of CENTRAL ISLAND | Africa (eastern) | |
| CROCODILE LAKE | Crater of CENTRAL ISLAND | Africa (eastern) | |
| CROCODRILOS, LAGUNA | Maar of SAN MARTIN | México | |
| CROSCAT, VOLCA | Cone of OLOT VOLCANIC FIELD | Western Europe | |
| CROSS HILL | Crater of DECEPTION ISLAND | Antarctica & South Sandwich Islands | |
| CROW LAGOON | Pyroclastic cone | Holocene | Canada |
| CRUCES, CERRO LAS | Cinder cone of SANTA ANA | El Salvador & Honduras | |
| CRUZ DE TEA, MONTANA LA | Cone of TENERIFE | Canary Islands | |
| CRUZ, CERRO LA | Cinder cone of ZITACUARO-VALLE DE BRAVO | México | |
| CRUZ, CERRO LA | Cinder cone of ANDAHUA-ORCOPAMPA | Perú | |
| CRUZ, MONTANA DE LA | Dome of TENERIFE | Canary Islands | |
| CRUZ, MONTANA LA | Cinder cone of TENERIFE | Canary Islands | |
| CRUZ, MONTE DE LA | Cinder cone of BARVA | Costa Rica | |
| CRUZ, PICO DA | Cone of SETE CIDADES | Azores | |
| CRUZ, PICO DO | Cone of PICOS VOLCANIC SYSTEM | Azores | |
| CRYDER BUTTE | Shield volcano of DAVIS LAKE | USA (Oregon) | |
| CU-LAO BO BAI | Cone of CU-LAO RE GROUP | Southeast Asia | |
| CU-LAO RE GROUP | Volcanic field | Holocene | Southeast Asia |
| CUADRADO, MOUNT | Dome of PINATUBO | Luzon | |
| CUALTA, LA | Dome of ZITACUARO-VALLE DE BRAVO | México | |
| CUATEPETL, VOLCAN | Cinder cone of CHICHINAUTZIN | México | |
| CUATES, CERRO LOS | Crater of PINACATE | México | |
| CUATES, CERROS | Shield volcano of MICHOACAN-GUANAJUATO | México | |
| CUAUATL | Cinder cone of CHICHINAUTZIN | México | |
| CUAUHTEMOC | Cinder cone of COLIMA | México | |
| CUAUTZIN | Shield volcano of CHICHINAUTZIN | México | |
| CUBILCHE, LOMA | Dome of IMBABURA | Ecuador | |
| CUCHUCAVI | Synonym of MINCHINMAVIDA | Southern Chile & Argentina | |
| CUCUNDICATA, CERRO | Cinder cone of MICHOACAN-GUANAJUATO | México | |
| CUDDIA / CUDDIE | See proper name (e.g. ROSSE, CUDDIA DEL) | Italian for HILL | |
| CUDDIOLI | See proper name (e.g. DIETRO ISOLA, CUDDIOLI DI) | Italian for HILL | |
| CUERIZI [GUARARI] | Cinder cone of BARVA | Costa Rica | |
| CUERNOS DE NEGROS | Complex volcano | Fumarolic | Central Philippines |
| CUERNOS DEL DIABLO | Stratovolcano | Holocene | Southern Chile & Argentina |
| CUERVO, THE [CALDERA DE LOS LAPAS] | Cinder cone of LANZAROTE | Canary Islands | |
| CUERVOS, CALDERA DE LOS [CALDERA LAPAS] | Cinder cone of LANZAROTE | Canary Islands | |
| CUERVOS, LOS | Cinder cone of CHILLAN, NEVADOS DE | Central Chile & Argentina | |
| CUERVOS, MONTANA DE LOS [CALDERA LAPAS] | Cinder cone of LANZAROTE | Canary Islands | |
| CUESTA DEL GUAYABO | Cinder cone of SUCHITAN | Guatemala | |
| CUESTA, CERRO LA | Dome of PRIMAVERA, SIERRA LA | México | |
| CUEVAS NEGRAS, MONTANA | Fissure vent of TENERIFE | Canary Islands | |
| CUEVAS, MONTANA DE LAS | Cinder cone of HIERRO | Canary Islands | |
| CUEVAS, VOLCAN LAS | Maar of CALATRAVA VOLCANIC FIELD | Western Europe | |
| CUEVOS DEL RATON, VOLCAN | Fissure vent of TENERIFE | Canary Islands | |
| CUGNO DI MANDRA | Stratovolcano of LIPARI | Italy | |
| CUICOCHA | Caldera | Radiocarbon | Ecuador |
| CUIDAD ARCE, CERRITO | Dome of COATEPEQUE CALDERA | El Salvador & Honduras | |
| CUIDAD GUZMAN, VOLCAN DE [NEVADO DE COLIMA] | Stratovolcano of COLIMA | México | |
| CUILAPA SUR, CERRO | Cinder cone of CUILAPA-BARBARENA | Guatemala | |
| CUILAPA, VOLCAN | Cinder cone of CUILAPA-BARBARENA | Guatemala | |
| CUILAPA-BARBARENA | Volcanic field | Holocene | Guatemala |
| CUIPILAPA | Synonym of MIRAVALLES | Costa Rica | |
| CULEBRA, LOMA LA | Cinder cone of SAN DIEGO | El Salvador & Honduras | |
| CULEBRAS BANK ? | Synonym of FALCON ISLAND | Tonga Islands | |
| CULEBREADO, CERRO EL | Dome of PRIMAVERA, SIERRA LA | México | |
| CULIACAN | Maar of MICHOACAN-GUANAJUATO | México | |
| CULIACAN, CERRO | Shield volcano of MICHOACAN-GUANAJUATO | México | |
| CULMA, VOLCAN | Cinder cone of SANTIAGO, CERRO | Guatemala | |
| CUMA | Dome of CAMPI FLEGREI | Italy | |
| CUMBAL | Stratovolcano | Historical | Colombia |
| CUMBAL, NEVADO DE | Synonym of CUMBAL | Colombia | |
| CUMBRE DE LA LINEA | Cone of FALSO AZUFRE | Northern Chile, Bolivia & Argentina | |
| CUMBRE DEL LAUDO | Stratovolcano of NEVADA, SIERRA | Northern Chile, Bolivia & Argentina | |
| CUMBRE GRANDE, EL | Dome of CUMBRES, LAS | México | |
| CUMBRE VIEJA | Stratovolcano of LA PALMA | Canary Islands | |
| CUMBRE, CERRO LA | Cinder cone of APANECA RANGE | El Salvador & Honduras | |
| CUMBRE, LA | Synonym of FERNANDINA | Galápagos Islands | |
| CUMBRES, LAS | Stratovolcano | Radiocarbon | México |
| CUNISTEPEQUE, CERRO | Cinder cone of CHINGO | Guatemala | |
| CUNRU | Dome of IMBABURA | Ecuador | |
| CUPAHUE | Synonym of COPAHUE | Central Chile & Argentina | |
| CUPU, GUNUNG | Cone of LAMONGAN | Java | |
| CURA, BANOS DEL | Thermal Feature of ALMOLONGA | Guatemala | |
| CURACOA | Submarine volcano | Historical | Tonga Islands |
| CURIQUINCA, CERRO | Stratovolcano of SAIRECABUR | Northern Chile, Bolivia & Argentina | |
| CURITZERAN, CERRO DE | Cinder cone of MICHOACAN-GUANAJUATO | México | |
| CURRY, MOUNT | Submarine vent of ZAVODOVSKI | Antarctica & South Sandwich Islands | |
| CURTIS ISLAND | Submarine volcano | Uncertain | Kermadec Islands |
| CURUB | Synonym of KURUB | Africa (northeastern) & Red Sea | |
| CURUNGUEO | Cone of ZITACUARO-VALLE DE BRAVO | México | |
| CUSCACHAPA, LAGUNA DE | Pit crater of SANTA ANA | El Salvador & Honduras | |
| CUSCUNGO | Dome of ATACAZO | Ecuador | |
| CUSHNIRUMI | Stratovolcano of MOJANDA | Ecuador | |
| CUTZATO, CERRO DE | Cinder cone of MICHOACAN-GUANAJUATO | México | |
| CUVIGGHIUNI | Cinder cone of ETNA | Italy | |
| CUYANAUSUL | Synonym of APANECA RANGE | El Salvador & Honduras | |
| CUYANAUSUL, AUSOLES DE | Thermal Feature of APANECA RANGE | El Salvador & Honduras | |
| CUYOTEPE | Cone of APANECA RANGE | El Salvador & Honduras | |
| CUYUCUT | Thermal Feature of PINATUBO | Luzon | |
| CUYUFA | Synonym of SUMACO | Ecuador | |
| CWEAJAIN | Synonym of ICHINSKY | Kamchatka Peninsula | |
| D.D. CONE | Lava cone of AXIAL SEAMOUNT | Pacific Ocean (northern) | |
| DA ORE | Tuff ring of MANDA HARARO | Africa (northeastern) & Red Sea | |
| DAAM | Synonym of WURLALI | Banda Sea | |
| DABAYRA | Synonym of DABBAYRA | Africa (northeastern) & Red Sea | |
| DABBAHU | Stratovolcano | Historical | Africa (northeastern) & Red Sea |
| DABBAIRA [BOINA] | Cone of DABBAHU | Africa (northeastern) & Red Sea | |
| DABBAYRA | Shield volcano | Holocene | Africa (northeastern) & Red Sea |
| DABITA | Synonym of ADWA | Africa (northeastern) & Red Sea | |
| DABITA ALE | Synonym of HERTALI | Africa (northeastern) & Red Sea | |
| DACHT-I-NAVAR GROUP | Lava domes | Holocene? | Iran & Afghanistan |
| DACHT-I-NAWAR | Synonym of DACHT-I-NAVAR GROUP | Iran & Afghanistan | |
| DA'ENKEI | Crater of KOMAGA-TAKE | Hokkaido | |
| DAFNI | Dome of SANTORINI | Greece | |
| DAFTAN | Synonym of TAFTAN | Iran & Afghanistan | |
| DAGAN, JABAL | Crater of ARHAB, HARRA OF | Arabia | |
| DAGANPAO | Cinder cone of JINGBO | China (eastern) | |
| DAGATAN, LAKE | Maar of BANAHAW | Luzon | |
| DAGELET | Synonym of ULREUNG | Korea | |
| DAGNYHAUGEN | Cone of JAN MAYEN | Atlantic Ocean (Jan Mayen) | |
| DAGONGJIE | Cone of TENGCHONG | Southeast Asia | |
| DAGSA | Thermal Feature of PINATUBO | Luzon | |
| DAGUSHANZI [DAYISHAN] | Cone of LONGGANG GROUP | China (eastern) | |
| DAHEI SHAN | Cinder cone of KUNLUN VOLCANIC GROUP | China (western) | |
| DAHEI SHAN | Cinder cone of KUNLUN VOLCANIC GROUP | China (western) | |
| DAI-IO-SAN [TATARINOV] | Stratovolcano of CHIKURACHKI | Kuril Islands | |
| DAICHIGAMORI | Dome of KURIKOMA | Honshu | |
| DAIHANNYA-YAMA | Fissure vent of MIYAKE-JIMA | Izu, Volcano, & Mariana Islands | |
| DAIKOKU | Submarine volcano | Fumarolic | Izu, Volcano, & Mariana Islands |
| DAINICHI-DAKE | Synonym of KURIKOMA | Honshu | |
| DAINO-YAMA | Dome of IZU-TOBU | Honshu | |
| DAISETSU | Stratovolcanoes | Tephrochronology | Hokkaido |
| DAISETU-ZAN | Synonym of DAISETSU | Hokkaido | |
| DAITIMORI [DAICHIGAMORI] | Dome of KURIKOMA | Honshu | |
| DAITON GEOTHERMAL AREA | Thermal Feature of TATUN GROUP | Taiwan | |
| DAJIANHOUSHAN | Stratovolcano of TATUN GROUP | Taiwan | |
| DAKARA, GOF | Maar of MARSABIT | Africa (eastern) | |
| DAKATAUA | Caldera | Anthropology | New Britain |
| DAKELABAI (DAKELABALAI) | Synonym of CAMIGUIN DE BABUYANES | North of Luzon | |
| DAKONGSHAN | Cone of TENGCHONG | Southeast Asia | |
| DAKULA, MT. | Cinder cone of JOLO | Sulu Islands | |
| DAKUT | Cone of JOLO | Sulu Islands | |
| DALA FILLA | Synonym of DALAFFILLA | Africa (northeastern) & Red Sea | |
| DALAFFILLA | Stratovolcano | Holocene | Africa (northeastern) & Red Sea |
| DALAHRAUN | Crater Row of REYKJANES | Iceland (southwestern) | |
| DALAHUM | Cone of AMBRYM | Vanuatu | |
| DALELDAR | Crater Row of KRAFLA | Iceland (northeastern) | |
| DALFJALL | Fissure vent of KRAFLA | Iceland (northeastern) | |
| DALIUCHONG | Cone of TENGCHONG | Southeast Asia | |
| DALJNY PLOSKY | Shield volcano of USHKOVSKY | Kamchatka Peninsula | |
| DALLOL | Explosion craters | Historical | Africa (northeastern) & Red Sea |
| DALMAN | Cone of SEAL NUNATAKS GROUP | Antarctica & South Sandwich Islands | |
| DAL'NEE, LAKE [LAKE DALNY] | Maar of UZON | Kamchatka Peninsula | |
| DAL'NII PLOSKY [DALJNY PLOSKY] | Shield volcano of USHKOVSKY | Kamchatka Peninsula | |
| DALNY | Cone of BOLSHOI SEMIACHIK | Kamchatka Peninsula | |
| DALNY | Cinder cone of TOLBACHIK | Kamchatka Peninsula | |
| DALNY, LAKE | Maar of UZON | Kamchatka Peninsula | |
| DALNYAYA PLOSKY [DALJNY PLOSKY] | Shield volcano of USHKOVSKY | Kamchatka Peninsula | |
| DAL'NYEYE, LAKE [LAKE DALNY] | Maar of UZON | Kamchatka Peninsula | |
| DALONGWAN | Maar of LONGGANG GROUP | China (eastern) | |
| DALTON DOME | Dome of GARIBALDI | Canada | |
| DALY-TAPA | Synonym of DAR-ALAGES | Caucasus, Georgia & Armenia | |
| DAMA ALE | Synonym of DAMA ALI | Africa (northeastern) & Red Sea | |
| DAMA ALI | Shield volcano | Historical | Africa (northeastern) & Red Sea |
| DAMA HALI (DAMAHALE) | Synonym of DAMA ALI | Africa (northeastern) & Red Sea | |
| DAMAR | Synonym of WURLALI | Banda Sea | |
| DAMAVAND | Stratovolcano | Uranium-series | Iran & Afghanistan |
| DAMMER | Synonym of WURLALI | Banda Sea | |
| DAMPIER ISLAND | Synonym of KARKAR | Northeast of New Guinea | |
| DANA | Stratovolcano | Radiocarbon | Alaska Peninsula |
| DANAN | Thermal Feature of MAHAGNAO | Central Philippines | |
| DANAO, LAKE | Crater of MAHAGNAO | Central Philippines | |
| DANAU | See proper name (e.g. TALANG, DANAU) | Indonesian for LAKE | |
| DANAU | Pleistocene caldera of KARANG | Java | |
| DANBARU | Crater of KUJU | Ryukyu Islands & Kyushu | |
| DANGER BAY | Stratovolcano of CRATER LAKE | USA (Oregon) | |
| DANGEY | Thermal Feature of PINATUBO | Luzon | |
| D'ANGO, PITON | Cinder cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| DANGSANBONG | Tuff cone of HALLA | Korea | |
| DANKOLE | Cone of BISHOFTU VOLCANIC FIELD | Africa (northeastern) & Red Sea | |
| DANSAN | Tuff cone of HALLA | Korea | |
| DAR-ALAGES | Pyroclastic cones | Anthropology | Caucasus, Georgia & Armenia |
| DARAJAT | Thermal Feature of KENDANG | Java | |
| DARALAGES KETTE | Synonym of DAR-ALAGES | Caucasus, Georgia & Armenia | |
| DARALAGEZSKIY KHREBET | Synonym of DAR-ALAGES | Caucasus, Georgia & Armenia | |
| DARGO | Crater of KELUT | Java | |
| DARIGANGA VOLCANIC FIELD | Cinder cones | Holocene | Mongolia |
| DARNLEY, MOUNT | Cone of BRISTOL ISLAND | Antarctica & South Sandwich Islands | |
| DAROEGAN, RANOE [RANU DARUNGAN] | Maar of SEMERU | Java | |
| DARUNGAN, RANU | Maar of SEMERU | Java | |
| DARWIN | Shield volcano | Surface Exposure | Galápagos Islands |
| DARWIN BAY | Caldera of GENOVESA | Galápagos Islands | |
| DATIL, CERRO EL | Cinder cone of COMONDU-LA PURISIMA | México | |
| DATUN VOLCANO GROUP | Synonym of TATUN GROUP | Taiwan | |
| DATUNSHAN | Stratovolcano of TATUN GROUP | Taiwan | |
| DAUN, BUKIT | Stratovolcanoes | Fumarolic | Sumatra |
| DAUNER | Maar of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| DAUPHINE ESTATE, LA | Crater of QUALIBOU | West Indies | |
| DA'URE | Fissure vent of DABBAHU | Africa (northeastern) & Red Sea | |
| DAVAO VOLCANO | Synonym of APO | Mindanao | |
| DAVAPIA ROCKS | Cone of RABAUL | New Britain | |
| DAVEY PEAK | Cone of TONEY MOUNTAIN | Antarctica & South Sandwich Islands | |
| DAVIDOF | Stratovolcano | Holocene? | Aleutian Islands |
| DAVIS LAKE | Volcanic field | Radiocarbon | USA (Oregon) |
| DAVIS MOUNTAIN | Shield volcano of DAVIS LAKE | USA (Oregon) | |
| DAWON, BOEKIT | Synonym of DAUN, BUKIT | Sumatra | |
| DAWSON STRAIT GROUP | Volcanic field | Hydration Rind | New Guinea & D'Entrecasteaux Islands |
| DAYANZHIFENG | Cone of CHANGBAISHAN | China (eastern) | |
| DAYINGSHAN | Stratovolcano of TENGCHONG | Southeast Asia | |
| DAYISHAN | Cone of LONGGANG GROUP | China (eastern) | |
| DEACON PEAK | Cone of PENGUIN ISLAND | Antarctica & South Sandwich Islands | |
| DEAD MAN'S HILL | Dome of ST. CATHERINE | West Indies | |
| DEADEA [DEIDEI] | Thermal Feature of DAWSON STRAIT GROUP | New Guinea & D'Entrecasteaux Islands | |
| DEADMAN CREEK | Dome of INYO CRATERS | USA (California) | |
| DEBADO GERA HAYK | Maar of LIADO HAYK | Africa (northeastern) & Red Sea | |
| DEBAWALA | Thermal Feature of IAMALELE | New Guinea & D'Entrecasteaux Islands | |
| DEBAWALA | Thermal Feature of IAMALELE | New Guinea & D'Entrecasteaux Islands | |
| DEBRE ZEIT | Synonym of BISHOFTU VOLCANIC FIELD | Africa (northeastern) & Red Sea | |
| DEBUNSCHA | Cone of CAMEROON | Africa (western) | |
| DECEPTION ISLAND | Caldera | Historical | Antarctica & South Sandwich Islands |
| DEDICA (DEDICAS) | Synonym of DIDICAS | North of Luzon | |
| DEEP CRATER | Crater of MEDICINE LAKE | USA (California) | |
| DEEP CRATER | Crater of SANTA CRUZ | Galápagos Islands | |
| DEER HILL | Dome of REPOROA | New Zealand | |
| DEER MOUNTAIN | Dome of LONG VALLEY | USA (California) | |
| DEER MOUNTAIN [CERRO HUECO] | Shield volcano of ZUNI-BANDERA | USA (New Mexico) | |
| DEFORMES | Thermal Feature of GALERAS | Colombia | |
| DEIDEI | Thermal Feature of DAWSON STRAIT GROUP | New Guinea & D'Entrecasteaux Islands | |
| DELAIRE, VOLCAN | Cone of CHICHINAUTZIN | México | |
| DELAKI, GUNUNG | Synonym of SIRUNG | Lesser Sunda Islands | |
| DELICIAS, CERRO LAS | Dome of ILOPANGO | El Salvador & Honduras | |
| DELICIAS, CERRO LAS | Dome of APASTEPEQUE FIELD | El Salvador & Honduras | |
| DELIRIO, EL | Cone of MADERAS | Nicaragua | |
| DEMA ALI | Synonym of DAMA ALI | Africa (northeastern) & Red Sea | |
| DEMAVEND (DEMAWEND) | Synonym of DAMAVAND | Iran & Afghanistan | |
| DEMOCRATICO | Stratovolcano of CHILLAN, NEVADOS DE | Central Chile & Argentina | |
| DEMON | Stratovolcano | Holocene | Kuril Islands |
| DEMPO | Stratovolcano | Historical | Sumatra |
| DENHAM BAY | Caldera of RAOUL ISLAND | Kermadec Islands | |
| DENISON | Stratovolcano | Holocene? | Alaska Peninsula |
| DENT BICORNE | Cone of KERGUELEN ISLANDS | Indian Ocean (southern) | |
| DENT BLANCHES | Cone of KERGUELEN ISLANDS | Indian Ocean (southern) | |
| DEPRESION DE SAN LORENZO | Maar of CHINGO | Guatemala | |
| DERBI-TAIGA [DERBI-TAYGA] | Shield volcano of AZAS PLATEAU | Russia (southeastern) | |
| DERBI-TAYGA | Shield volcano of AZAS PLATEAU | Russia (southeastern) | |
| DERIBA | Caldera of MARRA, JEBEL | Africa (northern) | |
| DERRUMBADAS, LAS | Dome of SERDAN-ORIENTAL | México | |
| DES VOEUX PEAK | Cone of TAVEUNI | Fiji Islands | |
| DESCABEZADO CHICO | Cone of CALABOZOS | Central Chile & Argentina | |
| DESCABEZADO DEL MAULE | Synonym of DESCABEZADO GRANDE | Central Chile & Argentina | |
| DESCABEZADO GRANDE | Stratovolcanoes | Historical | Central Chile & Argentina |
| DESCONOCIDO-TECOMALES | Synonym of GLORIA, LA | México | |
| DESEJADO, PICO | Dome of TRINDADE | Atlantic Ocean (central) | |
| DESERET | Vent of BLACK ROCK DESERT | USA (Utah) | |
| DESERT CONE | Cone of CRATER LAKE | USA (Oregon) | |
| DESLACS ISLAND | Synonym of GAROVE | New Britain | |
| DESMONTE, VOLCAN | Dome of MASCOTA VOLCANIC FIELD | México | |
| DESOLATION LAVA FIELD | Vent of EDZIZA | Canada | |
| DESOLATION, VALLEY OF | Thermal Feature of WATT, MORNE | West Indies | |
| DESTINEE, MORNE | Dome of DIABLES, MORNE AUX | West Indies | |
| DEUXIEME FORMICA LEO | Crater of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| DEVASTATION | Vent of MEAGER | Canada | |
| DEVASTATION VOLCANO [POGROMNI] | Stratovolcano of WESTDAHL | Aleutian Islands | |
| DEVASTATOR, THE | Cone of MEAGER | Canada | |
| DEVIL ROCK [NGWALA ROCK] | Tuff cone of AOBA | Vanuatu | |
| DEVILS CAULDRON | Cone of CRATERS OF THE MOON | USA (Idaho) | |
| DEVILS GARDEN | Volcanic field | Holocene? | USA (Oregon) |
| DEVILS HILL | Dome of SOUTH SISTER | USA (Oregon) | |
| DEVILS KITCHEN | Thermal Feature of LASSEN VOLCANIC CENTER | USA (California) | |
| DEVIL'S NEEDLE | Vent of LENGAI, OL DOINYO | Africa (eastern) | |
| DEVILS THROAT | Pit crater of KILAUEA | Hawaiian Islands | |
| DEWA-FUJI | Synonym of CHOKAI | Honshu | |
| DHAMAR, HARRAS OF | Volcanic field | Historical | Arabia |
| DHEMENEGHAKI | Pumice cone of MILOS | Greece | |
| DHIN, JABAL | Crater of ARHAB, HARRA OF | Arabia | |
| DHU RAKHAM, JABAL | Cone of DHAMAR, HARRAS OF | Arabia | |
| DI BARUH, DANAU | Crater of TALANG | Sumatra | |
| DIABLE, CERRO DEL | Cinder cone of PALEI-AIKE VOLCANIC FIELD | Southern Chile & Argentina | |
| DIABLES, MORNE AUX | Stratovolcano | Holocene | West Indies |
| DIABLOTINS, MORNE | Stratovolcano | Holocene? | West Indies |
| DIAMANTE | Pleistocene caldera of MAIPO | Central Chile & Argentina | |
| DIAMOND CRATERS | Volcanic field | Holocene? | USA (Oregon) |
| DIAMOND ROCK | Dome of KICK 'EM JENNY | West Indies | |
| DIAU [MT. OIAU] | Stratovolcano of DAWSON STRAIT GROUP | New Guinea & D'Entrecasteaux Islands | |
| DIBA' AL HURUS, JIBAL | Dome of RAHAT, HARRAT | Arabia | |
| DIDICA (DIDICAS) | Synonym of DIDICAS | North of Luzon | |
| DIDICAS | Compound volcano | Historical | North of Luzon |
| DIDIKAS ROCKS | Synonym of DIDICAS | North of Luzon | |
| DIDIMTU | Cone of MEGA BASALT FIELD | Africa (northeastern) & Red Sea | |
| DIEGO DE LA HAYA | Crater of IRAZU | Costa Rica | |
| DIEGO DE LA HAYA FERNANDEZ [DIEGO DE LA HAYA] | Crater of IRAZU | Costa Rica | |
| DIEGO HERNANDEZ | Pleistocene caldera of TENERIFE | Canary Islands | |
| DIENG VOLCANIC COMPLEX | Complex volcano | Historical | Java |
| DIETRO ISOLA, CUDDIOLI DI | Shield volcano of PANTELLERIA | Italy | |
| DIFESO, MONTE | Cinder cone of ETNA | Italy | |
| DIGUILLIN | Pleistocene caldera of CHILLAN, NEVADOS DE | Central Chile & Argentina | |
| DIKIY GREBEN | Synonym of DIKY GREBEN | Kamchatka Peninsula | |
| DIKKARTIN DAG | Dome of ERCIYES DAGI | Turkey | |
| DIKKARTINI | Dome of ERCIYES DAGI | Turkey | |
| DIKY GREBEN | Lava domes | Radiocarbon | Kamchatka Peninsula |
| DIKY KHREBET [DIKYE GREBEN] | Synonym of DIKY GREBEN | Kamchatka Peninsula | |
| DILEKENE | Crater of DUKONO | Halmahera | |
| DILLER CONE [MAKLAKS CRATER] | Cinder cone of CRATER LAKE | USA (Oregon) | |
| DIMA | Lava cone of KRASHENINNIKOV | Kamchatka Peninsula | |
| DIMMADALSHAEDH | Shield volcano of HENGILL | Iceland (southwestern) | |
| DINERO | Cinder cone of PALEI-AIKE VOLCANIC FIELD | Southern Chile & Argentina | |
| DIODIO | Maar of GOODENOUGH | New Guinea & D'Entrecasteaux Islands | |
| DIOGENEAS, MT. [HANGING ROCK] | Dome of NEWER VOLCANICS PROV | Australia | |
| DIONISIO | Stratovolcano of BABUYAN CLARO | North of Luzon | |
| DISAPPOINTMENT CLEAVER | Thermal Feature of RAINIER | USA (Washington) | |
| DISAPPOINTMENT PEAK | Dome of GLACIER PEAK | USA (Washington) | |
| DISHPAN GAP | Cinder cone of GLACIER PEAK | USA (Washington) | |
| DITMAR | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| DIVES, MONT DE LA | Stratovolcano of AMSTERDAM ISLAND | Indian Ocean (southern) | |
| DIXON, MT. | Stratovolcano of HEARD | Indian Ocean (southern) | |
| DJABI | Synonym of CORBETTI CALDERA | Africa (northeastern) & Red Sea | |
| DJAILOLO | Synonym of JAILOLO | Halmahera | |
| DJAMBANGAN [JAMBANGAN] | Crater of IYANG-ARGAPURA | Java | |
| DJAPATI [JAPATI] | Crater of GUNTUR | Java | |
| DJAR'A, DJEBEL | Synonym of YAR, JABAL | Arabia | |
| DJAR'ATAIN, HARRA OF [JAR'ATAIN] | Cone of YAR, JABAL | Arabia | |
| DJARIAN, KAWAH [KAWAH JARIAN] | Crater of TANGKUBANPARAHU | Java | |
| DJARRA | Synonym of YAR, JABAL | Arabia | |
| DJAWALO [JAWALO] | Crater of PALUWEH | Lesser Sunda Islands | |
| DJEBEL | See proper name (e.g. DHIN, DJEBEL) | French spelling of Arabaic word for MT. | |
| DJEMBANGAN [JAMBANGAN] | Caldera of SEMERU | Java | |
| DJEMBANGAN [JAMBANGAN] | Caldera of SEMERU | Java | |
| DJERBAN | Crater of ARHAB, HARRA OF | Arabia | |
| DJERO [JERO] | Crater of ARJUNO-WELIRANG | Java | |
| DJINGGO, KAPUNDAN [KEPUNDAN JINGGO] | Crater of MARAPI | Sumatra | |
| DJIRING PLATEAU | Synonym of HAUT DONG NAI | Southeast Asia | |
| DJONGGRING SELOKO [JONGGRING SELOKO] | Crater of SEMERU | Java | |
| DJOUGOUDJA DSAHA | Crater of KARTHALA | Indian Ocean (western) | |
| DJUNGO, LE | Cone of TOMBEL GRABEN | Africa (western) | |
| DJURIG, KAWAH [KAWAH JURIG] | Crater of TANGKUBANPARAHU | Java | |
| DOBU | Stratovolcano of DAWSON STRAIT GROUP | New Guinea & D'Entrecasteaux Islands | |
| DODOEKKO | Synonym of DUKONO | Halmahera | |
| DOE PEAK | Cone of MEDICINE LAKE | USA (California) | |
| DOEANG | Synonym of RUANG | Sangihe Islands | |
| DOEKONO | Synonym of DUKONO | Halmahera | |
| DOEWANG | Synonym of RUANG | Sangihe Islands | |
| DOFAN (DOFANE, DOFANI) | Synonym of DOFEN | Africa (northeastern) & Red Sea | |
| DOFEN | Stratovolcano | Holocene | Africa (northeastern) & Red Sea |
| DOGANA, LA | Cone of VULSINI | Italy | |
| DOGS HEAD | Dome of ST. HELENS | USA (Washington) | |
| DOHMBERG | Cone of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| DOINYO | See proper name (e.g. BURU, DOINYO) | Masai for MT. | |
| DOLINNIY | Cinder cone of UDOKAN PLATEAU | Russia (southeastern) | |
| DOLOK | See proper name (e.g. SINGGALANG, DOLOK) | Indonesian for MOUNTAIN | |
| DOLOMIEU | Crater of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| DOM JOAO DE CASTRO BANK | Synonym of DON JOAO DE CASTRO BANK | Azores | |
| DOMA ALE | Synonym of DAMA ALI | Africa (northeastern) & Red Sea | |
| DOMA CARVA | Pleistocene caldera of KERGUELEN ISLANDS | Indian Ocean (southern) | |
| DOMA PEAKS | Stratovolcano | Holocene? | New Guinea & D'Entrecasteaux Islands |
| DOMADALSHRAUN | Fissure vent of TORFAJOKULL | Iceland (southern) | |
| DOMAIN | Tuff ring of AUCKLAND FIELD | New Zealand | |
| DOMAS, KAWAH | Crater of TANGKUBANPARAHU | Java | |
| DOMASHNII | Cinder cone of KOSTAKAN | Kamchatka Peninsula | |
| DOMBROVSKIY | Cone of VITIM PLATEAU | Russia (southeastern) | |
| DOME, PUY DE | Dome of CHAINE DES PUYS | Western Europe | |
| DOME, THE | Dome of TARANAKI [EGMONT] | New Zealand | |
| DOME, THE | Cinder cone of NEWBERRY | USA (Oregon) | |
| DOMESHNYAYA | Dome of KSUDACH | Kamchatka Peninsula | |
| DOMINGO SPRING | Thermal Feature of LASSEN VOLCANIC CENTER | USA (California) | |
| DOMO DEL AZUFRE | Dome of PUYEHUE-CORDON CAULLE | Central Chile & Argentina | |
| DOMUYO | Stratovolcano | Holocene? | Central Chile & Argentina |
| DON CASIMIRO, VOLCAN | Cinder cone of MAIPO | Central Chile & Argentina | |
| DON CHANA, CERRO | Cinder cone of CUILAPA-BARBARENA | Guatemala | |
| DON CHUCO | Stratovolcano of TINGUIRIRICA | Central Chile & Argentina | |
| DON GREGORI0 [CERRO DON CHANA] | Cinder cone of CUILAPA-BARBARENA | Guatemala | |
| DON JOAO DE CASTRO BANK | Submarine volcano | Historical | Azores |
| DONA JUANA | Stratovolcano | Historical | Colombia |
| DONALD | Cone of SEAL NUNATAKS GROUP | Antarctica & South Sandwich Islands | |
| DONALD DUCK | Crater of WHITE ISLAND | New Zealand | |
| DONG SHAN | Cinder cone of KUNLUN VOLCANIC GROUP | China (western) | |
| DONGDAPOTOU | Cone of TENGCHONG | Southeast Asia | |
| DONGHENGDAOSHAN | Cone of LONGGANG GROUP | China (eastern) | |
| DONGHUOKOU | Cinder cone of KUNLUN VOLCANIC GROUP | China (western) | |
| DONGJIAODEBUSHAN | Cone of WUDALIANCHI | China (eastern) | |
| DONGLONGMENSHAN | Cone of WUDALIANCHI | China (eastern) | |
| DONGLONGWAN | Maar of LONGGANG GROUP | China (eastern) | |
| DONGO, MORNE | Dome of SOUFRIERE GUADELOUPE | West Indies | |
| DONKORO-YAMA | Cone of USU | Hokkaido | |
| DONNOYE | Thermal Feature of MUTNOVSKY | Kamchatka Peninsula | |
| DONYO | See proper name (e.g. NGAI, DONYO) | Masai for MT. | |
| DOON [TROU AU NATRON] | Pleistocene caldera of TOUSSIDE, TARSO | Africa (northern) | |
| DOON KIDIMI | Crater of TOUSSIDE, TARSO | Africa (northern) | |
| DOON KINIMI [DOON KIDIMI] | Crater of TOUSSIDE, TARSO | Africa (northern) | |
| DOON OREI [TROU AU NATRON] | Pleistocene caldera of TOUSSIDE, TARSO | Africa (northern) | |
| DORO AFI TOI | Dome of TAMBORA | Lesser Sunda Islands | |
| DORO API | Cone of SANGEANG API | Lesser Sunda Islands | |
| DORO MANTAI | Cone of SANGEANG API | Lesser Sunda Islands | |
| DORO MANTOI [DORO MANTAI] | Cone of SANGEANG API | Lesser Sunda Islands | |
| DORR FUMAROLE FIELD | Thermal Feature of BAKER | USA (Washington) | |
| DOS CERROS | Shield volcano of CHICHINAUTZIN | México | |
| DOS COYOTES | Dome of PRIMAVERA, SIERRA LA | México | |
| DOS EQUIS | Dome of CEBORUCO | México | |
| DOS NOVILLOS, VOLCAN | Stratovolcano of TURRIALBA | Costa Rica | |
| DOS TRINTA, CABECO | Cone of FAYAL | Azores | |
| DOTSERO | Maar | Radiocarbon | USA (Colorado) |
| DOUBLE CRATER | Stratovolcano of EMMONS LAKE | Alaska Peninsula | |
| DOUBLE HOLE CRATER | Crater of MEDICINE LAKE | USA (California) | |
| DOUGLAS | Stratovolcano | Holocene | Alaska Peninsula |
| DOUKKHAN, DJEBEL [JEBEL DUCHAN] | Cone of TAIR, JEBEL AT | Africa (northeastern) & Red Sea | |
| DOUSSAINTS | Cone of IRAZU | Costa Rica | |
| DOWI [MT. REAUMUR] | Stratovolcano of LONG ISLAND | Northeast of New Guinea | |
| DOWNS CONE | Cone of TONEY MOUNTAIN | Antarctica & South Sandwich Islands | |
| DOYO SEAMOUNT | Submarine volcano | Fumarolic | Izu, Volcano, & Mariana Islands |
| DR. FERREIRA, PICO | Cone of PICOS VOLCANIC SYSTEM | Azores | |
| DRAGON | Cone of WELLS GRAY-CLEARWATER | Canada | |
| DRAKESBAD | Thermal Feature of LASSEN VOLCANIC CENTER | USA (California) | |
| DRAKON | Dome of GROZNY GROUP | Kuril Islands | |
| DRANGAGRUNDIR | Fissure vent of KRAFLA | Iceland (northeastern) | |
| DREISER WEIHER | Maar of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| DREKAGIGAROD | Fissure vent of BARDARBUNGA | Iceland (northeastern) | |
| DRINGO | Crater of DIENG VOLCANIC COMPLEX | Java | |
| DROUZ, DJEBEL ED | Synonym of DRUZE, JABAL AD | Syria | |
| DRUSE, JABAL | Cone of ES SAFA | Syria | |
| DRUZ, JABAL AL | Synonym of DRUZE, JABAL AD | Syria | |
| DRUZE, JABAL AD | Volcanic field | Holocene | Syria |
| DRY BUTTE | Cinder cone of BACHELOR | USA (Oregon) | |
| DRY CRATER | Crater of CENTRAL ISLAND | Africa (eastern) | |
| DRY CREEK DOME | Dome of LONG VALLEY | USA (California) | |
| DRY MAAR | Maar of DIAMOND CRATERS | USA (Oregon) | |
| DRYDEN'S ROCK [HANGING ROCK] | Dome of NEWER VOLCANICS PROV | Australia | |
| DRYGALSKI, MT. | Cone of HEARD | Indian Ocean (southern) | |
| DUA SAUDARA | Stratovolcano of TONGKOKO | Sulawesi | |
| DUA SAUDARA | Cone of AMASING | Halmahera | |
| DUANG | Synonym of RUANG | Sangihe Islands | |
| DUANI | Cone of CHYULU HILLS | Africa (eastern) | |
| DUANZISHAN [TUANZISHAN] | Cinder cone of KELUO GROUP | China (eastern) | |
| DUBBEH, DJEBEL | Synonym of DUBBI | Africa (northeastern) & Red Sea | |
| DUBBEY, GEBEL | Synonym of DUBBI | Africa (northeastern) & Red Sea | |
| DUBBI | Stratovolcano | Historical | Africa (northeastern) & Red Sea |
| DUCHAN, JEBEL | Cone of TAIR, JEBEL AT | Africa (northeastern) & Red Sea | |
| DUCK LAKE | Crater of YELLOWSTONE | USA (Wyoming) | |
| DUCROT | Crater of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| DUDERS HILL | Cone of AUCKLAND FIELD | New Zealand | |
| DUENJO | See proper name (e.g. NGAI, DUENJO) | Masai for MT. | |
| DUFFERINBREEN | Cone of JAN MAYEN | Atlantic Ocean (Jan Mayen) | |
| DUFFRIN ISLAND | Cone of MILBANKE SOUND GROUP | Canada | |
| DUGA | Cinder cone of KRASHENINNIKOV | Kamchatka Peninsula | |
| DUJIANSHAN | Cinder cone of KUNLUN VOLCANIC GROUP | China (western) | |
| DUKANA VOLC FIELD | Synonym of MEGA BASALT FIELD | Africa (northeastern) & Red Sea | |
| DUKO MA TALA | Synonym of DUKONO | Halmahera | |
| DUKONO | Complex volcano | Historical | Halmahera |
| DUMAS | Cone of AMSTERDAM ISLAND | Indian Ocean (southern) | |
| DUMILAH | Crater of LAWU | Java | |
| DUNCAN CANAL | Volcanic field | Holocene | Alaska (eastern) |
| DUNDOLI | Cone of NGOZI | Africa (eastern) | |
| DUPORTAIL | Synonym of LOLOBAU | New Britain | |
| DUPPACHER WEIHER | Maar of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| DURANDAL | Cinder cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| DURANGO VOLCANIC FIELD | Cinder cones | Holocene | México |
| DURAZ, JEBEL | Synonym of DRUZE, JABAL AD | Syria | |
| DURAZNERO [SAN JUAN] | Fissure vent of LA PALMA | Canary Islands | |
| DURAZNILLO, CERRO | Stratovolcano of SANTA ANA | El Salvador & Honduras | |
| DURRES | Maar of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| DURUZ, JABAL ED | Synonym of DRUZE, JABAL AD | Syria | |
| DUSY | Cone of DARIGANGA VOLCANIC FIELD | Mongolia | |
| DUTTON | Stratovolcano | Holocene | Alaska Peninsula |
| DUTTON CLIFF | Stratovolcano of CRATER LAKE | USA (Oregon) | |
| DUWANG | Synonym of RUANG | Sangihe Islands | |
| DVEGGAR | Crater Row of TUNGNAFELLSJOKULL | Iceland (northeastern) | |
| DVERGAHRAUN | Crater Row of BARDARBUNGA | Iceland (northeastern) | |
| DVOINOI | Dome of UDOKAN PLATEAU | Russia (southeastern) | |
| DVOINOY | Cinder cone of TOLBACHIK | Kamchatka Peninsula | |
| DVOR | Stratovolcano of KARYMSKY | Kamchatka Peninsula | |
| DVUKHGLAVY | Dome of BEZYMIANNY | Kamchatka Peninsula | |
| DYNGJUFJALLAHRAUN | Crater Row of ASKJA | Iceland (northeastern) | |
| DYNGJUFJOLL | Crater Row of ASKJA | Iceland (northeastern) | |
| DYNGJUHALS | Fissure vent of BARDARBUNGA | Iceland (northeastern) | |
| DYNGNAHRAUN | Crater Row of KRISUVIK | Iceland (southwestern) | |
| DYNJUFJOLL (DYNGJUFJALL) | Synonym of ASKJA | Iceland (northeastern) | |
| DZAN TOLOGAI | Cone of TARYATU-CHULUTU | Mongolia | |
| DZENZURSKAIA, SOPKA | Synonym of DZENZURSKY | Kamchatka Peninsula | |
| DZENZURSKY | Compound volcano | Holocene | Kamchatka Peninsula |
| DZHANGA-TAPA | Cone of ARAGATS | Caucasus, Georgia & Armenia | |
| DZIGOKU [TREZUBETZ] | Somma volcano of KOLOKOL GROUP | Kuril Islands | |
| DZUN-NERETTE | Cone of DARIGANGA VOLCANIC FIELD | Mongolia | |
| E-SAN | Stratovolcano | Historical | Hokkaido |
| EAGLE LAKE FIELD | Fissure vents | Holocene? | USA (California) |
| EAGLE PEAK | Dome of LASSEN VOLCANIC CENTER | USA (California) | |
| EANASTICK MEADOW | Vent of GARIBALDI | Canada | |
| EARTHQUAKE DOME | Dome of MAMMOTH MOUNTAIN | USA (California) | |
| EAST CABRIT | Dome of DIABLES, MORNE AUX | West Indies | |
| EAST CAPE VOLCANO | Stratovolcano of BULDIR | Aleutian Islands | |
| EAST CRATER | Crater of WHITE ISLAND | New Zealand | |
| EAST CRATER | Crater of RUAPEHU | New Zealand | |
| EAST CRATER | Crater of WRANGELL | Alaska (eastern) | |
| EAST CRATER | Crater of RAINIER | USA (Washington) | |
| EAST CRATER | Shield volcano of INDIAN HEAVEN | USA (Washington) | |
| EAST DIAMANTE | Submarine volcano | Fumarolic | Izu, Volcano, & Mariana Islands |
| EAST DOME | Dome of WHALE ISLAND | New Zealand | |
| EAST DOME | Dome of ST. HELENS | USA (Washington) | |
| EAST EPI | Caldera of EPI | Vanuatu | |
| EAST ISLAND | Synonym of EST, ILE DE L' | Indian Ocean (southern) | |
| EAST LAKE FISSURE | Fissure vent of NEWBERRY | USA (Oregon) | |
| EAST LAVA FIELD | Synonym of SQUAW RIDGE LAVA FIELD | USA (Oregon) | |
| EAST MAAR | Maar of UKINREK MAARS | Alaska Peninsula | |
| EAST MAUI VOLCANO | Synonym of HALEAKALA | Hawaiian Islands | |
| EAST RIFT ZONE | Fissure vent of KILAUEA | Hawaiian Islands | |
| EAST SAND BUTTE | Cone of MEDICINE LAKE | USA (California) | |
| EAST SAYAN VOLC FIELD | Synonym of OKA PLATEAU | Russia (southeastern) | |
| EAST SIKHOTE-ALIN | Synonym of SIKHOTE-ALIN | Russia (southeastern) | |
| EAST TANAKA | Stratovolcano of TANAGA | Aleutian Islands | |
| EAST TUVA PLATEAU | Synonym of AZAS PLATEAU | Russia (southeastern) | |
| EAST TWIN CRATER | Maar of DIAMOND CRATERS | USA (Oregon) | |
| EAST ZEWAY | Synonym of EAST ZWAY | Africa (northeastern) & Red Sea | |
| EAST ZIWAY | Synonym of EAST ZWAY | Africa (northeastern) & Red Sea | |
| EAST ZWAI | Synonym of EAST ZWAY | Africa (northeastern) & Red Sea | |
| EAST ZWAY | Fissure vents | Holocene | Africa (northeastern) & Red Sea |
| EAST-MATTHEW | Cone of MATTHEW ISLAND | Pacific Ocean (southwestern) | |
| EASTER ISLAND | Shield volcanoes | Holocene | Pacific Ocean (Chilean Islands) |
| EASTERN DOME | Dome of OKATAINA | New Zealand | |
| EASTERN GEMINI SEAMOUNT | Submarine volcano | Historical | Pacific Ocean (southwestern) |
| EASTERN HILL | Cone of NEWER VOLCANICS PROV | Australia | |
| EASTERN MOUND | Stratovolcano of FISHER | Aleutian Islands | |
| EBEKO | Somma volcano | Historical | Kuril Islands |
| EBINO-DAKE | Stratovolcano of KIRISHIMA | Ryukyu Islands & Kyushu | |
| EBO LOBO (EBOELOBA) | Synonym of EBULOBO | Lesser Sunda Islands | |
| EBOGA | Pleistocene caldera of MANENGOUBA | Africa (western) | |
| EBOSHI-DAKE | Cone of KIRISHIMA | Ryukyu Islands & Kyushu | |
| EBOSHI-DAKE | Stratovolcano of ASO | Ryukyu Islands & Kyushu | |
| EBOSHI-DAKE | Cone of NORIKURA | Honshu | |
| EBOSHI-DAKE | Stratovolcano of DAISETSU | Hokkaido | |
| EBOSI-DAKE [EBOSHI-DAKE] | Cone of KIRISHIMA | Ryukyu Islands & Kyushu | |
| EBOSI-DAKE [EBOSHI-DAKE] | Stratovolcano of DAISETSU | Hokkaido | |
| EBU LOBO | Synonym of EBULOBO | Lesser Sunda Islands | |
| EBULOBO | Stratovolcano | Historical | Lesser Sunda Islands |
| EBURRU | Synonym of EBURRU, OL DOINYO | Africa (eastern) | |
| EBURRU, OL DOINYO | Complex volcano | Holocene | Africa (eastern) |
| ECATZINGO CONES | Cinder cone of POPOCATEPETL | México | |
| ECCLES, MT. | Cone of NEWER VOLCANICS PROV | Australia | |
| ECHO CRATER BUTTE | Cinder cone of CRATERS OF THE MOON | USA (Idaho) | |
| ECKERSLEY, MT. | Cone of NEWER VOLCANICS PROV | Australia | |
| ECOMA, KAWAH | Crater of TANGKUBANPARAHU | Java | |
| ECUADOR | Shield volcano | Surface Exposure | Galápagos Islands |
| EDD LAVA FIELD | Volcanic field of DUBBI | Africa (northeastern) & Red Sea | |
| EDD, VOLCANO OF | Synonym of DUBBI | Africa (northeastern) & Red Sea | |
| EDDYSTONE ISLAND | Synonym of SIMBO | Bougainville & Solomon Islands | |
| EDEN, MT. | Cone of AUCKLAND FIELD | New Zealand | |
| EDGECUMBE | Stratovolcanoes | Radiocarbon | Alaska (eastern) |
| EDGECUMBE, MT. | Dome of OKATAINA | New Zealand | |
| EDZIZA | Stratovolcano | Radiocarbon | Canada |
| EEK | Synonym of VENIAMINOF | Alaska Peninsula | |
| EGAN | Cinder cone of BACHELOR | USA (Oregon) | |
| EGGELLA | Shield volcano | Holocene? | Kamchatka Peninsula |
| EGGOYA | Tuff cone of JAN MAYEN | Atlantic Ocean (Jan Mayen) | |
| EGMONT | Synonym of TARANAKI [EGMONT] | New Zealand | |
| EGON | Stratovolcano | Historical | Lesser Sunda Islands |
| EGUAS | Cone of SETE CIDADES | Azores | |
| EHI | See proper name (e.g. SOSSO, EHI) | Chad term for MOUNTAIN | |
| EICKELBERG PEAK | Stratovolcano of FISHER | Aleutian Islands | |
| EIFEL VOLC FIELD | Synonym of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| EIGO-ZAN | Synonym of FUJI | Honshu | |
| EILER BUTTE | Cinder cone of TUMBLE BUTTES | USA (California) | |
| EIMNAKH | Cinder cone of UDOKAN PLATEAU | Russia (southeastern) | |
| EININDRANGUR | Submarine vent of VESTMANNAEYJAR | Iceland (southern) | |
| EKARMA | Stratovolcano | Historical | Kuril Islands |
| EKARUMA | Synonym of EKARMA | Kuril Islands | |
| EKSTRUSIVNY GREBEN | Dome of BEZYMIANNY | Kamchatka Peninsula | |
| EKUNDO | Cone of CAMEROON | Africa (western) | |
| EL | See proper name (e.g. NUEVO, EL) | Spanish for THE | |
| ELAHO VALLEY | Vent of MEAGER | Canada | |
| ELBRUS | Stratovolcano | Tephrochronology | Caucasus, Georgia & Armenia |
| ELDBORG | Cone of LJOSUFJOLL | Iceland (western) | |
| ELDBORG A BRENNISTEINSFJOLLUM | Crater Row of BRENNISTEINSFJOLL | Iceland (southwestern) | |
| ELDBORG NYRDRI AT LAMBAFELL | Crater Row of BRENNISTEINSFJOLL | Iceland (southwestern) | |
| ELDBORG SYDRI AT LAMBAFELL | Crater Row of BRENNISTEINSFJOLL | Iceland (southwestern) | |
| ELDBORG UNDIR MEITLUM | Crater Row of HENGILL | Iceland (southwestern) | |
| ELDBORG-DROTTNINGU | Crater Row of BRENNISTEINSFJOLL | Iceland (southwestern) | |
| ELDBORG-THINGVALLAVATN | Crater Row of HENGILL | Iceland (southwestern) | |
| ELDBORG-TROLLADYNGJA | Crater Row of KRISUVIK | Iceland (southwestern) | |
| ELDBORGIR | Crater Row of HENGILL | Iceland (southwestern) | |
| ELDBORGIR-TINDASKAGA | Crater Row of HENGILL | Iceland (southwestern) | |
| ELDEYJAR | Submarine vent of REYKJANESHRYGGUR | Iceland (southwestern) | |
| ELDEYJARBODI | Submarine vent of REYKJANESHRYGGUR | Iceland (southwestern) | |
| ELDFELL | Fissure vent of VESTMANNAEYJAR | Iceland (southern) | |
| ELDGIGUR | Fissure vent of GRIMSVOTN | Iceland (northeastern) | |
| ELDGJA | Fissure vent of KATLA | Iceland (southern) | |
| ELDIVIDARHRAUN | Fissure vent of HEKLA | Iceland (southern) | |
| ELDOERNE [ELDEYJAR] | Submarine vent of REYKJANESHRYGGUR | Iceland (southwestern) | |
| ELDVORP | Crater Row of REYKJANES | Iceland (southwestern) | |
| ELECTRA, MT. | Synonym of PLEIADES, THE | Antarctica & South Sandwich Islands | |
| ELEGANTE, VOLCAN EL | Maar of PINACATE | México | |
| ELEITOGA | Cone of SAVAI'I | Samoan & Wallis Islands | |
| ELELAU | Synonym of JALUA | Africa (northeastern) & Red Sea | |
| ELENA, CRATER | Crater of PINACATE | México | |
| ELENGOUM | Pleistocene caldera of MANENGOUBA | Africa (western) | |
| ELEPHANT, MT. | Cone of NEWER VOLCANICS PROV | Australia | |
| ELIANE CONE | Submarine vent of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| ELIZA, MT. | Dome of NEWER VOLCANICS PROV | Australia | |
| ELK BUTTE | Dome of YELLOWSTONE | USA (Wyoming) | |
| ELLIDAEY | Cone of VESTMANNAEYJAR | Iceland (southern) | |
| ELLIOTT'S CRATER | Crater of YELLOWSTONE | USA (Wyoming) | |
| ELLIS CONE | Cone of TONEY MOUNTAIN | Antarctica & South Sandwich Islands | |
| ELLITTICO | Pleistocene caldera of ETNA | Italy | |
| ELMAU | Cone of CHYULU HILLS | Africa (eastern) | |
| ELMENTEITA BADLANDS | Pyroclastic cones | Holocene | Africa (eastern) |
| ELOI, MORNE | Dome of PLAT PAYS, MORNE | West Indies | |
| ELOVSKY | Shield volcanoes | Tephrochronology | Kamchatka Peninsula |
| ELWYN HOT SPRINGS | Thermal Feature of EDZIZA | Canada | |
| EMAO [LOBOA] | Stratovolcano of NORTH VATE | Vanuatu | |
| EMBAJADA, CERRO DE LA | Cinder cone of NEJAPA-MIRAFLORES | Nicaragua | |
| EMBOCADERO, VOLCAN | Cinder cone of MASCOTA VOLCANIC FIELD | México | |
| EMBORIO | Thermal Feature of NISYROS | Greece | |
| EMI | See proper name (e.g. KOUSSI, EMI) | Chad term for MOUNTAIN | |
| EMMA, MT. | Cinder cone of UINKARET FIELD | USA (Arizona) | |
| EMMONS LAKE | Caldera | Holocene | Alaska Peninsula |
| EMMONS, MOUNT | Stratovolcano of EMMONS LAKE | Alaska Peninsula | |
| EMPEROR OF CHINA | Submarine volcano ? | Uncertain | Banda Sea |
| EMPOENG | Synonym of LOKON-EMPUNG | Sulawesi | |
| EMPONG [EMPUNG] | Crater of LOKON-EMPUNG | Sulawesi | |
| EMPUNG | Crater of LOKON-EMPUNG | Sulawesi | |
| EMSTRUHRUAN | Fissure vent of KATLA | Iceland (southern) | |
| EMURUANGOGOLAK | Shield volcano | Radiocarbon | Africa (eastern) |
| EMURUEPOLI | Cone of EMURUANGOGOLAK | Africa (eastern) | |
| ENAMBABA | Cone of EMURUANGOGOLAK | Africa (eastern) | |
| 'ENAZ, HALA-'L- | Cone of 'UWAYRID, HARRAT | Arabia | |
| ENCANTADA MAYOR, LA | Synonym of SAN LUIS, ISLA | México | |
| ENCANTADA, CALDERA | Cinder cone of FUERTEVENTURA | Canary Islands | |
| ENCANTADA, LAGUNA | Maar of SAN MARTIN | México | |
| ENCIERRO, CERRO | Vent of ZUNI-BANDERA | USA (New Mexico) | |
| ENCLOS VELAIN [VELAIN] | Crater of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| ENDEAVOUR RIDGE | Submarine volcano | Uranium-series | Pacific Ocean (northern) |
| ENDEH API | Synonym of IYA | Lesser Sunda Islands | |
| ENDUT, GUNUNG | Stratovolcano of PERBAKTI-GAGAK | Java | |
| ENFORCADO, PICO DO | Cone of SETE CIDADES | Azores | |
| ENGARE SUKUTA [SUGUTA-LOGKIPI] | Thermal Feature of BARRIER, THE | Africa (eastern) | |
| ENGELORETI, OL DOINYO | Cone of CHYULU HILLS | Africa (eastern) | |
| ENGLISH'S CRATER | Crater of SOUFRIERE HILLS | West Indies | |
| ENGORDA, VOLCAN LA | Stratovolcano of SAN JOSE | Central Chile & Argentina | |
| ENIWA | Stratovolcano of SHIKOTSU | Hokkaido | |
| ENKO-DAKE | Cone of NORIKURA | Honshu | |
| ENKORIKA | Fissure vent of SUSWA | Africa (eastern) | |
| ENOSTUCK MEADOW [EANASTICK MEADOW] | Vent of GARIBALDI | Canada | |
| ENSENADA EL VIEJO | Tuff ring of ZAPATERA | Nicaragua | |
| ENSENADA LOS CHIQUEROS | Lava cone of ZAPATERA | Nicaragua | |
| ENSENADAS DE PUNTA GORDA | Cone of ZAPATERA | Nicaragua | |
| ENTREMONTANAS, MONTANA | Cinder cone of HIERRO | Canary Islands | |
| ENVAL, MAAR D' | Maar of CHAINE DES PUYS | Western Europe | |
| EONOSTUCK MEADOW [EANASTICK MEADOW] | Vent of GARIBALDI | Canada | |
| EPI | Stratovolcanoes | Historical | Vanuatu |
| EPI A | Submarine vent of EPI | Vanuatu | |
| EPI B | Submarine vent of EPI | Vanuatu | |
| EPI C | Submarine vent of EPI | Vanuatu | |
| EPOMEO | Synonym of ISCHIA | Italy | |
| EPSOM AVENUE | Cone of AUCKLAND FIELD | New Zealand | |
| EPUN | Crater of CALLAQUI | Central Chile & Argentina | |
| ER-BAL HAF | Synonym of BAL HAF, HARRA OF | Arabia | |
| ERA KOHOR | Caldera of KOUSSI, EMI | Africa (northern) | |
| ERBENSCHELL | Cone of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| ERCIYAS DAGI | Synonym of ERCIYES DAGI | Turkey | |
| ERCIYES DAGI | Stratovolcano | Holocene? | Turkey |
| ERDJAS (ERDSCHIAS, ERDZHIAS) | Synonym of ERCIYES DAGI | Turkey | |
| EREBUS | Cone of KERGUELEN ISLANDS | Indian Ocean (southern) | |
| EREBUS | Stratovolcano | Historical | Antarctica & South Sandwich Islands |
| ERH-LUNG-WAN [ERLONGWAN] | Maar of LONGGANG GROUP | China (eastern) | |
| ERITA, LA | Cinder cone of COLIMA | México | |
| ERLONGWAN | Maar of LONGGANG GROUP | China (eastern) | |
| ERMAK | Dome of GROZNY GROUP | Kuril Islands | |
| ERPINGDINGSHAN | Stratovolcano of TATUN GROUP | Taiwan | |
| ERRANT CONE | Cinder cone of MASAYA | Nicaragua | |
| ERTA ALE | Shield volcano | Historical | Africa (northeastern) & Red Sea |
| ERTA ALI (ERTAHALE, ERTO ALE) | Synonym of ERTA ALE | Africa (northeastern) & Red Sea | |
| ES SAFA | Volcanic field | Historical | Syria |
| ES-SAWAD, DJEBEL | Synonym of MARHA, JABAL EL- | Arabia | |
| ESA 'ALA | Synonym of DAWSON STRAIT GROUP | New Guinea & D'Entrecasteaux Islands | |
| ESAN | Synonym of E-SAN | Hokkaido | |
| ESCALANTE | Stratovolcano of SAIRECABUR | Northern Chile, Bolivia & Argentina | |
| ESCANABA SEGMENT | Submarine volcano | Uranium-series | Pacific Ocean (northern) |
| ESCANGRAGA, MONTANA DE | Cone of FUERTEVENTURA | Canary Islands | |
| ESCHELLE | Cinder cone of SOUFRIERE GUADELOUPE | West Indies | |
| ESCLAVOS, CERRITO LOS | Cinder cone of CUILAPA-BARBARENA | Guatemala | |
| ESCOBETA, CERRO | Cone of CHICHINAUTZIN | México | |
| ESCONDIDA, CERRO LAGUNA | Cone of CORDON DE PUNTAS NEGRAS | Northern Chile, Bolivia & Argentina | |
| ESCONDIDA, LAGUNA | Synonym of CONDOR, CERRO EL | Northern Chile, Bolivia & Argentina | |
| ESCORIAL, CERRO (ACHIN-NIUELLU) | Cone of HUANQUIHUE GROUP | Central Chile & Argentina | |
| ESCORIAL, CERRO | Stratovolcano | Holocene? | Northern Chile, Bolivia & Argentina |
| ESCORIAS, CRATER DE LAS | Crater of CALABOZOS | Central Chile & Argentina | |
| ESCURO, MONTE | Cone of AGUA DE PAU | Azores | |
| ESH-SHAMIT, DJEBEL | Cone of KHAYBAR, HARRAT | Arabia | |
| ESI, JABAL EL- | Stratovolcano of DHAMAR, HARRAS OF | Arabia | |
| ESJUFJOLL | Stratovolcano | Historical | Iceland (southeastern) |
| ESKI ACIGOL | Maar of ACIGOL-NEVSEHIR | Turkey | |
| ESKIHLIDARFJOLL | Crater Row of VATNAFJOLL | Iceland (southern) | |
| ESKKRATERET | Cone of JAN MAYEN | Atlantic Ocean (Jan Mayen) | |
| ESMERALDA BANK | Submarine volcano | Fumarolic | Izu, Volcano, & Mariana Islands |
| ESPAGNOL, MORNE | Dome of DIABLOTINS, MORNE | West Indies | |
| ESPANA, CERRO | Dome of SANTA ISABEL | Colombia | |
| ESPARRAGO, EL | Cone of TENERIFE | Canary Islands | |
| ESPAZOTE, CERRO EL | Cone of ZITACUARO-VALLE DE BRAVO | México | |
| ESPEJOS, LOMA DE LOS | Dome of MAULE, LAGUNA DEL | Central Chile & Argentina | |
| ESPERANCE, MT. | Cone of GALLEGO | Bougainville & Solomon Islands | |
| ESPINA | Dome of ARENAL | Costa Rica | |
| ESPINASSE, PUY D' | Cone of CHAINE DES PUYS | Western Europe | |
| ESPINO, CERRITO EL | Dome of ILOPANGO | El Salvador & Honduras | |
| ESPIRITU SANTO | Stratovolcano of MIRAVALLES | Costa Rica | |
| ESPIRITU SANTO | Stratovolcano of SAN JOSE | Central Chile & Argentina | |
| ESSA | Cone of JAN MAYEN | Atlantic Ocean (Jan Mayen) | |
| ESSI, DJEBEL AL [JABAL EL-ESI] | Stratovolcano of DHAMAR, HARRAS OF | Arabia | |
| ESSINGEN | Maar of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| ESSINO | Thermal Feature of KOS | Greece | |
| EST, ILE DE L' | Stratovolcano | Holocene? | Indian Ocean (southern) |
| ESTANCIA, CERRO LA | Dome of ZITACUARO-VALLE DE BRAVO | México | |
| ESTANY, VOLCA L' | Cone of OLOT VOLCANIC FIELD | Western Europe | |
| ESTELI | Fissure vents | Holocene? | Nicaragua |
| ESTIVADOUX, MAAR D' | Maar of CHAINE DES PUYS | Western Europe | |
| ESTRADA | Maar of MICHOACAN-GUANAJUATO | México | |
| ESTRECHO, MONTANA DEL | Cinder cone of TENERIFE | Canary Islands | |
| ESTRELLA, CERRO DE LA | Cone of CHICHINAUTZIN | México | |
| ET-TADAWIN | Tuff cone of HAYLAN, JABAL | Arabia | |
| ETHNEIN, HALA-'L- | Synonym of ITHNAYN, HARRAT | Arabia | |
| ETINDE | Stratovolcano of CAMEROON | Africa (western) | |
| ETNA | Stratovolcanoes | Historical | Italy |
| ETNEA | Synonym of ETNA | Italy | |
| ETOILE, PIC DE L' | Synonym of MERE LAVA | Vanuatu | |
| ETOROFU-ATOSA-DAKE | Synonym of ATSONUPURI | Kuril Islands | |
| ETOROFU-YAKE-YAMA [IVAN GROZNY] | Somma volcano of GROZNY GROUP | Kuril Islands | |
| EURH, JABAL EL | Cone of DHAMAR, HARRAS OF | Arabia | |
| EVANGELISTA, MT. | Cone of VULSINI | Italy | |
| EVANS KNOLL | Cone of HUDSON MOUNTAINS | Antarctica & South Sandwich Islands | |
| EVE | Cinder cone of EDZIZA | Canada | |
| EVE [GALLOSEULO] | Stratovolcano of HARGY | New Britain | |
| EVENSEN | Cone of SEAL NUNATAKS GROUP | Antarctica & South Sandwich Islands | |
| EVERITT HILL | Shield volcano of SHASTA | USA (California) | |
| EVERMANN, CERRO | Stratovolcano of SOCORRO | México | |
| EVLIYA TEPE | Dome of ERCIYES DAGI | Turkey | |
| EWEN, MT. | Cone of NEWER VOLCANICS PROV | Australia | |
| EXILE HILL | Cone of SPECTRUM RANGE | Canada | |
| EXPEDITION CRATER | Crater of RAOUL ISLAND | Kermadec Islands | |
| EXPEDITSII | Dome of BEZYMIANNY | Kamchatka Peninsula | |
| EYAFJALLA | Synonym of EYJAFJOLL | Iceland (southern) | |
| EYJAFJALLAJOKULL | Synonym of EYJAFJOLL | Iceland (southern) | |
| EYJAFJOLL | Stratovolcano | Historical | Iceland (southern) |
| EYRA | Fissure vent of BRENNISTEINSFJOLL | Iceland (southwestern) | |
| EZH [YEZH] | Dome of BOLSHOI SEMIACHIK | Kamchatka Peninsula | |
| FA'AFAFINE SEAMOUNT | Synonym of VAILULU'U | Samoan & Wallis Islands | |
| FAAMOTU | Cone of NIUAFO'OU | Tonga Islands | |
| FA'ANI | Cone of SAVAI'I | Samoan & Wallis Islands | |
| FA'ASEMENE | Tuff cone of TA'U | Samoan & Wallis Islands | |
| FAETE | Stratovolcano of ALBAN HILLS | Italy | |
| FAGALO | Cone of SAVAI'I | Samoan & Wallis Islands | |
| FAGAMAA | Tuff cone of TUTUILA | Samoan & Wallis Islands | |
| FAGATELE | Tuff cone of TUTUILA | Samoan & Wallis Islands | |
| FAGRADALSHRAUN | Shield volcano of KRISUVIK | Iceland (southwestern) | |
| FAGULULU | Synonym of IAMALELE | New Guinea & D'Entrecasteaux Islands | |
| FAIAL | Synonym of FAYAL | Azores | |
| FAINA | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| FAKO | Crater of CAMEROON | Africa (western) | |
| FALAISE, LA | Dome of PLAT PAYS, MORNE | West Indies | |
| FALCON ISLAND | Submarine volcano | Historical | Tonga Islands |
| FALEASAO | Tuff cone of TA'U | Samoan & Wallis Islands | |
| FALEN | Synonym of PARKER | Mindanao | |
| FALLING MOUNTAIN | Dome of TRIDENT | Alaska Peninsula | |
| FALLS CREEK [DRAGON CONE] | Cone of WELLS GRAY-CLEARWATER | Canada | |
| FALSO AZUFRE | Complex volcano | Holocene? | Northern Chile, Bolivia & Argentina |
| FANG | Stratovolcano of EREBUS | Antarctica & South Sandwich Islands | |
| FANTALE (FANTALI, FANTALLE) | Synonym of FENTALE | Africa (northeastern) & Red Sea | |
| FANTHAMS PEAK | Cone of TARANAKI [EGMONT] | New Zealand | |
| FANUA LAI | Synonym of FONUALEI | Tonga Islands | |
| FANUATAPU | Tuff ring of UPOLU | Samoan & Wallis Islands | |
| FARAGLIONE | Cone of VULCANO | Italy | |
| FARALLON A FORTUNA | Synonym of IOTO [IWO-JIMA] | Izu, Volcano, & Mariana Islands | |
| FARALLON DE PAJAROS | Stratovolcano | Historical | Izu, Volcano, & Mariana Islands |
| FARIS PEAK | Cone of WESTDAHL | Aleutian Islands | |
| FARM FLAT | Dome of LIAMUIGA | West Indies | |
| FARO, EL | Synonym of IZALCO | El Salvador & Honduras | |
| FAROL | Dome of TERCEIRA | Azores | |
| FASNIA, VOLCAN DE | Cinder cone of TENERIFE | Canary Islands | |
| FATHER, THE | Synonym of ULAWUN | New Britain | |
| FATOULEO-KAKOULO | Stratovolcano of NORTH VATE | Vanuatu | |
| FATUAGA POINT | Cone of OFU-OLOSEGA | Samoan & Wallis Islands | |
| FAUJAS, CRATERE | Crater of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| FAVARE | Thermal Feature of PANTELLERIA | Italy | |
| FAYAL | Stratovolcano | Historical | Azores |
| FEARN ISLAND | Synonym of HUNTER ISLAND | Pacific Ocean (southwestern) | |
| FEDON'S CAMP | Stratovolcano of ST. CATHERINE | West Indies | |
| FEDOTYCH | Shield volcano | Holocene? | Kamchatka Peninsula |
| FEFINA | Synonym of FALCON ISLAND | Tonga Islands | |
| FELL | Cinder cone of PALEI-AIKE VOLCANIC FIELD | Southern Chile & Argentina | |
| FELLSHRAUN | Crater Row of REYKJANES | Iceland (southwestern) | |
| FENI | Synonym of AMBITLE | New Ireland | |
| FENTALE | Stratovolcano | Historical | Africa (northeastern) & Red Sea |
| FENTE DU NORD, FUMEROLLE DE LA | Thermal Feature of SOUFRIERE GUADELOUPE | West Indies | |
| FERDINANDEA BANK [GUILA-FERDINANDEO] | Submarine vent of CAMPI FLEGREI MAR SICILIA | Italy | |
| FERLE | Cone of PANTELLERIA | Italy | |
| FERMIN, CERRO | Cinder cone of CRATER BASALT VOLCANIC FIELD | Southern Chile & Argentina | |
| FERN LAKE | Crater of YELLOWSTONE | USA (Wyoming) | |
| FERNAND | Stratovolcano of AMSTERDAM ISLAND | Indian Ocean (southern) | |
| FERNANDEZ, VOLCANO DE | Synonym of SHISHALDIN | Aleutian Islands | |
| FERNANDINA | Shield volcano | Historical | Galápagos Islands |
| FERRARIAS | Cone of SETE CIDADES | Azores | |
| FERRO | Synonym of HIERRO | Canary Islands | |
| FERRO, PICO DO | Dome of FURNAS | Azores | |
| FEUERBERG | Cone of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| FIAMOE | Cone of UPOLU | Samoan & Wallis Islands | |
| FIFTYTWO RIDGE | Tuya of WELLS GRAY-CLEARWATER | Canada | |
| FILAKOPI | Pumice cone of MILOS | Greece | |
| FILETE CRESTA MONTOSA | Caldera of COSIGUINA | Nicaragua | |
| FILETE EL YANKEE | Cone of COSIGUINA | Nicaragua | |
| FILETE LA SALVIA | Cone of COSIGUINA | Nicaragua | |
| FILO DELLO ZOLFO | Vent of STROMBOLI | Italy | |
| FIMERICH | Cone of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| FINCA LIEBRES, VOLCAN | Stratovolcano of TURRIALBA | Costa Rica | |
| FINCH, MT. | Stratovolcano of FISHER | Aleutian Islands | |
| FINLEY BUTTE | Cone of NEWBERRY | USA (Oregon) | |
| FIRE ISLAND | Dome of BOGOSLOF | Aleutian Islands | |
| FIRESTONE BUTTE | Cone of NEWBERRY | USA (Oregon) | |
| FIRGAS, MONTANA DE | Cone of GRAN CANARIA | Canary Islands | |
| FIRST | Dome of UZON | Kamchatka Peninsula | |
| FIRST RED HILL | Cinder cone of MARION ISLAND | Indian Ocean (southern) | |
| FISCHBACH | Cone of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| FISHER | Stratovolcano | Historical | Aleutian Islands |
| FISSURE BUTTE | Cinder cone of CRATERS OF THE MOON | USA (Idaho) | |
| FISSURE CONE | Lava cone of AXIAL SEAMOUNT | Pacific Ocean (northern) | |
| FISSURE CRATER | Crater of LANGILA | New Britain | |
| FITEKO | Cone of KIEYO | Africa (eastern) | |
| FITO | Cinder cone of UPOLU | Samoan & Wallis Islands | |
| FIUCHA | Stratovolcano of ANTILLANCA GROUP | Central Chile & Argentina | |
| FIUMICELLO | Tuff ring of CAMPI FLEGREI | Italy | |
| FJARBORG | Fissure vent of KRAFLA | Iceland (northeastern) | |
| FJARHOLADYDYNGJA | Shield volcano of ASKJA | Iceland (northeastern) | |
| FLAGDAHRAUN | Fissure vent of BARDARBUNGA | Iceland (northeastern) | |
| FLAMINGO LAKE | Crater of CENTRAL ISLAND | Africa (eastern) | |
| FLATADYNGJA | Shield volcano of ASKJA | Iceland (northeastern) | |
| FLATIRON | Cone of WELLS GRAY-CLEARWATER | Canada | |
| FLEALLIN | Synonym of ICHINSKY | Kamchatka Peninsula | |
| FLERI | Cinder cone of ETNA | Italy | |
| FLJOTAHRAUN | Fissure vent of KATLA | Iceland (southern) | |
| FLJOTSODDAHRAUN | Crater Row of GRIMSVOTN | Iceland (northeastern) | |
| FLOR, CERRO DE LA | Dome of LAJAS, LAS | Nicaragua | |
| FLORENCIA | Crater of GALERAS | Colombia | |
| FLORES | Volcanic field | Holocene | Guatemala |
| FLORES | Stratovolcanoes | Radiocarbon | Azores |
| FLORES, CERRO LAS | Dome of ZITACUARO-VALLE DE BRAVO | México | |
| FLORES, CERRO LAS | Cinder cone of NEGRO, CERRO | Nicaragua | |
| FLORES, LAS | Dome of ZITACUARO-VALLE DE BRAVO | México | |
| FLOTUDYNGJUHRAUN | Shield volcano of ASKJA | Iceland (northeastern) | |
| FLOURMILL | Cone of WELLS GRAY-CLEARWATER | Canada | |
| FOERSTNER | Submarine vent of PANTELLERIA | Italy | |
| FOGALEPULU | Cone of UPOLU | Samoan & Wallis Islands | |
| FOGAPOA | Cone of SAVAI'I | Samoan & Wallis Islands | |
| FOGO | Synonym of AGUA DE PAU | Azores | |
| FOGO | Stratovolcano | Historical | Cape Verde Islands |
| FOGO, CABECO DO | Cone of FAYAL | Azores | |
| FOGO, LAGOA DO | Pleistocene caldera of AGUA DE PAU | Azores | |
| FOGRUFJOLL | Fissure vent of LOKI-FOGRUFJOLL | Iceland (northeastern) | |
| FONCK | Cinder cone of TRONADOR | Southern Chile & Argentina | |
| FOND DOUX | Cone of QUALIBOU | West Indies | |
| FONDI DI BAIA | Tuff ring of CAMPI FLEGREI | Italy | |
| FONDO FERRARO | Dome of ISCHIA | Italy | |
| FONDO RICCIO | Cone of CAMPI FLEGREI | Italy | |
| FONTAIPE, CRATERE | Crater of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| FONTAN | Dome of GHEGAM RIDGE | Caucasus, Georgia & Armenia | |
| FONTPOBRA, VOLCA | Cone of OLOT VOLCANIC FIELD | Western Europe | |
| FONTUR | Fissure vent of BARDARBUNGA | Iceland (northeastern) | |
| FONUA FO'OU | Synonym of FALCON ISLAND | Tonga Islands | |
| FONUAFOOA | Synonym of METIS SHOAL | Tonga Islands | |
| FONUALEI | Stratovolcano | Historical | Tonga Islands |
| FORECAST SEAMOUNT | Submarine volcano | Fumarolic | Izu, Volcano, & Mariana Islands |
| FOREST HILL | Cone of NEWER VOLCANICS PROV | Australia | |
| FORGIA VECCHIA | Vent of LIPARI | Italy | |
| FORGIA VECCHIA | Crater of VULCANO | Italy | |
| FORGOTTEN CONE | Cinder cone of CRATER LAKE | USA (Oregon) | |
| FORGOTTEN CRATER [WILLIAMS CRATER] | Crater of CRATER LAKE | USA (Oregon) | |
| FORKED BUTTE | Cinder cone of JEFFERSON | USA (Oregon) | |
| FORMICA LEO | Crater of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| FORNEAU | Cone of AMSTERDAM ISLAND | Indian Ocean (southern) | |
| FORT DE KOCK | Synonym of MARAPI | Sumatra | |
| FORT PORTAL | Tuff cones | Holocene | Africa (central) |
| FORT SELKIRK | Volcanic field | Holocene? | Canada |
| FORTUNA, CERRO | Dome of RINCON DE LA VIEJA | Costa Rica | |
| FOSSA | Crater of STROMBOLI | Italy | |
| FOSSA CARBONARA | Dome of PANTELLERIA | Italy | |
| FOSSA DEL RUSSO | Dome of PANTELLERIA | Italy | |
| FOSSA GRANDE | Thermal Feature of VULCANO | Italy | |
| FOSSA LUPARA | Crater of CAMPI FLEGREI | Italy | |
| FOSSA PAGANI | Cinder cone of ETNA | Italy | |
| FOSSA, CALDERA DELLA | Caldera of VULCANO | Italy | |
| FOSSA, LA | Tuff cone of VULCANO | Italy | |
| FOSSAMONACA | Vent of VESUVIUS | Italy | |
| FOSSETTA | Crater of STROMBOLI | Italy | |
| FOSTER CRATER | Cone of ROYAL SOCIETY RANGE | Antarctica & South Sandwich Islands | |
| FOUMBOT VOLC FIELD | Synonym of OKU VOLCANIC FIELD | Africa (western) | |
| FOUNTAIN VENT | Thermal Feature of CLEFT SEGMENT | Pacific Ocean (northern) | |
| FOUQUE | Dome of SANTORINI | Greece | |
| FOUR CRATERS LAVA FIELD | Volcanic field | Holocene? | USA (Oregon) |
| FOUR PEAKS, ISLAND OF THE | Synonym of FOURPEAKED | Alaska Peninsula | |
| FOUR-IN-ONE CONE | Cinder cone of NORTH SISTER FIELD | USA (Oregon) | |
| FOURCHE, PITON DE | Cinder cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| FOURMILE HILL | Cone of MEDICINE LAKE | USA (California) | |
| FOURNAISE, PITON DE LA | Shield volcano | Historical | Indian Ocean (western) |
| FOURPEAKED | Stratovolcano | Historical | Alaska Peninsula |
| FOURTH TOP | Dome of SHIVELUCH | Kamchatka Peninsula | |
| FOUS, MORNE | Dome of PLAT PAYS, MORNE | West Indies | |
| FOX HILL CONE | Cinder cone of ST. PAUL ISLAND | Alaska (western) | |
| FRAILE, MONTAÑA | Cone of TENERIFE | Canary Islands | |
| FRAILE, PICO DEL | Dome of TOLUCA, NEVADO DE | México | |
| FRAILE, VOLCAN EL | Stratovolcano of POPOCATEPETL | México | |
| FRAILES, LOS [CERRO NOCARNE] | Dome of CHACHANI, NEVADO | Perú | |
| FRAILES, MONTANA DE LOS | Cinder cone of HIERRO | Canary Islands | |
| FRAISSE, PUY DE | Cone of CHAINE DES PUYS | Western Europe | |
| FRANKLIN, MT. | Cone of NEWER VOLCANICS PROV | Australia | |
| FRASCATI | Crater of ALBAN HILLS | Italy | |
| FRAWLEY, CERRO | Cinder cone of NEJAPA-MIRAFLORES | Nicaragua | |
| FRAY CARLOS, CERRO | Stratovolcano of TINGUIRIRICA | Central Chile & Argentina | |
| FRAZER, MT. | Cone of NEWER VOLCANICS PROV | Australia | |
| FRED HUDSON CRATER | Crater of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| FRED'S HILL | Cone of MARION ISLAND | Indian Ocean (southern) | |
| FREEMAN PEAK | Synonym of YOUNG ISLAND | Antarctica & South Sandwich Islands | |
| FREMRINAMUR | Stratovolcano | Tephrochronology | Iceland (northeastern) |
| FRENCHMEN'S SOLFATARA | Thermal Feature of SURETAMATAI | Vanuatu | |
| FRESNO, CERRO | Shield volcano of MICHOACAN-GUANAJUATO | México | |
| FROSTY | Stratovolcanoes | Holocene | Alaska Peninsula |
| FRUMENTO DELLA CONCAZZE, MONTE | Cinder cone of ETNA | Italy | |
| FRUMENTO SUPINO, MONTE | Cinder cone of ETNA | Italy | |
| FRUMENTO, MONTE | Cinder cone of ETNA | Italy | |
| FRUTILLA, CERRO | Cone of ANTILLANCA GROUP | Central Chile & Argentina | |
| FUALUA | Cone of SAVAI'I | Samoan & Wallis Islands | |
| FUBO-ZAN | Stratovolcano of ZAO | Honshu | |
| FUCHICH | Synonym of CENTRAL ISLAND | Africa (eastern) | |
| FUDESHIMA | Stratovolcano of OSHIMA | Izu, Volcano, & Mariana Islands | |
| FUDO-IKE | Crater of KIRISHIMA | Ryukyu Islands & Kyushu | |
| FUE SAN | Synonym of SARYCHEV PEAK | Kuril Islands | |
| FUEGO | Stratovolcano | Historical | Guatemala |
| FUEGO DE COLIMA | Synonym of COLIMA | México | |
| FUEGO DE TIMANFAYA, MONTANAS DEL [QUEMADA | Crater of LANZAROTE | Canary Islands | |
| FUEGO, MONTANAS DEL | Cone of LANZAROTE | Canary Islands | |
| FUEGO, VOLCAN DE | Synonym of COLIMA | México | |
| FUEGUINO | Lava domes | Historical | Southern Chile & Argentina |
| FUEGUINO, VOLCAN | Synonym of FUEGUINO | Southern Chile & Argentina | |
| FUENCALIENTE, CALDERA DE [CORAZONCILLO] | Crater of LANZAROTE | Canary Islands | |
| FUENCALIETNE [SAN ANTONIO] | Cinder cone of LA PALMA | Canary Islands | |
| FUERTEVENTURA | Fissure vents | Holocene | Canary Islands |
| FUGEN-DAKE | Stratovolcano of UNZEN | Ryukyu Islands & Kyushu | |
| FUGENDAKE-SANCHO | Dome of UNZEN | Ryukyu Islands & Kyushu | |
| FUI, VOLCANES DE | Cinder cone of MOCHO-CHOSHUENCO | Central Chile & Argentina | |
| FUI'AVEA | Cone of SAVAI'I | Samoan & Wallis Islands | |
| FUJI | Stratovolcano | Historical | Honshu |
| FUJI-SAN | Synonym of FUJI | Honshu | |
| FUJI-SAN | Dome of TAKAHARA | Honshu | |
| FUJIGA-DAKE | Synonym of FUJI | Honshu | |
| FUJIMIKUBO | Tuff ring of IZU-TOBU | Honshu | |
| FUKENO-YU | Thermal Feature of HACHIMANTAI | Honshu | |
| FUKIAGE-ONSEN | Thermal Feature of ONIKOBE | Honshu | |
| FUKUE-JIMA | Shield volcanoes | Tephrochronology | Ryukyu Islands & Kyushu |
| FUKUJIN | Submarine volcano | Historical | Izu, Volcano, & Mariana Islands |
| FUKUJIN-KAIZAN | Synonym of FUKUJIN | Izu, Volcano, & Mariana Islands | |
| FUKUJIN-NAKANOBA | Synonym of MINAMI KASUGA | Izu, Volcano, & Mariana Islands | |
| FUKUJIN-OKANOBA | Synonym of FUKUJIN | Izu, Volcano, & Mariana Islands | |
| FUKUKAZEANA-YAMA | Synonym of FUJI | Honshu | |
| FUKUTOKU-OKANOBA | Submarine volcano | Historical | Izu, Volcano, & Mariana Islands |
| FUMAROLE | See proper name (e.g. GAMOULI, FUMAROLE FIELD OF) | ||
| FUMAROLE VALLEY | Thermal Feature of LONG VALLEY | USA (California) | |
| FUMAROLES, LAS | Thermal Feature of IRAZU | Costa Rica | |
| FUMAROLLES, MONT DES | Thermal Feature of KERGUELEN ISLANDS | Indian Ocean (southern) | |
| FUMEROLLE | See proper name (e.g. LACROIX, FUMEROLLE) | French for FUMAROLE | |
| FUNABARA | Cinder cone of IZU-TOBU | Honshu | |
| FUNDA DA CALDIERA | Cone of FAYAL | Azores | |
| FUNDA DE LAJES, CALDEIRA | Tuff ring of FLORES | Azores | |
| FUNDA, LAGOA | Stratovolcano of FLORES | Azores | |
| FUNDERA | Crater of ISCHIA | Italy | |
| FUNKA-ASANE | Crater of KITA-IWO-JIMA | Izu, Volcano, & Mariana Islands | |
| FUPPUSHI | Stratovolcano of AKAN | Hokkaido | |
| FUPPUSHI-DAKE | Stratovolcano of SHIKOTSU | Hokkaido | |
| FUREBETSU | Stratovolcano of AKAN | Hokkaido | |
| FURIHATA-YAMA | Dome of SAKURA-JIMA | Ryukyu Islands & Kyushu | |
| FURNA | Cone of PICOS VOLCANIC SYSTEM | Azores | |
| FURNAS | Stratovolcano | Historical | Azores |
| FURO-SEN | Thermal Feature of TSURUMI | Ryukyu Islands & Kyushu | |
| FURU-TAKE | Stratovolcano of KUCHINOERABU-JIMA | Ryukyu Islands & Kyushu | |
| FURUMIO | Maar of MIYAKE-JIMA | Izu, Volcano, & Mariana Islands | |
| FUSS PEAK | Stratovolcano | Historical | Kuril Islands |
| FUTAGO-MINE | Cone of KITA YATSUGA-TAKE | Honshu | |
| FUTAGO-YAMA | Dome of HAKONE | Honshu | |
| FUTAGO-YAMA | Cone of FUJI | Honshu | |
| FUTAGO-YAMA | Dome of KUSATSU-SHIRANE | Honshu | |
| FUTAGO-YAMA | Cone of OSHIMA | Izu, Volcano, & Mariana Islands | |
| FUTAGOISHI | Stratovolcano of KIRISHIMA | Ryukyu Islands & Kyushu | |
| FUTAMATA-YAMA | Stratovolcano of NASU | Honshu | |
| FUTATSU-DAKE | Dome of HARUNA | Honshu | |
| FUTATSU-ISHI | Stratovolcano of KIRISHIMA | Ryukyu Islands & Kyushu | |
| FUTATSU-YAMA | Cone of FUJI | Honshu | |
| FUTATSUZUKA | Cone of FUJI | Honshu | |
| FUTIGA | Cone of TUTUILA | Samoan & Wallis Islands | |
| FUYA FUYA | Stratovolcano of MOJANDA | Ecuador | |
| FUYOGA-MINE | Synonym of FUJI | Honshu | |
| FUZZTAIL BUTTE | Cone of NEWBERRY | USA (Oregon) | |
| FYRIPLAKA | Tuff ring of MILOS | Greece | |
| GABELLOTTO-FIUME BIANCO | Stratovolcano of LIPARI | Italy | |
| GABII [CASTIGLIONE] | Crater of ALBAN HILLS | Italy | |
| GABILLEMA | Stratovolcano | Holocene | Africa (northeastern) & Red Sea |
| GABLAYTU | Shield volcano of MANDA HARARO | Africa (northeastern) & Red Sea | |
| GABRIEL, MT. | Cone of AUCKLAND FIELD | New Zealand | |
| GABRIELSE CONE | Cinder cone of TUYA VOLCANIC FIELD | Canada | |
| GABULI | Synonym of DALAFFILLA | Africa (northeastern) & Red Sea | |
| GADA ALE | Stratovolcano | Holocene | Africa (northeastern) & Red Sea |
| GADAMSA CALDERA | Synonym of GEDAMSA CALDERA | Africa (northeastern) & Red Sea | |
| GADANG, GUNUNG | Synonym of KERINCI | Sumatra | |
| GADIR, CUDDIA DEL | Shield volcano of PANTELLERIA | Italy | |
| GADJAH [GAJAH] | Crater of GUNTUR | Java | |
| GADJAHMOENGKOER [GAJAMUNKUR] | Dome of KELUT | Java | |
| GAFANHOTO | Cone of FURNAS | Azores | |
| GAFURANINDI | Cone of NYAMURAGIRA | Africa (central) | |
| GAGA SPA | Thermal Feature of ZAO | Honshu | |
| GAGAK, GUNUNG | Stratovolcano of PERBAKTI-GAGAK | Java | |
| GAGE HILL | Tuya of WELLS GRAY-CLEARWATER | Canada | |
| GAGES LOWER SOUFRIERE | Thermal Feature of SOUFRIERE HILLS | West Indies | |
| GAGE'S MOUNTAIN | Dome of SOUFRIERE HILLS | West Indies | |
| GAGES UPPER SOUFRIERE | Thermal Feature of SOUFRIERE HILLS | West Indies | |
| GAGUA | Synonym of CAGUA | Luzon | |
| GAGXANUL | Synonym of SANTA MARIA | Guatemala | |
| GAHI | Tuff cone of WALLIS ISLANDS | Samoan & Wallis Islands | |
| GAHINGA | Cone of MUHAVURA | Africa (central) | |
| GAIA [TAVURVUR] | Stratovolcano of RABAUL | New Britain | |
| GAIRIA, CALDERA DE | Cinder cone of FUERTEVENTURA | Canary Islands | |
| GAITAL, CERRO | Dome of VALLE, EL | Panamá | |
| GAJA-JIMA | Stratovolcano | Holocene? | Ryukyu Islands & Kyushu |
| GAJAH | Cone of SARIK-GAJAH | Sumatra | |
| GAJAH | Crater of GUNTUR | Java | |
| GAJAMUNGKUR | Dome of KELUT | Java | |
| GAJOLESTEN | Synonym of KEMBAR | Sumatra | |
| GAKARARANGA | Cone of NYAMURAGIRA | Africa (central) | |
| GAKUROKUJI | Dome of KUJU | Ryukyu Islands & Kyushu | |
| GALAN, MONTE | Caldera of MOMOTOMBO | Nicaragua | |
| GALAPAGO, CERRO [LAS MAJADAS] | Stratovolcano of SANTA MARIA | Guatemala | |
| GALAPAGOS RIFT | Submarine volcano | Historical | Pacific Ocean (eastern) |
| GALATEA | Submarine vent of CAMPI FLEGREI MAR SICILIA | Italy | |
| GALERA, LA | Synonym of GALERAS | Colombia | |
| GALERAS | Complex volcano | Historical | Colombia |
| GALION | Thermal Feature of PLAT PAYS, MORNE | West Indies | |
| GALLEGO | Volcanic field | Holocene? | Bougainville & Solomon Islands |
| GALLO | Vent of PANTELLERIA | Italy | |
| GALLO CANTANO | Dome of ATACAZO | Ecuador | |
| GALLO, CERRO | Dome of RINCON DE LA VIEJA | Costa Rica | |
| GALLO, CERRO EL | Dome of AZUFRES, LOS | México | |
| GALLO, CUDDIA DEL | Dome of PANTELLERIA | Italy | |
| GALLOP | Synonym of CENTRAL ISLAND | Africa (eastern) | |
| GALLOSEULO | Stratovolcano of HARGY | New Britain | |
| GALLOWAY, MT. | Cone of ANTIPODES ISLAND | Pacific Ocean (southern) | |
| GALOENGGOENG | Synonym of GALUNGGUNG | Java | |
| GALUNGGUNG | Stratovolcano | Historical | Java |
| GALWAY'S MOUNTAIN | Dome of SOUFRIERE HILLS | West Indies | |
| GALWAY'S SOUFRIERE | Thermal Feature of SOUFRIERE HILLS | West Indies | |
| GAM ITJI, LAKE | Maar of IBU | Halmahera | |
| GAMALAMA | Stratovolcanoes | Historical | Halmahera |
| GAMBIER, MT. | Maar of NEWER VOLCANICS PROV | Australia | |
| GAMBOULI, FUMAROLE FIELD OF | Synonym of BOINA | Africa (northeastern) & Red Sea | |
| GAMCHEN | Complex volcano | Tephrochronology | Kamchatka Peninsula |
| GAMCHENSKY | Synonym of GAMCHEN | Kamchatka Peninsula | |
| GAMKANORA | Synonym of GAMKONORA | Halmahera | |
| GAMKONORA | Stratovolcano | Historical | Halmahera |
| GAMKUNORA | Synonym of GAMKONORA | Halmahera | |
| GAMMA HOT SPRINGS | Thermal Feature of GLACIER PEAK | USA (Washington) | |
| GAMMACANORE | Synonym of GAMKONORA | Halmahera | |
| GAMMAKUNOWA | Synonym of GAMKONORA | Halmahera | |
| GAMPING | Crater of LAWU | Java | |
| GAMTSCHEN | Synonym of GAMCHEN | Kamchatka Peninsula | |
| GAN-ANA | Vent of FUJI | Honshu | |
| GANANIAS, MONTAÑA | Cone of TENERIFE | Canary Islands | |
| GANAYA | Cone of NYIRAGONGO | Africa (central) | |
| GANDAPURA | Stratovolcano of KAMOJANG, KAWAH | Java | |
| GANDO-SAN | Stratovolcano of ZAO | Honshu | |
| GANJU-SAN (GANZYU-SAN) | Synonym of IWATE | Honshu | |
| GAOLULE | Synonym of DALAFFILLA | Africa (northeastern) & Red Sea | |
| GAOSHAN | Cinder cone of ARSHAN | China (eastern) | |
| GAOSHANLING | Pyroclastic Cone of HAINAN DAO | Southeast Asia | |
| GAOZHI | Cone of TENGCHONG | Southeast Asia | |
| GAR-ULI | Synonym of MA ALALTA | Africa (northeastern) & Red Sea | |
| GARACHICO, VOLCAN DE | Cinder cone of TENERIFE | Canary Islands | |
| GARAFIA | Shield volcano of LA PALMA | Canary Islands | |
| GARAN-DAKE | Dome of TSURUMI | Ryukyu Islands & Kyushu | |
| GARAT, MT. | Cone of GAUA | Vanuatu | |
| GARBES | Fumarole field | Pleistocene-Fumarolic | Africa (northeastern) & Red Sea |
| GARBUNA GROUP | Stratovolcanoes | Historical | New Britain |
| GARCA, PUIG DE LA | Cone of OLOT VOLCANIC FIELD | Western Europe | |
| GARDA, MONTANA | Cone of TENERIFE | Canary Islands | |
| GARDNERS ISLAND | Synonym of FONUALEI | Tonga Islands | |
| GARELOI | Stratovolcano | Historical | Aleutian Islands |
| GARET CHALFALLA | Cone of HARUJ | Africa (northern) | |
| GARET EL GRAABIA | Cone of HARUJ | Africa (northern) | |
| GARET, MT. [MT. GARAT] | Cone of GAUA | Vanuatu | |
| GARIBALDI | Stratovolcano | Radiocarbon | Canada |
| GARIBALDI HILL | Stratovolcano of SOUFRIERE HILLS | West Indies | |
| GARIBALDI LAKE | Volcanic field | Holocene | Canada |
| GARIBOLDI | Synonym of KONE | Africa (northeastern) & Red Sea | |
| GARIBOLDI CALDERA | Caldera of KONE | Africa (northeastern) & Red Sea | |
| GARNOT ISLAND | Synonym of BLUP BLUP | Northeast of New Guinea | |
| GAROK SPRING | Thermal Feature of APO | Mindanao | |
| GAROU, MORNE | Synonym of SOUFRIERE ST. VINCENT | West Indies | |
| GAROVE | Stratovolcano | Holocene | New Britain |
| GARRINADA, VOLCA LA | Cone of OLOT VOLCANIC FIELD | Western Europe | |
| GARROTXA VOLC FIELD | Synonym of OLOT VOLCANIC FIELD | Western Europe | |
| GARU, MORNE | Synonym of SOUFRIERE ST. VINCENT | West Indies | |
| GARUA HARBOUR | Volcanic field | Holocene? | New Britain |
| GAS ROCKS, THE | Dome of UKINREK MAARS | Alaska Peninsula | |
| GASENYI | Cone of NYAMURAGIRA | Africa (central) | |
| GASHOVU | Cone of NYAMURAGIRA | Africa (central) | |
| GASPAR, PICO DO | Dome of FURNAS | Azores | |
| GAUA | Stratovolcano | Historical | Vanuatu |
| GAUDAL, VOLCAN | Stratovolcano of SAN PEDRO-PELLADO | Central Chile & Argentina | |
| GAURO | Tuff cone of CAMPI FLEGREI | Italy | |
| GAVRILOVA | Stratovolcano of VYSOKY | Kamchatka Peninsula | |
| GAYOLESTEN | Synonym of KEMBAR | Sumatra | |
| GEBEL | See proper name (e.g. TEER, GEBEL) | Italian spelling of Arabic term for MT. | |
| GEBOEG, GUNUNG [GUNUNG GEBUG] | Cone of ARJUNO-WELIRANG | Java | |
| GEBUG, GUNUNG | Cone of ARJUNO-WELIRANG | Java | |
| GEDAMSA CALDERA | Caldera | Holocene | Africa (northeastern) & Red Sea |
| GEDE | Stratovolcano | Historical | Java |
| GEDEH | Synonym of GEDE | Java | |
| GEDEMSA CALDERA | Synonym of GEDAMSA CALDERA | Africa (northeastern) & Red Sea | |
| GEDROITS, MOUNT | Dome of SMIRNOV | Kuril Islands | |
| GEGAMSK UPLAND | Synonym of GHEGAM RIDGE | Caucasus, Georgia & Armenia | |
| GEGER HALANG | Pleistocene caldera of CEREME | Java | |
| GEIRFUGLADRANGUR | Submarine vent of REYKJANESHRYGGUR | Iceland (southwestern) | |
| GEIRFUGLASKER | Cone of VESTMANNAEYJAR | Iceland (southern) | |
| GEISERS | See proper name (e.g. COPACOYA, GEISERS DE) | Spanish for GEYSER | |
| GEITLANDSHRAUN | Fissure vent of PRESTAHNUKUR | Iceland (southwestern) | |
| GEIZERNAYA | Dome of UZON | Kamchatka Peninsula | |
| GELAMAN, GUNUNG | Cone of IJEN | Java | |
| GELFISER, MONTE | Cone of PANTELLERIA | Italy | |
| GELI MUTU (GELI MOETOE) | Synonym of KELIMUTU | Lesser Sunda Islands | |
| GELIMOEN [GELIMUN] | Crater of LEROBOLENG | Lesser Sunda Islands | |
| GELIMUN | Crater of LEROBOLENG | Lesser Sunda Islands | |
| GELKHAMAR, MONTE | Cone of PANTELLERIA | Italy | |
| GELLIBRAND, MT. | Cone of NEWER VOLCANICS PROV | Australia | |
| GELSO | Thermal Feature of VULCANO | Italy | |
| GEMBONG, GUNUNG | Maar of MURIA | Java | |
| GEMELKERET | Crater of SURETAMATAI | Vanuatu | |
| GEMELLARO, MONTE | Cinder cone of ETNA | Italy | |
| GEMOLONG | Crater of LAWU | Java | |
| GEMUNDENER | Maar of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| GEMURAH BADAS | Thermal Feature of BESAR | Sumatra | |
| GEMURAH BUBUR | Thermal Feature of BESAR | Sumatra | |
| GEMURAH ILAHAN | Thermal Feature of BESAR | Sumatra | |
| GEMURAH KENININGAN | Thermal Feature of BESAR | Sumatra | |
| GENDAL, KAWAH | Thermal Feature of MERAPI | Java | |
| GENDINGWALUH, GUNUNG | Cone of IJEN | Java | |
| GENDOL, KAWAH | Thermal Feature of MERBABU | Java | |
| GENGI, VOLCA | Cone of OLOT VOLCANIC FIELD | Western Europe | |
| GENI, GUNUNG | Cone of LAMONGAN | Java | |
| GENOVESA | Shield volcano | Holocene | Galápagos Islands |
| GENTA-ANA | Crater of USU | Hokkaido | |
| GENTENG, GUNUNG | Cone of IJEN | Java | |
| GENUK | Dome of MURIA | Java | |
| GEODESISTOY | Shield volcano | Holocene? | Kamchatka Peninsula |
| GEORGIOS | Dome of SANTORINI | Greece | |
| GERALDINO | Synonym of PINTA | Galápagos Islands | |
| GERENTE, LE | Crater of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| GERMAV TEPE | Dome of NEMRUT DAGI | Turkey | |
| GEROKGAK HOT SPRING | Thermal Feature of BRATAN | Lesser Sunda Islands | |
| GERVASI, MONTE | Cinder cone of ETNA | Italy | |
| GESI | Crater of LAWU | Java | |
| GESTSSTADAVATN | Maar of KRISUVIK | Iceland (southwestern) | |
| GETANG | Crater of KOROSI | Africa (eastern) | |
| GETLANDSHRAUN [GEITLANDSHRAUN] | Fissure vent of PRESTAHNUKUR | Iceland (southwestern) | |
| GEULIS | Crater of GUNTUR | Java | |
| GEUREUDONG | Stratovolcano | Pleistocene-Fumarolic | Sumatra |
| GEYSER BIGHT | Thermal Feature of RECHESCHNOI | Aleutian Islands | |
| GEYSER VALLEY | Thermal Feature of MAROA | New Zealand | |
| GEYSERNAYA [GEYZERNAYA] | Pleistocene caldera of UZON | Kamchatka Peninsula | |
| GEYSERS | See proper name (e.g. IXTLAN, GEYSERS DE) | ||
| GEYSERS, THE | Thermal Feature of CLEAR LAKE | USA (California) | |
| GEYSERS, VALLEY OF | Thermal Feature of UZON | Kamchatka Peninsula | |
| GEYSIR | Thermal Feature of LANGJOKULL | Iceland (southwestern) | |
| GEYSIR | Stratovolcano | Pleistocene-Geysers | Iceland (southwestern) |
| GEYZERNAYA | Pleistocene caldera of UZON | Kamchatka Peninsula | |
| GHAIE [TAVURVUR] | Stratovolcano of RABAUL | New Britain | |
| GHARAT, MT. [MT. GARAT] | Cone of GAUA | Vanuatu | |
| GHEGAM RIDGE | Volcanic field | Anthropology | Caucasus, Georgia & Armenia |
| GHEGHASSAR | Dome of GHEGAM RIDGE | Caucasus, Georgia & Armenia | |
| GHENTOLUG | Stratovolcano of SURETAMATAI | Vanuatu | |
| GHERAKI | Tuff ring of MILOS | Greece | |
| GHOST | Crater of WALLIS ISLANDS | Samoan & Wallis Islands | |
| GIANO | Dome of TULLU MOJE | Africa (northeastern) & Red Sea | |
| GIANT CRATER | Crater of MEDICINE LAKE | USA (California) | |
| GIANTI | Stratovolcano of SUMBING | Java | |
| GIARDINA, MONTE | Dome of LIPARI | Italy | |
| GIBBON HILL | Dome of YELLOWSTONE | USA (Wyoming) | |
| GIBELE, MONTE | Thermal Feature of PANTELLERIA | Italy | |
| GIBILLE, MONTI | Dome of PANTELLERIA | Italy | |
| GIBRUS | Crater of WHITE ISLAND | New Zealand | |
| GIFFORD PEAK | Shield volcano of INDIAN HEAVEN | USA (Washington) | |
| GIGANTE, CERRO | Cinder cone of MOYUTA | Guatemala | |
| GIGGENBACH | Submarine volcano | Fumarolic | Kermadec Islands |
| GIGIR AT STORKONUGJA | Crater Row of BRENNISTEINSFJOLL | Iceland (southwestern) | |
| GIGOLDUGJOSKA | Crater Row of ASKJA | Iceland (northeastern) | |
| GIGUAN | Synonym of SEGUAM | Aleutian Islands | |
| GIL | Synonym of SANTIAGO | Galápagos Islands | |
| GILBERT DOME | Dome of LONG VALLEY | USA (California) | |
| GILBOA HILL | Stratovolcano of QUILL, THE | West Indies | |
| GILLETT NUNATAKS | Cone of TONEY MOUNTAIN | Antarctica & South Sandwich Islands | |
| GILLIVER | Former crater of WHITE ISLAND | New Zealand | |
| GILOLO | Synonym of JAILOLO | Halmahera | |
| GIMBALA, JEBEL | Synonym of MARRA, JEBEL | Africa (northern) | |
| GIMIE, MT. | Stratovolcano of QUALIBOU | West Indies | |
| GIN-NUMA | Crater of USU | Hokkaido | |
| GINNA ALE | Synonym of ERTA ALE | Africa (northeastern) & Red Sea | |
| GINSILIBAN, MT. | Stratovolcano of CAMIGUIN | Mindanao | |
| GIPPS ISLAND | Synonym of NARAGE | New Britain | |
| GIRA-LE-KOMA | Cone of ARDOUKOBA | Africa (northeastern) & Red Sea | |
| GIRDLESTONE | Crater of RUAPEHU | New Zealand | |
| GIREKOL | Unknown | Holocene | Turkey |
| GIRUNGO-NAMLAGIRA | Synonym of NYAMURAGIRA | Africa (central) | |
| GISBORNE, MT. | Cone of NEWER VOLCANICS PROV | Australia | |
| GISI | Cone of NYIRAGONGO | Africa (central) | |
| GITEBE | Cone of NYAMURAGIRA | Africa (central) | |
| GITURO | Cone of NYAMURAGIRA | Africa (central) | |
| GIULIA-FERDINANDEO | Submarine vent of CAMPI FLEGREI MAR SICILIA | Italy | |
| GIUMOUSH | Dome of GHEGAM RIDGE | Caucasus, Georgia & Armenia | |
| GIUTURNA | Crater of ALBAN HILLS | Italy | |
| GIWU PEAK | Cone of LOLOBAU | New Britain | |
| GJALP | Fissure vent of GRIMSVOTN | Iceland (northeastern) | |
| GJASTYKKISBUNGA | Shield volcano of KRAFLA | Iceland (northeastern) | |
| GLAA, EL | Cone of HARUJ | Africa (northern) | |
| GLACE, PITON | Cinder cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| GLACIER | Dome of EDZIZA | Canada | |
| GLACIER PEAK | Stratovolcano | Tephrochronology | USA (Washington) |
| GLACIER PIKES | Dome of GARIBALDI | Canada | |
| GLADKY | Dome of BEZYMIANNY | Kamchatka Peninsula | |
| GLANVILLIA HOT SPRINGS | Thermal Feature of DIABLOTINS, MORNE | West Indies | |
| GLASS CREEK | Dome of INYO CRATERS | USA (California) | |
| GLASS MOUNTAIN | Dome of MEDICINE LAKE | USA (California) | |
| GLASS MOUNTAIN | Dome of LONG VALLEY | USA (California) | |
| GLAVNY | Cinder cone of KOSTAKAN | Kamchatka Peninsula | |
| GLENBERVIE [MARUATA] | Cone of WHANGAREI | New Zealand | |
| GLI MOETOE | Synonym of KELIMUTU | Lesser Sunda Islands | |
| GLINDO | Vent of PANTELLERIA | Italy | |
| GLORIA, CERRO LA | Cinder cone of ZITACUARO-VALLE DE BRAVO | México | |
| GLORIA, CERRO LA | Dome of COATEPEQUE CALDERA | El Salvador & Honduras | |
| GLORIA, LA | Volcanic field | Holocene | México |
| GOAN | Cone of BAYUDA VOLCANIC FIELD | Africa (northern) | |
| GOAT BUTTE | Cinder cone of ADAMS | USA (Washington) | |
| GOAT ROCKS | Former dome of ST. HELENS | USA (Washington) | |
| GOAT'S PEAK | Dome of JEFFERSON | USA (Oregon) | |
| GOD, MOUNTAIN OF | Synonym of LENGAI, OL DOINYO | Africa (eastern) | |
| GODAGI | Cone of MANAM | Northeast of New Guinea | |
| GOEHA SONGGADIKIT | Crater of BATUR | Lesser Sunda Islands | |
| GOENTOER | Synonym of GUNTUR | Java | |
| GOF | See proper name (e.g. DAKARA, GOF) | Kenyan term for HILL | |
| GOF DUKANA | Maar of MEGA BASALT FIELD | Africa (northeastern) & Red Sea | |
| GOG | Synonym of GAUA | Vanuatu | |
| GOGDAG | Dome of ERCIYES DAGI | Turkey | |
| GOGODOM, GUNUNG | Crater of DUKONO | Halmahera | |
| GOK DAG | Dome of ERCIYES DAGI | Turkey | |
| GOLAN | Cone of MEGA BASALT FIELD | Africa (northeastern) & Red Sea | |
| GOLAN HEIGHTS | Volcanic field | Holocene | Syria |
| GOLAYA | Stratovolcano | Holocene | Kamchatka Peninsula |
| GOLDEN GATE | Tuff cone of PRINCE EDWARD ISLAND | Indian Ocean (southern) | |
| GOLDEN TROUT CREEK | Volcanic field | Tephrochronology | USA (California) |
| GOLETS-TORNYI GROUP | Pyroclastic cones | Holocene? | Kuril Islands |
| GOLFO, EL | Shield volcano of HIERRO | Canary Islands | |
| GOLGAT | Cone of ARAGATS | Caucasus, Georgia & Armenia | |
| GOLGOL | Pyroclastic Cone of PUYEHUE-CORDON CAULLE | Central Chile & Argentina | |
| GOLLU DAG | Lava dome | Holocene? | Turkey |
| GOLOVNIN | Caldera | Historical | Kuril Islands |
| GOLTEPE | Cone of NEMRUT DAGI | Turkey | |
| GOLUBOE OZERO HOT SPRING | Thermal Feature of BARANSKY | Kuril Islands | |
| GOLYGINA (GOLYGINSKI) | Synonym of KHODUTKA | Kamchatka Peninsula | |
| GOLYI | Shield volcano of VISOKIY | Kamchatka Peninsula | |
| GOMA, MONT | Cone of NYIRAGONGO | Africa (central) | |
| GOMA, MONTE | Cinder cone of ETNA | Italy | |
| GOMON-ISHI | Dome of TOWADA | Honshu | |
| GOMULION [KOMOLION] | Vent of KOROSI | Africa (eastern) | |
| GOMWA BAY-SALAMO AREA | Thermal Feature of DAWSON STRAIT GROUP | New Guinea & D'Entrecasteaux Islands | |
| GONDANG | Dome of TENGGER CALDERA | Java | |
| GONGEN-IKE | Crater of NORIKURA | Honshu | |
| GONGEN-YAMA | Dome of SAKURA-JIMA | Ryukyu Islands & Kyushu | |
| GONGORA | Cone of OROSI | Costa Rica | |
| GONGORA, CERRO | Dome of RINCON DE LA VIEJA | Costa Rica | |
| GONNARD, PUY | Cone of CHAINE DES PUYS | Western Europe | |
| GONO-IKE | Crater of ON-TAKE | Honshu | |
| GONO-IKE | Crater of NORIKURA | Honshu | |
| GONZALES, ISLOTA | Tuff cone of SAN FELIX | Pacific Ocean (Chilean Islands) | |
| GOOD HOPE ISLAND | Synonym of NIUAFO'OU | Tonga Islands | |
| GOODENOUGH | Volcanic field | Holocene | New Guinea & D'Entrecasteaux Islands |
| GOODHOPE BAY | Tuff cone of MARION ISLAND | Indian Ocean (southern) | |
| GORA CHETIEREK GLAVAIA | Synonym of FOURPEAKED | Alaska Peninsula | |
| GORA EDGKOM | Synonym of EDGECUMBE | Alaska (eastern) | |
| GORDA | Cone of MADERAS | Nicaragua | |
| GORDO DE JUTIAPA, CERRO | Cinder cone of FLORES | Guatemala | |
| GORDO, CERRITO | Cinder cone of CUILAPA-BARBARENA | Guatemala | |
| GORDO, CERRO | Cone of ZITACUARO-VALLE DE BRAVO | México | |
| GORDO, CERRO | Cone of ZITACUARO-VALLE DE BRAVO | México | |
| GORDO, CERRO | Dome of TOLUCA, NEVADO DE | México | |
| GORDO, CERRO | Cinder cone of NAOLINCO VOLCANIC FIELD | México | |
| GORDO, CERRO | Cinder cone of NAOLINCO VOLCANIC FIELD | México | |
| GORDO, CERRO | Dome of CUMBRES, LAS | México | |
| GORDO, CERRO | Cinder cone of MOYUTA | Guatemala | |
| GORDO, VOLCAN | Cone of ZITACUARO-VALLE DE BRAVO | México | |
| GORDON | Cinder cones | Holocene? | Alaska (eastern) |
| GORDON'S HILL | Cone of MARION ISLAND | Indian Ocean (southern) | |
| GORDON'S HILL | Cone of NEWER VOLCANICS PROV | Australia | |
| GORELAIA SOPKA | Synonym of GORELY | Kamchatka Peninsula | |
| GORELAIA SOPKA | Synonym of AVACHINSKY | Kamchatka Peninsula | |
| GORELI | Synonym of SEGUAM | Aleutian Islands | |
| GORELOI | Synonym of REDOUBT | Alaska (southwestern) | |
| GORELY | Cinder cone of KOSHELEV | Kamchatka Peninsula | |
| GORELY | Caldera | Historical | Kamchatka Peninsula |
| GORELY KHREBET (GORELY KUREBET) | Synonym of GORELY | Kamchatka Peninsula | |
| GORGE FARM | Dome of OLKARIA | Africa (eastern) | |
| GORIACHY PLIAZH | Thermal Feature of MENDELEEV | Kuril Islands | |
| GORIASCHAIA SOPKA | Stratovolcano | Historical | Kuril Islands |
| GORIASCHI DOL | Synonym of UZON | Kamchatka Peninsula | |
| GORNA, MONTE | Cinder cone of ETNA | Italy | |
| GORNOE PLATEAU | Dome of UZON | Kamchatka Peninsula | |
| GORNOGO INSTITUTA | Synonym of GORNY INSTITUTE | Kamchatka Peninsula | |
| GORNY INSTITUTE | Stratovolcano | Radiocarbon | Kamchatka Peninsula |
| GORNYI INSTITUTE | Synonym of GORNY INSTITUTE | Kamchatka Peninsula | |
| GOROPU | Synonym of WAIOWA | New Guinea & D'Entrecasteaux Islands | |
| GORRA | Cone of JOLO | Sulu Islands | |
| GORSHKOV | Cone of USHKOVSKY | Kamchatka Peninsula | |
| GORSHOK | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| GORU | Crater of MUNDUA | New Britain | |
| GORUPU | Synonym of WAIOWA | New Guinea & D'Entrecasteaux Islands | |
| GORYACHY | Dome of BOLSHOI SEMIACHIK | Kamchatka Peninsula | |
| GORYASHCHAYA SOPKA | Synonym of GORIASCHAIA SOPKA | Kuril Islands | |
| GORYASHCHIY DOL | Synonym of UZON | Kamchatka Peninsula | |
| GOSEI-DAKE | Synonym of ZAO | Honshu | |
| GOSHIKI-DAKE | Tuff cone of ZAO | Honshu | |
| GOSHIKI-NUMA | Crater of AZUMA | Honshu | |
| GOSHIKI-NUMA [OKAMA] | Crater of ZAO | Honshu | |
| GOSHIKIIWA | Stratovolcano of TOWADA | Honshu | |
| GOSHOGAKE | Thermal Feature of AKITA-YAKE-YAMA | Honshu | |
| GOSIKI-DAKE [GOSHIKI-DAKE] | Tuff cone of ZAO | Honshu | |
| GOSIKI-NUMA [GOSHIKI-NUMA] | Crater of AZUMA | Honshu | |
| GOSLING CONE | Cone of IMURUK LAKE | Alaska (western) | |
| GOSYOGAKE [GOSHOGAKE] | Thermal Feature of AKITA-YAKE-YAMA | Honshu | |
| GOT OJAWA | Cone of HOMA MOUNTAIN | Africa (eastern) | |
| GOT OLOO | Cone of HOMA MOUNTAIN | Africa (eastern) | |
| GOTTERBERG | Synonym of CAMEROON | Africa (western) | |
| GOUDBERG | Synonym of SEULAWAH AGAM | Sumatra | |
| GOUFFRE DUPUIS | Crater of SOUFRIERE GUADELOUPE | West Indies | |
| GOUFFRE TARISSAN | Crater of SOUFRIERE GUADELOUPE | West Indies | |
| GOULES, PUY DE | Cone of CHAINE DES PUYS | Western Europe | |
| GOULIE, PUY DE LA | Cone of CHAINE DES PUYS | Western Europe | |
| GOULVAIN [DOBU] | Stratovolcano of DAWSON STRAIT GROUP | New Guinea & D'Entrecasteaux Islands | |
| GOUTANSAR | Dome of GHEGAM RIDGE | Caucasus, Georgia & Armenia | |
| GOUTTES, PUY DE | Cone of CHAINE DES PUYS | Western Europe | |
| GOVERNMENT GARDENS | Thermal Feature of ROTORUA | New Zealand | |
| GOZYACHAYA SOPKA | Dome of BARKHATNAYA SOPKA | Kamchatka Peninsula | |
| GRAAKULA | Cone of LJOSUFJOLL | Iceland (western) | |
| GRACIOSA | Stratovolcano | Holocene | Azores |
| GRAENAVATN | Maar of KRISUVIK | Iceland (southwestern) | |
| GRAF GOTZEN KRATER | Synonym of NYIRAGONGO | Africa (central) | |
| GRAFELDUR | Crater Row of BRENNISTEINSFJOLL | Iceland (southwestern) | |
| GRAFELLSHRAUN | Crater Row of VATNAFJOLL | Iceland (southern) | |
| GRAHAHRAUN | Fissure vent of BARDARBUNGA | Iceland (northeastern) | |
| GRAHAM BANK [GUILA-FERDINANDEO] | Submarine vent of CAMPI FLEGREI MAR SICILIA | Italy | |
| GRAHAM ISLAND [GIULIA-FERDINANDEO] | Submarine vent of CAMPI FLEGREI MAR SICILIA | Italy | |
| GRAHAM, MT. | Cone of NEWER VOLCANICS PROV | Australia | |
| GRAKOLLUHRAUN | Fissure vent of TORFAJOKULL | Iceland (southern) | |
| GRAMELUR | Crater Row of HENGILL | Iceland (southwestern) | |
| GRAN CANARIA | Fissure vents | Radiocarbon | Canary Islands |
| GRAN CONO | Stratovolcano of VESUVIUS | Italy | |
| GRAN CRATERE | Crater of VULCANO | Italy | |
| GRANADA | Fissure vents | Holocene | Nicaragua |
| GRANADITO | Cinder cone of GRANADA | Nicaragua | |
| GRANBY, MOUNT | Stratovolcano of ST. CATHERINE | West Indies | |
| GRAND BOTOUM | Cone of TOUSSIDE, TARSO | Africa (northern) | |
| GRAND DADOI | Cone of TOUSSIDE, TARSO | Africa (northern) | |
| GRAND ETANG | Crater of ST. CATHERINE | West Indies | |
| GRAND PAYS BRULE | Synonym of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| GRAND SARCOUI | Dome of CHAINE DES PUYS | Western Europe | |
| GRAND SOUFRIERE [VALLEY OF DESOLATION] | Thermal Feature of WATT, MORNE | West Indies | |
| GRAND SUCHET, LE | Cone of CHAINE DES PUYS | Western Europe | |
| GRANDE DE GUIMAR, MONTANA | Cone of TENERIFE | Canary Islands | |
| GRANDE DECOUVERTE, LA | Stratovolcano of SOUFRIERE GUADELOUPE | West Indies | |
| GRANDE LA PIEDAD, CERRO | Shield volcano of MICHOACAN-GUANAJUATO | México | |
| GRANDE MARMITE | Crater of AMSTERDAM ISLAND | Indian Ocean (southern) | |
| GRANDE SOUFRIERE HILLS | Stratovolcano of WATT, MORNE | West Indies | |
| GRANDE, CERRO | Cone of ZITACUARO-VALLE DE BRAVO | México | |
| GRANDE, CERRO | Shield volcano of MICHOACAN-GUANAJUATO | México | |
| GRANDE, CERRO | Dome of PACAYA | Guatemala | |
| GRANDE, CERRO | Dome of COATEPEQUE CALDERA | El Salvador & Honduras | |
| GRANDE, CERRO | Dome of APASTEPEQUE FIELD | El Salvador & Honduras | |
| GRANDE, CERRO | Cone of PILAS, LAS | Nicaragua | |
| GRANDE, CERRO | Tuff cone of ECUADOR | Galápagos Islands | |
| GRANDE, PICO | Cone of PICOS VOLCANIC SYSTEM | Azores | |
| GRANDE, PICO | Synonym of FOGO | Cape Verde Islands | |
| GRANDE, VOLCAN | Stratovolcano of MICHOACAN-GUANAJUATO | México | |
| GRANDE, VOLCAN | Synonym of NEGRA, SIERRA | Galápagos Islands | |
| GRANDES PENTES | Synonym of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| GRANDS BOIS, PITON DES | Cinder cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| GRANGE KOP, LA | Tuff cone of MARION ISLAND | Indian Ocean (southern) | |
| GRANTS MALPAIS | Synonym of ZUNI-BANDERA | USA (New Mexico) | |
| GRASLEYSUFJOLL | Crater Row of VATNAFJOLL | Iceland (southern) | |
| GRASSY | Cinder cone of CRATERS OF THE MOON | USA (Idaho) | |
| GRATI | Maar of TENGGER CALDERA | Java | |
| GRAY | Cone of SEAL NUNATAKS GROUP | Antarctica & South Sandwich Islands | |
| GRAY BUTTE | Dome of SHASTA | USA (California) | |
| GRAZINAS, PICO | Dome of TRINDADE | Atlantic Ocean (central) | |
| GREAT CRACK | Fissure vent of KILAUEA | Hawaiian Islands | |
| GREAT CRATER | Maar of QAL'EH HASAN ALI | Iran & Afghanistan | |
| GREAT DOMBERG HILL | Cone of MERU | Africa (eastern) | |
| GREAT HANISH ISLAND | Shield volcano of HANISH | Africa (northeastern) & Red Sea | |
| GREAT HILL | Dome of SABA | West Indies | |
| GREAT RIFT ZONE | Fissure vent of CRATERS OF THE MOON | USA (Idaho) | |
| GREAT SITCHIN | Synonym of GREAT SITKIN | Aleutian Islands | |
| GREAT SITKIN | Stratovolcano | Historical | Aleutian Islands |
| GREBEN' | Dome of UZON | Kamchatka Peninsula | |
| GRECHISHKINA | Shield volcano of SNEZHNIY | Kamchatka Peninsula | |
| GREEN BUTTE | Cone of NEWBERRY | USA (Oregon) | |
| GREEN HILL | Cone of AUCKLAND FIELD | New Zealand | |
| GREEN ISLAND | Dome of ST. CATHERINE | West Indies | |
| GREEN LAKE PLUG | Dome of OKATAINA | New Zealand | |
| GREEN LAKE PUMICE CRATER | Crater of RAOUL ISLAND | Kermadec Islands | |
| GREENOCK, MT. | Cone of NEWER VOLCANICS PROV | Australia | |
| GRENSDALUR | Cone of HENGILL | Iceland (southwestern) | |
| GREWINGK [CASTLE ROCK] | Former dome of BOGOSLOF | Aleutian Islands | |
| GRIGGS | Stratovolcano | Radiocarbon | Alaska Peninsula |
| GRILLE, LA | Shield volcano | Holocene | Indian Ocean (western) |
| GRIMSNES | Crater rows | Tephrochronology | Iceland (southwestern) |
| GRIMSVOTN | Caldera | Historical | Iceland (northeastern) |
| GRIS | Crater of PUYEHUE-CORDON CAULLE | Central Chile & Argentina | |
| GRIS, CRATER | Cinder cone of MOCHO-CHOSHUENCO | Central Chile & Argentina | |
| GRIZZLY BUTTE | Shield volcano of TUYA VOLCANIC FIELD | Canada | |
| GROPPO | Stratovolcano | Holocene | Africa (northeastern) & Red Sea |
| GROS BENARD, LE | Crater of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| GROS FOUGAS | Cinder cone of SOUFRIERE GUADELOUPE | West Indies | |
| GROS HASAN DAGI | Dome of HASAN DAGI | Turkey | |
| GROS PITON | Cinder cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| GROS PITON | Dome of QUALIBOU | West Indies | |
| GROSSE SSEMJATSCHIK | Synonym of MALY SEMIACHIK | Kamchatka Peninsula | |
| GROTTA DEL CANE | Crater of CAMPI FLEGREI | Italy | |
| GROUND CRATER | Crater of TOKACHI | Hokkaido | |
| GROUNDHOG | Cinder cone of GOLDEN TROUT CREEK | USA (California) | |
| GROUSE HILL | Dome of CRATER LAKE | USA (Oregon) | |
| GROWLER HOT SPRINGS | Thermal Feature of LASSEN VOLCANIC CENTER | USA (California) | |
| GROZNY | Dome of GROZNY GROUP | Kuril Islands | |
| GROZNY GROUP | Complex volcanoes | Historical | Kuril Islands |
| GUA WALED [GUA WALET] | Crater of CEREME | Java | |
| GUA WALET | Crater of CEREME | Java | |
| GUACA, LA | Cone of GALERAS | Colombia | |
| GUACAMAYA, CERRO LA | Cone of ZITACUARO-VALLE DE BRAVO | México | |
| GUACAMAYAS, CERRO DE LAS | Cinder cone of CHINGO | Guatemala | |
| GUACAMAYERO, CERRO | Cinder cone of COATEPEQUE CALDERA | El Salvador & Honduras | |
| GUACAMAYO | Synonym of SUMACO | Ecuador | |
| GUACHA, LOMA | Cinder cone of CRATER BASALT VOLCANIC FIELD | Southern Chile & Argentina | |
| GUACHIPELIN | Pleistocene caldera of RINCON DE LA VIEJA | Costa Rica | |
| GUACO, CERRO EL | Dome of MICHOACAN-GUANAJUATO | México | |
| GUADALUPE | Shield volcano | Holocene | México |
| GUADALUPE, CERRO DE | Cinder cone of SAN VICENTE | El Salvador & Honduras | |
| GUAGUA PICHINCHA | Stratovolcano | Historical | Ecuador |
| GUAGUA SUMACO | Cone of SUMACO | Ecuador | |
| GUAGUA-PUTINA | Synonym of MISTI, EL | Perú | |
| GUAILLANE, CERRO | Stratovolcano of PUCHULDIZA | Northern Chile, Bolivia & Argentina | |
| GUAJARA | Pleistocene caldera of TENERIFE | Canary Islands | |
| GUALLATIRI | Stratovolcano | Historical | Northern Chile, Bolivia & Argentina |
| GUANAQUEROS, VOLCAN | Cinder cone of ATUEL, CALDERA DEL | Central Chile & Argentina | |
| GUANGOCHE, CERRO EL | Dome of AZUFRES, LOS | México | |
| GUANYIN, PITON | Cinder cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| GUARARI | Cinder cone of BARVA | Costa Rica | |
| GUARDA, CERRO EL | Cone of CHICHINAUTZIN | México | |
| GUARDIA, MONTE | Dome of LIPARI | Italy | |
| GUARDIAN, CERRO | Cinder cone of IRAZU | Costa Rica | |
| GUARDIOLA, LA | Cone of ISCHIA | Italy | |
| GUATISEA, MONTANA | Cone of LANZAROTE | Canary Islands | |
| GUATOJON, CERRO | Cinder cone of CHIQUIMULA VOLCANIC FIELD | Guatemala | |
| GUATUSA, LOMA LA | Dome of MOMOTOMBO | Nicaragua | |
| GUATUSOS PEAK | Synonym of ARENAL | Costa Rica | |
| GUAYABAL, EL | Tuff cone of CHICHON, EL | México | |
| GUAYABO | Pleistocene caldera of MIRAVALLES | Costa Rica | |
| GUAYAQUES | Lava domes | Holocene | Northern Chile, Bolivia & Argentina |
| GUAYTA | Synonym of HUAYNAPUTINA | Perú | |
| GUAZAPA | Stratovolcano | Holocene? | El Salvador & Honduras |
| GUBERABIA | Cone of NYIRAGONGO | Africa (central) | |
| GUDDA [BOSET] | Stratovolcano of BOSET-BERICHA | Africa (northeastern) & Red Sea | |
| GUDUACK | Cone of HALLA | Korea | |
| GUEGUENSI, ISLA | Cone of ZACATE GRANDE, ISLA | El Salvador & Honduras | |
| GUEUIE RONDE, PITON | Cinder cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| GUFA | Volcanic field | Holocene | Africa (northeastern) & Red Sea |
| GUGUAN | Stratovolcano | Historical | Izu, Volcano, & Mariana Islands |
| GUIA, MONTE DE | Tuff cone of FAYAL | Azores | |
| GUIANASON, MT | Thermal Feature of BILIRAN | Central Philippines | |
| GUIESHAN (GUISHAN) | Synonym of KUEISHANTAO | Taiwan | |
| GUIJA VOLC FIELD | Synonym of SAN DIEGO | El Salvador & Honduras | |
| GUILHERME MONIZ | Stratovolcano of TERCEIRA | Azores | |
| GUIMAR, VOLCAN DE | Cinder cone of TENERIFE | Canary Islands | |
| GUIMBA | Cinder cone of JOLO | Sulu Islands | |
| GUINDOS, LOS | Stratovolcano of CARRAN-LOS VENADOS | Central Chile & Argentina | |
| GUINEA, LA | Dome of ZAPATERA | Nicaragua | |
| GUINSAYAWAN, MT. | Cone of CUERNOS DE NEGROS | Central Philippines | |
| GUINSILIBAN, MT. [MT. GINSILIBAN] | Stratovolcano of CAMIGUIN | Mindanao | |
| GUINTABON DOME | Dome of CUERNOS DE NEGROS | Central Philippines | |
| GUISO DEL MONTE PANAMAO | Thermal Feature of BILIRAN | Central Philippines | |
| GULIZAR | Crater of TENDUREK DAGI | Turkey | |
| GULLBORG | Cone of LJOSUFJOLL | Iceland (western) | |
| GULU | Cone of LANGILA | New Britain | |
| GUMANSAN | Dome of BILIRAN | Central Philippines | |
| GUMATMALI | Fissure vent of MANDA HARARO | Africa (northeastern) & Red Sea | |
| GUMAWANG | Crater of LAWU | Java | |
| GUMURUH | Crater of GEDE | Java | |
| GUN CREEK | Synonym of BRIDGE RIVER CONES | Canada | |
| GUNEYDAG | Dome of ACIGOL-NEVSEHIR | Turkey | |
| GUNGPO | Synonym of TENGCHONG | Southeast Asia | |
| GUNKAN-YAMA | Dome of NIPESOTSU-MARUYAMA | Hokkaido | |
| GUNNARSHOLTSHRAUN | Fissure vent of HEKLA | Iceland (southern) | |
| GUNTUR | Complex volcano | Historical | Java |
| GUNTUR | Crater of GALUNGGUNG | Java | |
| GUNTURAN | Dome of TENGGER CALDERA | Java | |
| GUNUNG | See proper name (e.g. TARUB, GUNUNG) | Indonesian for MT. | |
| GUNUNG API NORTH OF WETAR | Synonym of GUNUNGAPI WETAR | Banda Sea | |
| GUNUNGAPI | Synonym of AGUNG | Lesser Sunda Islands | |
| GUNUNGAPI | Synonym of IYA | Lesser Sunda Islands | |
| GUNUNGAPI | Synonym of LEWOTOLO | Lesser Sunda Islands | |
| GUNUNGAPI BIMA | Synonym of SANGEANG API | Lesser Sunda Islands | |
| GUNUNGAPI WETAR | Stratovolcano | Historical | Banda Sea |
| GUPIT | Crater of KELUT | Java | |
| GURAUNDO-KAKO [GROUND CRATER] | Crater of TOKACHI | Hokkaido | |
| GUSHAN | Cinder cone of KELUO GROUP | China (eastern) | |
| GUYNEMER, MASSIF | Stratovolcano of KERGUELEN ISLANDS | Indian Ocean (southern) | |
| GUZMANES, LOS | Stratovolcano of TINGUIRIRICA | Central Chile & Argentina | |
| GVENDARHYRAN | Tuya of TORFAJOKULL | Iceland (southern) | |
| GVENDARSELSGIGAR | Crater Row of KRISUVIK | Iceland (southwestern) | |
| GWANGUOA | Cone of KARISIMBI | Africa (central) | |
| GYOJA-NO-IWAYA | Stratovolcano of OSHIMA | Izu, Volcano, & Mariana Islands | |
| GYOKO | Stratovolcano of KUCHINOERABU-JIMA | Ryukyu Islands & Kyushu | |
| GYP | Crater of SUNSET CRATER | USA (Arizona) | |
| HAABUNGA | Cone of GRIMSVOTN | Iceland (northeastern) | |
| HAAHRAUN | Fissure vent of HEKLA | Iceland (southern) | |
| HAAHRAUN | Fissure vent of BARDARBUNGA | Iceland (northeastern) | |
| HABUMINATO | Crater of OSHIMA | Izu, Volcano, & Mariana Islands | |
| HACCHO-RINDO | Vent of IZU-TOBU | Honshu | |
| HACHI-YAMA | Cone of IZU-TOBU | Honshu | |
| HACHI-YAMA | Cinder cone of SHIGA | Honshu | |
| HACHIGAKUBO GROUP | Cone of IZU-TOBU | Honshu | |
| HACHIJO-FUJI | Synonym of HACHIJO-JIMA | Izu, Volcano, & Mariana Islands | |
| HACHIJO-JIMA | Stratovolcanoes | Historical | Izu, Volcano, & Mariana Islands |
| HACHIJO-JIMA NISHI-YAMA | Synonym of HACHIJO-JIMA | Izu, Volcano, & Mariana Islands | |
| HACHIKUBO | Stratovolcano of KUCHINOERABU-JIMA | Ryukyu Islands & Kyushu | |
| HACHIKUBO-YAMA | Cone of IZU-TOBU | Honshu | |
| HACHIMAKI-YAMA | Dome of UNZEN | Ryukyu Islands & Kyushu | |
| HACHIMAN-JIGOKU | Thermal Feature of TSURUMI | Ryukyu Islands & Kyushu | |
| HACHIMAN-YAMA | Cone of HACHIJO-JIMA | Izu, Volcano, & Mariana Islands | |
| HACHIMANTAI | Stratovolcano | Radiocarbon | Honshu |
| HACHINOKUBO | Vent of UNZEN | Ryukyu Islands & Kyushu | |
| HACHIYAMA-HIGASHIOKU | Cone of IZU-TOBU | Honshu | |
| HACHIYO-TAKE | Synonym of FUJI | Honshu | |
| HACIENDA DE JARIDEO GROUP | Thermal Feature of MICHOACAN-GUANAJUATO | México | |
| HACIENDA DEL AGUA FRIA GROUP | Thermal Feature of MICHOACAN-GUANAJUATO | México | |
| HACKAMORE CREEK | Cone of WEST CRATER | USA (Washington) | |
| HADJI, KAWAH [KAWAH HAJI] | Crater of KARANG | Java | |
| HAGAFELL | Shield volcano of KRISUVIK | Iceland (southwestern) | |
| HAGAFELL | Shield volcano of LANGJOKULL | Iceland (southwestern) | |
| HAGAVIKURHRAUN | Fissure vent of HENGILL | Iceland (southwestern) | |
| HAGLEY | Dome of PLAT PAYS, MORNE | West Indies | |
| HAGONGUHRAUN | Fissure vent of BARDARBUNGA | Iceland (northeastern) | |
| HAGOROMO-YAMA | Synonym of FUJI | Honshu | |
| HAGUE | Stratovolcano of EMMONS LAKE | Alaska Peninsula | |
| HAID AL-ISI [JABAL EL-ESI] | Stratovolcano of DHAMAR, HARRAS OF | Arabia | |
| HAID EL-'ARQUB | Cone of SAWAD, HARRA ES- | Arabia | |
| HAID EL-ESI [JABAL EL-ESI] | Stratovolcano of DHAMAR, HARRAS OF | Arabia | |
| HAIMON-DAKE [KAIMON] | Stratovolcano of IBUSUKI VOLCANIC FIELD | Ryukyu Islands & Kyushu | |
| HAIN | Tuff ring of VESTMANNAEYJAR | Iceland (southern) | |
| HAINAN DAO | Pyroclastic cones | Historical | Southeast Asia |
| HAININI | Dome of OKATAINA | New Zealand | |
| HAINOA CRATER | Crater of HUALALAI | Hawaiian Islands | |
| HAIQUE | Cone of ANTILLANCA GROUP | Central Chile & Argentina | |
| HAIWAHINE, PUU | Cone of MAUNA KEA | Hawaiian Islands | |
| HAJI, KAWAH | Crater of KARANG | Java | |
| HAKKA | Stratovolcano of TOWADA | Honshu | |
| HAKKEN-YAMA | Cone of FUJI | Honshu | |
| HAKKODA GROUP | Stratovolcanoes | Radiocarbon | Honshu |
| HAKKODA-ODAKE | Stratovolcano of HAKKODA GROUP | Honshu | |
| HAKONE | Complex volcano | Radiocarbon | Honshu |
| HAKU-SAN | Stratovolcano | Historical | Honshu |
| HAKUDAIRYUO | Cone of FUJI | Honshu | |
| HAKUEN (HAKUEN-ZAN) | Synonym of KARPINSKY GROUP | Kuril Islands | |
| HAKUTO | Synonym of CHANGBAISHAN | China (eastern) | |
| HAKUUN-DAKE | Dome of DAISETSU | Hokkaido | |
| HAKUUN-ZAN | Dome of SHIKARIBETSU GROUP | Hokkaido | |
| HALA- | See proper name (e.g. ASI, HALA-L) | Arabic for VOLCANIC CONE | |
| HALALII | Cone of HALEAKALA | Hawaiian Islands | |
| HALEAKALA | Shield volcano | Anthropology | Hawaiian Islands |
| HALEKAMAHINA | Cone of KILAUEA | Hawaiian Islands | |
| HALEMAUMAU | Pit crater of KILAUEA | Hawaiian Islands | |
| HALEPA | Dome of MILOS | Greece | |
| HALEYJABUNGA | Shield volcano of REYKJANES | Iceland (southwestern) | |
| HALF CONE | Tuff cone of PRINCE EDWARD ISLAND | Indian Ocean (southern) | |
| HALF CONE | Cone of ANIAKCHAK | Alaska Peninsula | |
| HALF CONE | Cone of CRATERS OF THE MOON | USA (Idaho) | |
| HALL BUTTE | Cinder cone of TUMBLE BUTTES | USA (California) | |
| HALLA | Shield volcano | Historical | Korea |
| HALLMUNDARHRAUN | Shield volcano of LANGJOKULL | Iceland (southwestern) | |
| HALSAGIGIR | Fissure vent of GRIMSVOTN | Iceland (northeastern) | |
| HALYKI | Thermal Feature of MILOS | Greece | |
| HAMARINN | Stratovolcano of LOKI-FOGRUFJOLL | Iceland (northeastern) | |
| HAMATANG | Cinder cone of JINGBO | China (eastern) | |
| HAMBARIANA | Cone of GHEGAM RIDGE | Caucasus, Georgia & Armenia | |
| HAMILTON, MT. | Cone of NEWER VOLCANICS PROV | Australia | |
| HAMMA AL-HAMDANI [JABAL EL-ESI] | Stratovolcano of DHAMAR, HARRAS OF | Arabia | |
| HAMMAM EL-ZEBIB | Thermal Feature of DHAMAR, HARRAS OF | Arabia | |
| HAMMAN ALESSI, DJEBEL [JABAL EL-ESI] | Stratovolcano of DHAMAR, HARRAS OF | Arabia | |
| HAMMAT ES-SA'TAR | Cone of DHAMAR, HARRAS OF | Arabia | |
| HAMNER BUTTE | Shield volcano of DAVIS LAKE | USA (Oregon) | |
| HAMRAGARDARHRAUN | Fissure vent of EYJAFJOLL | Iceland (southern) | |
| HAMUDI, JABAL AL | Stratovolcano of ARHAB, HARRA OF | Arabia | |
| HAMUGOMA | Tuff cone of FORT PORTAL | Africa (central) | |
| HANA RIDGE | Fissure vent of HALEAKALA | Hawaiian Islands | |
| HANARE-YAMA | Dome of ASAMA | Honshu | |
| HANATATE | Dome of KOZU-SHIMA | Izu, Volcano, & Mariana Islands | |
| HANDO-IWA | Vent of UNZEN | Ryukyu Islands & Kyushu | |
| HANGA O TEA | Crater of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| HANGAR | Synonym of KHANGAR | Kamchatka Peninsula | |
| HANGAYN VOLC FIELD | Synonym of TARYATU-CHULUTU | Mongolia | |
| HANGELBERG | Cone of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| HANGING ROCK | Dome of NEWER VOLCANICS PROV | Australia | |
| HANGURA [KHANGURA] | Cone of UDOKAN PLATEAU | Russia (southeastern) | |
| HANI-HANI | Pyroclastic Cone of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| HANISH | Shield volcano | Holocene | Africa (northeastern) & Red Sea |
| HANJALE, GOF | Maar of MARSABIT | Africa (eastern) | |
| HANKOW REEF | Synonym of YOMBA | Northeast of New Guinea | |
| HANNAH, MT. | Dome of CLEAR LAKE | USA (California) | |
| HANNINGTON | Synonym of BOGORIA | Africa (eastern) | |
| HANS MEYER CRATER [MUNTANGO] | Pit crater of KARISIMBI | Africa (central) | |
| HANSA ISLAND | Synonym of MANAM | Northeast of New Guinea | |
| HANTSONGOMA | Crater of KARTHALA | Indian Ocean (western) | |
| HANUI (HANUY) GOL | Synonym of KHANUY GOL | Mongolia | |
| HAO, MAUNGA [MAUNGA VAO] | Pyroclastic Cone of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| HAOFA | Tuff cone of WALLIS ISLANDS | Samoan & Wallis Islands | |
| HAOLDUHRAUN | Fissure vent of HOFSJOKULL | Iceland (southwestern) | |
| HAOLDUHRAUN | Fissure vent of TORFAJOKULL | Iceland (southern) | |
| HAPBERG [KAPBERG] | Stratovolcano of LOLO | New Britain | |
| HARAI | Cinder cone of IZU-TOBU | Honshu | |
| HARAI | Cinder cone of IZU-TOBU | Honshu | |
| HARAKANDI | Cone of NYAMURAGIRA | Africa (central) | |
| HARANGGAOL | Caldera of TOBA | Sumatra | |
| HARARO MANDA | Synonym of MANDA HARARO | Africa (northeastern) & Red Sea | |
| HARARU | Synonym of MANDA HARARO | Africa (northeastern) & Red Sea | |
| HARDIN BUTTE | Cone of MEDICINE LAKE | USA (California) | |
| HARDT-MAAR | Maar of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| HARGY | Stratovolcano | Radiocarbon | New Britain |
| HARIMKOTAN | Synonym of KHARIMKOTAN | Kuril Islands | |
| HARO MAJA | Tuff ring of BISHOFTU VOLCANIC FIELD | Africa (northeastern) & Red Sea | |
| HARO MAJA | Maar of BUTAJIRI-SILTI FIELD | Africa (northeastern) & Red Sea | |
| HAROHARO | Fissure vent of OKATAINA | New Zealand | |
| HAROSU | Synonym of BAYONNAISE ROCKS | Izu, Volcano, & Mariana Islands | |
| HAROTSIATSIANOPORI | Synonym of RASSHUA | Kuril Islands | |
| HAROUDJ, DJEBEL | Synonym of HARUJ | Africa (northern) | |
| HARRA / HARRAS | See proper name (e.g. DHAMAR, HARRAS OF) | Arabic for LAVA FIELD | |
| HARRAH, AL | Volcanic field | Holocene | Arabia |
| HARRAT / HARRET | See proper name (e.g. ER-RAHA, HARRAT) | Arabic for LAVA FIELD | |
| HARRY'S SPA HOT SPRINGS | Thermal Feature of ST. HELENS | USA (Washington) | |
| HARUJ | Volcanic field | Holocene | Africa (northern) |
| HARUMUKOTAN | Synonym of KHARIMKOTAN | Kuril Islands | |
| HARUNA | Stratovolcano | Anthropology | Honshu |
| HARUNA-FUJI | Cone of HARUNA | Honshu | |
| HARUTA-YAMA | Dome of SAKURA-JIMA | Ryukyu Islands & Kyushu | |
| HASAN DAGI | Stratovolcano | Anthropology | Turkey |
| HASAN DAGI | Cone of ERCIYES DAGI | Turkey | |
| HASZARD, MT. | Cone of MACAULEY ISLAND | Kermadec Islands | |
| HAT MOUNTAIN | Cone of LASSEN VOLCANIC CENTER | USA (California) | |
| HATACHI-YAMA | Synonym of FUJI | Honshu | |
| HATCHOBARU | Thermal Feature of KUJU | Ryukyu Islands & Kyushu | |
| HATCHODAIRA | Caldera of MIYAKE-JIMA | Izu, Volcano, & Mariana Islands | |
| HATENJI | Cone of NGOZI | Africa (eastern) | |
| HATI-YAMA [HACHI-YAMA] | Cinder cone of SHIGA | Honshu | |
| HATIMAKI-YAMA [HACHIMAKI-YAMA] | Dome of UNZEN | Ryukyu Islands & Kyushu | |
| HATIMANTAI | Synonym of HACHIMANTAI | Honshu | |
| HATIZYO-HUZI | Synonym of HACHIJO-JIMA | Izu, Volcano, & Mariana Islands | |
| HATIZYO-ZIMA NISI-YAMA | Synonym of HACHIJO-JIMA | Izu, Volcano, & Mariana Islands | |
| HATTAB, JABAL [KAULET HATTAB] | Tuff cone of ARHAB, HARRA OF | Arabia | |
| HATTUR | Fissure vent of BARDARBUNGA | Iceland (northeastern) | |
| HA'U EPA, MAUNGA | Pyroclastic Cone of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| HAUG, CRATERE | Crater of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| HAUGUR | Crater Row of REYKJANES | Iceland (southwestern) | |
| HAUHUNGATAHI | Cone of RUAPEHU | New Zealand | |
| HAUKADALUR | Thermal Feature of LANGJOKULL | Iceland (southwestern) | |
| HAUT DONG NAI | Volcanic field | Holocene? | Southeast Asia |
| HAUY, PITON | Cinder cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| HAVFUEN PEAK | Cone of BRISTOL ISLAND | Antarctica & South Sandwich Islands | |
| HAWSHUENSHAN [MAANSHAN] | Cinder cone of TENGCHONG | Southeast Asia | |
| HAYCOCK ISLAND | Cone of HANISH | Africa (northeastern) & Red Sea | |
| HAYCOCK ISLAND | Cone of ZUBAIR, JEBEL | Africa (northeastern) & Red Sea | |
| HAYES | Stratovolcano | Radiocarbon | Alaska (southwestern) |
| HAYIL, HARRAT | Synonym of BIRK, HARRAT AL | Arabia | |
| HAYIL, JIBAL | Cone of BIRK, HARRAT AL | Arabia | |
| HAYLAH, JABAL AL | Cone of BIRK, HARRAT AL | Arabia | |
| HAYLAN, JABAL | Volcanic field | Anthropology | Arabia |
| HAYLI GUB | Synonym of HAYLI GUBBI | Africa (northeastern) & Red Sea | |
| HAYLI GUBBI | Shield volcano | Holocene | Africa (northeastern) & Red Sea |
| HAZAM KHADRA', JABAL | Cone of ITHNAYN, HARRAT | Arabia | |
| HEALY | Submarine volcano | Radiocarbon | New Zealand |
| HEARD | Stratovolcano | Historical | Indian Ocean (southern) |
| HEART LAKE | Thermal Feature of YELLOWSTONE | USA (Wyoming) | |
| HEART OF ALAID [SERDTZE ALAIDA] | Dome of KURILE LAKE | Kamchatka Peninsula | |
| HEART PEAKS | Shield volcano | Holocene? | Canada |
| HEBERT | Cone of AMSTERDAM ISLAND | Indian Ocean (southern) | |
| HEHU | Cone of KARISIMBI | Africa (central) | |
| HEIDARSPORDUR | Fissure vent of KRAFLA | Iceland (northeastern) | |
| HEIDIN HA | Shield volcano of BRENNISTEINSFJOLL | Iceland (southwestern) | |
| HEIENLIGLAR [MARUMLIGLAR] | Crater of AMBRYM | Vanuatu | |
| HEIGUOTOU | Cone of UNNAMED | China (western) | |
| HEIHEIAHULU | Shield volcano of KILAUEA | Hawaiian Islands | |
| HEIJI-DAKE | Stratovolcano of KUJU | Ryukyu Islands & Kyushu | |
| HEIKONGSHAN | Cone of TENGCHONG | Southeast Asia | |
| HEIKONGSHAN | Cone of TENGCHONG | Southeast Asia | |
| HEILONG SHAN | Cinder cone of KUNLUN VOLCANIC GROUP | China (western) | |
| HEIMAEY | Cinder cone of VESTMANNAEYJAR | Iceland (southern) | |
| HEISHAN | Cone of TENGCHONG | Southeast Asia | |
| HEISHAN | Cinder cone of KELUO GROUP | China (eastern) | |
| HEISHIBEIHU | Cinder cone of KUNLUN VOLCANIC GROUP | China (western) | |
| HEIZI-DAKE [HEIJI-DAKE] | Stratovolcano of KUJU | Ryukyu Islands & Kyushu | |
| HEJO, KAWAH | Thermal Feature of GALUNGGUNG | Java | |
| HEKLA | Stratovolcano | Historical | Iceland (southern) |
| HEKLUFELL (HEKLUFJALL) | Synonym of HEKLA | Iceland (southern) | |
| HEKLUGJA | Fissure vent of HEKLA | Iceland (southern) | |
| HELATOBA-TAROETOENG | Synonym of HELATOBA-TARUTUNG | Sumatra | |
| HELATOBA-TARUTUNG | Fumarole field | Pleistocene-Fumarolic | Sumatra |
| HELECHOS, LOS | Cone of LANZAROTE | Canary Islands | |
| HELEMOLLE, VOLCAN | Cone of CABURGUA-HUELEMOLLE | Central Chile & Argentina | |
| HELEN, MOUNT | Dome of LASSEN VOLCANIC CENTER | USA (California) | |
| HELENA | Cone of CAMEROON | Africa (western) | |
| HELGADALSHRAUN | Crater Row of BRENNISTEINSFJOLL | Iceland (southwestern) | |
| HELGAFELL | Cinder cone of VESTMANNAEYJAR | Iceland (southern) | |
| HELGAFELLSGIGIR | Crater Row of KRISUVIK | Iceland (southwestern) | |
| HELLISEY | Cone of VESTMANNAEYJAR | Iceland (southern) | |
| HELLISKVISLARHRAUN | Fissure vent of HEKLA | Iceland (southern) | |
| HELL'S GATE | Thermal Feature of ROTORUA | New Zealand | |
| HELL'S GATE | Thermal Feature of SURETAMATAI | Vanuatu | |
| HELL'S HALF ACRE | Shield volcano | Radiocarbon | USA (Idaho) |
| HELMET PEAK | Cone of MILBANKE SOUND GROUP | Canada | |
| HELTAGI | Cone of ASSAB VOLCANIC FIELD | Africa (northeastern) & Red Sea | |
| HELVELLYN | Dome of ST. CATHERINE | West Indies | |
| HELVITI [VITI] | Maar of KRAFLA | Iceland (northeastern) | |
| HEMBE | Cone of NYAMURAGIRA | Africa (central) | |
| HENDRIK FISHER KOP | Cinder cone of MARION ISLAND | Indian Ocean (southern) | |
| HENEDURA, LA | Crater of ANTUCO | Central Chile & Argentina | |
| HENEOWARA | Crater of DUKONO | Halmahera | |
| HENGILL | Crater rows | Historical | Iceland (southwestern) |
| HENGSTWEILER | Maar of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| HENRI RALLIER DU BATY, MONT | Cone of KERGUELEN ISLANDS | Indian Ocean (southern) | |
| HENRIE KNOLLS | Cone of MARKAGUNT PLATEAU | USA (Utah) | |
| HENRYS FORK | Pleistocene caldera of YELLOWSTONE | USA (Wyoming) | |
| HERAI-DAKE | Stratovolcano of TOWADA | Honshu | |
| HERALD ISLETS | Crater of RAOUL ISLAND | Kermadec Islands | |
| HERBERT | Stratovolcano | Holocene | Aleutian Islands |
| HERDISARVIKURHRAUN | Shield volcano of BRENNISTEINSFJOLL | Iceland (southwestern) | |
| HERDUBREIDARTAGLAGJOSKA | Crater of ASKJA | Iceland (northeastern) | |
| HERIVDEROS, LOS | Thermal Feature of TENORIO | Costa Rica | |
| HERMOSO, VALLE | Cinder cone of PLATANAR | Costa Rica | |
| HERRADURA | Cone of CHICHINAUTZIN | México | |
| HERRADURA, CERRO LA | Cinder cone of ZITACUARO-VALLE DE BRAVO | México | |
| HERRERA, CRATER | Dome of BARCENA | México | |
| HERTALE | Synonym of ERTA ALE | Africa (northeastern) & Red Sea | |
| HERTALI | Fissure vent | Holocene | Africa (northeastern) & Red Sea |
| HERTHA | Cone of SEAL NUNATAKS GROUP | Antarctica & South Sandwich Islands | |
| HERVIDEROS | See proper name (e.g. SAN JACINTO, HERVIDEROS DE) | Spanish for HOT SPRINGS | |
| HERZ | Cone of USHKOVSKY | Kamchatka Peninsula | |
| HESTOLDUHRAUN | Fissure vent of HEKLA | Iceland (southern) | |
| HFEALIN | Synonym of ICHINSKY | Kamchatka Peninsula | |
| HIBOK-HIBOK | Stratovolcano of CAMIGUIN | Mindanao | |
| HIBRAN, JABAL | Crater of ITHNAYN, HARRAT | Arabia | |
| HIERRO | Shield volcano | Radiocarbon | Canary Islands |
| HIGASHI-AZUMA | Cone of AZUMA | Honshu | |
| HIGASHI-CHOKAI | Stratovolcano of CHOKAI | Honshu | |
| HIGASHI-DAITEN | Cone of AZUMA | Honshu | |
| HIGASHI-DAKE | Cone of AKAN | Hokkaido | |
| HIGASHI-HAKUUNZAN | Cone of HACHIJO-JIMA | Izu, Volcano, & Mariana Islands | |
| HIGASHI-IWATE | Stratovolcano of IWATE | Honshu | |
| HIGASHI-IZU VOLCANO GROUP | Synonym of IZU-TOBU | Honshu | |
| HIGASHI-IZU-OKI GROUP | Synonym of IZU-TOBU | Honshu | |
| HIGASHI-KAITOKUBA | Cone of KAITOKU SEAMOUNT | Izu, Volcano, & Mariana Islands | |
| HIGASHI-KURIKOMA | Stratovolcano of KURIKOMA | Honshu | |
| HIGASHI-MARUYAMA | Dome of USU | Hokkaido | |
| HIGASHI-NUPUKAUSHINUPURI | Dome of SHIKARIBETSU GROUP | Hokkaido | |
| HIGASHI-OIKE | Maar of IZU-TOBU | Honshu | |
| HIGASHI-ONSEN | Thermal Feature of TSURUMI | Ryukyu Islands & Kyushu | |
| HIGASHI-TOKACHI-MARUYAMA [MARU-YAMA] | Dome of NIPESOTSU-MARUYAMA | Hokkaido | |
| HIGASHI-TSURUGI | Cone of FUJI | Honshu | |
| HIGASHI-USUZUKA | Cone of FUJI | Honshu | |
| HIGASHI-YAMA | Stratovolcano of HACHIJO-JIMA | Izu, Volcano, & Mariana Islands | |
| HIGASHI-YAMA | Stratovolcano of OSHIMA-OSHIMA | Hokkaido | |
| HIGASHIMINE | Cone of YOKOATE-JIMA | Ryukyu Islands & Kyushu | |
| HIGASI-DAKE [HIGASHI-DAKE] | Cone of AKAN | Hokkaido | |
| HIGASI-YAMA [HIGASHI-YAMA] | Stratovolcano of HACHIJO-JIMA | Izu, Volcano, & Mariana Islands | |
| HIGATURU | Synonym of LAMINGTON | New Guinea & D'Entrecasteaux Islands | |
| HIGH HOLE CRATER | Crater of MEDICINE LAKE | USA (California) | |
| HIGH ISLAND | Cone of ZUKUR | Africa (northeastern) & Red Sea | |
| HIGH RISE | Thermal Feature of ENDEAVOUR RIDGE | Pacific Ocean (northern) | |
| HIGH TUYA LAKE VOLC FIELD | Volcanic field of TUYA VOLCANIC FIELD | Canada | |
| HIIAKA | Pit crater of KILAUEA | Hawaiian Islands | |
| HIJANG | Synonym of IYANG-ARGAPURA | Java | |
| HIJIORI | Caldera | Holocene | Honshu |
| HIJIRI-YU | Thermal Feature of TSURUMI | Ryukyu Islands & Kyushu | |
| HIJO DEL CUAUHTZIN | Cinder cone of CHICHINAUTZIN | México | |
| HIJO DEL VOLCAN [SANTIAGUITO] | Dome of SANTA MARIA | Guatemala | |
| HIKINOHIRA | Dome of SAKURA-JIMA | Ryukyu Islands & Kyushu | |
| HIKUBO | Crater of OSHIMA | Izu, Volcano, & Mariana Islands | |
| HIKUTEMOTU | Cone of NIUAFO'OU | Tonga Islands | |
| HIL, JABAL | Cinder cone of KISHB, HARRAT | Arabia | |
| HILAS, CERRO DE LAS | Cinder cone of MOYUTA | Guatemala | |
| HILDARHRAUN | Shield volcano of HENGILL | Iceland (southwestern) | |
| HILL 404 | Cinder cone of ST. PAUL ISLAND | Alaska (western) | |
| HILL PIECE | Tuff cone of TRISTAN DA CUNHA | Atlantic Ocean (southern) | |
| HILLA ETHNAN | Synonym of ITHNAYN, HARRAT | Arabia | |
| HILLMAN PEAK | Stratovolcano of CRATER LAKE | USA (Oregon) | |
| HIMAICAGAN [KASIBOI] | Cone of MAHAGNAO | Central Philippines | |
| HIMALAYA, CERRO | Dome of APANECA RANGE | El Salvador & Honduras | |
| HIMO | Cone of KILIMANJARO | Africa (eastern) | |
| HINAMORI-DAKE | Stratovolcano of KIRISHIMA | Ryukyu Islands & Kyushu | |
| HINEMOA POINT | Dome of ROTORUA | New Zealand | |
| HINKELSMAAR | Maar of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| HINO-TAKE | Cone of FUKUE-JIMA | Ryukyu Islands & Kyushu | |
| HINOKIZUKA | Cone of FUJI | Honshu | |
| HINOYAMA-TOGE | Fissure vent of MIYAKE-JIMA | Izu, Volcano, & Mariana Islands | |
| HIPAUA | Thermal Feature of TAUPO | New Zealand | |
| HIPPERSBACH | Tuff ring of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| HIPPO BUTTE | Cone of MEDICINE LAKE | USA (California) | |
| HIRABE-YAMA | Crater of MIYAKE-JIMA | Izu, Volcano, & Mariana Islands | |
| HIRAKIKI-DAKE [KAIMON] | Stratovolcano of IBUSUKI VOLCANIC FIELD | Ryukyu Islands & Kyushu | |
| HIRASE | Cone of SAKURA-JIMA | Ryukyu Islands & Kyushu | |
| HIRATSUKA | Cone of FUJI | Honshu | |
| HIRI | Stratovolcano | Holocene | Halmahera |
| HIRO | Synonym of ILIWERUNG | Lesser Sunda Islands | |
| HIROYIYAMA-OYUNUMA-URAJIGOKU | Fissure vent of KUTTARA | Hokkaido | |
| HIRUP, KAWAH | Thermal Feature of SALAK | Java | |
| HISAGO-GATA | Crater of KOMAGA-TAKE | Hokkaido | |
| HITIM | Stratovolcano of KABA | Sumatra | |
| HITOKAPPU VOLCANO GROUP | Synonym of BOGATYR RIDGE | Kuril Islands | |
| HITOKAPPU-YAMA | Stratovolcano of BOGATYR RIDGE | Kuril Islands | |
| HIUCHI | Stratovolcano | Historical | Honshu |
| HIUCHIGA-TAKE | Synonym of HIUCHI | Honshu | |
| HIUKAU, PUU | Cone of MAUNA KEA | Hawaiian Islands | |
| HIVA HIVA, MAUNGA | Pyroclastic Cone of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| HIWAISH ABU SIBA | Cone of BAYUDA VOLCANIC FIELD | Africa (northern) | |
| HIYANG | Synonym of IYANG-ARGAPURA | Java | |
| HIYORI-YAMA | Dome of KUTTARA | Hokkaido | |
| HIYOSHI-OKINOBA | Synonym of MINAMI-HIYOSHI | Izu, Volcano, & Mariana Islands | |
| HIYOSI-OKINOBA | Synonym of MINAMI-HIYOSHI | Izu, Volcano, & Mariana Islands | |
| HIZENGAJO | Dome of KUJU | Ryukyu Islands & Kyushu | |
| HIZIORI | Synonym of HIJIORI | Honshu | |
| HLASCAR | Synonym of LASCAR | Northern Chile, Bolivia & Argentina | |
| HLIDARGIGAR | Fissure vent of HEKLA | Iceland (southern) | |
| HLIDARHRAUN | Shield volcano of BRENNISTEINSFJOLL | Iceland (southwestern) | |
| HLIDARSEL [DALFJALL] | Fissure vent of KRAFLA | Iceland (northeastern) | |
| HNAPPAFELLSJOKULL | Synonym of ORAEFAJOKULL | Iceland (southeastern) | |
| HNAUSAGIGAROD | Fissure vent of BARDARBUNGA | Iceland (northeastern) | |
| HNAUSAPOLLUR | Crater of BARDARBUNGA | Iceland (northeastern) | |
| HOASHEN | Synonym of ICHINSKY | Kamchatka Peninsula | |
| HOBICHA CALDERA | Caldera | Holocene? | Africa (northeastern) & Red Sea |
| HOBLEY VOLCANO | Synonym of OLKARIA | Africa (eastern) | |
| HOBSON, MT. | Cone of AUCKLAND FIELD | New Zealand | |
| HOCHAN [PECHAN] | Cone of TIANSHAN VOLCANIC GROUP | China (western) | |
| HOCHSETTER | Cone of JAN MAYEN | Atlantic Ocean (Jan Mayen) | |
| HODGSON NUNATAK | Cone of HUDSON MOUNTAINS | Antarctica & South Sandwich Islands | |
| HODO | Dome of HALLA | Korea | |
| HODSON | Stratovolcano | Holocene | Antarctica & South Sandwich Islands |
| HOEDBERG | Cone of PRINCE EDWARD ISLAND | Indian Ocean (southern) | |
| HOEFDHAJOKULL | Synonym of KATLA | Iceland (southern) | |
| HOEI CRATERS | Crater of FUJI | Honshu | |
| HOELOEBELOE | Synonym of HULUBELU | Sumatra | |
| HOFDAHRAUN | Fissure vent of EYJAFJOLL | Iceland (southern) | |
| HOFDARHRAUN | Crater Row of KRISUVIK | Iceland (southwestern) | |
| HOFENFELS | Maar of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| HOFFMAN, MT. | Dome of MEDICINE LAKE | USA (California) | |
| HOFSFJALL | Cone of ORAEFAJOKULL | Iceland (southeastern) | |
| HOFSJOKULL | Subglacial volcano | Holocene | Iceland (southwestern) |
| HOG KILLER | Thermal Feature of KANLAON | Central Philippines | |
| HOHEN LIST | Maar of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| HOHENLOHOE | Cone of JAN MAYEN | Atlantic Ocean (Jan Mayen) | |
| HOHNEL ISLAND | Synonym of SOUTH ISLAND | Africa (eastern) | |
| HOHONU, LUA | Pit crater of MAUNA LOA | Hawaiian Islands | |
| HOKIBARA-HIGASHI | Maar of IZU-TOBU | Honshu | |
| HOKKAIDO-KOMAGATAKE | Synonym of KOMAGA-TAKE | Hokkaido | |
| HOKUCHIN-DAKE | Dome of DAISETSU | Hokkaido | |
| HOKUTIN-DAKE [HOKUCHIN-DAKE] | Dome of DAISETSU | Hokkaido | |
| HOLAHOLAR | Cone of SNAEFELLSJOKULL | Iceland (western) | |
| HOLANDESA, VOLCAN LA | Cone of TOLGUACA | Central Chile & Argentina | |
| HOLANDESA, VOLCAN LA | Cinder cone of LONQUIMAY | Central Chile & Argentina | |
| HOLANTINDUR | Cone of SNAEFELLSJOKULL | Iceland (western) | |
| HOLLOWBACK, MT. | Cone of NEWER VOLCANICS PROV | Australia | |
| HOLM | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| HOLMSHRAUN | Crater Row of BRENNISTEINSFJOLL | Iceland (southwestern) | |
| HOLOTEPEC, VOLCAN | Cinder cone of CHICHINAUTZIN | México | |
| HOLSELDAR | Crater Row of KRAFLA | Iceland (northeastern) | |
| HOLTE CREEK | Cinder cone of SATAH MOUNTAIN | Canada | |
| HOLUHRAUN | Crater Row of ASKJA | Iceland (northeastern) | |
| HOLZMAAR | Maar of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| HOMA MOUNTAIN | Complex volcano | Holocene | Africa (eastern) |
| HOMAHAN, MT. | Cone of BULUSAN | Luzon | |
| HOMBRE MUERTO, MONTANA DEL | Cinder cone of HIERRO | Canary Islands | |
| HOME REEF | Submarine volcano | Historical | Tonga Islands |
| HONDO, CALDERON | Cinder cone of FUERTEVENTURA | Canary Islands | |
| HONDURA | Stratovolcano of BARVA | Costa Rica | |
| HONGGEERTU | Cinder cones | Holocene? | China (eastern) |
| HONOKAHUA | Cone of HALEAKALA | Hawaiian Islands | |
| HONOR, MT. | Cone of TODOKO-RANU | Halmahera | |
| HONTANIGAWA-SHIRYU | Vent of IZU-TOBU | Honshu | |
| HONTSUKA | Cone of ASO | Ryukyu Islands & Kyushu | |
| HOOD | Stratovolcano | Historical | USA (Oregon) |
| HOODOO MOUNTAIN | Subglacial volcano | Tephrochronology | Canada |
| HOOKOMO, PUU | Cone of MAUNA KEA | Hawaiian Islands | |
| HOOPER CRAGS | Cone of ROYAL SOCIETY RANGE | Antarctica & South Sandwich Islands | |
| HOOPERS SHOULDER | Cone of EREBUS | Antarctica & South Sandwich Islands | |
| HOPUA | Tuff ring of AUCKLAND FIELD | New Zealand | |
| HORA ARSEDI HAYK | Tuff ring of BISHOFTU VOLCANIC FIELD | Africa (northeastern) & Red Sea | |
| HORARO HAYK | Tuff ring of BISHOFTU VOLCANIC FIELD | Africa (northeastern) & Red Sea | |
| HORCONES, CERRO DE | Cone of SUCHITAN | Guatemala | |
| HORNILLAS, LAS | Thermal Feature of MIRAVALLES | Costa Rica | |
| HORNITOS, LOS | Cone of AZUL, CERRO | Central Chile & Argentina | |
| HORNITOS, LOS | Fissure vent of TENERIFE | Canary Islands | |
| HORNOPIREN | Stratovolcano | Holocene | Southern Chile & Argentina |
| HOROG [KHOROG] | Cinder cone of TARYATU-CHULUTU | Mongolia | |
| HOROKA | Thermal Feature of NIPESOTSU-MARUYAMA | Hokkaido | |
| HOROMATANGI REEF | Vent of TAUPO | New Zealand | |
| HOROSSADAL [HROSSADALIUR] | Crater Row of KRAFLA | Iceland (northeastern) | |
| HORQUETA, CERRO | Cone of CHACHANI, NEVADO | Perú | |
| HORSE BUTTE | Cone of NEWBERRY | USA (Oregon) | |
| HORSESHOE CONE | Cinder cone of JEFFERSON | USA (Oregon) | |
| HORSESHOE ISLAND | Dome of KATMAI | Alaska Peninsula | |
| HOSH ED DALAN | Crater of BAYUDA VOLCANIC FIELD | Africa (northern) | |
| HOSH ES SIDDIG | Crater of BAYUDA VOLCANIC FIELD | Africa (northern) | |
| HOSH UMM ARAYSH, JEBEL | Cone of BAYUDA VOLCANIC FIELD | Africa (northern) | |
| HOSHO-ZAN | Dome of KUJU | Ryukyu Islands & Kyushu | |
| HOSYO-ZAN [HOSHO-ZAN] | Dome of KUJU | Ryukyu Islands & Kyushu | |
| HOT CREEK | Thermal Feature of LONG VALLEY | USA (California) | |
| HOT LAGOON | Thermal Feature of SIMBO | Bougainville & Solomon Islands | |
| HOT SPRINGS BAY | Thermal Feature of AKUTAN | Aleutian Islands | |
| HOT SPRINGS CONE | Thermal Feature of OKMOK | Aleutian Islands | |
| HOT SPRINGS COVE | Thermal Feature of RECHESCHNOI | Aleutian Islands | |
| HOTCHEOU | Synonym of TURFAN | China (western) | |
| HOTHAM [GIULIA-FERDINANDEO] | Submarine vent of CAMPI FLEGREI MAR SICILIA | Italy | |
| HOTOKEIWA | Shield volcano of ASAMA | Honshu | |
| HOTTA | Thermal Feature of TSURUMI | Ryukyu Islands & Kyushu | |
| HOU, LUA | Pit crater of MAUNA LOA | Hawaiian Islands | |
| HOYA DE CINTORA | Maar of MICHOACAN-GUANAJUATO | México | |
| HOYA DE FILEBA | Crater of HIERRO | Canary Islands | |
| HOYA, LA | Crater of SAN CRISTOBAL | Nicaragua | |
| HOYADA DE LOS GEISERS DEL TATIO | Synonym of TATIO, EL | Northern Chile, Bolivia & Argentina | |
| HOYADA, LA | Crater of SAN CRISTOBAL | Nicaragua | |
| HOYBERG | Cone of JAN MAYEN | Atlantic Ocean (Jan Mayen) | |
| HOYO CEDRO | Crater of TENERIFE | Canary Islands | |
| HOYO DE CALDERAS | Crater of APASTEPEQUE FIELD | El Salvador & Honduras | |
| HOYO DE CIBOLA | Vent of ZUNI-BANDERA | USA (New Mexico) | |
| HOYO DE CUAJUSTE | Crater of APANECA RANGE | El Salvador & Honduras | |
| HOYO EL HUANILLO | Cinder cone of MICHOACAN-GUANAJUATO | México | |
| HOYO NEGRO | Crater of LA PALMA | Canary Islands | |
| HOYO, CERRO EL | Cinder cone of NAOLINCO VOLCANIC FIELD | México | |
| HOYO, CERRO EL | Cinder cone of YOJOA, LAKE | El Salvador & Honduras | |
| HOYO, EL | Synonym of PILAS, LAS | Nicaragua | |
| HOYO, EL | Crater of TOLIMA, NEVADO DEL | Colombia | |
| HOYO, LAGUNA DE | Crater of TAHUAL | Guatemala | |
| HOYO, LAGUNA DE | Maar of SUCHITAN | Guatemala | |
| HOYO, VOLCAN EL | Stratovolcano of PILAS, LAS | Nicaragua | |
| HOYOS, CERRO LOS | Cone of ZITACUARO-VALLE DE BRAVO | México | |
| HRAFNSHILDARGIGIR | Crater Row of KRISUVIK | Iceland (southwestern) | |
| HRAFTINNUHRAUN | Crater Row of TORFAJOKULL | Iceland (southern) | |
| HRAFTINNUSKER | Dome of TORFAJOKULL | Iceland (southern) | |
| HRAUNBUNGA | Shield volcano of KRAFLA | Iceland (northeastern) | |
| HRAUNGIGUR | Fissure vent of HEKLA | Iceland (southern) | |
| HRAUNHALSHRAUN | Crater Row of VATNAFJOLL | Iceland (southern) | |
| HRAUNHOLL | Crater Row of KRISUVIK | Iceland (southwestern) | |
| HRAUNSELS-VATNSFELL | Shield volcano of KRISUVIK | Iceland (southwestern) | |
| HREIDHUR | Crater Row of REYKJANES | Iceland (southwestern) | |
| HROLFSVIKURHRAUN | Shield volcano of REYKJANES | Iceland (southwestern) | |
| HROMUNDARTINDUR | Cone of HENGILL | Iceland (southwestern) | |
| HRONARASSAR [KHRONARASSAR] | Cone of PORAK | Caucasus, Georgia & Armenia | |
| HROSSABORG | Tuff ring of ASKJA | Iceland (northeastern) | |
| HROSSADALIUR | Crater Row of KRAFLA | Iceland (northeastern) | |
| HROSSAGIGAR [HROSSADALIUR] | Crater Row of KRAFLA | Iceland (northeastern) | |
| HRUTAGJARDYNGJA | Shield volcano of KRISUVIK | Iceland (southwestern) | |
| HRUTSHALSAR | Fissure vent of ASKJA | Iceland (northeastern) | |
| HSI-CHIAO-TE-PU-SHAN [XIJIAODEBUSHAN] | Cone of WUDALIANCHI | China (eastern) | |
| HSI-HENG-TAO-SHAN [XIHENGDAOSHAN] | Cone of LONGGANG GROUP | China (eastern) | |
| HSI-PAI-TZU-LUNG-WAN [XIBAIZILONGWAN] | Crater of LONGGANG GROUP | China (eastern) | |
| HSIAO-I-SHAN [XIAOYISHAN] | Cone of LONGGANG GROUP | China (eastern) | |
| HSIAO-KU-SHAN [XIAOKUSHAN] | Cone of LONGGANG GROUP | China (eastern) | |
| HSIAO-LUNG-WAN [XIAOLONGWAN] | Crater of LONGGANG GROUP | China (eastern) | |
| HSIAO-WENG-CHUAN [XIAOWENGJUAN] | Cone of LONGGANG GROUP | China (eastern) | |
| HSIAO-YEN-CHIH-FENG [XIAOYANZHIFENG] | Cone of CHANGBAISHAN | China (eastern) | |
| HSING-AN-NAN-SHAN [XINGANNANSHAN] | Cone of LONGGANG GROUP | China (eastern) | |
| HUACHA, LOMA | Cinder cone of CRATER BASALT VOLCANIC FIELD | Southern Chile & Argentina | |
| HUALALAI | Shield volcano | Historical | Hawaiian Islands |
| HUALALAI, PUU | Synonym of HUALALAI | Hawaiian Islands | |
| HUALCA HUALCA | Stratovolcano of SABANCAYA | Perú | |
| HUALIAQUE | Synonym of APAGADO | Southern Chile & Argentina | |
| HUALLATIRE (HUALLATIRI) | Synonym of GUALLATIRI | Northern Chile, Bolivia & Argentina | |
| HUAMBO | Volcanic field | Radiocarbon | Perú |
| HUANCHANGUERAN, CERRO DE | Cinder cone of MICHOACAN-GUANAJUATO | México | |
| HUANGUILLARO | Stratovolcano of CHACHIMBIRO | Ecuador | |
| HUANGYANGLING | Cinder cone of KUNLUN VOLCANIC GROUP | China (western) | |
| HUANGZO | Pyroclastic Cone of HAINAN DAO | Southeast Asia | |
| HUANQUIHUE GROUP | Stratovolcanoes | Radiocarbon | Central Chile & Argentina |
| HUAPO | Cone of TENGCHONG | Southeast Asia | |
| HUARMI IMBABURA | Dome of IMBABURA | Ecuador | |
| HUAYNAPUTINA | Stratovolcano | Historical | Perú |
| HUAYPUNA [AMPATO] | Stratovolcano of SABANCAYA | Perú | |
| HUBERT, PITON | Cinder cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| HUBHUB AL SHEIKH | Synonym of BIRK, HARRAT AL | Arabia | |
| HUCKACK | Cone of HALLA | Korea | |
| HUDO-IKE [FUDO-IKE] | Crater of KIRISHIMA | Ryukyu Islands & Kyushu | |
| HUDSON MOUNTAINS | Stratovolcanoes | Uncertain | Antarctica & South Sandwich Islands |
| HUDSON, CERRO | Stratovolcano | Historical | Southern Chile & Argentina |
| HUECHULEPUN, VOLCAN | Cone of SOLLIPULLI | Central Chile & Argentina | |
| HUECO, CERRO | Shield volcano of ZUNI-BANDERA | USA (New Mexico) | |
| HUEHUEL, VOLCAN | Cone of CHICHINAUTZIN | México | |
| HUEHUELCON, VOLCAN | Cone of CHICHINAUTZIN | México | |
| HUENU-HUENU | Stratovolcano of CALBUCO | Southern Chile & Argentina | |
| HUENUAUCA | Synonym of OSORNO | Southern Chile & Argentina | |
| HUEQUE (HUEQUEN) | Synonym of HUEQUI | Southern Chile & Argentina | |
| HUEQUI | Stratovolcano | Historical | Southern Chile & Argentina |
| HUGA | Dome of CHACHIMBIRO | Ecuador | |
| HUGEN-DAKE [FUGEN-DAKE] | Stratovolcano of UNZEN | Ryukyu Islands & Kyushu | |
| HUGOLIN, CRATERES | Crater of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| HUIHUILANCO, LOMAS | Cone of CHICHINAUTZIN | México | |
| HUILA, NEVADO DEL | Stratovolcano | Historical | Colombia |
| HUILILCO | Cinder cone of QUETRUPILLAN | Central Chile & Argentina | |
| HUILOTE | Cinder cone of CHICHINAUTZIN | México | |
| HUILOTITO | Cinder cone of CHICHINAUTZIN | México | |
| HUINFIUCA | Fissure vent of LANIN | Central Chile & Argentina | |
| HUIPILO, VOLCAN | Cone of CHICHINAUTZIN | México | |
| HUITAN, CERRO | Dome of ALMOLONGA | Guatemala | |
| HUIZTOMAYO, CERRO | Cone of CHICHINAUTZIN | México | |
| HUKENO-YU [FUKENO-YU] | Thermal Feature of HACHIMANTAI | Honshu | |
| HUKUE-ZIMA | Synonym of FUKUE-JIMA | Ryukyu Islands & Kyushu | |
| HUKUTOKU-OKANOBA | Synonym of FUKUTOKU-OKANOBA | Izu, Volcano, & Mariana Islands | |
| HUKUZIN-KAIZAN | Synonym of FUKUJIN | Izu, Volcano, & Mariana Islands | |
| HUKUZIN-OKABA | Synonym of FUKUJIN | Izu, Volcano, & Mariana Islands | |
| HUKUZIN-OKANOBA | Synonym of FUKUJIN | Izu, Volcano, & Mariana Islands | |
| HULE, LAGUNA [BOSQUE ALEGRE] | Maar of POAS | Costa Rica | |
| HULU | Dome of LOLOBAU | New Britain | |
| HULUBELU | Caldera | Fumarolic | Sumatra |
| HULUHULU, PUU | Cone of KILAUEA | Hawaiian Islands | |
| HULULONGWAN | Crater of LONGGANG GROUP | China (eastern) | |
| HULUMAJANG | Synonym of HUTAPANJANG | Sumatra | |
| HUMAREDAS, CERRO LAS | Dome of AZUFRES, LOS | México | |
| HUMAREDAS, LAS | Synonym of HUMEROS, LOS | México | |
| HUMEROS, LOS | Calderas | Holocene? | México |
| HUMILLADEROS, MONTANA DE LOS | Cinder cone of HIERRO | Canary Islands | |
| HUMINGBIRD FUMAROLE | Thermal Feature of VALLES CALDERA | USA (New Mexico) | |
| HUNAHPU | Synonym of FUEGO | Guatemala | |
| HUNAHPU | Synonym of AGUA | Guatemala | |
| HUNGA TONGA-HUNGA HA'APAI | Submarine volcano | Historical | Tonga Islands |
| HUNGLUSHAN | Stratovolcano of TATUN GROUP | Taiwan | |
| HUNIHO | Stratovolcano of LIHIR | New Ireland | |
| HUNTER ISLAND | Stratovolcano | Historical | Pacific Ocean (southwestern) |
| HUOSHAN [HEISHAN] | Cone of TENGCHONG | Southeast Asia | |
| HUOSHAOSHAN | Cone of WUDALIANCHI | China (eastern) | |
| HUPPUSI [FUPPUSHI] | Stratovolcano of AKAN | Hokkaido | |
| HUPPUSI-DAKE [FUPPUSHI-DAKE] | Stratovolcano of SHIKOTSU | Hokkaido | |
| HURANO-DAKE | Stratovolcano of TOKACHI | Hokkaido | |
| HURATA, TAVANI | Cone of KUWAE | Vanuatu | |
| HUREBETU [FUREBETSU] | Stratovolcano of AKAN | Hokkaido | |
| HURRICANE HILL | Dome of NEVIS PEAK | West Indies | |
| HURU-DAKE [FURU-TAKE] | Stratovolcano of KUCHINOERABU-JIMA | Ryukyu Islands & Kyushu | |
| HURUS, JABAL AL | Cone of RAHAT, HARRAT | Arabia | |
| HUTAPANJANG | Stratovolcano | Holocene | Sumatra |
| HUTAYM, HARRAT | Synonym of ITHNAYN, HARRAT | Arabia | |
| HUTCHINSON | Stratovolcano of RAOUL ISLAND | Kermadec Islands | |
| HUTCHINSON HILL | Shield volcano of ST. PAUL ISLAND | Alaska (western) | |
| HUZI | Synonym of FUJI | Honshu | |
| HVANNSTOD | Crater Row of KRAFLA | Iceland (northeastern) | |
| HVERADALAHRAUN | Crater Row of HENGILL | Iceland (southwestern) | |
| HVERADALUR | Thermal Feature of KVERKFJOLL | Iceland (northeastern) | |
| HVERAGERDI | Thermal Feature of HENGILL | Iceland (southwestern) | |
| HVERAGIL | Crater of KRAFLA | Iceland (northeastern) | |
| HVERFJALL | Tuff ring of KRAFLA | Iceland (northeastern) | |
| HWEIAIN | Synonym of ICHINSKY | Kamchatka Peninsula | |
| HWNIINDI K'ELT'AENI | Synonym of SANFORD | Alaska (eastern) | |
| HYALO RIDGE | Tuya of WELLS GRAY-CLEARWATER | Canada | |
| HYDEWELL, MT. | Shield volcano of NEWER VOLCANICS PROV | Australia | |
| HYDROGRAPHERS RANGE | Stratovolcano | Holocene | New Guinea & D'Entrecasteaux Islands |
| HYOGOWAN | Crater of TORI-SHIMA | Izu, Volcano, & Mariana Islands | |
| HYOTAN-YAMA | Cone of MIYAKE-JIMA | Izu, Volcano, & Mariana Islands | |
| HYUUGA-DAKE | Dome of TSURUMI | Ryukyu Islands & Kyushu | |
| I MONTICELLI | Vent of VESUVIUS | Italy | |
| IAHU (IAHUE, IAHUL) | Synonym of YASUR | Vanuatu | |
| IAMALELE | Lava domes | Holocene | New Guinea & D'Entrecasteaux Islands |
| IAMELELE | Synonym of IAMALELE | New Guinea & D'Entrecasteaux Islands | |
| IASUR | Synonym of YASUR | Vanuatu | |
| IAVINSKIY | Synonym of YAVINSKY | Kamchatka Peninsula | |
| IBAYL, JABAL | Dome of KHAYBAR, HARRAT | Arabia | |
| IBEX MOUNTAIN CONE | Cone of ALLIGATOR LAKE | Canada | |
| IBI [GALLOSEULO] | Stratovolcano of HARGY | New Britain | |
| IBOE | Synonym of IBU | Halmahera | |
| IBU | Stratovolcano | Historical | Halmahera |
| IBUNGU HILLS | Cone of KIEYO | Africa (eastern) | |
| IBUSUKI VOLCANIC FIELD | Calderas | Historical | Ryukyu Islands & Kyushu |
| ICE PEAK | Stratovolcano of EDZIZA | Canada | |
| ICE SPRING | Crater of BLACK ROCK DESERT | USA (Utah) | |
| ICEFALL | Cone of EDZIZA | Canada | |
| ICHA | Synonym of ICHINSKY | Kamchatka Peninsula | |
| ICHINO-IKE | Crater of ON-TAKE | Honshu | |
| ICHINO-IKE | Crater of NORIKURA | Honshu | |
| ICHINOMEGATA | Maar of MEGATA | Honshu | |
| ICHINSKY | Stratovolcano | Historical | Kamchatka Peninsula |
| IDA RIDGE | Cone of WELLS GRAY-CLEARWATER | Canada | |
| IDAK, MOUNT | Cone of OKMOK | Aleutian Islands | |
| IDAMDEHE | Caldera of JAILOLO | Halmahera | |
| IDJEN, KAWAH | Synonym of IJEN | Java | |
| IDO-DAKE | Cone of HAKKODA GROUP | Honshu | |
| IDOLO, CERRO EL | Cone of ZITACUARO-VALLE DE BRAVO | México | |
| IDUP, KAWAH | Thermal Feature of SALAK | Java | |
| IDWA, JEBEL | Cone of MARRA, JEBEL | Africa (northern) | |
| IE JOE | Thermal Feature of SEULAWAH AGAM | Sumatra | |
| IEGATA-YAMA | Cone of AZUMA | Honshu | |
| IETTUNUP | Shield volcanoes | Holocene? | Kamchatka Peninsula |
| IFAGAO | Thermal Feature of POCDOL MOUNTAINS | Luzon | |
| IFWOKA | Cone of NGOZI | Africa (eastern) | |
| IGATONO-YAMA | Cone of FUJI | Honshu | |
| IGAYA | Fissure vent of MIYAKE-JIMA | Izu, Volcano, & Mariana Islands | |
| IGEK | Synonym of VENIAMINOF | Alaska Peninsula | |
| IGIR BINEM [BINEM] | Cone of DIENG VOLCANIC COMPLEX | Java | |
| IGLA MOUNTAIN | Stratovolcano of GORIASCHAIA SOPKA | Kuril Islands | |
| IGOREVSKY VOLCANO | Synonym of DZENZURSKY | Kamchatka Peninsula | |
| IGOREWSKIY | Synonym of DZENZURSKY | Kamchatka Peninsula | |
| IGUANA, LOMA | Cinder cone of SAN DIEGO | El Salvador & Honduras | |
| IGUANERO, CERRO | Cinder cone of IXTEPEQUE | Guatemala | |
| IGWISI HILLS | Tuff cones | Holocene | Africa (eastern) |
| IHUMATAO [MAUNGATAKETAKE] | Cone of AUCKLAND FIELD | New Zealand | |
| IILEWA | Cone of KILAUEA | Hawaiian Islands | |
| IIMORI-YAMA | Stratovolcano of KIRISHIMA | Ryukyu Islands & Kyushu | |
| IIUSU | Synonym of BARANSKY | Kuril Islands | |
| IJA | Synonym of IYA | Lesser Sunda Islands | |
| IJANG-ARGAPURA | Synonym of IYANG-ARGAPURA | Java | |
| IJEN | Stratovolcanoes | Historical | Java |
| IJEN, KAWAH | Synonym of IJEN | Java | |
| IKAPO | Maar of KIEYO | Africa (eastern) | |
| IKARMA | Synonym of EKARMA | Kuril Islands | |
| IKATHIWIK CRATER | Cone of NUNIVAK ISLAND | Alaska (western) | |
| IKEDA-HIGASHI | Cone of IZU-TOBU | Honshu | |
| IKEDA-KO | Caldera of IBUSUKI VOLCANIC FIELD | Ryukyu Islands & Kyushu | |
| IKENOKUBO | Tuff ring of ASO | Ryukyu Islands & Kyushu | |
| IKENOSAWA | Caldera of AOGA-SHIMA | Izu, Volcano, & Mariana Islands | |
| IKEZOKO | Maar of IBUSUKI VOLCANIC FIELD | Ryukyu Islands & Kyushu | |
| IKH TOGO UUL | Cinder cone of KHANUY GOL | Mongolia | |
| IKHA-TOGO-ULA [IKH TOGO UUL] | Cinder cone of KHANUY GOL | Mongolia | |
| IKINCILGOL TEPE | Cone of NEMRUT DAGI | Turkey | |
| IKTUNUP | Shield volcanoes | Holocene? | Kamchatka Peninsula |
| ILAEMAEN (ILAEMANSCHEN) | Synonym of ILIAMNA | Alaska (southwestern) | |
| ILAMATEPEC | Synonym of SANTA ANA | El Salvador & Honduras | |
| ILCHULBONG | Tuff cone of HALLA | Korea | |
| ILDBORG [ELDBORG] | Cone of LJOSUFJOLL | Iceland (western) | |
| ILE | See proper name (e.g. CENDRES, ILE DES) | French for ISLAND | |
| ILHEU DOS MOSTEIROS | Cone of SETE CIDADES | Azores | |
| ILIAMNA | Stratovolcano | Historical | Alaska (southwestern) |
| ILIBOLENG | Stratovolcano | Historical | Lesser Sunda Islands |
| ILIBOTONG | Dome of ILIMUDA | Lesser Sunda Islands | |
| ILIBURAK | Synonym of LEROBOLENG | Lesser Sunda Islands | |
| ILIGRIPE | Dome of ILIWERUNG | Lesser Sunda Islands | |
| ILIINSKAIA, SOPKA | Synonym of ILYINSKY | Kamchatka Peninsula | |
| ILIINSKAYA (ILIINSKY) | Synonym of ILYINSKY | Kamchatka Peninsula | |
| ILIKEDEKA | Stratovolcano | Pleistocene-Fumarolic | Lesser Sunda Islands |
| ILILABALEKAN | Stratovolcano | Fumarolic | Lesser Sunda Islands |
| ILILAMARAP (ILILAMARARAP) | Synonym of ILILABALEKAN | Lesser Sunda Islands | |
| ILILEWOTO (ILILEWOTOLO) | Synonym of LEWOTOLO | Lesser Sunda Islands | |
| ILIMOEDA | Synonym of ILIMUDA | Lesser Sunda Islands | |
| ILIMONJET | Dome of ILIWERUNG | Lesser Sunda Islands | |
| ILIMUDA | Stratovolcano | Fumarolic | Lesser Sunda Islands |
| ILINA | Synonym of ILYINSKY | Kamchatka Peninsula | |
| ILINITZA | Synonym of ILLINIZA | Ecuador | |
| ILINIZA | Synonym of ILLINIZA | Ecuador | |
| ILINSKY | Synonym of ILYINSKY | Kamchatka Peninsula | |
| ILIPENUTUN | Dome of ILIWERUNG | Lesser Sunda Islands | |
| ILIPETRUS [ILIGRIPE] | Dome of ILIWERUNG | Lesser Sunda Islands | |
| ILIPOEGORA | Synonym of ILIWERUNG | Lesser Sunda Islands | |
| ILITEBULELE | Cone of ILILABALEKAN | Lesser Sunda Islands | |
| ILIWEROENG | Synonym of ILIWERUNG | Lesser Sunda Islands | |
| ILIWERUNG | Complex volcano | Historical | Lesser Sunda Islands |
| ILIWOKAR | Cone of LEWOTOBI | Lesser Sunda Islands | |
| ILIYIN SOPKA | Synonym of ILYINSKY | Kamchatka Peninsula | |
| ILLAHRAUN | Crater Row of REYKJANES | Iceland (southwestern) | |
| ILLAHRAUN | Crater Row of KERLINGARFJOLL | Iceland (southwestern) | |
| ILLANO | Synonym of MAKATURING | Mindanao | |
| ILLANO | Synonym of RAGANG | Mindanao | |
| ILLASCAR | Synonym of LASCAR | Northern Chile, Bolivia & Argentina | |
| ILLI, PUU O | Cone of HALEAKALA | Hawaiian Islands | |
| ILLIHNUKUR | Tuya of TORFAJOKULL | Iceland (southern) | |
| ILLINIZA | Stratovolcano | Holocene | Ecuador |
| ILLINIZA NORTE | Stratovolcano of ILLINIZA | Ecuador | |
| ILLINIZA SUR | Stratovolcano of ILLINIZA | Ecuador | |
| ILLVIDRAHNJUKAHRAUN | Fissure vent of HOFSJOKULL | Iceland (southwestern) | |
| ILONGO | Dome of SW USANGU BASIN | Africa (eastern) | |
| ILOPANGO | Caldera | Historical | El Salvador & Honduras |
| ILYAMINSKAYA | Synonym of ILIAMNA | Alaska (southwestern) | |
| ILYINSKY | Stratovolcano | Historical | Kamchatka Peninsula |
| IMAC HILL | Cone of SAN PABLO VOLCANIC FIELD | Luzon | |
| IMBABURA | Compound volcano | Radiocarbon | Ecuador |
| IMMERUTA | Thermal Feature of LIPARI | Italy | |
| IMORIGASHIRO | Dome of TSURUMI | Ryukyu Islands & Kyushu | |
| IMPERIAL | Synonym of LLAIMA | Central Chile & Argentina | |
| IMUN | Unknown | Holocene? | Sumatra |
| IMURUK LAKE | Shield volcanoes | Radiocarbon | Alaska (western) |
| IN EZZANE VOLCANIC FIELD | Volcanic field | Holocene? | Africa (northern) |
| INABOSHI-YAMA | Dome of KUJU | Ryukyu Islands & Kyushu | |
| INAMURA-DAKE | Cone of KIKAI | Ryukyu Islands & Kyushu | |
| INAO-YAMA | Dome of UNZEN | Ryukyu Islands & Kyushu | |
| INARICHI | Cinder cone of UDOKAN PLATEAU | Russia (southeastern) | |
| INATORI GROUP | Crater of IZU-TOBU | Honshu | |
| INCAHUASI, NEVADO DE | Stratovolcanoes | Holocene? | Northern Chile, Bolivia & Argentina |
| INCEKAYA | Tuff cone of NEMRUT DAGI | Turkey | |
| INDE | Crater of LOWER CHINDWIN | Southeast Asia | |
| INDEFATIGABLE | Synonym of SANTA CRUZ | Galápagos Islands | |
| INDIAN BUTTE | Cone of NEWBERRY | USA (Oregon) | |
| INDIAN BUTTE | Cone of NEWBERRY | USA (Oregon) | |
| INDIAN BUTTE | Cone of MEDICINE LAKE | USA (California) | |
| INDIAN HEAVEN | Shield volcanoes | Radiocarbon | USA (Washington) |
| INDIAN PASS | Cinder cone of GLACIER PEAK | USA (Washington) | |
| INDIAN POND | Crater of YELLOWSTONE | USA (Wyoming) | |
| INDOOLI MOUNTAIN | Cone of NUNIVAK ISLAND | Alaska (western) | |
| INDRAPURA, PEAK OF | Synonym of KERINCI | Sumatra | |
| INE RUA | Thermal Feature of POCO LEOK | Lesser Sunda Islands | |
| INERI | Synonym of INIERIE | Lesser Sunda Islands | |
| INFANTES, LOS [SIETE FUENTES] | Cinder cone of TENERIFE | Canary Islands | |
| INFERNO | Cone of CRATERS OF THE MOON | USA (Idaho) | |
| INFIERNILLOS CIEGOS DE CANDELARIA SAN VICENTE | Thermal Feature of SAN VICENTE | El Salvador & Honduras | |
| INFIERNILLOS DE CHINAMECA | Thermal Feature of CHINAMECA | El Salvador & Honduras | |
| INGAKSLUGWAT HILLS | Cinder cones | Holocene | Alaska (western) |
| INGAMAKIT | Dome of UDOKAN PLATEAU | Russia (southeastern) | |
| INGENIO, EL [CERRO LA CELOSA] | Cone of OLLAGUE | Northern Chile, Bolivia & Argentina | |
| INGILOFOTSY | Dome of ITASY VOLCANIC FIELD | Indian Ocean (western) | |
| INGLES, PICO [GUARARI] | Cinder cone of BARVA | Costa Rica | |
| INGO | Cone of KARISIMBI | Africa (central) | |
| INGRI BUTTE | Cone of NUNIVAK ISLAND | Alaska (western) | |
| INGRIJOAK HILLS | Cone of NUNIVAK ISLAND | Alaska (western) | |
| INGRILUKAT-NASKORAT HILL | Cone of NUNIVAK ISLAND | Alaska (western) | |
| INGRIRUK HILL | Cone of NUNIVAK ISLAND | Alaska (western) | |
| INIE LIKA | Synonym of INIELIKA | Lesser Sunda Islands | |
| INIE RIE | Synonym of INIERIE | Lesser Sunda Islands | |
| INIELIKA | Complex volcano | Historical | Lesser Sunda Islands |
| INIELIKA, WOLO | Crater of INIELIKA | Lesser Sunda Islands | |
| INIERIE | Stratovolcano | Radiocarbon | Lesser Sunda Islands |
| INMAN NUNATAK | Cone of HUDSON MOUNTAINS | Antarctica & South Sandwich Islands | |
| INN, CERRO | Cone of SANTIAGO | Galápagos Islands | |
| INNACCESIBLE CONES | Cinder cone of BELKNAP | USA (Oregon) | |
| INNDALSMOYA-STAKKEN | Dome of JAN MAYEN | Atlantic Ocean (Jan Mayen) | |
| INREROW ATAMWAN | Stratovolcano of ANEITYUM | Vanuatu | |
| INUKURA-YAMA | Stratovolcano of IWATE | Honshu | |
| INUNUMURI | Cone of DAKATAUA | New Britain | |
| INUSUZUMI-YAMA | Cone of FUJI | Honshu | |
| INYENYESE | Cone of KIEYO | Africa (eastern) | |
| INYO CRATERS | Lava domes | Radiocarbon | USA (California) |
| INZOLFATA | Thermal Feature of LIPARI | Italy | |
| IO [KUDRIAVY] | Stratovolcano of MEDVEZHIA | Kuril Islands | |
| IO SAN [CHERNY] | Stratovolcano of CHIRPOI | Kuril Islands | |
| IO-SIMA | Synonym of IOTO [IWO-JIMA] | Izu, Volcano, & Mariana Islands | |
| IO-TORI-SIMA | Synonym of IWO-TORI-SHIMA | Ryukyu Islands & Kyushu | |
| IO-YAMA | Synonym of EBEKO | Kuril Islands | |
| IOTO | Synonym of IOTO [IWO-JIMA] | Izu, Volcano, & Mariana Islands | |
| IOTO [IWO-JIMA] | Caldera | Historical | Izu, Volcano, & Mariana Islands |
| IOZIMA-SINTO [SHOWA-IWO-JIMA] | Dome of KIKAI | Ryukyu Islands & Kyushu | |
| IPALA | Stratovolcano | Holocene | Guatemala |
| IPPEKI-KO | Maar of IZU-TOBU | Honshu | |
| IPSWOOT BUTTE | Cone of NEWBERRY | USA (Oregon) | |
| IRADA | Synonym of IRAYA | North of Luzon | |
| IRAMBA | Maar of KIEYO | Africa (eastern) | |
| IRARHRAUN | Fissure vent of EYJAFJOLL | Iceland (southern) | |
| IRAYA | Stratovolcano | Historical | North of Luzon |
| IRAZU | Stratovolcano | Historical | Costa Rica |
| IRIGA | Stratovolcano | Holocene | Luzon |
| IRIND | Cone of ARAGATS | Caucasus, Georgia & Armenia | |
| IRIOMOTE-JIMA | Submarine volcano | Historical | Ryukyu Islands & Kyushu |
| IRIOMOTEZIMA | Synonym of IRIOMOTE-JIMA | Ryukyu Islands & Kyushu | |
| IROSIN | Pleistocene caldera of BULUSAN | Luzon | |
| IRRUPUTUNCO | Synonym of IRRUPUTUNCU | Northern Chile, Bolivia & Argentina | |
| IRRUPUTUNCU | Stratovolcano | Historical | Northern Chile, Bolivia & Argentina |
| IRTA ALE | Synonym of ERTA ALE | Africa (northeastern) & Red Sea | |
| IRUPUTUNCU | Synonym of IRRUPUTUNCU | Northern Chile, Bolivia & Argentina | |
| ISABELLA | Cone of CAMEROON | Africa (western) | |
| ISANNACH (ISANNACHOTSKI) | Synonym of ISANOTSKI | Aleutian Islands | |
| ISANOTSKI | Stratovolcano | Uncertain | Aleutian Islands |
| ISAROG | Stratovolcano | Fumarolic | Luzon |
| ISBIL, JABAL | Stratovolcano of DHAMAR, HARRAS OF | Arabia | |
| ISCHDSCHEA, HARRET [HALA-'L-'ISHQUA] | Tuff cone of 'UWAYRID, HARRAT | Arabia | |
| ISCHIA | Complex volcano | Historical | Italy |
| ISCHIA, ISOLA DELL' | Synonym of ISCHIA | Italy | |
| ISHI-MINE | Dome of IBUSUKI VOLCANIC FIELD | Ryukyu Islands & Kyushu | |
| ISHIBORA | Fissure vent of AKITA-KOMAGA-TAKE | Honshu | |
| 'ISHQUA, HALA-'L- | Tuff cone of 'UWAYRID, HARRAT | Arabia | |
| ISKUT CANYON [ISKUT RIVER] | Cone of ISKUT-UNUK RIVER CONES | Canada | |
| ISKUT RIVER | Cone of ISKUT-UNUK RIVER CONES | Canada | |
| ISKUT-UNUK RIVER CONES | Cinder cones | Radiocarbon | Canada |
| ISLA | See proper name (e.g. ZAPATERA, ISLA) | Spanish for ISLAND | |
| ISLA DEL CERRO [CERRO GRANDE] | Dome of COATEPEQUE CALDERA | El Salvador & Honduras | |
| ISLAND PARK | Pleistocene caldera of YELLOWSTONE | USA (Wyoming) | |
| ISLETA, LA | Cone of GRAN CANARIA | Canary Islands | |
| ISLETA, LA | Cone of GRAN CANARIA | Canary Islands | |
| ISLONGA (ISLUCA) | Synonym of ISLUGA | Northern Chile, Bolivia & Argentina | |
| ISLOTA | See proper name (e.g. GONZALES, ISLOTA) | Italian for ISLAND | |
| ISLUGA | Stratovolcano | Historical | Northern Chile, Bolivia & Argentina |
| ISOLA | See proper name (e.g. BISENTINA, ISOLA) | Italian for ISLAND | |
| ISOTOCHNIKY | Cinder cone of TOLBACHIK | Kamchatka Peninsula | |
| ISSAIKYO | Cone of AZUMA | Honshu | |
| ISSANAKSKI | Synonym of ISANOTSKI | Aleutian Islands | |
| ISTMO | Thermal Feature of VULCANO | Italy | |
| ISUAN [MAQUILING] | Stratovolcano of SAN PABLO VOLCANIC FIELD | Luzon | |
| ITAM | Thermal Feature of UNGARAN | Java | |
| ITAMBA | Maar of KIEYO | Africa (eastern) | |
| ITANKIOI | Synonym of PREVO PEAK | Kuril Islands | |
| ITASHIBEONI-IWO-ZAN | Synonym of SHIRETOKO-IWO-ZAN | Hokkaido | |
| ITASIBEONI-IWO-ZAN | Synonym of SHIRETOKO-IWO-ZAN | Hokkaido | |
| ITASY VOLCANIC FIELD | Scoria cones | Radiocarbon | Indian Ocean (western) |
| ITENDE | Maar of KIEYO | Africa (eastern) | |
| ITETE | Cone of KIEYO | Africa (eastern) | |
| ITHNAIN | Synonym of ITHNAYN, HARRAT | Arabia | |
| ITHNAYN, HARRAT | Volcanic field | Holocene | Arabia |
| ITHUNDU | Cone of CHYULU HILLS | Africa (eastern) | |
| ITIBISINAI | Synonym of GOLOVNIN | Kuril Islands | |
| ITINO-IKE [ICHINO-IKE] | Crater of ON-TAKE | Honshu | |
| ITINO-IKE [ICHINO-IKE] | Crater of NORIKURA | Honshu | |
| ITINOMEGATA [ICHINOMEGATA] | Maar of MEGATA | Honshu | |
| ITSCHINSKIJ | Synonym of ICHINSKY | Kamchatka Peninsula | |
| ITTISA | Cone of GEDAMSA CALDERA | Africa (northeastern) & Red Sea | |
| IVAN GROZNY | Somma volcano of GROZNY GROUP | Kuril Islands | |
| IVANOV | Dome of BOLSHOI SEMIACHIK | Kamchatka Peninsula | |
| IVAO GROUP | Cinder cones | Holocene | Kuril Islands |
| IVERSON CREEK VOLC FIELD | Volcanic field of TUYA VOLCANIC FIELD | Canada | |
| IVTH NATIONAL VOLC CONGRESS | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| IWA-YAMA | Synonym of SMIRNOV | Kuril Islands | |
| IWAIGO-DAKE | Dome of KUJU | Ryukyu Islands & Kyushu | |
| IWAKI | Stratovolcano | Historical | Honshu |
| IWAKI-SAN | Dome of IWAKI | Honshu | |
| IWALE | Crater of KIEYO | Africa (eastern) | |
| IWANO-YAMA | Dome of IZU-TOBU | Honshu | |
| IWANOKUBO | Cone of IZU-TOBU | Honshu | |
| IWANOKUBO | Cone of IZU-TOBU | Honshu | |
| IWAONUPURI | Dome of NISEKO | Hokkaido | |
| IWATE | Complex volcano | Historical | Honshu |
| IWATE-FUJI (IWATE-HUZI) | Synonym of IWATE | Honshu | |
| IWIKAU | Vent of RUAPEHU | New Zealand | |
| IWO-DAKE | Dome of KIKAI | Ryukyu Islands & Kyushu | |
| IWO-DAKE | Synonym of YAKE-DAKE | Honshu | |
| IWO-JIMA-SHINTO [SHOWA-IWO-JIMA] | Dome of KIKAI | Ryukyu Islands & Kyushu | |
| IWO-TORI-SHIMA | Complex volcano | Historical | Ryukyu Islands & Kyushu |
| IWO-YAMA | Dome of KIRISHIMA | Ryukyu Islands & Kyushu | |
| IWO-YAMA | Synonym of ADATARA | Honshu | |
| IWO-YAMA | Cone of TORI-SHIMA | Izu, Volcano, & Mariana Islands | |
| IWO-ZAN | Synonym of EBEKO | Kuril Islands | |
| IWO-ZIMA | Synonym of IOTO [IWO-JIMA] | Izu, Volcano, & Mariana Islands | |
| IWODAKE | Cone of IWO-TORI-SHIMA | Ryukyu Islands & Kyushu | |
| IXPACO, LAGUNA | Tuff ring of TECUAMBURRO | Guatemala | |
| IXTACCIHUATL | Synonym of IZTACCIHUATL | México | |
| IXTEPECE | Synonym of IXTEPEQUE | Guatemala | |
| IXTEPEQUE | Lava domes | Holocene | Guatemala |
| IXTETAL | Dome of CUMBRES, LAS | México | |
| IXTLAN, GEYSERS DE | Thermal Feature of MICHOACAN-GUANAJUATO | México | |
| IYA | Stratovolcano | Historical | Lesser Sunda Islands |
| IYANG-ARGAPURA | Complex volcano | Holocene | Java |
| IYU-ZAN | Cone of IZU-TOBU | Honshu | |
| IZALCO | Stratovolcano | Historical | El Salvador & Honduras |
| IZTACCIHUATL | Stratovolcano | Holocene | México |
| IZTACTEPETL | Synonym of IZTACCIHUATL | México | |
| IZTALTETLAC, CERRO | Cinder cone of PAPAYO | México | |
| IZU | Crater of MIYAKE-JIMA | Izu, Volcano, & Mariana Islands | |
| IZU-OSHIMA | Synonym of OSHIMA | Izu, Volcano, & Mariana Islands | |
| IZU-TOBU | Pyroclastic cones | Historical | Honshu |
| IZU-TORI-SHIMA | Synonym of TORI-SHIMA | Izu, Volcano, & Mariana Islands | |
| IZUMBWE-MPOLI | Pyroclastic cones | Holocene | Africa (eastern) |
| JABALI, CERROS DEL | Cinder cone of MICHOACAN-GUANAJUATO | México | |
| JABALI, EL | Stratovolcano of SAN SALVADOR | El Salvador & Honduras | |
| JABALINCITO, EL [SITIO GRANDE] | Crater of SAN SALVADOR | El Salvador & Honduras | |
| JABLE, MONTANA DEL | Cinder cone of HIERRO | Canary Islands | |
| JABONCILLO, CERRO | Cinder cone of AGUA | Guatemala | |
| JABUT, BUKIT [BUKIT CABUT] | Cone of BESAR | Sumatra | |
| JACKMOSKY | Synonym of CHIKURACHKI | Kuril Islands | |
| JACK'S JUMP | Cone of WELLS GRAY-CLEARWATER | Canada | |
| JADI, GUNUNG | Former dome of GALUNGGUNG | Java | |
| JAE PANAS HOT SPRING | Thermal Feature of BRATAN | Lesser Sunda Islands | |
| JAG PEAK | Cone of OKMOK | Aleutian Islands | |
| JAGUEY, EL | Maar of DURANGO VOLCANIC FIELD | México | |
| JAILOLO | Stratovolcano | Holocene | Halmahera |
| JAJARANA, CERRO | Cinder cone of ANDAHUA-ORCOPAMPA | Perú | |
| JALAJALA | Thermal Feature of LAGUNA CALDERA | Luzon | |
| JALAPASQUILLO [XALAPASQUILLO] | Maar of SERDAN-ORIENTAL | México | |
| JALAPASQUILLO [XALAPASQUILLO] | Maar of SERDAN-ORIENTAL | México | |
| JALI [JALLI] | Synonym of YALI | Greece | |
| JALUA | Stratovolcano | Holocene | Africa (northeastern) & Red Sea |
| JAMAKATAN | Cone of PAKA | Africa (eastern) | |
| JAMBANGAN | Caldera of SEMERU | Java | |
| JAMBANGAN | Crater of IYANG-ARGAPURA | Java | |
| JAMES | Synonym of SANTIAGO | Galápagos Islands | |
| JAN MAYEN | Stratovolcano | Historical | Atlantic Ocean (Jan Mayen) |
| JANG | Synonym of IYANG-ARGAPURA | Java | |
| JANGHUDI (JANGUDI) | Synonym of YANGUDI | Africa (northeastern) & Red Sea | |
| JANOO | Cone of ASO | Ryukyu Islands & Kyushu | |
| JAPATI | Crater of GUNTUR | Java | |
| JAPONES | Crater of LLAIMA | Central Chile & Argentina | |
| JARA, CERRO LA | Dome of VALLES CALDERA | USA (New Mexico) | |
| JARAGUAY VOLCANIC FIELD | Cinder cones | Holocene | México |
| JARAPENA, VOLCAN LA | Crater of PINACATE | México | |
| JAR'ATAIN, HARRA OF | Cone of YAR, JABAL | Arabia | |
| JARDBADSHOLAR [BJARNARFLAG] | Crater Row of KRAFLA | Iceland (northeastern) | |
| JARIAN, KAWAH | Crater of TANGKUBANPARAHU | Java | |
| JARRA | Synonym of YAR, JABAL | Arabia | |
| JAWALO | Crater of PALUWEH | Lesser Sunda Islands | |
| JAYU KHOTA, LAGUNA | Maars | Holocene | Northern Chile, Bolivia & Argentina |
| JAYU KKOTA | Synonym of JAYU KHOTA, LAGUNA | Northern Chile, Bolivia & Argentina | |
| JEAN | Crater of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| JEBEL | See proper name (e.g. MARRA, JEBEL) | Arabic for MT. | |
| JECHAPITA, VOLCAN | Cinder cone of ANDAHUA-ORCOPAMPA | Perú | |
| JEFFERSON | Stratovolcano | Varve Count | USA (Oregon) |
| JEJU | Synonym of HALLA | Korea | |
| JELLICOE PARK | Cone of AUCKLAND FIELD | New Zealand | |
| JEMEZ SPRINGS | Thermal Feature of VALLES CALDERA | USA (New Mexico) | |
| JEMEZ VOLC FIELD | Synonym of VALLES CALDERA | USA (New Mexico) | |
| JENCHANA, VOLCAN | Cinder cone of ANDAHUA-ORCOPAMPA | Perú | |
| JENOY | Pleistocene caldera of GALERAS | Colombia | |
| JEREMINE | Crater of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| JERO | Crater of ARJUNO-WELIRANG | Java | |
| JESUS DEL MONTE, CERRO | Cinder cone of COMONDU-LA PURISIMA | México | |
| JESUS GRANDE, ISLA DE | Lava cone of ZAPATERA | Nicaragua | |
| JGOREWSKIJ | Synonym of DZENZURSKY | Kamchatka Peninsula | |
| JIANSHUIDINGZI | Cone of LONGGANG GROUP | China (eastern) | |
| JIAOSHAN | Cone of TENGCHONG | Southeast Asia | |
| JIBAL | See proper name (e.g. DIBA' AL HURUS, JIBAL) | Arabic for MT. | |
| JIBBEL | See proper name (e.g. TIR, JIBBEL) | Arabic for MT. | |
| JICALAN, CERRO DE | Cinder cone of MICHOACAN-GUANAJUATO | México | |
| JIGABO | Thermal Feature of MALINAO | Luzon | |
| JIGOKU | Thermal Feature of ASO | Ryukyu Islands & Kyushu | |
| JIGOKU | Crater of ON-TAKE | Honshu | |
| JIGOKU | Thermal Feature of OSORE-YAMA | Honshu | |
| JIGOKU SPA | Vent of ASO | Ryukyu Islands & Kyushu | |
| JIGOKU YAMA [TREZUBETZ] | Somma volcano of KOLOKOL GROUP | Kuril Islands | |
| JIGOKU-ATO | Crater of UNZEN | Ryukyu Islands & Kyushu | |
| JIGOKU-DANI | Crater of TATE-YAMA | Honshu | |
| JIGOKU-DANI | Pyroclastic Cone of KUTTARA | Hokkaido | |
| JIGOKU-NO-OANA | Crater of HAKU-SAN | Honshu | |
| JIGOKU-NUMA | Crater of HAKKODA GROUP | Honshu | |
| JILGUERO, CERRO EL | Dome of AZUFRES, LOS | México | |
| JILOA | Caldera of APOYEQUE | Nicaragua | |
| JIM JIM, THE | Cone of NEWER VOLCANICS PROV | Australia | |
| JIMAT | Cone of DIENG VOLCANIC COMPLEX | Java | |
| JINAKA-YAMA | Dome of NII-JIMA | Izu, Volcano, & Mariana Islands | |
| JINAMAR, MONTANA | Cone of GRAN CANARIA | Canary Islands | |
| JINETSU HOT SPRINGS | Thermal Feature of KUSATSU-SHIRANE | Honshu | |
| JING-BEI (JINGBOHU, JINGPOHU) | Synonym of JINGBO | China (eastern) | |
| JINGBO | Volcanic field | Radiocarbon | China (eastern) |
| JINGGO, KEPUNDAN | Crater of MARAPI | Sumatra | |
| JINGLONGDINGZI | Pyroclastic Cone of LONGGANG GROUP | China (eastern) | |
| JIROU-UEMONTSUKA | Cone of FUJI | Honshu | |
| JISKOOKSNUK HILL | Cone of NUNIVAK ISLAND | Alaska (western) | |
| JIYUNLING | Cone of LEIZHOU BANDAO | Southeast Asia | |
| JIZO HOT SPRINGS | Thermal Feature of KUSATSU-SHIRANE | Honshu | |
| JIZO-DAKE | Dome of AKAGI | Honshu | |
| JIZO-SAN | Dome of ZAO | Honshu | |
| JIZODO GROUP | Vent of IZU-TOBU | Honshu | |
| JIZONO-YU | Thermal Feature of TSURUMI | Ryukyu Islands & Kyushu | |
| JLIAMNA | Synonym of ILIAMNA | Alaska (southwestern) | |
| JOAO FERNANDES, PICO | Cone of AGUA DE PAU | Azores | |
| JOB, MT. | Cone of MEAGER | Canada | |
| JOBOSHI | Cinder cone of IZU-TOBU | Honshu | |
| JOCOTILLO, CERRO EL | Cinder cone of CUILAPA-BARBARENA | Guatemala | |
| JOCOTITLAN | Stratovolcano | Radiocarbon | México |
| JOGLO, MT. | Dome of MURIA | Java | |
| JOGO-YAMA | Dome of KOZU-SHIMA | Izu, Volcano, & Mariana Islands | |
| JOHANN ALBRECHT HAFEN | Caldera of GAROVE | New Britain | |
| JOHN, MORNE | Dome of WATT, MORNE | West Indies | |
| JOHNSON GLACIER | Dome of ILIAMNA | Alaska (southwestern) | |
| JOKULSTALLAR | Shield volcano of LANGJOKULL | Iceland (southwestern) | |
| JOLO | Pyroclastic cones | Historical | Sulu Islands |
| JOLO | Pyroclastic cones | Historical | Sulu Islands |
| JOLOM, CERRO | Dome of SANTO TOMAS | Guatemala | |
| JOLOTEPEC, CERRO LOS | Cinder cone of GLORIA, LA | México | |
| JONGGRING SELOKO | Crater of SEMERU | Java | |
| JORDA, PUIG | Cone of OLOT VOLCANIC FIELD | Western Europe | |
| JORDAN CRATERS | Volcanic field | Radiocarbon | USA (Oregon) |
| JORGENCAL (JORJENCAL) | Synonym of PUTANA | Northern Chile, Bolivia & Argentina | |
| JORMAJAN, MT. | Dome of BULUSAN | Luzon | |
| JOROBADO | Synonym of CORCOVADO | Southern Chile & Argentina | |
| JORULLO | Cinder cone of MICHOACAN-GUANAJUATO | México | |
| JOSEPHINE, MT. | Cone of TUYA VOLCANIC FIELD | Canada | |
| JOYA DE LIMON, CERRITO | Cinder cone of CUILAPA-BARBARENA | Guatemala | |
| JOYA, CERRO LA | Cinder cone of COMONDU-LA PURISIMA | México | |
| JOYA, CERRO LA | Cinder cone of CHICHINAUTZIN | México | |
| JOYA, LA | Cinder cone of COFRE DE PEROTE | México | |
| JOYA, LA | Cinder cone of SAN SALVADOR | El Salvador & Honduras | |
| JOYA, LA | Maar of PILAS, LAS | Nicaragua | |
| JOYA, LA | Vent of GRANADA | Nicaragua | |
| JOYA, LA | Crater of GALERAS | Colombia | |
| JRBASHYANA | Cone of GHEGAM RIDGE | Caucasus, Georgia & Armenia | |
| JUAN MURILLO | Cinder cone of PLATANAR | Costa Rica | |
| JUAN PERDOMO, MONTANA DE | Cone of LANZAROTE | Canary Islands | |
| JUANACANLA | Cone of ZITACUARO-VALLE DE BRAVO | México | |
| JUBAN, MT. | Cone of BULUSAN | Luzon | |
| JUBILEE [YUBILEINOYE] | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| JUCUAPA | Synonym of TIGRE, EL | El Salvador & Honduras | |
| JUEOCKACK | Cone of HALLA | Korea | |
| JULAN, MONTANAS DE | Cinder cone of HIERRO | Canary Islands | |
| JULIEN, MORNE | Cone of PELEE | West Indies | |
| JUMAYTEPEQUE | Stratovolcano | Holocene? | Guatemala |
| JUMENTO | Cinder cone of CHICHINAUTZIN | México | |
| JUMES, PUY DE | Cone of CHAINE DES PUYS | Western Europe | |
| JUNACANILA, CERRO | Cinder cone of ZITACUARO-VALLE DE BRAVO | México | |
| JUNGA-IKE | Crater of YAKE-DAKE | Honshu | |
| JUNIOR'S KOP | Cinder cone of MARION ISLAND | Indian Ocean (southern) | |
| JUNQUILLO NORTE, CERRO EL | Cinder cone of CUILAPA-BARBARENA | Guatemala | |
| JUNQUILLO SUR, CERRO EL | Cinder cone of CUILAPA-BARBARENA | Guatemala | |
| JUNQUILLO, CERRO | Cinder cone of SAN DIEGO | El Salvador & Honduras | |
| JUNTA, CERRO LA | Cinder cone of COMONDU-LA PURISIMA | México | |
| JURANG SIUNIK | Crater of SORIKMARAPI | Sumatra | |
| JURIG, KAWAH | Crater of TANGKUBANPARAHU | Java | |
| JURIQUES, VOLCAN | Stratovolcano of LICANCABUR | Northern Chile, Bolivia & Argentina | |
| JUTE, CERRO DEL | Cinder cone of MOYUTA | Guatemala | |
| JUTIAPA GROUP | Synonym of SANTIAGO, CERRO | Guatemala | |
| JYOBU HOT SPRINGS | Thermal Feature of KUSATSU-SHIRANE | Honshu | |
| JYOGAHANA | Stratovolcano of KUCHINOERABU-JIMA | Ryukyu Islands & Kyushu | |
| KA MOA O PELE | Cone of HALEAKALA | Hawaiian Islands | |
| KA-ER-DAXI [ASHI SHAN] | Cinder cone of KUNLUN VOLCANIC GROUP | China (western) | |
| KAABA | Synonym of KABA | Sumatra | |
| KAALKOPPIE | Tuff cone of MARION ISLAND | Indian Ocean (southern) | |
| KABA | See proper name (e.g. BARU, KABA) | Indonesian for CRATER | |
| KABA | Stratovolcano | Historical | Sumatra |
| KABARGIN OTH GROUP | Cinder cones | Holocene | Caucasus, Georgia & Armenia |
| KABARUGI | Crater of BUNYARUGURU | Africa (central) | |
| KABINLANGAN | Thermal Feature of CAGUA | Luzon | |
| KABIRANJUMA | Crater of MUHAVURA | Africa (central) | |
| KABIU [KOMBIU] | Stratovolcano of RABAUL | New Britain | |
| KABUJUTAN [KABUYUTAN] | Crater of GUNTUR | Java | |
| KABUN BUNGO [KEBUN BUNGO] | Crater of MARAPI | Sumatra | |
| KABUTO-YAMA | Cone of AZUMA | Honshu | |
| KABUYUTAN | Crater of GUNTUR | Java | |
| KADIENDI NAE | Dome of TAMBORA | Lesser Sunda Islands | |
| KADJOR [KAJOR] | Fissure vent of MERBABU | Java | |
| KADOGO | Cone of NYAMURAGIRA | Africa (central) | |
| KADONO | Cinder cone of IZU-TOBU | Honshu | |
| KADOVAR | Stratovolcano | Holocene | Northeast of New Guinea |
| KADOWAKI-KAIKYU | Submarine vent of IZU-TOBU | Honshu | |
| KADYR-SUGSKII | Shield volcano of AZAS PLATEAU | Russia (southeastern) | |
| KADYR-TAYGA | Shield volcano of AZAS PLATEAU | Russia (southeastern) | |
| KAGAMIL | Stratovolcano | Historical | Aleutian Islands |
| KAGANO | Cone of NYAMURAGIRA | Africa (central) | |
| KAGO-YAMA | Dome of ADATARA | Honshu | |
| KAGODE | Tuff cone of FORT PORTAL | Africa (central) | |
| KAGUSA HOT SPRINGS | Thermal Feature of KUSATSU-SHIRANE | Honshu | |
| KAGUYAK | Stratovolcano | Holocene | Alaska Peninsula |
| KAHAUALEA, PUU | Cone of KILAUEA | Hawaiian Islands | |
| KAHE KAHE | Synonym of FALCON ISLAND | Tonga Islands | |
| KAHEKAHE TANGATA | Synonym of METIS SHOAL | Tonga Islands | |
| KAHOLUA O KAHAWALI | Cone of KILAUEA | Hawaiian Islands | |
| KAHONGOLE | Cone of NYAMURAGIRA | Africa (central) | |
| KAHUWAI | Pit crater of KILAUEA | Hawaiian Islands | |
| KAIA [TAVURVUR] | Stratovolcano of RABAUL | New Britain | |
| KAIAMU | Maar of SULU RANGE | New Britain | |
| KAIBUN [KAIMON] | Stratovolcano of IBUSUKI VOLCANIC FIELD | Ryukyu Islands & Kyushu | |
| KAIKATA SEAMOUNT | Submarine volcano | Fumarolic | Izu, Volcano, & Mariana Islands |
| KAIKOHE | Cone of KAIKOHE-BAY OF ISLANDS | New Zealand | |
| KAIKOHE-BAY OF ISLANDS | Volcanic field | Radiocarbon | New Zealand |
| KAILENEY | Shield volcano | Holocene? | Kamchatka Peninsula |
| KAILIA | Thermal Feature of NISYROS | Greece | |
| KAILUPA | Cone of JAILOLO | Halmahera | |
| KAIMALOO | Cone of HALEAKALA | Hawaiian Islands | |
| KAIMANAWA | Dome of MAROA | New Zealand | |
| KAIMENI [KAMENO VOUNO] | Dome of METHANA | Greece | |
| KAIMON | Stratovolcano of IBUSUKI VOLCANIC FIELD | Ryukyu Islands & Kyushu | |
| KAINO-SEMIACHIK [CENO-SEMIACHIK] | Stratovolcano of MALY SEMIACHIK | Kamchatka Peninsula | |
| KAIRURU | Dome of REPOROA | New Zealand | |
| KAISEINISHINOBA | Submarine vent of IOTO [IWO-JIMA] | Izu, Volcano, & Mariana Islands | |
| KAISENOBA | Synonym of KITA-FUKUTOKUTAI | Izu, Volcano, & Mariana Islands | |
| KAISER WILHELM MOUNTAIN | Synonym of HEARD | Indian Ocean (southern) | |
| KAITOKU KAIZAN | Synonym of KAITOKU SEAMOUNT | Izu, Volcano, & Mariana Islands | |
| KAITOKU SEAMOUNT | Submarine volcano | Historical | Izu, Volcano, & Mariana Islands |
| KAITOKU-OKANOBA | Synonym of KAITOKU SEAMOUNT | Izu, Volcano, & Mariana Islands | |
| KAJIANA | Crater of TO-SHIMA | Izu, Volcano, & Mariana Islands | |
| KAJONGO | Tuff cone of FORT PORTAL | Africa (central) | |
| KAJOR | Fissure vent of MERBABU | Java | |
| KAKAMBUI | Cone of CHYULU HILLS | Africa (eastern) | |
| KAKHTANA | Shield volcano of VOYAMPOLSKY | Kamchatka Peninsula | |
| KAKO | Crater of BUNYARUGURU | Africa (central) | |
| KAKORINYA | Shield volcano of BARRIER, THE | Africa (eastern) | |
| KALAIEHA, PUU | Cone of MAUNA KEA | Hawaiian Islands | |
| KALALUA | Cone of KILAUEA | Hawaiian Islands | |
| KALAMBIS | Thermal Feature of BILIRAN | Central Philippines | |
| KALAMOS | Thermal Feature of MILOS | Greece | |
| KALANG | Synonym of KARANG | Java | |
| KALATUNGAN | Stratovolcano | Holocene? | Mindanao |
| KALAWANGAN | Thermal Feature of PINATUBO | Luzon | |
| KALE TEPE | Dome of NEMRUT DAGI | Turkey | |
| KALECI | Dome of ACIGOL-NEVSEHIR | Turkey | |
| KALEM | Cone of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| KALEPEAMOA, PUU | Cone of MAUNA KEA | Hawaiian Islands | |
| KALFADALSHRAUN | Crater Row of BRENNISTEINSFJOLL | Iceland (southwestern) | |
| KALFELLSHRAUN | Crater Row of REYKJANES | Iceland (southwestern) | |
| KALFSHOLAR | Crater Row of GRIMSNES | Iceland (southwestern) | |
| KALGNITUNUP | Stratovolcano of KEBENEY | Kamchatka Peninsula | |
| KALIKIIR | Crater of SIRUNG | Lesser Sunda Islands | |
| KALIU | Cone of KILAUEA | Hawaiian Islands | |
| KALNANG'I SPRINGS | Thermal Feature of SILALI | Africa (eastern) | |
| KALOLENYANG | Shield volcano of BARRIER, THE | Africa (eastern) | |
| KALUAIKI | Cone of HALEAKALA | Hawaiian Islands | |
| KALUBU CRATER [DORO API] | Cone of SANGEANG API | Lesser Sunda Islands | |
| KALUU O KA OO | Cone of HALEAKALA | Hawaiian Islands | |
| KALYANGO | Tuff cone of FORT PORTAL | Africa (central) | |
| KAMA-YAMA | Pyroclastic Cone of ASAMA | Honshu | |
| KAMABUSE-YAMA | Dome of OSORE-YAMA | Honshu | |
| KAMADO-JIGOKU | Thermal Feature of TSURUMI | Ryukyu Islands & Kyushu | |
| KAMAFUSE-YAMA | Synonym of OSORE-YAMA | Honshu | |
| KAMAKAIA | Shield volcano of KILAUEA | Hawaiian Islands | |
| KAMAKAIAUKA | Cone of KILAUEA | Hawaiian Islands | |
| KAMAKAIAWAENA | Cone of KILAUEA | Hawaiian Islands | |
| KAMANE | Maar of MIYAKE-JIMA | Izu, Volcano, & Mariana Islands | |
| KAMAOLI | Cone of HALEAKALA | Hawaiian Islands | |
| KAMARI | Pleistocene caldera of KOS | Greece | |
| KAMBALNAIA, SOPKA | Synonym of KAMBALNY | Kamchatka Peninsula | |
| KAMBALNY | Stratovolcano | Historical | Kamchatka Peninsula |
| KAMCHATKA PEAK | Synonym of BAKENING | Kamchatka Peninsula | |
| KAMCHATSKAIA GORA | Synonym of KLIUCHEVSKOI | Kamchatka Peninsula | |
| KAMCHATSKY VULKAN | Synonym of KLIUCHEVSKOI | Kamchatka Peninsula | |
| KAMEGA-IKE | Crater of NORIKURA | Honshu | |
| KAMEGA-IKE | Crater of NORIKURA | Honshu | |
| KAMEGAWA | Thermal Feature of TSURUMI | Ryukyu Islands & Kyushu | |
| KAMEHAME HILL | Cone of KILAUEA | Hawaiian Islands | |
| KAMEN | Stratovolcano | Holocene | Kamchatka Peninsula |
| KAMENAE | Dome of SANTORINI | Greece | |
| KAMENI [KAMENO VOUNO] | Dome of METHANA | Greece | |
| KAMENISTAYA | Cone of KSUDACH | Kamchatka Peninsula | |
| KAMENISTAYA | Cinder cone of TOLBACHIK | Kamchatka Peninsula | |
| KAMENO VOUNO | Dome of METHANA | Greece | |
| KAMERUNGEBIRGE | Synonym of CAMEROON | Africa (western) | |
| KAMI-HOROKAMETTOKU-YAMA | Stratovolcano of TOKACHI | Hokkaido | |
| KAMI-YAMA | Dome of HAKONE | Honshu | |
| KAMI-YUZAWA | Dome of KUJU | Ryukyu Islands & Kyushu | |
| KAMIBORI | Crater of YAKE-DAKE | Honshu | |
| KAMIJI-YAMA | Synonym of FUJI | Honshu | |
| KAMINAKIA | Vent of NISYROS | Greece | |
| KAMMOURTA | Cone of MANDA-INAKIR | Africa (northeastern) & Red Sea | |
| KAMOAMOA, PUU | Cone of KILAUEA | Hawaiian Islands | |
| KAMODJAN (KAMOJAN) | Synonym of KAMOJANG, KAWAH | Java | |
| KAMOJANG, KAWAH | Stratovolcanoes | Pleistocene-Fumarolic | Java |
| KAMOSHIKA | Thermal Feature of ZAO | Honshu | |
| KAMTSCHATSKAJA | Synonym of KLIUCHEVSKOI | Kamchatka Peninsula | |
| KAMUI | Cone of DEMON | Kuril Islands | |
| KAMUINUPURI | Stratovolcano of MASHU | Hokkaido | |
| KAMUISHI | Dome of MASHU | Hokkaido | |
| KAMUISHUTO [KAMUISHI] | Dome of MASHU | Hokkaido | |
| KAMUISSYUTO [KAMUISHI] | Dome of MASHU | Hokkaido | |
| KAMUNZUKWA | Crater of BUNYARUGURU | Africa (central) | |
| KANA | Cone of EDZIZA | Canada | |
| KANA KEOKI | Submarine volcano | Holocene | Bougainville & Solomon Islands |
| KANAGA | Stratovolcano | Historical | Aleutian Islands |
| KANAGIOI | Stratovolcano of KARKAR | Northeast of New Guinea | |
| KANAKALEONUI, PUU | Cone of MAUNA KEA | Hawaiian Islands | |
| KANAKANA | Dome of OKATAINA | New Zealand | |
| KANAMHARAGI | Cone of NYAMURAGIRA | Africa (central) | |
| KANASO | Maar of MIYAKE-JIMA | Izu, Volcano, & Mariana Islands | |
| KANATON | Pleistocene caldera of KANAGA | Aleutian Islands | |
| KANAVA | Thermal Feature of MILOS | Greece | |
| KANDIDUSHKA | Cinder cone of VITIM PLATEAU | Russia (southeastern) | |
| KANDO-YAMA | Crater of HACHIJO-JIMA | Izu, Volcano, & Mariana Islands | |
| KANE NUI O HAMO | Shield volcano of KILAUEA | Hawaiian Islands | |
| KANEDA | Dome of OMANAGO GROUP | Honshu | |
| KANGAROO HILL | Cone of NEWER VOLCANICS PROV | Australia | |
| KANGIRINYANG | Maar of EMURUANGOGOLAK | Africa (eastern) | |
| KANI-NUMA | Crater of AKITA-YAKE-YAMA | Honshu | |
| KANLAON | Stratovolcano | Historical | Central Philippines |
| KANNAWA-JIGOKU | Thermal Feature of TSURUMI | Ryukyu Islands & Kyushu | |
| KANNON-MORI | Cone of CHOKAI | Honshu | |
| KANNONE KAIKYU | Submarine vent of YOKOATE-JIMA | Ryukyu Islands & Kyushu | |
| KANNONE-JIMA | Cone of YOKOATE-JIMA | Ryukyu Islands & Kyushu | |
| KANNONYAMA-HIGASHI | Cone of IZU-TOBU | Honshu | |
| KANPO-DAKE | Cinder cone of OSHIMA-OSHIMA | Hokkaido | |
| KANPU | Stratovolcano | Radiocarbon | Honshu |
| KANSU-YAMA | Cone of FUJI | Honshu | |
| KANYAMBUZI | Cone of NYIRAGONGO | Africa (central) | |
| KANYMAGASHU | Cone of NYIRAGONGO | Africa (central) | |
| KAO | Stratovolcano | Holocene | Tonga Islands |
| KAOLKHON | Synonym of ICHINSKY | Kamchatka Peninsula | |
| KAPAYAHAN | Crater of PACO | Mindanao | |
| KAPBERG | Stratovolcano of LOLO | New Britain | |
| KAPEDO HOT SPRINGS | Thermal Feature of SILALI | Africa (eastern) | |
| KAPELLUGIGAR | Crater Row of KRISUVIK | Iceland (southwestern) | |
| KAPI FUMAROLE FIELD | Thermal Feature of KEMBAR | Sumatra | |
| KAPKAI | Thermal Feature of AMBITLE | New Ireland | |
| KAPOHO | Tuff cone of KILAUEA | Hawaiian Islands | |
| KAPOR, PITON | Fissure vent of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| KAPUNDAN | See proper name (e.g. BONGSU, KAPUNDAN) | Indonesian for CRATER | |
| KAPUSIKEJU | Cone of EMURUANGOGOLAK | Africa (eastern) | |
| KAR, LAS | Synonym of LASCAR | Northern Chile, Bolivia & Argentina | |
| KARA DIVLIT TEPE | Cinder cone of KULA | Turkey | |
| KARA-GAMA | Crater of KUSATSU-SHIRANE | Honshu | |
| KARA-YAMA | Stratovolcano of IBUSUKI VOLCANIC FIELD | Ryukyu Islands & Kyushu | |
| KARABUKI | Thermal Feature of KUSATSU-SHIRANE | Honshu | |
| KARACA DAG | Shield volcano | Holocene | Turkey |
| KARACALIDAG | Synonym of KARACA DAG | Turkey | |
| KARAGULU TEPE | Dome of ERCIYES DAGI | Turkey | |
| KARAHA, KAWAH | Fumarole field | Fumarolic | Java |
| KARAI, MOUNT [RUCKENBERG] | Dome of SULU RANGE | New Britain | |
| KARAKULI | Dome of DIKY GREBEN | Kamchatka Peninsula | |
| KARAKUNI-DAKE | Stratovolcano of KIRISHIMA | Ryukyu Islands & Kyushu | |
| KARAMA | Cone of NYAMBENI HILLS | Africa (eastern) | |
| KARAN | Dome of SHIVELUCH | Kamchatka Peninsula | |
| KARANG | Stratovolcano | Holocene? | Java |
| KARANGETANG [API SIAU] | Stratovolcano | Historical | Sangihe Islands |
| KARAPETIANA [UOCHTEPEH] | Pyroclastic Cone of GHEGAM RIDGE | Caucasus, Georgia & Armenia | |
| KARAPINAR FIELD | Cinder cones | Holocene | Turkey |
| KARAPITI [CRATERS OF THE MOON] | Thermal Feature of MAROA | New Zealand | |
| KARASIVRI TEPE | Cone of ERCIYES DAGI | Turkey | |
| KARATALA | Synonym of KARTHALA | Indian Ocean (western) | |
| KARAVIA BAY | Stratovolcano of RABAUL | New Britain | |
| KARAVIOTIS | Dome of NISYROS | Greece | |
| KARE-NUMA | Crater of AKITA-YAKE-YAMA | Honshu | |
| KARIANG | Stratovolcano of DUKONO | Halmahera | |
| KARIMKOTAN | Synonym of KHARIMKOTAN | Kuril Islands | |
| KARIMSKY | Synonym of KARYMSKY | Kamchatka Peninsula | |
| KARISIMBI | Stratovolcano | Potassium-Argon | Africa (central) |
| KARITA-DAKE | Synonym of ZAO | Honshu | |
| KARIYA | Crater of BUNYARUGURU | Africa (central) | |
| KARKAR | Stratovolcano | Historical | Northeast of New Guinea |
| KARNIYARIK | Dome of ACIGOL-NEVSEHIR | Turkey | |
| KARNIYARIK | Cone of ARARAT | Turkey | |
| KARNIYARIK TEPELER | Cone of ERCIYES DAGI | Turkey | |
| KAROLERO | Crater of BUNYARUGURU | Africa (central) | |
| KARPINSKII | Synonym of KARPINSKY GROUP | Kuril Islands | |
| KARPINSKIY | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| KARPINSKY GROUP | Cones | Historical | Kuril Islands |
| KARS PLATEAU | Volcanic field | Holocene? | Turkey |
| KARSA KILE | Maar of MARSABIT | Africa (eastern) | |
| KARSO, KAWAH | Thermal Feature of GALUNGGUNG | Java | |
| KARTALA | Synonym of KARTHALA | Indian Ocean (western) | |
| KARTHALA | Shield volcano | Historical | Indian Ocean (western) |
| KARTIN DAG | Dome of ERCIYES DAGI | Turkey | |
| KARTOLA | Synonym of KARTHALA | Indian Ocean (western) | |
| KARUA | Submarine vent of KUWAE | Vanuatu | |
| KARYMSKAIA SOPKA | Synonym of KARYMSKY | Kamchatka Peninsula | |
| KARYMSKAYA RIVER SPRINGS | Thermal Feature of AKADEMIA NAUK | Kamchatka Peninsula | |
| KARYMSKOE, LAKE | Synonym of AKADEMIA NAUK | Kamchatka Peninsula | |
| KARYMSKY | Maar of AKADEMIA NAUK | Kamchatka Peninsula | |
| KARYMSKY | Stratovolcano | Historical | Kamchatka Peninsula |
| KARYMSKY LAKE | Pleistocene caldera of AKADEMIA NAUK | Kamchatka Peninsula | |
| KARYMSKY LAKE | Pleistocene caldera of AKADEMIA NAUK | Kamchatka Peninsula | |
| KARYMSKY SPRINGS | Thermal Feature of KARYMSKY | Kamchatka Peninsula | |
| KASA-YAMA | Cinder cone of ABU | Honshu | |
| KASAGA-TAKE | Shield volcano of SHIGA | Honshu | |
| KASAKAT HILL | Cone of PAKA | Africa (eastern) | |
| KASATOCHI | Stratovolcano | Historical | Aleutian Islands |
| KASBEK | Stratovolcano | Tephrochronology | Caucasus, Georgia & Armenia |
| KASEGA-DAKE | Dome of IBUSUKI VOLCANIC FIELD | Ryukyu Islands & Kyushu | |
| KASEKERE | Tuff cone of FORT PORTAL | Africa (central) | |
| KASENYI | Tuff cone of KATWE-KIKORONGO | Africa (central) | |
| KASHAKA | Cone of NYIRAGONGO | Africa (central) | |
| KASHI-MINE | Stratovolcano of KUCHINOERABU-JIMA | Ryukyu Islands & Kyushu | |
| KASIBOI | Cone of MAHAGNAO | Central Philippines | |
| KASIDIA | Crater of BUNYARUGURU | Africa (central) | |
| KASOLALI | Thermal Feature of PAGO | New Britain | |
| KASSHI-ASAHI-DAKE | Stratovolcano of NASU | Honshu | |
| KASSIGIE [KASSIJIE] | Cone of ITASY VOLCANIC FIELD | Indian Ocean (western) | |
| KASSIJIE | Cone of ITASY VOLCANIC FIELD | Indian Ocean (western) | |
| KASTANAS | Thermal Feature of MILOS | Greece | |
| KASTRIULYA | Shield volcano of ZAOZERNY | Kamchatka Peninsula | |
| KASUGA | Submarine volcano | Historical | Izu, Volcano, & Mariana Islands |
| KASUGA 1 | Synonym of KASUGA | Izu, Volcano, & Mariana Islands | |
| KASUGA 2 | Synonym of MINAMI KASUGA | Izu, Volcano, & Mariana Islands | |
| KASUGA-KAIZAN | Synonym of KASUGA | Izu, Volcano, & Mariana Islands | |
| KASUGA-MINAMINOBA | Synonym of MINAMI KASUGA | Izu, Volcano, & Mariana Islands | |
| KASUGABA | Synonym of KASUGA | Izu, Volcano, & Mariana Islands | |
| KATABUTA-YAMA N | Cone of FUJI | Honshu | |
| KATABUTA-YAMA S | Cone of FUJI | Honshu | |
| KATAKURA-YAMA | Cone of AKITA-KOMAGA-TAKE | Honshu | |
| KATALIM | Cone of PAKA | Africa (eastern) | |
| KATANUMA | Crater of NARUGO | Honshu | |
| KATASU HILL | Cone of MILBANKE SOUND GROUP | Canada | |
| KATINDA | Crater of BUNYARUGURU | Africa (central) | |
| KATKATKONO | Crater of MEIDOB VOLCANIC FIELD | Africa (northern) | |
| KATLA | Subglacial volcano | Historical | Iceland (southern) |
| KATLAR | Crater Row of KRISUVIK | Iceland (southwestern) | |
| KATLOGIAA | Synonym of KATLA | Iceland (southern) | |
| KATMAI | Stratovolcano | Historical | Alaska Peninsula |
| KATT, CUDDIA DEL | Cone of PANTELLERIA | Italy | |
| KATTA-DAKE | Dome of ZAO | Honshu | |
| KATUBA | Crater of BUNYARUGURU | Africa (central) | |
| KATUBUI | Crater of KIEYO | Africa (eastern) | |
| KATUMBUAN | Dome of LEONARD RANGE | Mindanao | |
| KATUNGA | Tuff cone | Holocene | Africa (central) |
| KATWE | Tuff cone of KATWE-KIKORONGO | Africa (central) | |
| KATWE-KIKORONGO | Tuff cones | Holocene | Africa (central) |
| KAUFFMAN VOLCANO | Shield volcano of ANDRUS | Antarctica & South Sandwich Islands | |
| KAUKA, PUU | Cone of KILAUEA | Hawaiian Islands | |
| KAULET EL-HAURI | Crater of ARHAB, HARRA OF | Arabia | |
| KAULET HATTAB | Tuff cone of ARHAB, HARRA OF | Arabia | |
| KAUMUKI | Cone of KILAUEA | Hawaiian Islands | |
| KAUPULEHU | Cone of HUALALAI | Hawaiian Islands | |
| KAVACHI | Submarine volcano | Historical | Bougainville & Solomon Islands |
| KAVAKLIDAG | Dome of ERCIYES DAGI | Turkey | |
| KAVETERANG | Tuff ring of SILALI | Africa (eastern) | |
| KAWA | Synonym of CAGUA | Luzon | |
| KAWAGODAIRA | Maar of IZU-TOBU | Honshu | |
| KAWAH | See proper name (e.g. BARU, KAWAH) | Indonesian for CRATER | |
| KAWAHKAMOJANG | Synonym of KAMOJANG, KAWAH | Java | |
| KAWAHKARAHA | Synonym of KARAHA, KAWAH | Java | |
| KAWAK BUTTE | Cone of NEWBERRY | USA (Oregon) | |
| KAWANA-MINAMI | Cone of IZU-TOBU | Honshu | |
| KAWAYU-IWO-ZAN [ATOSANUPURI] | Dome of KUTCHARO | Hokkaido | |
| KAWERAU | Thermal Feature of OKATAINA | New Zealand | |
| KAWI-BUTAK | Stratovolcanoes | Holocene | Java |
| KAWITI | Cone of KAIKOHE-BAY OF ISLANDS | New Zealand | |
| KAYABENOBORI | Synonym of KOMAGA-TAKE | Hokkaido | |
| KAYALITEPE | Cone of NEMRUT DAGI | Turkey | |
| KAZAANA | Dome of UNZEN | Ryukyu Islands & Kyushu | |
| KAZAHAYA | Fissure vent of MIYAKE-JIMA | Izu, Volcano, & Mariana Islands | |
| KAZBEK | Synonym of KASBEK | Caucasus, Georgia & Armenia | |
| KEALAALEA HILLS | Shield volcano of KILAUEA | Hawaiian Islands | |
| KEANAKAKOI | Pit crater of KILAUEA | Hawaiian Islands | |
| KEBENEI | Synonym of KEBENEY | Kamchatka Peninsula | |
| KEBENEY | Shield volcano | Holocene? | Kamchatka Peninsula |
| KEBONGO | Cone of KOROSI | Africa (eastern) | |
| KEBRIT ALE | Synonym of GADA ALE | Africa (northeastern) & Red Sea | |
| KEBUN BUNGO | Crater of MARAPI | Sumatra | |
| KECHII [KURAISWA] | Vent of KOROSI | Africa (eastern) | |
| KECHUCAVI OF MOLINA | Synonym of MINCHINMAVIDA | Southern Chile & Argentina | |
| KECIL, DANAU | Crater of TALANG | Sumatra | |
| KECIL, KABA [BARU, KABA] | Crater of KABA | Sumatra | |
| KECIRI, GUNUNG | Pleistocene caldera of TENGGER CALDERA | Java | |
| KEFELI | Cone of ERCIYES DAGI | Turkey | |
| KEFENLI TEPE | Cone of ERCIYES DAGI | Turkey | |
| KEIGETSU-DAKE | Dome of DAISETSU | Hokkaido | |
| KEIGETU-DAKE [KEIGETSU-DAKE] | Dome of DAISETSU | Hokkaido | |
| KEILAMBETE, LAKE | Maar of NEWER VOLCANICS PROV | Australia | |
| KEIZUKA-YAMA | Shield volcano of NIKKO-SHIRANE | Honshu | |
| KEKAU, GUNUNG [BUKIT MELAYU] | Cone of GAMALAMA | Halmahera | |
| KEKEP, GUNUNG | Cone of SUNDORO | Java | |
| KEKEXILI | Caldera of UNNAMED | China (western) | |
| KEKUK CRATER | Crater of BOLSHOI-KEKUKNAYSKY | Kamchatka Peninsula | |
| KEKUKNAYSKY | Shield volcano of BOLSHOI-KEKUKNAYSKY | Kamchatka Peninsula | |
| KEKURNY | Shield volcanoes | Holocene? | Kamchatka Peninsula |
| KELAKIRANA TEPE | Cone of NEMRUT DAGI | Turkey | |
| KELALANG | Cone of KEMBAR | Sumatra | |
| KELANG, MT. | Cone of KLABAT | Sulawesi | |
| KELBEY'S RIDGE | Dome of SABA | West Indies | |
| KELBEY'S RIDGE | Dome of SABA | West Indies | |
| KELIBARA | Cone of KELIMUTU | Lesser Sunda Islands | |
| KELIDO | Cone of KELIMUTU | Lesser Sunda Islands | |
| KELIMUTU | Complex volcano | Historical | Lesser Sunda Islands |
| KELL | Stratovolcanoes | Holocene | Kamchatka Peninsula |
| KELL | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| KELLY BUTTE | Cone of NEWBERRY | USA (Oregon) | |
| KELLYA | Synonym of KELL | Kamchatka Peninsula | |
| KELOET (KELUIT) | Synonym of KELUT | Java | |
| KELSAY POINT | Cinder cone of CINNAMON BUTTE | USA (Oregon) | |
| K'ELT'AENI | Synonym of WRANGELL | Alaska (eastern) | |
| KELUD (KELOED) | Synonym of KELUT | Java | |
| KELUO GROUP | Pyroclastic cones | Holocene | China (eastern) |
| KELUONANSHAN [NANSHAN] | Cinder cone of KELUO GROUP | China (eastern) | |
| KELUT | Stratovolcano | Historical | Java |
| KEMBANG, GUNUNG | Cone of SLAMET | Java | |
| KEMBANG, GUNUNG | Cone of SUNDORO | Java | |
| KEMBAR | Shield volcano | Pleistocene-Fumarolic | Sumatra |
| KEMBAR NORTH | Cone of ARJUNO-WELIRANG | Java | |
| KEMBAR SOUTH | Cone of ARJUNO-WELIRANG | Java | |
| KEMBAR, GUNUNG | Cone of ARJUNO-WELIRANG | Java | |
| KEMMERLING | Crater of SEMERU | Java | |
| KEMOENTJOEP, GUNUNG [GUNUNG KEMUNCUP] | Dome of PENANGGUNGAN | Java | |
| KEMULAN | Stratovolcano of DIENG VOLCANIC COMPLEX | Java | |
| KEMUNCUP, GUNUNG | Dome of PENANGGUNGAN | Java | |
| KENA | Cone of EDZIZA | Canada | |
| KENDALISODO, GUNUNG | Cone of UNGARAN | Java | |
| KENDANG | Stratovolcano | Holocene | Java |
| KENDENG | Synonym of KENDANG | Java | |
| KENDENG | Caldera of IJEN | Java | |
| KENDIL | Dome of DIENG VOLCANIC COMPLEX | Java | |
| KENDIL, GUNUNG | Cone of TELOMOYO | Java | |
| KENFIELD NUNATAK | Cone of HUDSON MOUNTAINS | Antarctica & South Sandwich Islands | |
| KENGA-MINE | Cone of AKAN | Hokkaido | |
| KENGAMINE | Dome of HAKU-SAN | Honshu | |
| KENNEDY HOT SPRINGS | Thermal Feature of GLACIER PEAK | USA (Washington) | |
| KENT CRATER | Tuff cone of PRINCE EDWARD ISLAND | Indian Ocean (southern) | |
| KENTON, CERRO | Cinder cone of SAN QUINTIN VOLCANIC FIELD | México | |
| KENZE | Cone of CHYULU HILLS | Africa (eastern) | |
| KEO PEAK | Synonym of EBULOBO | Lesser Sunda Islands | |
| KEONEHUNEHUNE | Cone of HALEAKALA | Hawaiian Islands | |
| KEONENELU | Cone of HALEAKALA | Hawaiian Islands | |
| KEPALA, GUNUNG [GUNUNG KEPOLO] | Stratovolcano of SEMERU | Java | |
| KEPEZ TEPE | Dome of ERCIYES DAGI | Turkey | |
| KEPOLO, GUNUNG | Stratovolcano of SEMERU | Java | |
| KEPUNDAN | See proper name (e.g. TUO, KEPUNDAN) | Indonesian for CRATER | |
| KERAMAT, BUKIT | Cone of GAMALAMA | Halmahera | |
| KERAROA | Synonym of VICTORY | New Guinea & D'Entrecasteaux Islands | |
| KERAVIA [VULCAN] | Pumice cone of RABAUL | New Britain | |
| KEREKERE, VUTI | Cone of AOBA | Vanuatu | |
| KEREM | Cone of ERCIYES DAGI | Turkey | |
| KERGUELEN ISLANDS | Stratovolcanoes | Holocene? | Indian Ocean (southern) |
| KERHOLL | Crater of GRIMSNES | Iceland (southwestern) | |
| KERI | Cone of KAIKOHE-BAY OF ISLANDS | New Zealand | |
| KERID | Maar of GRIMSNES | Iceland (southwestern) | |
| KERINCI | Stratovolcano | Historical | Sumatra |
| KERINTJI | Synonym of KERINCI | Sumatra | |
| KERKORUMIKSI TEPE | Cone of NEMRUT DAGI | Turkey | |
| KERKUR | Dome of NEMRUT DAGI | Turkey | |
| KERLINGARDYNGA | Shield volcano of FREMRINAMUR | Iceland (northeastern) | |
| KERLINGARFJOLL | Stratovolcano | Holocene | Iceland (southwestern) |
| KERLINGARHOLAR | Fissure vent of KRAFLA | Iceland (northeastern) | |
| KERLINGARHOLL | Crater Row of GRIMSNES | Iceland (southwestern) | |
| KERUAR | Synonym of KADOVAR | Northeast of New Guinea | |
| KETEN | Synonym of MOTI | Halmahera | |
| KETETAHI | Thermal Feature of TONGARIRO | New Zealand | |
| KETIL [KETILDYNGJA] | Shield volcano of FREMRINAMUR | Iceland (northeastern) | |
| KETILDYNGJA | Shield volcano of FREMRINAMUR | Iceland (northeastern) | |
| KETJIL, DANAU [DANAU KECIL] | Crater of TALANG | Sumatra | |
| KETJIL, KABA [BARU, KABA] | Crater of KABA | Sumatra | |
| KETO KETO, MAUNGA | Pyroclastic Cone of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| KETOI | Stratovolcano | Historical | Kuril Islands |
| KETOI-JIMA (KETOY) | Synonym of KETOI | Kuril Islands | |
| KETREDEGUIN | Synonym of LONQUIMAY | Central Chile & Argentina | |
| KETRUDEHUIN | Synonym of CALLAQUI | Central Chile & Argentina | |
| KEVENEYTUNUP | Shield volcano of BELY | Kamchatka Peninsula | |
| KEYHOLE EXPLOSION CRATER | Crater of DIAMOND CRATERS | USA (Oregon) | |
| KEYOCC, CERRO | Cinder cone of HUAMBO | Perú | |
| KHADUTKA | Synonym of KHODUTKA | Kamchatka Peninsula | |
| KHAGGIAR | Dome of PANTELLERIA | Italy | |
| KHAGINAK ? | Synonym of ROUNDTOP | Aleutian Islands | |
| KHAIBAR, HARRAT EL- | Synonym of KHAYBAR, HARRAT | Arabia | |
| KHAIBER, HARRAT EL- | Synonym of KHAYBAR, HARRAT | Arabia | |
| KHALA [PECHAN] | Cone of TIANSHAN VOLCANIC GROUP | China (western) | |
| KHAMCHENSKAYA, SOPKA | Synonym of GAMCHEN | Kamchatka Peninsula | |
| KHAMMA, CUDDIA | Shield volcano of PANTELLERIA | Italy | |
| KHAMSARA-BIYKHEM PLATEAU | Synonym of AZAS PLATEAU | Russia (southeastern) | |
| KHAMSARA-BOL'SHOI YENISEI | Synonym of AZAS PLATEAU | Russia (southeastern) | |
| KHANGAR | Stratovolcano | Radiocarbon | Kamchatka Peninsula |
| KHANGURA | Cone of UDOKAN PLATEAU | Russia (southeastern) | |
| KHANUY GOL | Volcanic field | Holocene | Mongolia |
| KHARA-BOLDOK | Cone of TUNKIN DEPRESSION | Russia (southeastern) | |
| KHARIMKOTAN | Stratovolcano | Historical | Kuril Islands |
| KHARTIBUCALE | Cone of PANTELLERIA | Italy | |
| KHAYBAR, HARRAT | Volcanic field | Historical | Arabia |
| KHAYNANJ | Synonym of HAINAN DAO | Southeast Asia | |
| KHEBRIT, DJEBEL | Synonym of TAIR, JEBEL AT | Africa (northeastern) & Red Sea | |
| KHETIK | Shield volcano of OSTANETS | Kamchatka Peninsula | |
| KHOASHEN | Synonym of ICHINSKY | Kamchatka Peninsula | |
| KHOBOK GROUP | Cone of TUNKIN DEPRESSION | Russia (southeastern) | |
| KHODUKTA SPRINGS | Thermal Feature of KHODUTKA | Kamchatka Peninsula | |
| KHODUTKA | Stratovolcanoes | Radiocarbon | Kamchatka Peninsula |
| KHODUTKINSKY | Maar of KHODUTKA | Kamchatka Peninsula | |
| KHOIOKHONGEN | Synonym of KHODUTKA | Kamchatka Peninsula | |
| KHONARASSAR | Cone of PORAK | Caucasus, Georgia & Armenia | |
| KHOROG | Cinder cone of TARYATU-CHULUTU | Mongolia | |
| KHURDJ EL-AISAR | Tuff cone of HAYLAN, JABAL | Arabia | |
| KHUTSI | Synonym of FUJI | Honshu | |
| KIALAGVIK | Stratovolcano | Holocene | Alaska Peninsula |
| KIAMIS, GUNUNG | Dome of KENDANG | Java | |
| KIAPU | Cone of KILAUEA | Hawaiian Islands | |
| KIARABERES | Crater of PERBAKTI-GAGAK | Java | |
| KIBATI | Cone of NYIRAGONGO | Africa (central) | |
| KIBITHEWA | Pyroclastic Cone of NYAMBENI HILLS | Africa (eastern) | |
| KIBO | Stratovolcano of KILIMANJARO | Africa (eastern) | |
| KIBONGOTO | Cone of KILIMANJARO | Africa (eastern) | |
| KIBREALE | Synonym of GADA ALE | Africa (northeastern) & Red Sea | |
| KICHPINITSCH | Synonym of KIKHPINYCH | Kamchatka Peninsula | |
| KICHWAMBE VOLC FIELD | Synonym of BUNYARUGURU | Africa (central) | |
| KICK 'EM JACK | Submarine vent of KICK 'EM JENNY | West Indies | |
| KICK 'EM JENNY | Submarine volcano | Historical | West Indies |
| KICKER ROCK | Tuff cone of SAN CRISTOBAL | Galápagos Islands | |
| KIE BESI | Synonym of MAKIAN | Halmahera | |
| KIEMATABU, BUKIT | Stratovolcano of TIDORE | Halmahera | |
| KIEYO | Stratovolcano | Historical | Africa (eastern) |
| KIEZU-IKE | Crater of NORIKURA | Honshu | |
| KIGALGIN | Synonym of CARLISLE | Aleutian Islands | |
| KIGAMIL (KIGAMILJACH) | Synonym of KAGAMIL | Aleutian Islands | |
| KIGERE | Tuff cone of FORT PORTAL | Africa (central) | |
| KIGEZI | Crater of BUNYARUGURU | Africa (central) | |
| KIGUGA WARM SPRINGS | Thermal Feature of MOFFETT | Aleutian Islands | |
| KIJONGO KALEMA | Tuff cone of FORT PORTAL | Africa (central) | |
| KIJONGO KATABYIRE | Tuff cone of FORT PORTAL | Africa (central) | |
| KIKAI | Caldera | Historical | Ryukyu Islands & Kyushu |
| KIKAIGA-SHIMA | Synonym of KIKAI | Ryukyu Islands & Kyushu | |
| KIKDOOLI BUTTE | Cone of NUNIVAK ISLAND | Alaska (western) | |
| KIKHPINYCH | Synonym of BOLSHOI SEMIACHIK | Kamchatka Peninsula | |
| KIKHPINYCH | Stratovolcanoes | Radiocarbon | Kamchatka Peninsula |
| KIKIKYAK HILL | Cone of NUNIVAK ISLAND | Alaska (western) | |
| KIKOMBE | Cone of KARISIMBI | Africa (central) | |
| KIKORONGO | Tuff cone of KATWE-KIKORONGO | Africa (central) | |
| KILAUEA | Shield volcano | Historical | Hawaiian Islands |
| KILAUEA | Shield volcano | Historical | Hawaiian Islands |
| KILAUEA IKI | Pit crater of KILAUEA | Hawaiian Islands | |
| KILEMA | Cone of KILIMANJARO | Africa (eastern) | |
| KILEO | Cone of KILIMANJARO | Africa (eastern) | |
| KILIAN CRATERE | Dome of CHAINE DES PUYS | Western Europe | |
| KILIMA DSCHARO (KILIMA NJARO) | Synonym of KILIMANJARO | Africa (eastern) | |
| KILIMANDJARO | Synonym of KILIMANJARO | Africa (eastern) | |
| KILIMANJARO | Stratovolcano | Holocene | Africa (eastern) |
| KILOLE | Tuff ring of BISHOFTU VOLCANIC FIELD | Africa (northeastern) & Red Sea | |
| KIMANURA | Cone of NYAMURAGIRA | Africa (central) | |
| KIMEN-ZAN | Dome of ADATARA | Honshu | |
| KIMERA | Cone of NYAMURAGIRA | Africa (central) | |
| KIMIJOOKSUK BUTTE | Cone of NUNIVAK ISLAND | Alaska (western) | |
| KIMIKSTHEK HILL | Cone of NUNIVAK ISLAND | Alaska (western) | |
| KIMIKTHAK HILLS | Cone of NUNIVAK ISLAND | Alaska (western) | |
| KIMILOS | Cone of MILOS | Greece | |
| KIMSACHATA | Synonym of QUIMSACHATA | Perú | |
| KINAMI | Stratovolcano of LIHIR | New Ireland | |
| KINANGA | Cone of KILIMANJARO | Africa (eastern) | |
| KINENIN | Maar | Radiocarbon | Kamchatka Peninsula |
| KING CREEK | Cone of ISKUT-UNUK RIVER CONES | Canada | |
| KING MOUNTAIN FISSURE | Fissure vent of ADAMS | USA (Washington) | |
| KINGIRI | Maar of KIEYO | Africa (eastern) | |
| KING'S BOWL RIFT | Fissure vent of WAPI LAVA FIELD | USA (Idaho) | |
| KINIHA | Cone of NYIRAGONGO | Africa (central) | |
| KINO CRATER | Maar of PINACATE | México | |
| KINUGASA | Stratovolcano of UNZEN | Ryukyu Islands & Kyushu | |
| KINYACH [GETANG] | Crater of KOROSI | Africa (eastern) | |
| KINYAMBATSHA | Cone of NYIRAGONGO | Africa (central) | |
| KINYAMUAGA | Cone of NYAMURAGIRA | Africa (central) | |
| KINYANGAKI | Cone of KARISIMBI | Africa (central) | |
| KIOGA | Cone of KIEYO | Africa (eastern) | |
| KIOLIK HILL | Cone of NUNIVAK ISLAND | Alaska (western) | |
| KIPUKA HILL | Cinder cone of TRISTAN DA CUNHA | Atlantic Ocean (southern) | |
| KIPYASCHEYE LAKE | Crater of GOLOVNIN | Kuril Islands | |
| KIPYASHCHAYA | Pleistocene caldera of BARANSKY | Kuril Islands | |
| KIRARO | Cone of NYAMBENI HILLS | Africa (eastern) | |
| KIRAUEA | Synonym of KILAUEA | Hawaiian Islands | |
| KIRCHWEILER | Maar of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| KIREREMA | Cone of KARISIMBI | Africa (central) | |
| KIREUNSKY | Cinder cone of ALNEY-CHASHAKONDZHA | Kamchatka Peninsula | |
| KIRGURICH | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| KIRIMA-ITUNE | Cone of NYAMBENI HILLS | Africa (eastern) | |
| KIRISHIMA | Shield volcano | Historical | Ryukyu Islands & Kyushu |
| KIRISIMA | Synonym of KIRISHIMA | Ryukyu Islands & Kyushu | |
| KIRKJUFELL | Tuya of TORFAJOKULL | Iceland (southern) | |
| KIRKJUFELL [ELDFELL] | Fissure vent of VESTMANNAEYJAR | Iceland (southern) | |
| KIRKOR DAGI [KERKUR] | Dome of NEMRUT DAGI | Turkey | |
| KIRMIZI TEPE | Cone of ERCIYES DAGI | Turkey | |
| KIRUNGA CHA NINA GONGO | Synonym of NYIRAGONGO | Africa (central) | |
| KIRUNGA I | Cone of NYIRAGONGO | Africa (central) | |
| KIRUNGA VISOKE | Synonym of VISOKE | Africa (central) | |
| KIRUNGE CHA NIRAGONGO | Synonym of NYIRAGONGO | Africa (central) | |
| KIRUNGE YA GONGO | Synonym of NYIRAGONGO | Africa (central) | |
| KIRUNGO CHA GONGO | Synonym of NYIRAGONGO | Africa (central) | |
| KIRUNGU TSCHA GONGO | Synonym of NYIRAGONGO | Africa (central) | |
| KIRUNGU TSCHA GONGWE | Synonym of NYIRAGONGO | Africa (central) | |
| KIRUTALE [KITUHARU] | Cone of NYAMURAGIRA | Africa (central) | |
| KISHB, HARRAT | Volcanic field | Holocene | Arabia |
| KISHIMA-DAKE | Stratovolcano of ASO | Ryukyu Islands & Kyushu | |
| KISKA | Stratovolcano | Historical | Aleutian Islands |
| KISLYI KLYUCH | Cone of UDOKAN PLATEAU | Russia (southeastern) | |
| KISO-ONTAKE | Synonym of ON-TAKE | Honshu | |
| KISSOBA | Crater of KIEYO | Africa (eastern) | |
| KISTA | Crater Row of BRENNISTEINSFJOLL | Iceland (southwestern) | |
| KISTUFELL | Fissure vent of BRENNISTEINSFJOLL | Iceland (southwestern) | |
| KISTUFELLSGJOSKA | Fissure vent of ASKJA | Iceland (northeastern) | |
| KISTUFELLSHRAUN | Crater Row of ASKJA | Iceland (northeastern) | |
| KITA IWO DAKE | Synonym of KUNTOMINTAR | Kuril Islands | |
| KITA YATSUGA-TAKE | Stratovolcanoes | Radiocarbon | Honshu |
| KITA-BAYONNAISE | Synonym of MYOJIN KNOLL | Izu, Volcano, & Mariana Islands | |
| KITA-CHIRIPPU | Synonym of CHIRIP | Kuril Islands | |
| KITA-DAKE | Stratovolcano of SAKURA-JIMA | Ryukyu Islands & Kyushu | |
| KITA-DAKE | Crater of SHIRETOKO-IWO-ZAN | Hokkaido | |
| KITA-FUKUTOKUTAI | Submarine volcano | Historical | Izu, Volcano, & Mariana Islands |
| KITA-HIYOSHI | Submarine vent of MINAMI-HIYOSHI | Izu, Volcano, & Mariana Islands | |
| KITA-IWO-JIMA | Stratovolcano | Historical | Izu, Volcano, & Mariana Islands |
| KITA-KANSU-YAMA | Cone of FUJI | Honshu | |
| KITA-KORI-IKE | Vent of FUJI | Honshu | |
| KITA-SENRIGAHAMA | Crater of KUJU | Ryukyu Islands & Kyushu | |
| KITA-TIRIPPU | Synonym of CHIRIP | Kuril Islands | |
| KITA-YAMA | Stratovolcano of SHIKOTSU | Hokkaido | |
| KITA-YAMA | Cone of AKAN | Hokkaido | |
| KITA-YATSUGA-TAKE | Synonym of KITA YATSUGA-TAKE | Honshu | |
| KITA-YATUGA-TAKE | Synonym of KITA YATSUGA-TAKE | Honshu | |
| KITAGAWA | Thermal Feature of KUSATSU-SHIRANE | Honshu | |
| KITAIO | Synonym of KUNTOMINTAR | Kuril Islands | |
| KITANOHARA-HIGASHI | Maar of IZU-TOBU | Honshu | |
| KITAZUNGURWA | Cone of NYAMURAGIRA | Africa (central) | |
| KITEMA | Cone of KIEYO | Africa (eastern) | |
| KITHETU HILL | Pyroclastic Cone of NYAMBENI HILLS | Africa (eastern) | |
| KITIA | Dome of ITASY VOLCANIC FIELD | Indian Ocean (western) | |
| KITOMBOLD | Cone of ITASY VOLCANIC FIELD | Indian Ocean (western) | |
| KITSHIMBANY [KITSIMBANYI] | Cone of NYAMURAGIRA | Africa (central) | |
| KITSIMBANYI | Cone of NYAMURAGIRA | Africa (central) | |
| KITTIWAKE POND | Maar of BULDIR | Aleutian Islands | |
| KITUHARU | Cone of NYAMURAGIRA | Africa (central) | |
| KITURO [GITURO] | Cone of NYAMURAGIRA | Africa (central) | |
| KIVANDIMWE | Cone of NYAMURAGIRA | Africa (central) | |
| KIYOMI-DAKE | Dome of IBUSUKI VOLCANIC FIELD | Ryukyu Islands & Kyushu | |
| KIZDAGI | Dome of SUPHAN DAGI | Turkey | |
| KIZIL TEPE | Cone of ACIGOL-NEVSEHIR | Turkey | |
| KIZIL TEPE | Cinder cone of ERCIYES DAGI | Turkey | |
| KIZILKUYU TEPE | Cone of ERCIYES DAGI | Turkey | |
| KIZIMA-DAKE [KISHIMA-DAKE] | Stratovolcano of ASO | Ryukyu Islands & Kyushu | |
| KIZIMEN | Stratovolcano | Historical | Kamchatka Peninsula |
| KIZINEN | Synonym of KIZIMEN | Kamchatka Peninsula | |
| KJALHRAUN | Shield volcano of LANGJOKULL | Iceland (southwestern) | |
| KLABAT | Stratovolcano | Fumarolic | Sulawesi |
| KLAK BUTTE | Cinder cone of BACHELOR | USA (Oregon) | |
| KLAKAH, RANU | Maar of LAMONGAN | Java | |
| KLASTLINE | Cone of EDZIZA | Canada | |
| KLAWHOP BUTTE | Cinder cone of NEWBERRY | USA (Oregon) | |
| KLEINE SSEMJATSCHIK | Synonym of KARYMSKY | Kamchatka Peninsula | |
| KLESHNYA | Cinder cone of TOLBACHIK | Kamchatka Peninsula | |
| KLINKIT CREEK PEAK | Tuya of TUYA VOLCANIC FIELD | Canada | |
| KLINKIT LAKE VOLC FIELD | Volcanic field of TUYA VOLCANIC FIELD | Canada | |
| KLIUCHEF | Stratovolcano of ATKA | Aleutian Islands | |
| KLIUCHEVSKAIA SOPKA | Synonym of KLIUCHEVSKOI | Kamchatka Peninsula | |
| KLIUCHEVSKOI | Stratovolcano | Historical | Kamchatka Peninsula |
| KLIUCHEVSKOY [KLIUCHEF] | Stratovolcano of ATKA | Aleutian Islands | |
| KLJUTSCHEW | Synonym of KLIUCHEVSKOI | Kamchatka Peninsula | |
| KLJUTSCHEWSKAJA SSOPKA | Synonym of KLIUCHEVSKOI | Kamchatka Peninsula | |
| KLOET | Synonym of KELUT | Java | |
| KLOFNINGAHRAUN | Crater Row of REYKJANES | Iceland (southwestern) | |
| KLONE BUTTE | Cinder cone of NEWBERRY | USA (Oregon) | |
| KLUCHEV | Synonym of KLIUCHEVSKOI | Kamchatka Peninsula | |
| KLUTLAN GLACIER | Synonym of CHURCHILL | Alaska (eastern) | |
| KLYUCHGVSKAYA | Synonym of KLIUCHEVSKOI | Kamchatka Peninsula | |
| KM 14, CERRO | Cinder cone of NEJAPA-MIRAFLORES | Nicaragua | |
| KNAPPAFELLSJOKULL | Synonym of ORAEFAJOKULL | Iceland (southeastern) | |
| KNIAZEFF | Dome of LEONARD RANGE | Mindanao | |
| KNIAZEFF 2 | Dome of LEONARD RANGE | Mindanao | |
| KNIFE PEAK | Synonym of GRIGGS | Alaska Peninsula | |
| KO-ASAMA-YAMA | Dome of ASAMA | Honshu | |
| KO-ATOSANUPURI | Stratovolcano of KUTCHARO | Hokkaido | |
| KO-DAKE | Cone of AKITA-KOMAGA-TAKE | Honshu | |
| KO-FUJI | Stratovolcano of FUJI | Honshu | |
| KO-HIYOSHI | Submarine vent of MINAMI-HIYOSHI | Izu, Volcano, & Mariana Islands | |
| KO-JIMA | Stratovolcano of HACHIJO-JIMA | Izu, Volcano, & Mariana Islands | |
| K'O-LO-NAN-SHAN | Synonym of KELUO GROUP | China (eastern) | |
| KO-TOKACHI-DAKE | Stratovolcano of TOKACHI | Hokkaido | |
| KO-USU | Dome of USU | Hokkaido | |
| KO-YAMA [TAKA-YAMA] | Cone of AZUMA | Honshu | |
| KO-ZIMA [KO-JIMA] | Stratovolcano of HACHIJO-JIMA | Izu, Volcano, & Mariana Islands | |
| KOA | Thermal Feature of PALUWEH | Lesser Sunda Islands | |
| KOA [SOUTHERN DOME] | Dome of OKATAINA | New Zealand | |
| KOAE, PUU | Cone of KILAUEA | Hawaiian Islands | |
| KOANG, MT. | Cone of NEWER VOLCANICS PROV | Australia | |
| KOBANDAI | Stratovolcano of BANDAI | Honshu | |
| KOBE-YAMA | Dome of KOZU-SHIMA | Izu, Volcano, & Mariana Islands | |
| KOBU-YAMA | Cone of AKAN | Hokkaido | |
| KOCADAG TEPE | Dome of ACIGOL-NEVSEHIR | Turkey | |
| KOCATEPE [KOCADAG TEPE] | Dome of ACIGOL-NEVSEHIR | Turkey | |
| KOCDAGI | Stratovolcano of ERCIYES DAGI | Turkey | |
| KOCHER [HUOSHAOSHAN] | Cone of WUDALIANCHI | China (eastern) | |
| KOD ALI | Crater of DUBBI | Africa (northeastern) & Red Sea | |
| KODDA GINNI KOMA | Tuff cone of ARDOUKOBA | Africa (northeastern) & Red Sea | |
| KOE-KOE | Fissure vent of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| KOEKOESAN [KUKUSAN] | Cone of IJEN | Java | |
| KOENJIT | Synonym of KUNYIT | Sumatra | |
| KOERINCI (KOERINTJI) | Synonym of KERINCI | Sumatra | |
| KOERSI, GUNUNG [GUNUNG KURSI] | Cinder cone of TENGGER CALDERA | Java | |
| KOETLEGIAA | Synonym of KATLA | Iceland (southern) | |
| KOGAJA-JIMA | Lava domes | Holocene? | Ryukyu Islands & Kyushu |
| KOH-I BAZMAN | Synonym of BAZMAN | Iran & Afghanistan | |
| KOH-I TAFTAN | Synonym of TAFTAN | Iran & Afghanistan | |
| KOHUORA | Tuff cone of AUCKLAND FIELD | New Zealand | |
| KOIKE | Vent of IZU-TOBU | Honshu | |
| KOINAKA-YAMA | Synonym of FUJI | Honshu | |
| KOIZUMI-DAKE | Stratovolcano of DAISETSU | Hokkaido | |
| KOJIN-YAMA | Dome of CHOKAI | Honshu | |
| KOK-HEM | Shield volcano of AZAS PLATEAU | Russia (southeastern) | |
| KOK-HEMSKII [KOK-HEM] | Shield volcano of AZAS PLATEAU | Russia (southeastern) | |
| KOKHERA | Synonym of WUDALIANCHI | China (eastern) | |
| KOKKINO VOUNO | Cinder cone of SANTORINI | Greece | |
| KOKON | Synonym of NILA | Banda Sea | |
| KOKON-EMPUNG | Synonym of LOKON-EMPUNG | Sulawesi | |
| KOKOOLAU | Cone of KILAUEA | Hawaiian Islands | |
| KOKOR, WAI | Thermal Feature of POCO LEOK | Lesser Sunda Islands | |
| KOLANH DAG | Cone of ERCIYES DAGI | Turkey | |
| KOLANLI DAG | Dome of ERCIYES DAGI | Turkey | |
| KOLBEINSEY RIDGE | Submarine volcano | Historical | North of Iceland |
| KOLBO, GOF | Maar of MARSABIT | Africa (eastern) | |
| KOLCHON | Synonym of ICHINSKY | Kamchatka Peninsula | |
| KOLDUKVISLARHRAUN | Fissure vent of BARDARBUNGA | Iceland (northeastern) | |
| KOLE, PUU | Cone of MAUNA KEA | Hawaiian Islands | |
| KOLEKOLE | Cone of HALEAKALA | Hawaiian Islands | |
| KOLEKOLE, PUU | Cone of KILAUEA | Hawaiian Islands | |
| KOLGRAFARHOLL | Cone of GRIMSNES | Iceland (southwestern) | |
| KOLLOTTADYNGJA | Shield volcano of ASKJA | Iceland (northeastern) | |
| KOLOBOCHON | Tuff ring of KOROSI | Africa (eastern) | |
| KOLOKOL | Stratovolcano of KOLOKOL GROUP | Kuril Islands | |
| KOLOKOL GROUP | Somma volcanoes | Historical | Kuril Islands |
| KOMA KULSHAN | Synonym of BAKER | USA (Washington) | |
| KOMA-DAKE | Synonym of AKITA-KOMAGA-TAKE | Honshu | |
| KOMAGA-TAKE | Dome of HAKONE | Honshu | |
| KOMAGA-TAKE | Synonym of KURIKOMA | Honshu | |
| KOMAGA-TAKE | Stratovolcano | Historical | Hokkaido |
| KOMAKATA-YAMA | Synonym of AKITA-KOMAGA-TAKE | Honshu | |
| KOMANAGO | Dome of OMANAGO GROUP | Honshu | |
| KOMAROV | Stratovolcano | Radiocarbon | Kamchatka Peninsula |
| KOMAROVA | Synonym of KOMAROV | Kamchatka Peninsula | |
| KOMBANG | Dome of KELUT | Java | |
| KOMBIU | Stratovolcano of RABAUL | New Britain | |
| KOMBUNG | Cone of ST. ANDREW STRAIT | Admiralty Islands | |
| KOMETSUKA | Cone of ASO | Ryukyu Islands & Kyushu | |
| KOMIA | Thermal Feature of MILOS | Greece | |
| KOMIKASA-YAMA | Cone of ON-TAKE | Honshu | |
| KOMITAKE | Stratovolcano of FUJI | Honshu | |
| KOMOCHI-YAMA | Cone of TORI-SHIMA | Izu, Volcano, & Mariana Islands | |
| KOMOLION | Vent of KOROSI | Africa (eastern) | |
| KOMOTI-YAMA [KOMOCHI-YAMA] | Cone of TORI-SHIMA | Izu, Volcano, & Mariana Islands | |
| KOMPIRA-YAMA | Dome of USU | Hokkaido | |
| KOMURO-YAMA | Cone of IZU-TOBU | Honshu | |
| KONE | Calderas | Historical | Africa (northeastern) & Red Sea |
| KONGOLO | Dome of SW USANGU BASIN | Africa (eastern) | |
| KONGSFELL | Crater Row of BRENNISTEINSFJOLL | Iceland (southwestern) | |
| KONI | Synonym of KONE | Africa (northeastern) & Red Sea | |
| KONIA | Stratovolcano of KOROVIN | Aleutian Islands | |
| KONIUJI | Stratovolcano | Uncertain | Aleutian Islands |
| KONIUSHI | Synonym of KONIUJI | Aleutian Islands | |
| KONO | Crater of AKAGI | Honshu | |
| KONOCTI, MT. | Dome of CLEAR LAKE | USA (California) | |
| KONPIRA-YAMA [KOMPIRA-YAMA] | Dome of USU | Hokkaido | |
| KONSEI-ZAN | Dome of NIKKO-SHIRANE | Honshu | |
| KONTARO | Dome of MILOS | Greece | |
| KONWONSAVARO | Crater of SURETAMATAI | Vanuatu | |
| KOOKOOLIGIT MOUNTAINS | Shield volcano | Holocene | Alaska (western) |
| KOOKOOLIT HILL | Cone of KOOKOOLIGIT MOUNTAINS | Alaska (western) | |
| KOOPER [LAGUNA RIO CUARTO] | Maar of POAS | Costa Rica | |
| KOPENG | Fissure vent of MERBABU | Java | |
| KORAKIA | Dome of MILOS | Greece | |
| KORANGA | Maar | Holocene | New Guinea & D'Entrecasteaux Islands |
| KORATH RANGE | Tuff cones | Holocene? | Africa (northeastern) & Red Sea |
| KORI-IKE | Vent of FUJI | Honshu | |
| KORIAKA (KORIAKSKY) | Synonym of KORYAKSKY | Kamchatka Peninsula | |
| KORIANA | Vent of FUJI | Honshu | |
| KORIATZKAIA, SOPKA | Synonym of KORYAKSKY | Kamchatka Peninsula | |
| KORINCI (KORINTJI) | Synonym of KERINCI | Sumatra | |
| KORJAKA (KORJAZKIJ) | Synonym of KORYAKSKY | Kamchatka Peninsula | |
| KORO | Cinder cones | Holocene? | Fiji Islands |
| KORONA | Dome of BOLSHOI SEMIACHIK | Kamchatka Peninsula | |
| KOROSI | Shield volcano | Holocene | Africa (eastern) |
| KOROTYSHKA | Cinder cone of MEDVEZHIA | Kuril Islands | |
| KOROVIN | Stratovolcanoes | Historical | Aleutian Islands |
| KOROWINSKY | Synonym of KOROVIN | Aleutian Islands | |
| KORUDAGI | Dome of ACIGOL-NEVSEHIR | Turkey | |
| KORYAKA | Synonym of KORYAKSKY | Kamchatka Peninsula | |
| KORYAKSKAYA SOPKA | Synonym of KORYAKSKY | Kamchatka Peninsula | |
| KORYAKSKY | Stratovolcano | Historical | Kamchatka Peninsula |
| KOS | Calderas | Pleistocene-Fumarolic | Greece |
| KOSANBE | Dome of SANBE | Honshu | |
| KOSCHELEWA | Synonym of KOSHELEV | Kamchatka Peninsula | |
| KOSCHELEWA PEAK | Synonym of OPALA | Kamchatka Peninsula | |
| KOSCIUSKO | Shield volcano of ANDRUS | Antarctica & South Sandwich Islands | |
| KOSEKUMARU | Cone of FUJI | Honshu | |
| KOSHELEV | Stratovolcano | Historical | Kamchatka Peninsula |
| KOSHELEVA, SOPKA | Synonym of KOSHELEV | Kamchatka Peninsula | |
| KOSHELEVSKY | Synonym of KOSHELEV | Kamchatka Peninsula | |
| KOSHIKI | Crater of MIYAKE-JIMA | Izu, Volcano, & Mariana Islands | |
| KOSHIKI-ANA | Crater of MIYAKE-JIMA | Izu, Volcano, & Mariana Islands | |
| KOSHIKI-DAKE | Cone of KIRISHIMA | Ryukyu Islands & Kyushu | |
| KOSHIKIRIZUKA | Cone of FUJI | Honshu | |
| KOSIKI-DAKE [KOSHIKI-DAKE] | Cone of KIRISHIMA | Ryukyu Islands & Kyushu | |
| KOSINGE REEF | Thermal Feature of SIMBO | Bougainville & Solomon Islands | |
| KOSTAKAN | Cinder cones | Holocene | Kamchatka Peninsula |
| KOSTAL | Cone of WELLS GRAY-CLEARWATER | Canada | |
| KOTAMOI [TEBENKOV] | Stratovolcano of GROZNY GROUP | Kuril Islands | |
| KOTCHLONGA | Synonym of ICHINSKY | Kamchatka Peninsula | |
| KOTENGU-DAKE | Stratovolcano of NIPESOTSU-MARUYAMA | Hokkaido | |
| KOTHRAUNSKULA | Cone of LJOSUFJOLL | Iceland (western) | |
| KOTIATO SAN | Synonym of RASSHUA | Kuril Islands | |
| KOTKHLONGA | Synonym of ICHINSKY | Kamchatka Peninsula | |
| KOTLUGJA | Synonym of KATLA | Iceland (southern) | |
| KOU, PUU | Shield volcano of KILAUEA | Hawaiian Islands | |
| KOU'A, MAUNGA | Pyroclastic Cone of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| KOUSSI, EMI | Pyroclastic shield | Holocene | Africa (northern) |
| KOUTSOUNORACHI | Dome of MILOS | Greece | |
| KOVACHI | Synonym of KAVACHI | Bougainville & Solomon Islands | |
| KOVRIZHKA | Cone of TUNKIN DEPRESSION | Russia (southeastern) | |
| KOYA-JIGOKU | Thermal Feature of TSURUMI | Ryukyu Islands & Kyushu | |
| KOZEL [KOZELSKIY] | Stratovolcano of AVACHINSKY | Kamchatka Peninsula | |
| KOZELSKIY | Stratovolcano of AVACHINSKY | Kamchatka Peninsula | |
| KOZIN-YAMA [KOJIN-YAMA] | Dome of CHOKAI | Honshu | |
| KOZOI GROUP | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| KOZU-SHIMA | Lava domes | Historical | Izu, Volcano, & Mariana Islands |
| KOZU-SIMA | Synonym of KOZU-SHIMA | Izu, Volcano, & Mariana Islands | |
| KOZUKA-YAMA | Dome of HAKONE | Honshu | |
| KOZUKUSHI-YAMA | Dome of OSORE-YAMA | Honshu | |
| KOZUKUSI-YAMA [KOZUKUSHI-YAMA] | Dome of OSORE-YAMA | Honshu | |
| KOZYREVSKII | Cone of VERNADSKII RIDGE | Kuril Islands | |
| KOZYREVSKY | Shield volcano | Holocene? | Kamchatka Peninsula |
| KRAB | Dome of KIKHPINYCH | Kamchatka Peninsula | |
| KRAEDUBORGIR | Fissure vent of FREMRINAMUR | Iceland (northeastern) | |
| KRAEVEDCHESKY | Thermal Feature of DZENZURSKY | Kamchatka Peninsula | |
| KRAFAKHOLAHRAUN | Fissure vent of HEKLA | Iceland (southern) | |
| KRAFLA | Caldera | Historical | Iceland (northeastern) |
| KRAINY | Shield volcano | Holocene? | Kamchatka Peninsula |
| KRAKAGIGAR | Fissure vent of HEKLA | Iceland (southern) | |
| KRAKAR | Synonym of KARKAR | Northeast of New Guinea | |
| KRAKATAO | Synonym of KRAKATAU | Krakatau | |
| KRAKATAU | Caldera | Historical | Krakatau |
| KRAKATOA | Synonym of KRAKATAU | Krakatau | |
| KRAKSHRAUN | Shield volcano of LANGJOKULL | Iceland (southwestern) | |
| KRAKSHRAUN | Shield volcano of LANGJOKULL | Iceland (southwestern) | |
| KRAMOSAN | Dome of KELUT | Java | |
| KRASHENINNIKOV | Crater of VERNADSKII RIDGE | Kuril Islands | |
| KRASHENINNIKOV | Caldera | Radiocarbon | Kamchatka Peninsula |
| KRASHENINNIKOV | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| KRASNAYA | Dome of SHIVELUCH | Kamchatka Peninsula | |
| KRASNUKH, MT. | Cone of VERNADSKII RIDGE | Kuril Islands | |
| KRASNY | Cinder cone of KOSTAKAN | Kamchatka Peninsula | |
| KRATIOTI | Dome of NISYROS | Greece | |
| KRAYNIY | Synonym of KRAINY | Kamchatka Peninsula | |
| KRENITZYN PEAK | Stratovolcano of TAO-RUSYR CALDERA | Kuril Islands | |
| KREPPUHRAUN | Fissure vent of KVERKFJOLL | Iceland (northeastern) | |
| KREPPUTUNGUHRAUN | Fissure vent of KVERKFJOLL | Iceland (northeastern) | |
| KRESTOVSKAYA [KRESTOVSKY] | Stratovolcano of USHKOVSKY | Kamchatka Peninsula | |
| KRESTOVSKII [KRESTOVSKY] | Stratovolcano of USHKOVSKY | Kamchatka Peninsula | |
| KRESTOVSKY | Stratovolcano of USHKOVSKY | Kamchatka Peninsula | |
| KRIKAHRAUN | Fissure vent of KATLA | Iceland (southern) | |
| KRINCING | Cone of IYANG-ARGAPURA | Java | |
| KRINGLUHRAUN | Crater Row of VATNAFJOLL | Iceland (southern) | |
| KRISUVIK | Crater rows | Historical | Iceland (southwestern) |
| KROFLUELDAR | Crater Row of KRAFLA | Iceland (northeastern) | |
| KROKAGILSOLDUHRAUN | Fissure vent of HEKLA | Iceland (southern) | |
| KROKAHRAUN | Fissure vent of HEKLA | Iceland (southern) | |
| KROKUR | Maar of KRASHENINNIKOV | Kamchatka Peninsula | |
| KRONER LAKE | Crater of DECEPTION ISLAND | Antarctica & South Sandwich Islands | |
| KRONOTSKY | Stratovolcano | Historical | Kamchatka Peninsula |
| KRONOTZKAIA SOPKA | Synonym of KRONOTSKY | Kamchatka Peninsula | |
| KRONOTZKY (KRONOZKY) | Synonym of KRONOTSKY | Kamchatka Peninsula | |
| KROPOTKIN | Cinder cone of OKA PLATEAU | Russia (southeastern) | |
| KROTIRAKI | Dome of MILOS | Greece | |
| KRUG | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| KRUGLAYA | Dome of UZON | Kamchatka Peninsula | |
| KRUGLENKY | Cinder cone of TOLBACHIK | Kamchatka Peninsula | |
| KRUMMEL | Stratovolcano of GARBUNA GROUP | New Britain | |
| KRUTAYA MOUNTAIN | Cone of IVAO GROUP | Kuril Islands | |
| KRUTOI | Dome of GOLOVNIN | Kuril Islands | |
| KRUTOI | Dome of BOLSHOI SEMIACHIK | Kamchatka Peninsula | |
| KRYSHANOVSKOGO [KRYZHANOVSKIY] | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| KRYSUVIK | Thermal Feature of KRISUVIK | Iceland (southwestern) | |
| KRYSUVIK | Thermal Feature of KRISUVIK | Iceland (southwestern) | |
| KRYZHANOVSKII | Caldera of TAO-RUSYR CALDERA | Kuril Islands | |
| KRYZHANOVSKIY | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| KRÜMMEL | Cone of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| KSKHUDACH | Synonym of KSUDACH | Kamchatka Peninsula | |
| KSUDACH | Stratovolcano | Historical | Kamchatka Peninsula |
| KSUDATSCH | Synonym of KSUDACH | Kamchatka Peninsula | |
| KTENAS | Dome of SANTORINI | Greece | |
| KU-LAO-RHE | Synonym of CU-LAO RE GROUP | Southeast Asia | |
| KUAN-TZO-LING | Cone of LONGGANG GROUP | China (eastern) | |
| KUANI HILL | Cone of NYAMBENI HILLS | Africa (eastern) | |
| KUANYINSHAN | Stratovolcano of TATUN GROUP | Taiwan | |
| KUCCHARO | Synonym of KUTCHARO | Hokkaido | |
| KUCHIERABU-JIMA | Synonym of KUCHINOERABU-JIMA | Ryukyu Islands & Kyushu | |
| KUCHINO-SHIMA | Stratovolcanoes | Radiocarbon | Ryukyu Islands & Kyushu |
| KUCHINOERABU-JIMA | Stratovolcanoes | Historical | Ryukyu Islands & Kyushu |
| KUCUK ARARAT | Cone of ARARAT | Turkey | |
| KUCUK KEFELI | Cone of ERCIYES DAGI | Turkey | |
| KUCUKMEDET TEPE | Cone of KARAPINAR FIELD | Turkey | |
| KUDRIAVY | Stratovolcano of MEDVEZHIA | Kuril Islands | |
| KUEISHANTAO | Stratovolcano | Historical | Taiwan |
| KUGAK (KUGAT) | Synonym of KUKAK | Alaska Peninsula | |
| KUGIDACH-JAGUTSCHA [POGROMNI] | Stratovolcano of WESTDAHL | Aleutian Islands | |
| KUH-E BAZMAN | Synonym of BAZMAN | Iran & Afghanistan | |
| KUH-E TAFTAN | Synonym of TAFTAN | Iran & Afghanistan | |
| KUH-E-SAHAND | Synonym of SAHAND | Iran & Afghanistan | |
| KUH-I-DAFTAN | Synonym of TAFTAN | Iran & Afghanistan | |
| KUHARUA | Dome of TAUPO | New Zealand | |
| KUHHA-YE SABALAN | Synonym of SABALAN | Iran & Afghanistan | |
| KUIRAU PARK | Thermal Feature of ROTORUA | New Zealand | |
| KUJU | Stratovolcanoes | Historical | Ryukyu Islands & Kyushu |
| KUJU NAKA-DAKE | Dome of KUJU | Ryukyu Islands & Kyushu | |
| KUJYU GROUP | Synonym of KUJU | Ryukyu Islands & Kyushu | |
| KUKAI, PUU | Cone of KILAUEA | Hawaiian Islands | |
| KUKAK | Stratovolcano | Fumarolic | Alaska Peninsula |
| KUKII, PUU [PUU KUKAI] | Cone of KILAUEA | Hawaiian Islands | |
| KUKUSAN | Cone of SEMERU | Java | |
| KUKUSAN | Cone of IJEN | Java | |
| KULA | Cinder cones | Holocene | Turkey |
| KULA DIVLIT | Cone of KULA | Turkey | |
| KULABU | Cone of SORIKMARAPI | Sumatra | |
| KULAKOV | Dome of BOLSHOI SEMIACHIK | Kamchatka Peninsula | |
| KULAN SPRING | Thermal Feature of APO | Mindanao | |
| KULANAPAHU | Cone of HALEAKALA | Hawaiian Islands | |
| KULICH | Dome of BEZYMIANNY | Kamchatka Peninsula | |
| KULICHI | Dome of MEDVEZHIA | Kuril Islands | |
| KULKEV | Shield volcano | Holocene? | Kamchatka Peninsula |
| KULKUL | Synonym of RITTER ISLAND | Northeast of New Guinea | |
| KULSHAN | Synonym of BAKER | USA (Washington) | |
| KULSHAN CALDERA | Pleistocene caldera of BAKER | USA (Washington) | |
| KULUA, PUU | Cone of MAUNA LOA | Hawaiian Islands | |
| KUMA, MAUNGA | Pyroclastic Cone of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| KUMA-DAKE | Stratovolcano of DAISETSU | Hokkaido | |
| KUMA-OTOSHI | Crater of KUTCHARO | Hokkaido | |
| KUMA-OTOSI [KUMA-OTOSHI] | Crater of KUTCHARO | Hokkaido | |
| KUMANO-DAKE | Dome of ZAO | Honshu | |
| KUMANO-DAKE | Dome of ZAO | Honshu | |
| KUMBANG | Thermal Feature of DIENG VOLCANIC COMPLEX | Java | |
| KUMBOLO, RANU | Maar of SEMERU | Java | |
| KUMMEN | Cone of JAN MAYEN | Atlantic Ocean (Jan Mayen) | |
| KUMONO-TAIRA | Shield volcano of WASHIBA-KUMONOTAIRA | Honshu | |
| KUMU, PUU | Cone of HALEAKALA | Hawaiian Islands | |
| KUNASHIRI-RAUSU | Synonym of MENDELEEV | Kuril Islands | |
| KUNDI-BARUKLINGTING-SAPIKEREP | Pleistocene caldera of TENGGER CALDERA | Java | |
| KUNG-PO | Synonym of TENGCHONG | Southeast Asia | |
| KUNIANG, KAPUNDAN [KEPUNDAN KUNIANG] | Crater of MARAPI | Sumatra | |
| KUNIANG, KEPUNDAN | Crater of MARAPI | Sumatra | |
| KUNII [KUNIR] | Dome of DIENG VOLCANIC COMPLEX | Java | |
| KUNINOFUKA-YAMA | Synonym of FUJI | Honshu | |
| KUNIR | Dome of DIENG VOLCANIC COMPLEX | Java | |
| KUNJIT | Synonym of KUNYIT | Sumatra | |
| KUNLUN VOLCANIC GROUP | Pyroclastic cones | Historical | China (western) |
| KUNTOMINTAR | Hydrothermal field | Pleistocene-Fumarolic | Kuril Islands |
| KUNUMI-DAKE | Dome of UNZEN | Ryukyu Islands & Kyushu | |
| KUNUWERI | Synonym of TEON | Banda Sea | |
| KUNYIT | Stratovolcano | Fumarolic | Sumatra |
| KUPAIANAHA | Shield volcano of KILAUEA | Hawaiian Islands | |
| KUPENUI | Cone of WHANGAREI | New Zealand | |
| KUPOL SKALISTY | Dome of BOLSHOI SEMIACHIK | Kamchatka Peninsula | |
| KUPREANOF | Stratovolcano | Historical | Alaska Peninsula |
| KURAISHI-DAKE | Synonym of ZAO | Honshu | |
| KURAISWA | Vent of KOROSI | Africa (eastern) | |
| KURASAKI | Stratovolcano of AOGA-SHIMA | Izu, Volcano, & Mariana Islands | |
| KURDJ AYMAN | Cone of HAYLAN, JABAL | Arabia | |
| KURIKOMA | Stratovolcano | Historical | Honshu |
| KURIL LAKE | Synonym of KURILE LAKE | Kamchatka Peninsula | |
| KURILE LAKE | Caldera | Radiocarbon | Kamchatka Peninsula |
| KURILSKOE, LAKE | Synonym of KURILE LAKE | Kamchatka Peninsula | |
| KURINO-DAKE | Stratovolcano of KIRISHIMA | Ryukyu Islands & Kyushu | |
| KURO-DAKE | Dome of KUJU | Ryukyu Islands & Kyushu | |
| KURO-DAKE | Dome of DAISETSU | Hokkaido | |
| KURO-DAKE | Synonym of SINARKA | Kuril Islands | |
| KURO-JIMA | Cone of FUKUE-JIMA | Ryukyu Islands & Kyushu | |
| KURODANI | Crater of YAKE-DAKE | Honshu | |
| KUROFU-YAMA | Stratovolcano of ASAMA | Honshu | |
| KUROI (KUROISI) | Synonym of TAO-RUSYR CALDERA | Kuril Islands | |
| KUROISHI-DAKE | Synonym of TAO-RUSYR CALDERA | Kuril Islands | |
| KUROISHIMORI | Dome of AKITA-YAKE-YAMA | Honshu | |
| KUROIWA-YAMA | Cone of KUJU | Ryukyu Islands & Kyushu | |
| KUROKAWA | Thermal Feature of KUJU | Ryukyu Islands & Kyushu | |
| KUROSE HOLE | Submarine volcano | Holocene? | Izu, Volcano, & Mariana Islands |
| KUROTSUKA | Cone of FUJI | Honshu | |
| KURSI, GUNUNG | Cinder cone of TENGGER CALDERA | Java | |
| KURTTEPE | Thermal Feature of HASAN DAGI | Turkey | |
| KURUB | Shield volcano | Holocene | Africa (northeastern) & Red Sea |
| KURUM | Crater of KARKAR | Northeast of New Guinea | |
| KURUMI-DAKE | Dome of NARUGO | Honshu | |
| KURURI | Cinder cone of MANAGLASE PLATEAU | New Guinea & D'Entrecasteaux Islands | |
| KURWEETON, MT. | Cone of NEWER VOLCANICS PROV | Australia | |
| KUSATSU-SHIRANE | Stratovolcanoes | Historical | Honshu |
| KUSATU-SIRANE | Synonym of KUSATSU-SHIRANE | Honshu | |
| KUSENBU | Stratovolcano of UNZEN | Ryukyu Islands & Kyushu | |
| KUSENRI-GAHAMA | Pyroclastic Cone of ASO | Ryukyu Islands & Kyushu | |
| KUSHIGA-MINE | Stratovolcano of BANDAI | Honshu | |
| KUSHUIHUAN-BEISHAN | Cone of UNNAMED | China (western) | |
| KUSIGA-MINE [KUSHIGA-MINE] | Stratovolcano of BANDAI | Honshu | |
| KUSKA | Synonym of KISKA | Aleutian Islands | |
| KUSSHARO | Synonym of KUTCHARO | Hokkaido | |
| KUST | Cinder cone of TOLBACHIK | Kamchatka Peninsula | |
| KUSUKU | Dome of IWO-TORI-SHIMA | Ryukyu Islands & Kyushu | |
| KUTALI, TAVANI [POMARE] | Stratovolcano of EPI | Vanuatu | |
| KUTCHARO | Caldera | Tephrochronology | Hokkaido |
| KUTIERABU-ZIMA | Synonym of KUCHINOERABU-JIMA | Ryukyu Islands & Kyushu | |
| KUTINA | Synonym of SPOKOINY | Kamchatka Peninsula | |
| KUTINO-SIMA | Synonym of KUCHINO-SHIMA | Ryukyu Islands & Kyushu | |
| KUTINOERABU-ZIMA | Synonym of KUCHINOERABU-JIMA | Ryukyu Islands & Kyushu | |
| KUTINSKAYA GROUP [KUTINSKY GROUP] | Cone of TUNKIN DEPRESSION | Russia (southeastern) | |
| KUTINSKY GROUP | Cone of TUNKIN DEPRESSION | Russia (southeastern) | |
| KUTLYUKHAT | Synonym of KUKAK | Alaska Peninsula | |
| KUTTARA | Stratovolcanoes | Tephrochronology | Hokkaido |
| KUTTYARO | Synonym of KUTCHARO | Hokkaido | |
| KUTUM VOLCANIC FIELD | Scoria cones | Holocene? | Africa (northern) |
| KUWAE | Caldera | Historical | Vanuatu |
| KUWAKIDAIRA | Caldera of MIYAKE-JIMA | Izu, Volcano, & Mariana Islands | |
| KUWANOKI-DAIRA | Cone of MIYAKE-JIMA | Izu, Volcano, & Mariana Islands | |
| KUYUP | Shield volcano of UKSICHAN | Kamchatka Peninsula | |
| KUZAY | Dome of ACIGOL-NEVSEHIR | Turkey | |
| KUZYU VOLCANO GROUP | Synonym of KUJU | Ryukyu Islands & Kyushu | |
| KVERKFJALLARANAMYNDUN | Crater Row of KVERKFJOLL | Iceland (northeastern) | |
| KVERKFJOLL | Stratovolcano | Historical | Iceland (northeastern) |
| KVIAHNJUKUR | Cone of SNAEFELLSJOKULL | Iceland (western) | |
| KVOSTOF ISLAND | Synonym of DAVIDOF | Aleutian Islands | |
| KWA MIKUNGU | Cone of KILIMANJARO | Africa (eastern) | |
| KWADISHA | Cone of CHYULU HILLS | Africa (eastern) | |
| KWAMWIGA | Crater of BUNYARUGURU | Africa (central) | |
| KWANKAIJI-ONSEN | Thermal Feature of TSURUMI | Ryukyu Islands & Kyushu | |
| KWEO BUTTE | Cone of NEWBERRY | USA (Oregon) | |
| KWETEON | Cone of GAUA | Vanuatu | |
| KWINNUM BUTTE | Cone of NEWBERRY | USA (Oregon) | |
| KWITINTOG | Stratovolcano of SURETAMATAI | Vanuatu | |
| KWOHL BUTTE | Shield volcano of BACHELOR | USA (Oregon) | |
| KYAMWERU | Crater of BUNYARUGURU | Africa (central) | |
| KYATWA | Tuff cones | Holocene? | Africa (central) |
| KYAUKKA | Vent of LOWER CHINDWIN | Southeast Asia | |
| KYAUKMYET | Vent of LOWER CHINDWIN | Southeast Asia | |
| KYEGANYWA | Tuff cone of FORT PORTAL | Africa (central) | |
| KYEMA | Crater of BUNYARUGURU | Africa (central) | |
| KYIWIN TAUNG | Vent of LOWER CHINDWIN | Southeast Asia | |
| KYOGA | Crater of BUNYARUGURU | Africa (central) | |
| KYOWA-YAMA | Dome of CHOKAI | Honshu | |
| LA PALMA | Stratovolcanoes | Historical | Canary Islands |
| LA ROJA | Thermal Feature of VULCANO | Italy | |
| LABO | Compound volcano | Pleistocene-Hot Springs | Luzon |
| LABOR, AUSOLES DE LA | Thermal Feature of APANECA RANGE | El Salvador & Honduras | |
| LABRONZO | Crater of STROMBOLI | Italy | |
| LACONA | Synonym of GAUA | Vanuatu | |
| LACROIX, FUMEROLLE | Thermal Feature of SOUFRIERE GUADELOUPE | West Indies | |
| LACROIX, PITON | Cinder cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| LADOLAM | Thermal Feature of LIHIR | New Ireland | |
| LAGAFELL | Shield volcano of REYKJANES | Iceland (southwestern) | |
| LAGENDA | Synonym of GARUA HARBOUR | New Britain | |
| LAGERNY | Cinder cone of MEDVEZHIA | Kuril Islands | |
| LAGERNY | Dome of AKADEMIA NAUK | Kamchatka Peninsula | |
| LAGERNY | Cinder cone of TOLBACHIK | Kamchatka Peninsula | |
| LAGERNY | Shield volcano of BELY | Kamchatka Peninsula | |
| LAGHETTO | Maar of ALBAN HILLS | Italy | |
| LAGHETTO | Cinder cone of ETNA | Italy | |
| LAGO | See proper name (e.g. VECCHIENNA, LAGO) | Italian and Spanish for LAKE | |
| LAGOA | See proper name (e.g. PILAR, LAGOA DO) | Portuguese for LAKE | |
| LAGOINHA | Dome of TERCEIRA | Azores | |
| LAGRIMAS, LAS | Cinder cone of ATUEL, CALDERA DEL | Central Chile & Argentina | |
| LAGULA, MT. | Cone of SAN PABLO VOLCANIC FIELD | Luzon | |
| LAGUMISHERA | Cone of KILIMANJARO | Africa (eastern) | |
| LAGUNA | See proper name (e.g. CHANMICO, LAGUNA) | Spanish for LAKE | |
| LAGUNA | Crater of GAMALAMA | Halmahera | |
| LAGUNA | Fissure vent of ZUNI-BANDERA | USA (New Mexico) | |
| LAGUNA CALDERA | Caldera | Fumarolic | Luzon |
| LAGUNA VOLC FIELD | Synonym of SAN PABLO VOLCANIC FIELD | Luzon | |
| LAGUNA, ALTO DE LA | Dome of RUIZ, NEVADO DEL | Colombia | |
| LAGUNA, CALDERA DE | Cinder cone of FUERTEVENTURA | Canary Islands | |
| LAGUNA, LA | Dome of ZITACUARO-VALLE DE BRAVO | México | |
| LAGUNAS, LAS [MONTE DE LA CRUZ] | Cinder cone of BARVA | Costa Rica | |
| LAGUNILLAS, LAS | Cinder cone of CHILLAN, NEVADOS DE | Central Chile & Argentina | |
| LAGUNITA, LA [LAGUNA LAS NINFAS] | Crater of APANECA RANGE | El Salvador & Honduras | |
| LAHENDONG | Maar of TONDANO CALDERA | Sulawesi | |
| LAHER, KAWAH | Thermal Feature of KENDANG | Java | |
| LAIFENGSHAN | Cone of TENGCHONG | Southeast Asia | |
| LAIGONGKENSHAN | Stratovolcano of TATUN GROUP | Taiwan | |
| LAIKA | Cone of KUWAE | Vanuatu | |
| LAIKA BANK [KARUA] | Submarine vent of KUWAE | Vanuatu | |
| LAIMANA, PUU | Cone of KILAUEA | Hawaiian Islands | |
| LAJA | Synonym of ANTUCO | Central Chile & Argentina | |
| LAJARA | Synonym of MOCHO-CHOSHUENCO | Central Chile & Argentina | |
| LAJAS, CERRO LAS | Shield volcano of COFRE DE PEROTE | México | |
| LAJAS, LAS | Shield volcano | Holocene? | Nicaragua |
| LAJAS, MONTANAS LAS | Fissure vent of TENERIFE | Canary Islands | |
| LAKAGIGAR [LAKI] | Crater Row of GRIMSVOTN | Iceland (northeastern) | |
| LAKE | See proper name (e.g. WISDOM, LAKE) | ||
| LAKE HILL | Cinder cone of ST. PAUL ISLAND | Alaska (western) | |
| LAKESHORE CONE | Cone of SEMISOPOCHNOI | Aleutian Islands | |
| LAKI | Crater Row of GRIMSVOTN | Iceland (northeastern) | |
| LAKONA | Synonym of GAUA | Vanuatu | |
| LAKWA, VUTI | Cone of AOBA | Vanuatu | |
| LALALA | Cone of DAKATAUA | New Britain | |
| LALASHO, OL DOINYO | Cone of CHYULU HILLS | Africa (eastern) | |
| LALOANEA | Cone of UPOLU | Samoan & Wallis Islands | |
| LALOLALO | Crater of WALLIS ISLANDS | Samoan & Wallis Islands | |
| LALUAI | Pleistocene caldera of LOLORU | Bougainville & Solomon Islands | |
| LAM TEUBA | Pleistocene caldera of SEULAWAH AGAM | Sumatra | |
| LAMA HERU | Synonym of ILIWERUNG | Lesser Sunda Islands | |
| LAMA, KABA | Crater of KABA | Sumatra | |
| LAMATELANG | Synonym of ILIBOLENG | Lesser Sunda Islands | |
| LAMBADALSHRAUN | Crater Row of VATNAFJOLL | Iceland (southern) | |
| LAMBAFIT | Fissure vent of HEKLA | Iceland (southern) | |
| LAMBAGAI, OL DOINYO | Cone of CHYULU HILLS | Africa (eastern) | |
| LAMBAGIGAR [LAMBAFIT] | Fissure vent of HEKLA | Iceland (southern) | |
| LAMBAHRAUN | Shield volcano of LANGJOKULL | Iceland (southwestern) | |
| LAMBAHRAUN | Fissure vent of HOFSJOKULL | Iceland (southwestern) | |
| LAMBAVATNSGIGAR | Fissure vent of GRIMSVOTN | Iceland (northeastern) | |
| LAMINGTON | Stratovolcano | Historical | New Guinea & D'Entrecasteaux Islands |
| LAMONA [LAMONAI] | Stratovolcano of DAWSON STRAIT GROUP | New Guinea & D'Entrecasteaux Islands | |
| LAMONAI | Stratovolcano of DAWSON STRAIT GROUP | New Guinea & D'Entrecasteaux Islands | |
| LAMONAI-OIAU GROUP | Synonym of DAWSON STRAIT GROUP | New Guinea & D'Entrecasteaux Islands | |
| LAMONGAN | Stratovolcano | Historical | Java |
| LAMUTSKY | Shield volcano of IETTUNUP | Kamchatka Peninsula | |
| LANANG | Crater of GEDE | Java | |
| LANANG, KAWAH [KAWAH UPAS] | Crater of TANGKUBANPARAHU | Java | |
| LANDAYAO | Cone of MATUTUM | Mindanao | |
| LANDES CLEAVER | Vent of BAKER | USA (Washington) | |
| LANGALANGA, MT. | Cone of DAKATAUA | New Britain | |
| LANGE, CRATER | Crater of GAROVE | New Britain | |
| LANGFOIS, LE | Crater of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| LANGHOLL | Shield volcano of REYKJANES | Iceland (southwestern) | |
| LANGILA | Complex volcano | Historical | New Britain |
| LANGJOKULL | Subglacial volcano | Radiocarbon | Iceland (southwestern) |
| LANGLA | Synonym of LANGILA | New Britain | |
| LANGOAN | Thermal Feature of TONDANO CALDERA | Sulawesi | |
| LANGUDI | Synonym of YANGUDI | Africa (northeastern) & Red Sea | |
| LANGVIUHRAUN | Crater Row of VATNAFJOLL | Iceland (southern) | |
| LANIN | Stratovolcano | Radiocarbon | Central Chile & Argentina |
| LANITULI | Crater of WALLIS ISLANDS | Samoan & Wallis Islands | |
| LANO | Cone of WALLIS ISLANDS | Samoan & Wallis Islands | |
| LANO-O-LEPA | Cone of UPOLU | Samoan & Wallis Islands | |
| LANO-O-MOA | Cone of UPOLU | Samoan & Wallis Islands | |
| LANQUIMAY | Synonym of LONQUIMAY | Central Chile & Argentina | |
| LANSA, BUKIT | Stratovolcano of BIBINOI | Halmahera | |
| LANTEGY, PUY DE | Cone of CHAINE DES PUYS | Western Europe | |
| LANUATA'ATA | Cone of UPOLU | Samoan & Wallis Islands | |
| LANUMAHU | Crater of WALLIS ISLANDS | Samoan & Wallis Islands | |
| LANUTAVAKE | Crater of WALLIS ISLANDS | Samoan & Wallis Islands | |
| LANUTO'O, LAKE | Cone of UPOLU | Samoan & Wallis Islands | |
| LANZAROTE | Fissure vents | Historical | Canary Islands |
| LAO-HEI-TING-TZU [LAOHEIDINGZI] | Shield volcano of CHANGBAISHAN | China (eastern) | |
| LAOGUIPO | Cone of TENGCHONG | Southeast Asia | |
| LAOHEIDINGZI | Shield volcano of CHANGBAISHAN | China (eastern) | |
| LAOHEISHAN | Cone of WUDALIANCHI | China (eastern) | |
| LAPAC | Cone of JOLO | Sulu Islands | |
| LAPAS, CALDERA DE LAS | Cinder cone of LANZAROTE | Canary Islands | |
| LARDARELLO | Synonym of LARDERELLO | Italy | |
| LARDERELLO | Explosion craters | Historical | Italy |
| LARDERLLO-TRAVALE | Synonym of LARDERELLO | Italy | |
| LARGA, LOMA | Cinder cone of MICHOACAN-GUANAJUATO | México | |
| LARSEN | Cone of SEAL NUNATAKS GROUP | Antarctica & South Sandwich Islands | |
| LAS | See proper name (e.g. PILAS, LAS) | Spanish for THE | |
| LASCAR | Stratovolcanoes | Historical | Northern Chile, Bolivia & Argentina |
| LASCHAMP, PUY DE | Cone of CHAINE DES PUYS | Western Europe | |
| LASKAR | Synonym of LASCAR | Northern Chile, Bolivia & Argentina | |
| LASO | Cone of KILIMANJARO | Africa (eastern) | |
| LASSEN PEAK | Dome of LASSEN VOLCANIC CENTER | USA (California) | |
| LASSEN VOLCANIC CENTER | Stratovolcano | Historical | USA (California) |
| LASSOLAS, PUY DE | Cone of CHAINE DES PUYS | Western Europe | |
| LASTARRIA | Stratovolcano | Holocene | Northern Chile, Bolivia & Argentina |
| LASTARRIA | Synonym of COPIAPO | Northern Chile, Bolivia & Argentina | |
| LATA | Pleistocene caldera of TA'U | Samoan & Wallis Islands | |
| LATE | Stratovolcano | Historical | Tonga Islands |
| LATERA | Pleistocene caldera of VULSINI | Italy | |
| LATIAL | Synonym of ALBAN HILLS | Italy | |
| LATTE | Synonym of LATE | Tonga Islands | |
| LATUKAN | Stratovolcano | Holocene? | Mindanao |
| LAUAAN | Dome of BILIRAN | Central Philippines | |
| LAUFAFELL | Dome of TORFAJOKULL | Iceland (southern) | |
| LAUFAHRAUN | Fissure vent of TORFAJOKULL | Iceland (southern) | |
| LAUGAHRAUN | Crater Row of TORFAJOKULL | Iceland (southern) | |
| LAUGARFJALL | Dome of GEYSIR | Iceland (southwestern) | |
| L'AUMONE, PUY DE | Dome of CHAINE DES PUYS | Western Europe | |
| LAUTARO | Stratovolcano | Historical | Southern Chile & Argentina |
| LAUTI | Cone of UPOLU | Samoan & Wallis Islands | |
| LAVA BUTTE | Cinder cone of NEWBERRY | USA (Oregon) | |
| LAVA DIVIDE | Stratovolcano of BAKER | USA (Washington) | |
| LAVA FORK | Cone of ISKUT-UNUK RIVER CONES | Canada | |
| LAVA MOUNTAIN | Cone of SQUAW RIDGE LAVA FIELD | USA (Oregon) | |
| LAVA PEAK | Cone of AKUTAN | Aleutian Islands | |
| LAVA PIT CRATER | Shield volcano of DIAMOND CRATERS | USA (Oregon) | |
| LAVA PLASTERED CONES | Cone of KILAUEA | Hawaiian Islands | |
| LAVA POINT | Cone of AKUTAN | Aleutian Islands | |
| LAVA TOP BUTTE | Cone of NEWBERRY | USA (Oregon) | |
| LAVIC LAKE | Volcanic field | Holocene? | USA (California) |
| LAVOVY SHISH | Cone of USHKOVSKY | Kamchatka Peninsula | |
| LAVOVY SHYSH [LAVOVY SHISH] | Cone of USHKOVSKY | Kamchatka Peninsula | |
| LAVOYI SHISH | Lava cone of KLIUCHEVSKOI | Kamchatka Peninsula | |
| LAWALACLOUGH | Synonym of ST. HELENS | USA (Washington) | |
| LAWALUK | Vent of NEWER VOLCANICS PROV | Australia | |
| LAWARKAWRA (LAWORKAWRA) | Synonym of NILA | Banda Sea | |
| LAWELATLA | Synonym of ST. HELENS | USA (Washington) | |
| LAWOE | Synonym of LAWU | Java | |
| LAWU | Stratovolcano | Historical | Java |
| LAXA | Synonym of ANTUCO | Central Chile & Argentina | |
| LAZIALE, VULCANO | Synonym of ALBAN HILLS | Italy | |
| LE | See proper name (e.g. TOUO, LE) | French for THE | |
| LEAL | Synonym of RESAGO | Central Chile & Argentina | |
| L'EAU, PITON DE | Cinder cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| LEBAKDJERO [LEBAKJERO] | Crater of TALAGABODAS | Java | |
| LEBAKJERO | Crater of TALAGABODAS | Java | |
| LEBETOBI | Synonym of LEWOTOBI | Lesser Sunda Islands | |
| LEBO RAJA | Synonym of RAJABASA | Sumatra | |
| LEFULUFULUA | Dome of TUTUILA | Samoan & Wallis Islands | |
| LEGA, WOLO | Crater of INIELIKA | Lesser Sunda Islands | |
| LEGATALA (LEGELALA, LEGETALA) | Synonym of SERUA | Banda Sea | |
| LEGGJABRJOTUR | Shield volcano of LANGJOKULL | Iceland (southwestern) | |
| LEGGJARBRJOTUR [SOLKATLA] | Shield volcano of LANGJOKULL | Iceland (southwestern) | |
| LEHNSESSEL | Synonym of TABURETE | El Salvador & Honduras | |
| LEHU, PUU | Cone of MAUNA KEA | Hawaiian Islands | |
| LEHUA, PUU | Cone of HUALALAI | Hawaiian Islands | |
| LEIHUFENG | Pyroclastic Cone of HAINAN DAO | Southeast Asia | |
| LEIHULING | Pyroclastic Cone of HAINAN DAO | Southeast Asia | |
| LEILA | Dome of TUTUILA | Samoan & Wallis Islands | |
| LEIRHAFNARSKORD | Vent of FREMRINAMUR | Iceland (northeastern) | |
| LEIRHNJUKUR | Crater Row of KRAFLA | Iceland (northeastern) | |
| LEIRHNUKAGIGAR [LEIRHNJUKUR] | Crater Row of KRAFLA | Iceland (northeastern) | |
| LEIRHNUKUR [LEIRHNJUKUR] | Crater Row of KRAFLA | Iceland (northeastern) | |
| LEITIN | Shield volcano of BRENNISTEINSFJOLL | Iceland (southwestern) | |
| LEIZHOU BANDAO | Volcanic field | Holocene | Southeast Asia |
| LEJAS, MONTANA | Cone of TENERIFE | Canary Islands | |
| LEKER | Cone of SEMERU | Java | |
| LEMA | Synonym of DOMA PEAKS | New Guinea & D'Entrecasteaux Islands | |
| LEMEI ROCK | Shield volcano of INDIAN HEAVEN | USA (Washington) | |
| LEMONGAN | Synonym of LAMONGAN | Java | |
| LEMONGO | Cone of KILIMANJARO | Africa (eastern) | |
| LEMRIKA | Cone of KILIMANJARO | Africa (eastern) | |
| L'ENCLOS FOUQUE | Caldera of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| LENGAI, OL DOINYO | Stratovolcano | Historical | Africa (eastern) |
| L'ENGAI, OLDONYO | Synonym of LENGAI, OL DOINYO | Africa (eastern) | |
| LENGKOAN | Cone of TONDANO CALDERA | Sulawesi | |
| LENGLET, MORNE | Cinder cone of SOUFRIERE GUADELOUPE | West Indies | |
| LENGUA DE VULCANO | Dome of DESCABEZADO GRANDE | Central Chile & Argentina | |
| LENINGRADETS [KEKUKNAYSKY] | Shield volcano of BOLSHOI-KEKUKNAYSKY | Kamchatka Peninsula | |
| LENTIA | Dome of VULCANO | Italy | |
| LENTISCAL, MONTANA | Cone of GRAN CANARIA | Canary Islands | |
| LEON DORMIENTE, EL | Tuff cone of SAN CRISTOBAL | Galápagos Islands | |
| LEONA, CERRO LA | Cinder cone of COATEPEQUE CALDERA | El Salvador & Honduras | |
| LEONARD EAST | Dome of LEONARD RANGE | Mindanao | |
| LEONARD KNIAZEFF | Synonym of LEONARD RANGE | Mindanao | |
| LEONARD NORTH | Dome of LEONARD RANGE | Mindanao | |
| LEONARD RANGE | Stratovolcano | Radiocarbon | Mindanao |
| LEONARD, LAKE | Caldera of LEONARD RANGE | Mindanao | |
| LEONE, VALLE DEL | Caldera of ETNA | Italy | |
| LEPER'S ISLAND | Synonym of AOBA | Vanuatu | |
| LEPRE, MONTE | Cinder cone of ETNA | Italy | |
| LEPSHKA | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| LEPU'E | Cone of TA'U | Samoan & Wallis Islands | |
| LEREBOLENG | Synonym of LEROBOLENG | Lesser Sunda Islands | |
| LEREK | Caldera of ILIWERUNG | Lesser Sunda Islands | |
| LEROBOLENG | Complex volcano | Historical | Lesser Sunda Islands |
| LERONGO | Cone of KILIMANJARO | Africa (eastern) | |
| LESHE | Crater of LOWER CHINDWIN | Southeast Asia | |
| LESHNAYA | Cinder cone of TOLBACHIK | Kamchatka Peninsula | |
| LESKOV ISLAND | Stratovolcano | Fumarolic | Antarctica & South Sandwich Islands |
| LESNOI | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| LESONG | Stratovolcano of BRATAN | Lesser Sunda Islands | |
| LESSON ISLAND | Synonym of BAM | Northeast of New Guinea | |
| L'ETANG SEC, CALDEIRA DE | Crater of PELEE | West Indies | |
| LETHA TAUNG | Synonym of SINGU PLATEAU | Southeast Asia | |
| LETPADAUNG | Cone of LOWER CHINDWIN | Southeast Asia | |
| LETTE | Synonym of LATE | Tonga Islands | |
| LEURA, MT. | Tuff ring of NEWER VOLCANICS PROV | Australia | |
| LEUTAK, KAWAH | Thermal Feature of KAMOJANG, KAWAH | Java | |
| LEUTIK, KAWAH | Crater of GEDE | Java | |
| LEUTONGEY | Shield volcano | Holocene? | Kamchatka Peninsula |
| LEVASHOV | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| LEVEL MOUNTAIN | Shield volcano | Holocene? | Canada |
| LEVEL, THE | Dome of SABA | West Indies | |
| LEVERA HILL | Dome of ST. CATHERINE | West Indies | |
| LEVERA ISLAND | Dome of ST. CATHERINE | West Indies | |
| LEVERA POND | Crater of ST. CATHERINE | West Indies | |
| LEWENO (LEWERO, LEWEROH) | Synonym of LEROBOLENG | Lesser Sunda Islands | |
| LEWETOBI | Synonym of LEWOTOBI | Lesser Sunda Islands | |
| LEWETOBI PERAMPUAN [LEWETOBI PEREMPUAN] | Stratovolcano of LEWOTOBI | Lesser Sunda Islands | |
| LEWETOBI PEREMPUAN | Stratovolcano of LEWOTOBI | Lesser Sunda Islands | |
| LEWOLEMBWI | Maar of AMBRYM | Vanuatu | |
| LEWONO (LEWOROH) | Synonym of LEROBOLENG | Lesser Sunda Islands | |
| LEWOTOBI | Stratovolcanoes | Historical | Lesser Sunda Islands |
| LEWOTOBI LAKILAKI | Stratovolcano of LEWOTOBI | Lesser Sunda Islands | |
| LEWOTOLO | Stratovolcano | Historical | Lesser Sunda Islands |
| LHO BALOHAN CEUNOKOT | Thermal Feature of PULAU WEH | Sumatra | |
| LHO BALOHAN TJEUNOKOT [LHO BAL. CEUNOKOT] | Thermal Feature of PULAU WEH | Sumatra | |
| LIADO HAYK | Maars | Holocene? | Africa (northeastern) & Red Sea |
| LIAMUIGA | Stratovolcano | Radiocarbon | West Indies |
| LIANBANSHAN [HUOSHAOSHAN] | Cone of WUDALIANCHI | China (eastern) | |
| LIANGBANSHAN [HUOSHAOSHAN] | Cone of WUDALIANCHI | China (eastern) | |
| LIATSIKAS | Dome of SANTORINI | Greece | |
| LIBORIO, CERRO | Cinder cone of NAOLINCO VOLCANIC FIELD | México | |
| LIBTON | Thermal Feature of BILIRAN | Central Philippines | |
| LICANCABUR | Stratovolcano | Holocene | Northern Chile, Bolivia & Argentina |
| LICANCAUR | Synonym of LICANCABUR | Northern Chile, Bolivia & Argentina | |
| LICHTMESS INSEL | Synonym of CANDLEMAS ISLAND | Antarctica & South Sandwich Islands | |
| LICTO | Scoria cones | Holocene? | Ecuador |
| LIDHOGDA | Cone of JAN MAYEN | Atlantic Ocean (Jan Mayen) | |
| LIEN KHANG MOUNT | Caldera of HAUT DONG NAI | Southeast Asia | |
| LIERWEISEN | Maar of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| LIESKOW ISLAND | Synonym of LESKOV ISLAND | Antarctica & South Sandwich Islands | |
| LIFERFE, MONTANA | Cinder cone of TENERIFE | Canary Islands | |
| LIFOS TEPE | Dome of ERCIYES DAGI | Turkey | |
| LIHIR | Volcanic complex | Holocene | New Ireland |
| LIJSKOW ISLAND | Synonym of LESKOV ISLAND | Antarctica & South Sandwich Islands | |
| LIKAIU EAST | Shield volcano of BARRIER, THE | Africa (eastern) | |
| LIKAIU WEST | Shield volcano of BARRIER, THE | Africa (eastern) | |
| LIKAYU [LIKAIU] | Shield volcano of BARRIER, THE | Africa (eastern) | |
| LILEY | Cone of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| LILLOOET CONES | Synonym of BRIDGE RIVER CONES | Canada | |
| LIMAS | Cone of WILIS | Java | |
| LIMAY, MT. | Cone of MARIVELES | Luzon | |
| LIMBO, CERRO EL | Cinder cone of CHINAMECA | El Salvador & Honduras | |
| LIMITROFE [VOLCAN BARRANCAS] | Dome of MAULE, LAGUNA DEL | Central Chile & Argentina | |
| LINA | Synonym of NILA | Banda Sea | |
| LINAN | Thermal Feature of MATUTUM | Mindanao | |
| LINDAHRAUN | Fissure vent of KVERKFJOLL | Iceland (northeastern) | |
| LINDAHRAUN | Fissure vent of ASKJA | Iceland (northeastern) | |
| LINDENBERG ISLAND | Cone of SEAL NUNATAKS GROUP | Antarctica & South Sandwich Islands | |
| LINEAS, LAS | Dome of HUMEROS, LOS | México | |
| LINEINYI CRATER | Cone of VERNADSKII RIDGE | Kuril Islands | |
| LINGKER, GUNUNG | Cone of IJEN | Java | |
| LINGSHI | Cone of LEIZHOU BANDAO | Southeast Asia | |
| LINOW LAHENDONG [LAHENDONG] | Maar of TONDANO CALDERA | Sulawesi | |
| LIPARI | Stratovolcanoes | Historical | Italy |
| LIR | Synonym of LIHIR | New Ireland | |
| LIRANG | Dome of KELUT | Java | |
| LIRIA, CALDERA DE | Cinder cone of FUERTEVENTURA | Canary Islands | |
| LISERSER | Stratovolcano of SURETAMATAI | Vanuatu | |
| LISTADO, VOLCAN CERRO | Stratovolcano of MAIPO | Central Chile & Argentina | |
| LISTON, EL | Stratovolcano of TELICA | Nicaragua | |
| LITLA ELDBORG UNDIR GEITLAHLID | Crater Row of BRENNISTEINSFJOLL | Iceland (southwestern) | |
| LITLADYNGJA | Shield volcano of ASKJA | Iceland (northeastern) | |
| LITLAHRAUN | Crater Row of HENGILL | Iceland (southwestern) | |
| LITTLE BEAR MOUNTAIN | Tuya of HOODOO MOUNTAIN | Canada | |
| LITTLE BELKNAP | Shield volcano of BELKNAP | USA (Oregon) | |
| LITTLE BLACK PEAK | Cone of CARRIZOZO | USA (New Mexico) | |
| LITTLE BROTHER | Shield volcano of NORTH SISTER FIELD | USA (Oregon) | |
| LITTLE DONALD | Crater of WHITE ISLAND | New Zealand | |
| LITTLE GLASS MOUNTAIN | Dome of MEDICINE LAKE | USA (California) | |
| LITTLE HANISH ISLAND | Cone of HANISH | Africa (northeastern) & Red Sea | |
| LITTLE HEBE | Crater of UBEHEBE CRATERS | USA (California) | |
| LITTLE HILL | Cone of NEWER VOLCANICS PROV | Australia | |
| LITTLE HOT CREEK | Thermal Feature of LONG VALLEY | USA (California) | |
| LITTLE HOT SPRINGS VALLEY | Thermal Feature of LASSEN VOLCANIC CENTER | USA (California) | |
| LITTLE ISKUT | Shield volcano of SPECTRUM RANGE | Canada | |
| LITTLE MERU | Stratovolcano of MERU | Africa (eastern) | |
| LITTLE MORNE, THE | Cone of EPI | Vanuatu | |
| LITTLE MOUNTAIN | Stratovolcano of QUILL, THE | West Indies | |
| LITTLE MT. ADAMS | Cinder cone of ADAMS | USA (Washington) | |
| LITTLE MT. HOFFMAN | Cone of MEDICINE LAKE | USA (California) | |
| LITTLE MT. WORRI | Cone of GARUA HARBOUR | New Britain | |
| LITTLE NASH CRATER | Cinder cone of SAND MOUNTAIN FIELD | USA (Oregon) | |
| LITTLE ODELL BUTTE | Cinder cone of DAVIS LAKE | USA (Oregon) | |
| LITTLE PAVLOF | Cone of PAVLOF | Alaska Peninsula | |
| LITTLE RANGITOTO | Cone of AUCKLAND FIELD | New Zealand | |
| LITTLE SAND BUTTE | Cone of MEDICINE LAKE | USA (California) | |
| LITTLE SITCHIN | Synonym of LITTLE SITKIN | Aleutian Islands | |
| LITTLE SITKIN | Stratovolcano | Historical | Aleutian Islands |
| LITTLE SODA LAKE | Maar of SODA LAKES | USA (Nevada) | |
| LITTLE SPRINGS | Cinder cone of UINKARET FIELD | USA (Arizona) | |
| LITTLE WHITNEY | Cinder cone of GOLDEN TROUT CREEK | USA (California) | |
| LIU-HUANG-KU | Thermal Feature of TATUN GROUP | Taiwan | |
| LIUCHOW PENINSULA | Synonym of LEIZHOU BANDAO | Southeast Asia | |
| LIUHUANGDABAN | Cinder cone of KUNLUN VOLCANIC GROUP | China (western) | |
| LIWOWO | Cone of CAMEROON | Africa (western) | |
| LJOSAKRIDHA | Cone of SNAEFELLSJOKULL | Iceland (western) | |
| LJOSUFJALLAHRAUN | Crater Row of BARDARBUNGA | Iceland (northeastern) | |
| LJOSUFJOLL | Fissure vents | Anthropology | Iceland (western) |
| LJOTIPOLLUR | Crater of BARDARBUNGA | Iceland (northeastern) | |
| LLAFENCO GROUP | Crater of VILLARRICA | Central Chile & Argentina | |
| LLAGDEGUIN | Synonym of CALLAQUI | Central Chile & Argentina | |
| LLAIMA | Stratovolcano | Historical | Central Chile & Argentina |
| LLALLICUPE | Synonym of SOLLIPULLI | Central Chile & Argentina | |
| LLANCAHUE, VOLCANES DE | Cinder cone of QUETRUPILLAN | Central Chile & Argentina | |
| LLANGORSE MOUNTAIN | Cone of ATLIN VOLCANIC FIELD | Canada | |
| LLANGORSE VOLC FIELD | Synonym of ATLIN VOLCANIC FIELD | Canada | |
| LLANILLOS, LOS | Cinder cone of HIERRO | Canary Islands | |
| LLANO DEL BANCO | Fissure vent of LA PALMA | Canary Islands | |
| LLANO GRANDE | Pleistocene caldera of IZTACCIHUATL | México | |
| LLANO GRANDE | Vent of PRIMAVERA, SIERRA LA | México | |
| LLANO, CERRO EL | Dome of ZAPATERA | Nicaragua | |
| LLANO, EL | Caldera of ZAPATERA | Nicaragua | |
| LLANOS, LOS [TACANDE] | Cinder cone of LA PALMA | Canary Islands | |
| LLANQUIHUE | Synonym of OSORNO | Southern Chile & Argentina | |
| LLAO BAY | Shield volcano of CRATER LAKE | USA (Oregon) | |
| LLAO ROCK | Vent of CRATER LAKE | USA (Oregon) | |
| LLAYMAS | Synonym of LLAIMA | Central Chile & Argentina | |
| L'LIET, PITON DE | Cinder cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| LLOLLI, BANOS DE | Thermal Feature of CALABOZOS | Central Chile & Argentina | |
| LLULLAILLACO | Stratovolcano | Historical | Northern Chile, Bolivia & Argentina |
| LOA, MT. | Synonym of MAUNA LOA | Hawaiian Islands | |
| LOA, PUU | Cone of MAUNA KEA | Hawaiian Islands | |
| LOALOA, PUU | Cone of MAUNA KEA | Hawaiian Islands | |
| LOBETOBI | Synonym of LEWOTOBI | Lesser Sunda Islands | |
| LOBO RADJA (LOBO RAJA) | Synonym of RAJABASA | Sumatra | |
| LOBOA | Stratovolcano of NORTH VATE | Vanuatu | |
| LOBOBUTU | Pleistocene caldera of INIELIKA | Lesser Sunda Islands | |
| LOBOLEKE, WOLO | Crater of INIELIKA | Lesser Sunda Islands | |
| LOBOS, CERRO LOS | Dome of MICHOACAN-GUANAJUATO | México | |
| LOBOS, ISLA DE | Crater of FUERTEVENTURA | Canary Islands | |
| LOBOS, MONTANA | Cone of LANZAROTE | Canary Islands | |
| LOCKIT BUTTE | Cone of NEWBERRY | USA (Oregon) | |
| LODHMUNDUR | Dome of KERLINGARFJOLL | Iceland (southwestern) | |
| LODO PRIETO, CERRO | Dome of ZITACUARO-VALLE DE BRAVO | México | |
| LOEMOET BALAI, BOEKIT | Synonym of LUMUT BALAI, BUKIT | Sumatra | |
| LOEROES | Synonym of LURUS | Java | |
| LOEWINSSON-LESSIN | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| LOFIA | Cone of TOFUA | Tonga Islands | |
| LOFOS | Dome of NISYROS | Greece | |
| LOGKIPI GEYSER | Thermal Feature of BARRIER, THE | Africa (eastern) | |
| LOGOTHETIS | Vent of NISYROS | Greece | |
| LOIHI | Submarine volcano | Historical | Hawaiian Islands |
| LOKHMATY | Dome of BEZYMIANNY | Kamchatka Peninsula | |
| LOKI | Fissure vent of LOKI-FOGRUFJOLL | Iceland (northeastern) | |
| LOKI-FOGRUFJOLL | Subglacial volcano | Historical | Iceland (northeastern) |
| LOKIPPI [SUGUTA-LOGKIPI] | Thermal Feature of BARRIER, THE | Africa (eastern) | |
| LOKON | Cone of LOKON-EMPUNG | Sulawesi | |
| LOKON WALLENAURE [TOMPALUAN] | Crater of LOKON-EMPUNG | Sulawesi | |
| LOKON-EMPOENG | Synonym of LOKON-EMPUNG | Sulawesi | |
| LOKON-EMPUNG | Stratovolcano | Historical | Sulawesi |
| LOKUKUS | Vent of PAKA | Africa (eastern) | |
| LOLAH BUTTE | Cinder cone of BACHELOR | USA (Oregon) | |
| LOLARU | Synonym of LOLORU | Bougainville & Solomon Islands | |
| LOLATOLO [KASOLALI] | Thermal Feature of PAGO | New Britain | |
| LOLCO, VOLCAN | Cone of TOLGUACA | Central Chile & Argentina | |
| LOLCO, VOLCAN | Cinder cone of LONQUIMAY | Central Chile & Argentina | |
| LOLLO | Synonym of LOLO | New Britain | |
| LOLO | Stratovolcano | Holocene? | New Britain |
| LOLO BUTTE | Cinder cone of BACHELOR | USA (Oregon) | |
| LOLOBAU | Caldera | Historical | New Britain |
| LOLODA | Synonym of TOBARU | Halmahera | |
| LOLORU | Pyroclastic shield | Radiocarbon | Bougainville & Solomon Islands |
| LOLRUPANDE, OL DOINYO | Cone of CHYULU HILLS | Africa (eastern) | |
| LOLWAI | Tuff cone of AOBA | Vanuatu | |
| LOMA | See proper name (e.g. ACHACARA, LOMA) | Spanish for HILL | |
| LOMBENBEN | Shield volcano of AOBA | Vanuatu | |
| LOMBOK | Synonym of RINJANI | Lesser Sunda Islands | |
| LOMO NEGRO, VOLCAN DE | Cinder cone of HIERRO | Canary Islands | |
| LOMONOSOV GROUP | Cinder cones | Holocene | Kuril Islands |
| LONDOLOVIT | Stratovolcano of LIHIR | New Ireland | |
| LONDON, ISLA | Synonym of FUEGUINO | Southern Chile & Argentina | |
| LONE BUTTE | Tuya of INDIAN HEAVEN | USA (Washington) | |
| LONG ISLAND | Complex volcano | Historical | Northeast of New Guinea |
| LONG VALLEY | Caldera | Pleistocene-Fumarolic | USA (California) |
| LONGAVI, NEVADO DE | Stratovolcano | Radiocarbon | Central Chile & Argentina |
| LONGGANG GROUP | Cinder cones | Radiocarbon | China (eastern) |
| LONGHUSHAN | Cone of TENGCHONG | Southeast Asia | |
| LONGHUXIAOSHAN | Cone of TENGCHONG | Southeast Asia | |
| LONGLANG | Pyroclastic Cone of HAINAN DAO | Southeast Asia | |
| LONGONOT | Stratovolcano | Anthropology | Africa (eastern) |
| LONGTAN | Cone of TENGCHONG | Southeast Asia | |
| LONGUEN, NEVADO DE | Synonym of LONGAVI, NEVADO DE | Central Chile & Argentina | |
| LONGWAN GROUP | Synonym of LONGGANG GROUP | China (eastern) | |
| LONPUIMAY | Synonym of LONQUIMAY | Central Chile & Argentina | |
| LONQUEN, NEVADO DE | Synonym of LONGAVI, NEVADO DE | Central Chile & Argentina | |
| LONQUIMAY | Stratovolcano | Historical | Central Chile & Argentina |
| LOOKOUT BUTTE | Cone of CRATER LAKE | USA (Oregon) | |
| LOOKOUT BUTTE | Cone of MEDICINE LAKE | USA (California) | |
| LOOKOUT BUTTE | Dome of YELLOWSTONE | USA (Wyoming) | |
| LOOKOUT MOUNTAIN | Shield volcano of BACHELOR | USA (Oregon) | |
| LOOKOUT MOUNTAIN | Dome of LONG VALLEY | USA (California) | |
| LOOLSUNI | Synonym of WURLALI | Banda Sea | |
| LOOWIT BOULDER BASIN HOT SPRINGS | Thermal Feature of ST. HELENS | USA (Washington) | |
| LOOWIT SOURCE HOT SPRINGS | Thermal Feature of ST. HELENS | USA (Washington) | |
| LOOWIT TRAVERTINE HOT SPRINGS | Thermal Feature of ST. HELENS | USA (Washington) | |
| LOOWITLATKLA | Synonym of ST. HELENS | USA (Washington) | |
| LOPATINA (LOPUTIN) | Cinder cone of VITIM PLATEAU | Russia (southeastern) | |
| LOPEVI | Stratovolcano | Historical | Vanuatu |
| LOPEX DE VILLALOBOS, CERRO | Dome of BARCENA | México | |
| LORETO, CERRO | Cone of CHICHINAUTZIN | México | |
| LORUSIO HOT SPRINGS | Thermal Feature of SILALI | Africa (eastern) | |
| LOS | See proper name (e.g. VOTOS, LOS) | Spanish for THE | |
| LOSETOM | Tuff cone of EMURUANGOGOLAK | Africa (eastern) | |
| LOSOLAVA-TARASAG | Cone of GAUA | Vanuatu | |
| LOST JIM | Cone of IMURUK LAKE | Alaska (western) | |
| LOST LAKE GROUP | Cinder cone of SAND MOUNTAIN FIELD | USA (Oregon) | |
| LOST WOMAN | Cone of ZUNI-BANDERA | USA (New Mexico) | |
| LOTIGELLI | Cone of KILIMANJARO | Africa (eastern) | |
| LOT'S WIFE | Former crater of WHITE ISLAND | New Zealand | |
| LOT'S WIFE ROCK | Synonym of SOFUGAN | Izu, Volcano, & Mariana Islands | |
| LOU | Synonym of ST. ANDREW STRAIT | Admiralty Islands | |
| LOUCHADIERE, PUY DE | Cone of CHAINE DES PUYS | Western Europe | |
| LOUSE | Synonym of MENDELEEV | Kuril Islands | |
| LOW ISLAND | Cone of HANISH | Africa (northeastern) & Red Sea | |
| LOW ISLAND | Cone of ZUBAIR, JEBEL | Africa (northeastern) & Red Sea | |
| LOWER CHINDWIN | Volcanic field | Holocene? | Southeast Asia |
| LOWER GEYSER BASIN | Thermal Feature of YELLOWSTONE | USA (Wyoming) | |
| LOWER GLACIER VALLEY | Thermal Feature of MAKUSHIN | Aleutian Islands | |
| LOWER MARUANOT | Thermal Feature of PINATUBO | Luzon | |
| LOWETOBI | Synonym of LEWOTOBI | Lesser Sunda Islands | |
| LOWULLO BUTTE | Cone of NEWBERRY | USA (Oregon) | |
| LUA | See proper name (e.g. HOHONU, LUA) | Hawaiian for CRATER | |
| LUA-O-FAFINE | Cone of UPOLU | Samoan & Wallis Islands | |
| LUA-O-TANE | Cone of UPOLU | Samoan & Wallis Islands | |
| LUALAITITI | Pit crater of TA'U | Samoan & Wallis Islands | |
| LUAMAKAMI | Cone of HUALALAI | Hawaiian Islands | |
| LUATELE | Shield volcano of TA'U | Samoan & Wallis Islands | |
| LUBUK RAJA | Synonym of LUBUKRAYA | Sumatra | |
| LUBUKRAYA | Stratovolcano | Holocene? | Sumatra |
| LUBWA | Dome of NYAMBENI HILLS | Africa (eastern) | |
| LUCIFER HILL | Cone of CANDLEMAS ISLAND | Antarctica & South Sandwich Islands | |
| LUDENT | Tuff ring of KRAFLA | Iceland (northeastern) | |
| LUDENTSBORGIR | Crater Row of KRAFLA | Iceland (northeastern) | |
| LUGAD | Crater of KANLAON | Central Philippines | |
| LUGUGUGUT [ANDREW'S CONE] | Stratovolcano of BARRIER, THE | Africa (eastern) | |
| LUISE | Stratovolcano of LIHIR | New Ireland | |
| LUJONGO | Crater of BUNYARUGURU | Africa (central) | |
| LUKOVITSA | Dome of GAMCHEN | Kamchatka Peninsula | |
| LUKUKA | Cone of KARISIMBI | Africa (central) | |
| LULUKAN | Synonym of LATUKAN | Mindanao | |
| LUMANTO, CERRO | Cinder cone of CARRAN-LOS VENADOS | Central Chile & Argentina | |
| LUMBUNG SELAJUR [LUMBUNG SELAYUR] | Crater of LAWU | Java | |
| LUMBUNG SELAYUR | Crater of LAWU | Java | |
| LUMRUN BUTTE | Cinder cone of BACHELOR | USA (Oregon) | |
| LUMUT BALAI, BUKIT | Stratovolcano ? | Fumarolic | Sumatra |
| LUMUT, BUKIT | Stratovolcano of LUMUT BALAI, BUKIT | Sumatra | |
| LUMUTDAUN, BUKIT | Synonym of DAUN, BUKIT | Sumatra | |
| LUN-ULA | Cone of DARIGANGA VOLCANIC FIELD | Mongolia | |
| LUNA BUTTE | Cone of NEWBERRY | USA (Oregon) | |
| LUNA, VOLCAN LA | Crater of PINACATE | México | |
| LUNAIYIR, HARRAT | Synonym of LUNAYYIR, HARRAT | Arabia | |
| LUNAYYIR, HARRAT | Volcanic field | Historical | Arabia |
| LUNG-WAN GROUP | Synonym of LONGGANG GROUP | China (eastern) | |
| LUOGANGLING | Cone of LEIZHOU BANDAO | Southeast Asia | |
| LURBUN | Cinder cone of UDOKAN PLATEAU | Russia (southeastern) | |
| LURUS | Complex volcano | Holocene? | Java |
| LUSIBA | Crater of RUNGWE | Africa (eastern) | |
| LUSITOBE NORTH | Crater of ILIWERUNG | Lesser Sunda Islands | |
| LUSITOBE SOUTH | Crater of ILIWERUNG | Lesser Sunda Islands | |
| LUXSAR, CERRO | Stratovolcano of PAMPA LUXSAR | Northern Chile, Bolivia & Argentina | |
| LVINAYA PAST | Stratovolcano | Radiocarbon | Kuril Islands |
| L'VINAYA PASTI | Synonym of LVINAYA PAST | Kuril Islands | |
| LYESKOV ISLAND | Synonym of LESKOV ISLAND | Antarctica & South Sandwich Islands | |
| LYONS PEAK | Cone of MEDICINE LAKE | USA (California) | |
| LYSUHOLL | Pyroclastic cones | Holocene | Iceland (western) |
| LYSUHYRNA | Vent of LYSUHOLL | Iceland (western) | |
| LYSUSKARD | Synonym of LYSUHOLL | Iceland (western) | |
| MA ALALTA | Stratovolcano | Holocene | Africa (northeastern) & Red Sea |
| MAALSOM | Thermal Feature of ISAROG | Luzon | |
| MAANLING | Pyroclastic Cone of HAINAN DAO | Southeast Asia | |
| MAANSHAN | Pyroclastic Cone of HAINAN DAO | Southeast Asia | |
| MAANSHAN | Cinder cone of TENGCHONG | Southeast Asia | |
| MAAR | See proper name (e.g. ESTIVADOUX, MAAR D') | ||
| MAASOK | Thermal Feature of CAGUA | Luzon | |
| MABDA | Dome of DUBBI | Africa (northeastern) & Red Sea | |
| MABILOG, MT. | Cone of SAN PABLO VOLCANIC FIELD | Luzon | |
| MABOLLO SPRING | Thermal Feature of APO | Mindanao | |
| MABUANI | Cone of CHYULU HILLS | Africa (eastern) | |
| MACA | Stratovolcano | Radiocarbon | Southern Chile & Argentina |
| MACANZE, CERRO | Cinder cone of GUAZAPA | El Salvador & Honduras | |
| MACAQUE, MORNE [MICOTRIN] | Dome of TROIS PITONS, MORNE | West Indies | |
| MACAS, VOLCAN DE | Synonym of SANGAY | Ecuador | |
| MACAULEY ISLAND | Caldera | Radiocarbon | Kermadec Islands |
| MACCOTTA, CUDDIA | Shield volcano of PANTELLERIA | Italy | |
| MACDONALD | Submarine volcano | Historical | Pacific Ocean (central) |
| MACDOUGAL | Maar of PINACATE | México | |
| MACEY CONE | Cone of HEARD | Indian Ocean (southern) | |
| MACHEKH | Crater of GROZNY GROUP | Kuril Islands | |
| MACHEKHA [MACHEKH] | Crater of GROZNY GROUP | Kuril Islands | |
| MACHIN | Stratovolcano | Radiocarbon | Colombia |
| MACHIOTO | Dome of SW USANGU BASIN | Africa (eastern) | |
| MACHMEL RIVER | Cone of SILVERTHRONE | Canada | |
| MACHUCA | Synonym of PUTANA | Northern Chile, Bolivia & Argentina | |
| MACICO DA AGUALVA [GUILHERME MONIZ] | Stratovolcano of TERCEIRA | Azores | |
| MACKENNEY | Cone of PACAYA | Guatemala | |
| MACOLOD | Stratovolcano of TAAL | Luzon | |
| MACON, CERROS DE | Stratovolcano of PURICO COMPLEX | Northern Chile, Bolivia & Argentina | |
| MACOUBA, MORNE | Crater of PELEE | West Indies | |
| MACUTURIN (MACUTUSING) | Synonym of MAKATURING | Mindanao | |
| MADAHRAUN | Fissure vent of BARDARBUNGA | Iceland (northeastern) | |
| MADDEN'S MOUNT | Dome of NEVIS PEAK | West Indies | |
| MADEIRA | Shield volcano | Radiocarbon | Azores |
| MADELEINE | Dome of SOUFRIERE GUADELOUPE | West Indies | |
| MADERA, LA | Synonym of MADERAS | Nicaragua | |
| MADERAS | Stratovolcano | Holocene | Nicaragua |
| MADIENA, BUKIT [BUKIT KERAMAT] | Cone of GAMALAMA | Halmahera | |
| MADIERA | Synonym of MADEIRA | Azores | |
| MADILOGO | Pyroclastic cone | Holocene | New Guinea & D'Entrecasteaux Islands |
| MADINAH, HARRAT [HARRAT RASHID] | Volcanic field of RAHAT, HARRAT | Arabia | |
| MADREPORE | Submarine vent of CAMPI FLEGREI MAR SICILIA | Italy | |
| MADRON, EL | Dome of PRIMAVERA, SIERRA LA | México | |
| MAE-DAKE | Dome of KUCHINO-SHIMA | Ryukyu Islands & Kyushu | |
| MAE-DAKE [MAYU-YAMA] | Dome of UNZEN | Ryukyu Islands & Kyushu | |
| MAE-TOKACHI-DAKE | Stratovolcano of TOKACHI | Hokkaido | |
| MAE-YAMA | Dome of NUMAZAWA | Honshu | |
| MAEEBOSHI-DAKE | Stratovolcano of ZAO | Honshu | |
| MAEGA-TAKE | Stratovolcano of ADATARA | Honshu | |
| MAEKAKE-YAMA | Stratovolcano of ASAMA | Honshu | |
| MAELIFELLSHRAUN | Fissure vent of KATLA | Iceland (southern) | |
| MAENIR | Dome of KERLINGARFJOLL | Iceland (southwestern) | |
| MAESTRAS, LAS | Maar of CALATRAVA VOLCANIC FIELD | Western Europe | |
| MAFANE | Cone of SAVAI'I | Samoan & Wallis Islands | |
| MAFRA, PICO DE | Cone of SETE CIDADES | Azores | |
| MAFURA CRATERS | Crater of BUNYARUGURU | Africa (central) | |
| MAGA | Cone of SAVAI'I | Samoan & Wallis Islands | |
| MAGA POINT | Cone of OFU-OLOSEGA | Samoan & Wallis Islands | |
| MAGADINI | Cone of KILIMANJARO | Africa (eastern) | |
| MAGASO (MAGASU) | Synonym of CUERNOS DE NEGROS | Central Philippines | |
| MAGASU | Synonym of RAGANG | Mindanao | |
| MAGDGO | Crater of BUNYARUGURU | Africa (central) | |
| MAGEIK | Stratovolcano | Radiocarbon | Alaska Peninsula |
| MAGNE, CRATERE | Crater of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| MAGNETO, EL | Cone of CAYUTUE-LA VIGUERIA | Southern Chile & Argentina | |
| MAGOLO | Cone of MATUTUM | Mindanao | |
| MAGRAFIL | Thermal Feature of CAGUA | Luzon | |
| MAGSUYUAN | Dome of PACO | Mindanao | |
| MAGUSA-DAKE | Stratovolcano of KURIKOMA | Honshu | |
| MAGUSKIN | Cinder cone of TOLBACHIK | Kamchatka Peninsula | |
| MAHAGNAO | Stratovolcano | Fumarolic | Central Philippines |
| MAHAGNAW | Synonym of MAHAGNAO | Central Philippines | |
| MAHAMERU | Synonym of SEMERU | Java | |
| MAHATUA, VOLCAN | Pyroclastic Cone of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| MAHAWOE | Synonym of MAHAWU | Sulawesi | |
| MAHAWU | Stratovolcano | Historical | Sulawesi |
| MAHENGETANG | Synonym of BANUA WUHU | Sangihe Islands | |
| MAHOE, PUU | Cone of HALEAKALA | Hawaiian Islands | |
| MAHOKDUM | Crater of PACO | Mindanao | |
| MAIDEN HILL | Cone of NEWER VOLCANICS PROV | Australia | |
| MAILE | Cone of SAVAI'I | Samoan & Wallis Islands | |
| MAILE, PUU | Cone of HALEAKALA | Hawaiian Islands | |
| MAILLARD | Crater of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| MAIN CRATER | Crater of EREBUS | Antarctica & South Sandwich Islands | |
| MAIN ENDEAVOUR | Thermal Feature of ENDEAVOUR RIDGE | Pacific Ocean (northern) | |
| MAINIT [MAQUILING] | Stratovolcano of SAN PABLO VOLCANIC FIELD | Luzon | |
| MAINIT HOT SPRINGS | Thermal Feature of BANAHAW | Luzon | |
| MAIORO | Synonym of MEDVEZHIA | Kuril Islands | |
| MAIPO | Caldera | Historical | Central Chile & Argentina |
| MAIPO | Synonym of SAN JOSE | Central Chile & Argentina | |
| MAIPU | Synonym of MAIPO | Central Chile & Argentina | |
| MAIPU | Synonym of SAN JOSE | Central Chile & Argentina | |
| MAISH NUNATAK | Cone of HUDSON MOUNTAINS | Antarctica & South Sandwich Islands | |
| MAITARA | Cone of TIDORE | Halmahera | |
| MAITEI | Cone of NYAMBENI HILLS | Africa (eastern) | |
| MAITLAND, MOUNT | Stratovolcano of ST. CATHERINE | West Indies | |
| MAJADAS, LAS | Stratovolcano of SANTA MARIA | Guatemala | |
| MAJAIJAI | Synonym of BANAHAW | Luzon | |
| MAJDEL SHAMS | Cone of GOLAN HEIGHTS | Syria | |
| MAJI JA MOTO | Synonym of MAY-YA-MOTO | Africa (central) | |
| MAJUA, MONTANA | Dome of TENERIFE | Canary Islands | |
| MAKALIA, MT. | Shield volcano of DAKATAUA | New Britain | |
| MAKANAKA, PUU | Cone of MAUNA KEA | Hawaiian Islands | |
| MAKATITI | Dome of OKATAINA | New Zealand | |
| MAKATURING | Stratovolcano | Historical | Mindanao |
| MAKHAHNAS | Submarine vent of FARALLON DE PAJAROS | Izu, Volcano, & Mariana Islands | |
| MAKIAN | Stratovolcano | Historical | Halmahera |
| MAKILING [MAQUILING] | Stratovolcano of SAN PABLO VOLCANIC FIELD | Luzon | |
| MAKILING, MT. | Stratovolcano of TAAL | Luzon | |
| MAKINKU [MWAILO] | Cone of CHYULU HILLS | Africa (eastern) | |
| MAKINOTO | Thermal Feature of KUJU | Ryukyu Islands & Kyushu | |
| MAKJAN | Synonym of MAKIAN | Halmahera | |
| MAKKO-DAI | Stratovolcano of SUWANOSE-JIMA | Ryukyu Islands & Kyushu | |
| MAKLAKS CRATER | Cinder cone of CRATER LAKE | USA (Oregon) | |
| MAKOME | Tuff cone of FORT PORTAL | Africa (central) | |
| MAKOUCHINE | Synonym of MAKUSHIN | Aleutian Islands | |
| MAKUA, PUU | Cone of HALEAKALA | Hawaiian Islands | |
| MAKULOT [MACOLOD] | Stratovolcano of TAAL | Luzon | |
| MAKUOPUHI | Pit crater of KILAUEA | Hawaiian Islands | |
| MAKUSHIN | Stratovolcano | Historical | Aleutian Islands |
| MAKUSHIN VALLEY | Thermal Feature of MAKUSHIN | Aleutian Islands | |
| MAKUWAN-CHISAPPU | Dome of KUTCHARO | Hokkaido | |
| MAKUWAN-TISAPPU [MAKUWAN-CHISAPPU] | Dome of KUTCHARO | Hokkaido | |
| MAKWET | Cone of OKU VOLCANIC FIELD | Africa (western) | |
| MAKYAN | Synonym of MAKIAN | Halmahera | |
| MALABAR | Stratovolcano | Holocene? | Java |
| MALABSING, MT. | Dome of CAMIGUIN DE BABUYANES | North of Luzon | |
| MALACARA | Cinder cone of CHINGO | Guatemala | |
| MALACARA | Cinder cone of SINGUIL, CERRO | El Salvador & Honduras | |
| MALACARA | Stratovolcano of SANTA ANA | El Salvador & Honduras | |
| MALACATE, CERRO EL | Cone of ZITACUARO-VALLE DE BRAVO | México | |
| MALAGSOM, LAKE | Crater of MAHAGNAO | Central Philippines | |
| MALAIA SEMIACHIK | Synonym of MALY SEMIACHIK | Kamchatka Peninsula | |
| MALAIA UDINA [MALAYA UDINA] | Stratovolcano of UDINA | Kamchatka Peninsula | |
| MALALA, MOUNT [MT. MAKALIA] | Shield volcano of DAKATAUA | New Britain | |
| MALANG | Crater of TANGKUBANPARAHU | Java | |
| MALANG II, GUNUNG | Cone of SLAMET | Java | |
| MALANG PLAIN | Maars | Holocene | Java |
| MALANG, GUNUNG | Cone of SLAMET | Java | |
| MALASPINA | Synonym of KANLAON | Central Philippines | |
| MALAYA PLOSKAYA [KRESTOVSKY] | Stratovolcano of USHKOVSKY | Kamchatka Peninsula | |
| MALAYA UDINA | Stratovolcano of UDINA | Kamchatka Peninsula | |
| MALENKIY | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| MALEN'KY | Cone of BOLSHOI SEMIACHIK | Kamchatka Peninsula | |
| MALENKY | Cinder cone of TOLBACHIK | Kamchatka Peninsula | |
| MALESPINA | Synonym of KANLAON | Central Philippines | |
| MALETTO, MONTE | Cinder cone of ETNA | Italy | |
| MALGRETOUTE | Dome of QUALIBOU | West Indies | |
| MALHA | Maar of MEIDOB VOLCANIC FIELD | Africa (northern) | |
| MALHEUR MAAR | Maar of DIAMOND CRATERS | USA (Oregon) | |
| MALINAO | Stratovolcano | Pleistocene-Fumarolic | Luzon |
| MALINCHE, CERRO DE LA | Cone of SAN BORJA VOLCANIC FIELD | México | |
| MALINCHE, LA | Stratovolcano | Radiocarbon | México |
| MALINDANG | Stratovolcano | Holocene | Mindanao |
| MALINDIG | Stratovolcano | Hot Springs | Luzon |
| MALIOTA | Cone of UPOLU | Samoan & Wallis Islands | |
| MALISBOG | Thermal Feature of SILAY | Central Philippines | |
| MALISHI | Cinder cone of TOLBACHIK | Kamchatka Peninsula | |
| MALITAWAN | Stratovolcano of BILIRAN | Central Philippines | |
| MALJA GLAT | Dome of METHANA | Greece | |
| MALJA KHORIOU | Dome of METHANA | Greece | |
| MALJA SKURTI | Dome of METHANA | Greece | |
| MALJSA | Dome of METHANA | Greece | |
| MALLAHLE | Stratovolcano | Holocene? | Africa (northeastern) & Red Sea |
| MALLALI | Synonym of MALLAHLE | Africa (northeastern) & Red Sea | |
| MALLARD LAKE | Dome of YELLOWSTONE | USA (Wyoming) | |
| MALLOLA, VOLCA | Cone of OLOT VOLCANIC FIELD | Western Europe | |
| MALO | Cone of LOLOBAU | New Britain | |
| MALO PASSO | Vent of STROMBOLI | Italy | |
| MALOBAGO | Dome of BULUSAN | Luzon | |
| MALOBU, MOUNT [MALOPU] | Cone of SULU RANGE | New Britain | |
| MALOEPANG MAGIWE [MALUPANG MAGIWE] | Crater of DUKONO | Halmahera | |
| MALOEPANG WARIANG [MALUPANG WARIANG] | Stratovolcano of DUKONO | Halmahera | |
| MALOPU, MOUNT | Cone of SULU RANGE | New Britain | |
| MALPAIS | Synonym of MICHOACAN-GUANAJUATO | México | |
| MALPAIS VOLC FIELD | Synonym of ZUNI-BANDERA | USA (New Mexico) | |
| MALPAIS, CERRO | Dome of MASCOTA VOLCANIC FIELD | México | |
| MALPAIS, CERRO [CERRO EL BRUJO] | Shield volcano of SERDAN-ORIENTAL | México | |
| MALPAIS, THE | Synonym of CARRIZOZO | USA (New Mexico) | |
| MALPAIS, VOLCAN | Cinder cone of MASCOTA VOLCANIC FIELD | México | |
| MALPASILLO | Maar of PILAS, LAS | Nicaragua | |
| MALPASO | Cinder cone of HIERRO | Canary Islands | |
| MALUATIA | Cone of TA'U | Samoan & Wallis Islands | |
| MALUPANG MAGIWE | Crater of DUKONO | Halmahera | |
| MALUPANG WARIANG | Stratovolcano of DUKONO | Halmahera | |
| MALY PAYALPAN | Shield volcanoes | Holocene? | Kamchatka Peninsula |
| MALY SEMIACHIK | Synonym of KARYMSKY | Kamchatka Peninsula | |
| MALY SEMIACHIK | Caldera | Historical | Kamchatka Peninsula |
| MALY SEMYACHIK | Synonym of MALY SEMIACHIK | Kamchatka Peninsula | |
| MALYI SITKIN | Synonym of LITTLE SITKIN | Aleutian Islands | |
| MALYJ SEMJATSCHIK | Synonym of MALY SEMIACHIK | Kamchatka Peninsula | |
| MALYSH | Cone of GROZNY GROUP | Kuril Islands | |
| MALYSH | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| MAMANE, PUU | Cone of HALEAKALA | Hawaiian Islands | |
| MAMAON | Dome of LEONARD RANGE | Mindanao | |
| MAMBACHO | Synonym of MOMBACHO | Nicaragua | |
| MAMBAJAO | Stratovolcano of CAMIGUIN | Mindanao | |
| MAMELON CENTRAL | Former dome of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| MAMMAMUR | Synonym of MANAM | Northeast of New Guinea | |
| MAMMOTH CRATER | Crater of MEDICINE LAKE | USA (California) | |
| MAMMOTH HOT SPRINGS | Thermal Feature of YELLOWSTONE | USA (Wyoming) | |
| MAMMOTH KNOLLS | Dome of MAMMOTH MOUNTAIN | USA (California) | |
| MAMMOTH MOUNTAIN | Lava domes | Radiocarbon | USA (California) |
| MAMMOTH MOUNTAIN FUMAROLE | Thermal Feature of LONG VALLEY | USA (California) | |
| MAMOT | Thermal Feature of PINATUBO | Luzon | |
| MAMRUT DAGH | Synonym of NEMRUT DAGI | Turkey | |
| MAMUIL MALAL | Dome of LANIN | Central Chile & Argentina | |
| MAMUJA, GUNUNG [GUNUNG MAMUYA] | Stratovolcano of DUKONO | Halmahera | |
| MAMUYA, GUNUNG | Stratovolcano of DUKONO | Halmahera | |
| MANA [MANNA] | Dome of MANAGLASE PLATEAU | New Guinea & D'Entrecasteaux Islands | |
| MANACAGAN [KASIBOI] | Cone of MAHAGNAO | Central Philippines | |
| MANAGLASE PLATEAU | Volcanic field | Anthropology | New Guinea & D'Entrecasteaux Islands |
| MANAM | Stratovolcano | Historical | Northeast of New Guinea |
| MANAMUR | Synonym of MANAM | Northeast of New Guinea | |
| MANANTIAL, VOLCAN DEL | Synonym of PEINADO | Northern Chile, Bolivia & Argentina | |
| MANA'OMIA | Cone of SAVAI'I | Samoan & Wallis Islands | |
| MANAREYJAR | Submarine vent of TJORNES FRACTURE ZONE | Iceland (northeastern) | |
| MANAREYJAR RIDGE | Synonym of TJORNES FRACTURE ZONE | Iceland (northeastern) | |
| MANARING | Thermal Feature of CAGUA | Luzon | |
| MANARO NGORU | Crater of AOBA | Vanuatu | |
| MANAT | Thermal Feature of LEONARD RANGE | Mindanao | |
| MANATIAL PELADO | Stratovolcano of DESCABEZADO GRANDE | Central Chile & Argentina | |
| MANCHAS, LAS [LLANO DEL BANCO] | Fissure vent of LA PALMA | Canary Islands | |
| MANDA HARARO | Shield volcanoes | Historical | Africa (northeastern) & Red Sea |
| MANDA-INAKIR | Fissure vents | Historical | Africa (northeastern) & Red Sea |
| MANDALAGAN | Complex volcano | Fumarolic | Central Philippines |
| MANDANJI | Dome of KIEYO | Africa (eastern) | |
| MANDASAWU, GUNUNG [POCOK MANDOSAWU] | Dome of RANAKAH | Lesser Sunda Islands | |
| MANDASOWU, GUNUNG | Cone of RANAKAH | Lesser Sunda Islands | |
| MANDEGUGUSU | Synonym of SIMBO | Bougainville & Solomon Islands | |
| MANDOSAWU, POCOK | Dome of RANAKAH | Lesser Sunda Islands | |
| MANENGOUBA | Stratovolcano | Holocene? | Africa (western) |
| MANENGUBA | Synonym of MANENGOUBA | Africa (western) | |
| MANGA AFI [MAUGA AFI] | Fissure vent of SAVAI'I | Samoan & Wallis Islands | |
| MANGA-MA-LOBA | Synonym of CAMEROON | Africa (western) | |
| MANGANAMU | Dome of TAUPO | New Zealand | |
| MANGATOETOE | Dome of MAROA | New Zealand | |
| MANGATUTU | Dome of MAROA | New Zealand | |
| MANGAWHAKAMANA | Dome of OKATAINA | New Zealand | |
| MANGERE LAGOON | Tuff ring of AUCKLAND FIELD | New Zealand | |
| MANGERE MOUNTAIN | Cone of AUCKLAND FIELD | New Zealand | |
| MANGINANGINA | Cone of KAIKOHE-BAY OF ISLANDS | New Zealand | |
| MANGUF | Cone of MEGA BASALT FIELD | Africa (northeastern) & Red Sea | |
| MANITA, LA | Lava cone of TIGRE, EL | El Salvador & Honduras | |
| MANITO | Thermal Feature of POCDOL MOUNTAINS | Luzon | |
| MANLAYAO | Synonym of PACO | Mindanao | |
| MANNA | Dome of MANAGLASE PLATEAU | New Guinea & D'Entrecasteaux Islands | |
| MANO DE DIABLO | Cone of RECLUS | Southern Chile & Argentina | |
| MANOEK | Synonym of MANUK | Banda Sea | |
| MANOEK, KAWAH [KAWAH MANUK] | Thermal Feature of KENDANG | Java | |
| MANOELALOE [MANULALU] | Cone of INIERIE | Lesser Sunda Islands | |
| MANOKAMI-DAKE | Stratovolcano of ZAO | Honshu | |
| MANTECA | Cinder cone of CHICHINAUTZIN | México | |
| MANTHE, MOUNT | Stratovolcano of HUDSON MOUNTAINS | Antarctica & South Sandwich Islands | |
| MANU, LUA | Pit crater of KILAUEA | Hawaiian Islands | |
| MANUK | Stratovolcano | Fumarolic | Banda Sea |
| MANUK, KAWAH | Thermal Feature of WAYANG-WINDU | Java | |
| MANUK, KAWAH | Thermal Feature of PAPANDAYAN | Java | |
| MANUK, KAWAH | Thermal Feature of KENDANG | Java | |
| MANUK, KAWAH | Thermal Feature of KAMOJANG, KAWAH | Java | |
| MANUKA | Cone of TAVEUNI | Fiji Islands | |
| MANULALU | Cone of INIERIE | Lesser Sunda Islands | |
| MANUM (MANUN) | Synonym of MANAM | Northeast of New Guinea | |
| MANUMUDAR | Synonym of MANAM | Northeast of New Guinea | |
| MANUPIRUA SPRINGS | Thermal Feature of ROTORUA | New Zealand | |
| MANUREWA | Cone of AUCKLAND FIELD | New Zealand | |
| MANYATTA [SAMPU OLKUO] | Cinder cone of SUSWA | Africa (eastern) | |
| MANZA HOT SPRINGS | Thermal Feature of KUSATSU-SHIRANE | Honshu | |
| MANZAZ VOLCANIC FIELD | Scoria cones | Holocene | Africa (northern) |
| MAONIU SHAN | Cinder cone of KUNLUN VOLCANIC GROUP | China (western) | |
| MAQUILAN [MAQUILING] | Stratovolcano of SAN PABLO VOLCANIC FIELD | Luzon | |
| MAQUILING | Stratovolcano of SAN PABLO VOLCANIC FIELD | Luzon | |
| MAR, PUIG DE | Cone of OLOT VOLCANIC FIELD | Western Europe | |
| MAR, RIO | Crater of VALLE, EL | Panamá | |
| MARAEMANUKA | Dome of MAROA | New Zealand | |
| MARAGONG-ONG | Dome of PACO | Mindanao | |
| MARAPI | Complex volcano | Historical | Sumatra |
| MARAWER SPRING | Thermal Feature of APO | Mindanao | |
| MARBAS | Cinder cone of HUAMBO | Perú | |
| MARBAS CHICO | Cinder cone of HUAMBO | Perú | |
| MARBAS GRANDE, CERRO | Cinder cone of HUAMBO | Perú | |
| MARCA, LOMA LA | Dome of PULULAGUA | Ecuador | |
| MARCH | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| MARCHENA | Shield volcano | Historical | Galápagos Islands |
| MARCIANA, VALLE | Maar of ALBAN HILLS | Italy | |
| MARCO, CRATERE | Crater of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| MARCONDAS, PICA DAS | Dome of FURNAS | Azores | |
| MARDJA | Crater of NGAOUNDERE PLATEAU | Africa (western) | |
| MARE | Stratovolcano | Holocene | Halmahera |
| MARE | Cone of MOTI | Halmahera | |
| MARECOCCO | Dome of ISCHIA | Italy | |
| MAREOROA SPRINGS | Thermal Feature of ROTORUA | New Zealand | |
| MARETA, CALDERA DE LA | Crater of HIERRO | Canary Islands | |
| MARETA, LA | Cone of TENERIFE | Canary Islands | |
| MARGA BAJOER [MARGA BAYUR] | Thermal Feature of BESAR | Sumatra | |
| MARGA BAJUR [MARGA MAYUR] | Thermal Feature of BESAR | Sumatra | |
| MARGA BAYUR | Thermal Feature of BESAR | Sumatra | |
| MARGARITAS, VOLCANCITO | Cinder cone of MOYUTA | Guatemala | |
| MARHA, JABAL EL- | Tuff cone | Holocene? | Arabia |
| MARIANA, PICO DA | Cone of AGUA DE PAU | Azores | |
| MARIBAYA | Thermal Feature of TANGKUBANPARAHU | Java | |
| MARINAQUI, LAGUNA | Cinder cones | Holocene | Central Chile & Argentina |
| MARION ISLAND | Shield volcanoes | Historical | Indian Ocean (southern) |
| MARISHITEN | Crater of ON-TAKE | Honshu | |
| MARISHITEN | Crater of NORIKURA | Honshu | |
| MARIVELES | Stratovolcano | Radiocarbon | Luzon |
| MARKAGUNT PLATEAU | Volcanic field | Dendrochronology | USA (Utah) |
| MARKARFLJOT | Dome of TORFAJOKULL | Iceland (southern) | |
| MARLANGA | Synonym of MALINDIG | Luzon | |
| MARMOLEJO | Stratovolcano of SAN JOSE | Central Chile & Argentina | |
| MAROA | Calderas | Tephrochronology | New Zealand |
| MAROA NORTH | Dome of MAROA | New Zealand | |
| MAROA SOUTH | Dome of MAROA | New Zealand | |
| MAROA WEST | Dome of MAROA | New Zealand | |
| MAROANUI | Dome of MAROA | New Zealand | |
| MAROTIRI | Dome of TAUPO | New Zealand | |
| MAROUM [MARUM] | Crater of AMBRYM | Vanuatu | |
| MARQUES, CERRO EL | Cone of CHICHINAUTZIN | México | |
| MARRA, JEBEL | Volcanic field | Radiocarbon | Africa (northern) |
| MARSABIT | Shield volcano | Holocene? | Africa (eastern) |
| MARTANA, ISOLA | Cone of VULSINI | Italy | |
| MARTE | Crater of GALERAS | Colombia | |
| MARTELES, CALDERA DE | Maar of GRAN CANARIA | Canary Islands | |
| MARTIN | Stratovolcano | Historical | Alaska Peninsula |
| MARTIN [SAN MARTIN] | Cinder cone of LA PALMA | Canary Islands | |
| MARTINYA, PUIG DE | Cone of OLOT VOLCANIC FIELD | Western Europe | |
| MARU-YAMA | Stratovolcano of ASO | Ryukyu Islands & Kyushu | |
| MARU-YAMA | Cone of IZU-TOBU | Honshu | |
| MARU-YAMA | Cone of FUJI | Honshu | |
| MARU-YAMA | Dome of OSORE-YAMA | Honshu | |
| MARU-YAMA | Cone of AOGA-SHIMA | Izu, Volcano, & Mariana Islands | |
| MARU-YAMA | Cone of TOKACHI | Hokkaido | |
| MARU-YAMA | Dome of NIPESOTSU-MARUYAMA | Hokkaido | |
| MARU-YAMA | Dome of KUTCHARO | Hokkaido | |
| MARUATA | Cone of WHANGAREI | New Zealand | |
| MARUM | Crater of AMBRYM | Vanuatu | |
| MARUMLIGLAR | Crater of AMBRYM | Vanuatu | |
| MARUNO-YAMA | Cinder cone of IZU-TOBU | Honshu | |
| MARUOKA-YAMA | Cone of KIRISHIMA | Ryukyu Islands & Kyushu | |
| MARUSHIMA-YAMA | Dome of NII-JIMA | Izu, Volcano, & Mariana Islands | |
| MARUSIMA-YAMA [MARUSHIMA-YAMA] | Dome of NII-JIMA | Izu, Volcano, & Mariana Islands | |
| MARUYAMA | Cone of BANDAI | Honshu | |
| MARY BAY | Crater of YELLOWSTONE | USA (Wyoming) | |
| MARY'S GLORY | Stratovolcano of QUILL, THE | West Indies | |
| MARY'S POINT MOUNTAIN | Dome of SABA | West Indies | |
| MAS A TIERRA | Synonym of ROBINSON CRUSOE | Pacific Ocean (Chilean Islands) | |
| MAS, KAWAH | Thermal Feature of PAPANDAYAN | Java | |
| MASA | Cone of SAVAI'I | Samoan & Wallis Islands | |
| MASAKARI-YAMA | Synonym of EBEKO | Kuril Islands | |
| MASALAKOT | Dome of BANAHAW | Luzon | |
| MASARAGA | Stratovolcano | Holocene | Luzon |
| MASARANG | Cone of MAHAWU | Sulawesi | |
| MASATEPEQUE, CERRO | Cinder cone of SAN DIEGO | El Salvador & Honduras | |
| MASAYA | Caldera | Historical | Nicaragua |
| MASCOTA VOLCANIC FIELD | Cinder cones | Holocene | México |
| MASECHA | Crater of BUNYARUGURU | Africa (central) | |
| MASEM, KAWAH | Crater of SEMPU | Sulawesi | |
| MASHIGA | Cone of NYAMURAGIRA | Africa (central) | |
| MASHKOVTSEV | Stratovolcano | Holocene | Kamchatka Peninsula |
| MASHU | Caldera | Radiocarbon | Hokkaido |
| MASHUMANGABO | Cone of NYAMURAGIRA | Africa (central) | |
| MASIGIT | Crater of GUNTUR | Java | |
| MASIGIT | Crater of TALAGABODAS | Java | |
| MASIGIT, GUNUNG | Stratovolcano of KAMOJANG, KAWAH | Java | |
| MASIPELID | Dome of PACO | Mindanao | |
| MASKHORNE HILL | Dome of SABA | West Indies | |
| MASSAKO | Maar of KIEYO | Africa (eastern) | |
| MASSERIA BOSCO DEL MONACO | Vent of VESUVIUS | Italy | |
| MASSIF | See proper name (e.g. GUEYNEMER, MASSIF) | French for MOUNTAIN RANGE | |
| MASTEIRO, CALDEIRA | Crater of FLORES | Azores | |
| MASUAN | Synonym of MUSUAN | Mindanao | |
| MASYU | Synonym of MASHU | Hokkaido | |
| MAT ALA | Shield volcano | Holocene | Africa (northeastern) & Red Sea |
| MAT ALA | Crater of BORAWLI | Africa (northeastern) & Red Sea | |
| MATA AHOGADO | Crater of VALLE, EL | Panamá | |
| MATA DAS FEITICEIRAS | Cone of PICOS VOLCANIC SYSTEM | Azores | |
| MATA OLE AFI | Crater of SAVAI'I | Samoan & Wallis Islands | |
| MATA UTA | Tuff cone of WALLIS ISLANDS | Samoan & Wallis Islands | |
| MATA'AGA | Cone of SAVAI'I | Samoan & Wallis Islands | |
| MATABA | Dome of PINATUBO | Luzon | |
| MATAFA | Cone of SAVAI'I | Samoan & Wallis Islands | |
| MATAFAO | Dome of TUTUILA | Samoan & Wallis Islands | |
| MATAHAWRA | Dome of OKATAINA | New Zealand | |
| MATAKARUA | Cone of AUCKLAND FIELD | New Zealand | |
| MATALOKO | Thermal Feature of INIERIE | Lesser Sunda Islands | |
| MATALTEPE, CERRO | Cone of SUCHITAN | Guatemala | |
| MA'TAN, JABAL | Cone of RAHAT, HARRAT | Arabia | |
| MATANDING | Cinder cone of JOLO | Sulu Islands | |
| MATAULANO | Cinder cone of SAVAI'I | Samoan & Wallis Islands | |
| MATAVANU | Lava cone of SAVAI'I | Samoan & Wallis Islands | |
| MATEER | Crater of CAMEROON | Africa (western) | |
| MATHAIONI | Cone of CHYULU HILLS | Africa (eastern) | |
| MATHEU (MATHEW) | Synonym of MATTHEW ISLAND | Pacific Ocean (southwestern) | |
| MATI | Crater of ARJUNO-WELIRANG | Java | |
| MATI, LAKE | Maar of IBU | Halmahera | |
| MATIANKANINA | Cone of ITASY VOLCANIC FIELD | Indian Ocean (western) | |
| MATLALCUEYE [MATLACUEYATL] | Synonym of MALINCHE, LA | México | |
| MATSUGA-KUBO | Maar of IBUSUKI VOLCANIC FIELD | Ryukyu Islands & Kyushu | |
| MATSUGAMINE | Dome of NARUGO | Honshu | |
| MATSUKAWA | Thermal Feature of HACHIMANTAI | Honshu | |
| MATSUKAWA SPA | Thermal Feature of IWATE | Honshu | |
| MATSUWA JIMA | Synonym of SARYCHEV PEAK | Kuril Islands | |
| MATSUYAMAHANA | Dome of KOZU-SHIMA | Izu, Volcano, & Mariana Islands | |
| MATTHEW ISLAND | Stratovolcano | Historical | Pacific Ocean (southwestern) |
| MATUA JIMA | Synonym of SARYCHEV PEAK | Kuril Islands | |
| MATUFFA CRATER | Cone of MERU | Africa (eastern) | |
| MATUGAMINE [MATSUGAMINE] | Dome of NARUGO | Honshu | |
| MATUPI [TAVURVUR] | Stratovolcano of RABAUL | New Britain | |
| MATUPIT ISLAND | Cone of RABAUL | New Britain | |
| MATUTAN | Synonym of MATUTUM | Mindanao | |
| MATUTUM | Stratovolcano | Radiocarbon | Mindanao |
| MAU [LOBOA] | Stratovolcano of NORTH VATE | Vanuatu | |
| MAUG ISLANDS | Stratovolcano | Fumarolic | Izu, Volcano, & Mariana Islands |
| MAUGA AFI | Fissure vent of SAVAI'I | Samoan & Wallis Islands | |
| MAUGA ALI'I | Cone of UPOLU | Samoan & Wallis Islands | |
| MAUGA MU | Cinder cone of SAVAI'I | Samoan & Wallis Islands | |
| MAUGA SILISILI | Cinder cone of SAVAI'I | Samoan & Wallis Islands | |
| MAUGA-O-SAVAI'I | Cone of UPOLU | Samoan & Wallis Islands | |
| MAUGALOA | Cone of SAVAI'I | Samoan & Wallis Islands | |
| MAUGHAN, LAKE | Synonym of PARKER | Mindanao | |
| MAUI, PUU O | Cone of HALEAKALA | Hawaiian Islands | |
| MAULE, DOMOS DEL | Dome of MAULE, LAGUNA DEL | Central Chile & Argentina | |
| MAULE, LAGUNA DEL | Caldera | Holocene | Central Chile & Argentina |
| MAUNA HALEAKALA | Synonym of HALEAKALA | Hawaiian Islands | |
| MAUNA HINA | Cone of HALEAKALA | Hawaiian Islands | |
| MAUNA IKI | Shield volcano of KILAUEA | Hawaiian Islands | |
| MAUNA KEA | Shield volcano | Radiocarbon | Hawaiian Islands |
| MAUNA LOA | Shield volcano | Historical | Hawaiian Islands |
| MAUNA ULU | Shield volcano of KILAUEA | Hawaiian Islands | |
| MAUNGA | See proper name (e.g. KUMA, MAUNGA) | Polynesian for MT. | |
| MAUNGAITI | Dome of MAROA | New Zealand | |
| MAUNGAKAKARAMEA | Cone of OKATAINA | New Zealand | |
| MAUNGAKARAMEA | Cone of WHANGAREI | New Zealand | |
| MAUNGAKAWAKAWA | Cone of KAIKOHE-BAY OF ISLANDS | New Zealand | |
| MAUNGANAMU | Dome of TAUPO | New Zealand | |
| MAUNGAONGAONGA | Cone of OKATAINA | New Zealand | |
| MAUNGATAKETAKE | Cone of AUCKLAND FIELD | New Zealand | |
| MAUNGATAPERE | Cone of WHANGAREI | New Zealand | |
| MAUNGATUROTO | Cone of KAIKOHE-BAY OF ISLANDS | New Zealand | |
| MAUNU | Cone of WHANGAREI | New Zealand | |
| MAURAS, CERRO | Cinder cone of ANDAHUA-ORCOPAMPA | Perú | |
| MAURELLE ISLAND OF 1781 ? | Synonym of METIS SHOAL | Tonga Islands | |
| MAURICE AND KATIA KRAFFT CRATER | Crater of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| MAVAHLIDARGIGIR | Crater Row of KRISUVIK | Iceland (southwestern) | |
| MAVRO VOUNI | Dome of MILOS | Greece | |
| MAVROS KAVOS | Dome of MILOS | Greece | |
| MAWENZI | Stratovolcano of KILIMANJARO | Africa (eastern) | |
| MAWRA CREMNA | Thermal Feature of MILOS | Greece | |
| MAY-YA-MOTO | Fumarole field | Fumarolic | Africa (central) |
| MAYABOBO | Cone of BANAHAW | Luzon | |
| MAYAL, CERRO [VOLCAN SILLANEGRA] | Pyroclastic Cone of COCHIQUITO VOLCANIC GROUP | Central Chile & Argentina | |
| MAYE-YAMA [MAYU-YAMA] | Dome of UNZEN | Ryukyu Islands & Kyushu | |
| MAYON | Stratovolcano | Historical | Luzon |
| MAYONDON POINT | Cone of SAN PABLO VOLCANIC FIELD | Luzon | |
| MAYOR ISLAND | Shield volcano | Radiocarbon | New Zealand |
| MAYOR, PICO | Synonym of ACATENANGO | Guatemala | |
| MAYOTEPE, CERRO [CERRO MOYOTEPE] | Stratovolcano of SAN CRISTOBAL | Nicaragua | |
| MAYU-GATA | Crater of KOMAGA-TAKE | Hokkaido | |
| MAYU-YAMA | Dome of UNZEN | Ryukyu Islands & Kyushu | |
| MAZAMA, MT. | Synonym of CRATER LAKE | USA (Oregon) | |
| MAZATEPEC | Cone of CHICHINAUTZIN | México | |
| MAZHANG | Cone of LEIZHOU BANDAO | Southeast Asia | |
| MAZIK DAGI | Dome of NEMRUT DAGI | Turkey | |
| MAZO, MOUNT | Cinder cone of SAN QUINTIN VOLCANIC FIELD | México | |
| MAZO, VOLCAN DE [CALDERA ROJA DE MAZO] | Cinder cone of LANZAROTE | Canary Islands | |
| MAZRUB, JEBEL | Cone of BAYUDA VOLCANIC FIELD | Africa (northern) | |
| MAZTALOYA | Cone of HUMEROS, LOS | México | |
| MAZZACARUSO, MONTE | Stratovolcano of LIPARI | Italy | |
| MBATI | Cone of NYIRAGONGO | Africa (central) | |
| MBATNOU | Cone of OKU VOLCANIC FIELD | Africa (western) | |
| MBENUMBENU | Cone of TAVEUNI | Fiji Islands | |
| MBUELESU [MBWELESU] | Crater of AMBRYM | Vanuatu | |
| MBUGA | Tuff cone of KATWE-KIKORONGO | Africa (central) | |
| MBUYUNI | Cone of KILIMANJARO | Africa (eastern) | |
| MBUZI | Tuff cone of FORT PORTAL | Africa (central) | |
| MBWELESU | Crater of AMBRYM | Vanuatu | |
| MCALL KOP | Cone of PRINCE EDWARD ISLAND | Indian Ocean (southern) | |
| MCCARTYS | Fissure vent of ZUNI-BANDERA | USA (New Mexico) | |
| MCCAULEY SPRING | Thermal Feature of VALLES CALDERA | USA (New Mexico) | |
| MCCULLOCH PEAK | Former dome of BOGOSLOF | Aleutian Islands | |
| MCDONALD ISLANDS | Complex volcano | Historical | Indian Ocean (southern) |
| MCINTYRE, MT. | Cone of NEWER VOLCANICS PROV | Australia | |
| MCKAY BUTTE | Dome of NEWBERRY | USA (Oregon) | |
| MCKEE | Cone of WALLIS ISLANDS | Samoan & Wallis Islands | |
| MCKENZIE BUTTE | Dome of SHASTA | USA (California) | |
| MCKENZIE HIGHWAY LAVA FIELD | Synonym of BELKNAP | USA (Oregon) | |
| MCKINNEY BUTTE | Cone of SHOSHONE LAVA FIELD | USA (Idaho) | |
| MCLENNAN'S HILL | Cone of AUCKLAND FIELD | New Zealand | |
| MCLEOD HILL | Tuya of WELLS GRAY-CLEARWATER | Canada | |
| MCLOUGHLIN'S HILL [MATUKURUA] | Cone of AUCKLAND FIELD | New Zealand | |
| MCNISH BAY CONE | Tuff cone of PRINCE EDWARD ISLAND | Indian Ocean (southern) | |
| ME-AKAN | Stratovolcano of AKAN | Hokkaido | |
| ME-DAKE | Cone of AKITA-KOMAGA-TAKE | Honshu | |
| MEAGER | Complex volcano | Radiocarbon | Canada |
| MEAGER CREEK HOT SPRING | Thermal Feature of MEAGER | Canada | |
| MEAGER CREEK VOLC FIELD | Synonym of MEAGER | Canada | |
| MEDAM, JABAL | Crater of ARHAB, HARRA OF | Arabia | |
| MEDIA LUNA | Cinder cone of YEGUADA, LA | Panamá | |
| MEDIA LUNA, LA | Cinder cone of MASAYA | Nicaragua | |
| MEDIA LUNA, VOLCAN | Cone of CARRAN-LOS VENADOS | Central Chile & Argentina | |
| MEDIA MONTANA | Cone of TENERIFE | Canary Islands | |
| MEDICINE LAKE | Shield volcano | Radiocarbon | USA (California) |
| MEDICINE LAKE HIGHLAND | Synonym of MEDICINE LAKE | USA (California) | |
| MEDINA, HARRAT EL- [HARRAT RASHID] | Volcanic field of RAHAT, HARRAT | Arabia | |
| MEDIO, CERRO DEL [QUIZAPU] | Crater of AZUL, CERRO | Central Chile & Argentina | |
| MEDIO, CERRO EL | Dome of VALLES CALDERA | USA (New Mexico) | |
| MEDIO, CERRO EL | Cone of CALABOZOS | Central Chile & Argentina | |
| MEDJA [PUI] | Cone of IYA | Lesser Sunda Islands | |
| MEDNYI | Stratovolcano of TAO-RUSYR CALDERA | Kuril Islands | |
| MEDVEVEZHY | Stratovolcano of LEUTONGEY | Kamchatka Peninsula | |
| MEDVEZHIA | Somma volcano | Historical | Kuril Islands |
| MEDVEZHII | Stratovolcano of MEDVEZHIA | Kuril Islands | |
| MEDVEZHII | Stratovolcano of MEDVEZHIA | Kuril Islands | |
| MEERFELDER | Maar of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| MEETIA | Synonym of MEHETIA | Pacific Ocean (central) | |
| MEGA BASALT FIELD | Pyroclastic cones | Holocene | Africa (northeastern) & Red Sea |
| MEGALO VOUNO | Cinder cone of SANTORINI | Greece | |
| MEGALOS POLYBOTES [POLYVOTIS MEGALOS] | Vent of NISYROS | Greece | |
| MEGATA | Maars | Tephrochronology | Honshu |
| MEHETIA | Stratovolcano | Anthropology | Pacific Ocean (central) |
| MEIDOB VOLCANIC FIELD | Scoria cones | Holocene | Africa (northern) |
| MEIJI-SHINZAN | Dome of USU | Hokkaido | |
| MEIZI-SINZAN [MEIJI SHINZAN] | Dome of USU | Hokkaido | |
| MEJA [PUI] | Cone of IYA | Lesser Sunda Islands | |
| MEKE DAG | Cone of KARAPINAR FIELD | Turkey | |
| MEKEGOLU | Crater of KARAPINAR FIELD | Turkey | |
| MEKEOBRUK | Crater of KARAPINAR FIELD | Turkey | |
| MEKETIA | Synonym of MEHETIA | Pacific Ocean (central) | |
| MEKUNINAI | Cone of NISEKO | Hokkaido | |
| MELAMETE | Cone of CAMEROON | Africa (western) | |
| MELAN OROS | Synonym of SAWAD, HARRA ES- | Arabia | |
| MELATEN, GUNUNG | Cone of IJEN | Java | |
| MELAYU, BUKIT | Cone of GAMALAMA | Halmahera | |
| MELBOURNE | Stratovolcano | Tephrochronology | Antarctica & South Sandwich Islands |
| MELHOLL | Crater Row of REYKJANES | Iceland (southwestern) | |
| MELHOLL | Crater Row of KRISUVIK | Iceland (southwestern) | |
| MELIMOTO (MELIMOYA) | Synonym of MELIMOYU | Southern Chile & Argentina | |
| MELIMOYU | Stratovolcano | Radiocarbon | Southern Chile & Argentina |
| MELON, VOLCAN | Dome of MASCOTA VOLCANIC FIELD | México | |
| MELON, VOLCAN EL | Cinder cone of MICHOACAN-GUANAJUATO | México | |
| MELRAKKAHRAUN | Crater Row of KRISUVIK | Iceland (southwestern) | |
| MELUAK | Cone of KEMBAR | Sumatra | |
| MENCHECA | Stratovolcano of PUYEHUE-CORDON CAULLE | Central Chile & Argentina | |
| MENCO, CERRO EL | Cone of ZAPATERA | Nicaragua | |
| MENDANA | Cone of TINAKULA | Santa Cruz Islands | |
| MENDELEEV | Stratovolcano | Historical | Kuril Islands |
| MENDELEYEV | Synonym of MENDELEEV | Kuril Islands | |
| MENENGAI | Shield volcano | Tephrochronology | Africa (eastern) |
| MENJER | Crater of DIENG VOLCANIC COMPLEX | Java | |
| MENMARUBI | Vent of FUJI | Honshu | |
| MENNER | Shield volcano of GAMCHEN | Kamchatka Peninsula | |
| MENSHIY BRAT [MENSHOI BRAT] | Dome of MEDVEZHIA | Kuril Islands | |
| MENSHOI BRAT | Dome of MEDVEZHIA | Kuril Islands | |
| MENTOLAT | Stratovolcano | Historical | Southern Chile & Argentina |
| MENUMA | Crater of AZUMA | Honshu | |
| MERA LAVA | Synonym of MERE LAVA | Vanuatu | |
| MERAH, DANAU | Crater of SORIKMARAPI | Sumatra | |
| MERALAB | Synonym of MERE LAVA | Vanuatu | |
| MERAPI | Synonym of MARAPI | Sumatra | |
| MERAPI | Stratovolcano | Historical | Java |
| MERAPI | Stratovolcano of IJEN | Java | |
| MERBABOE | Synonym of MERBABU | Java | |
| MERBABU | Stratovolcano | Historical | Java |
| MERCADEL, MONTANA DE | Cinder cone of HIERRO | Canary Islands | |
| MERCIMEK TEPE | Cone of ACIGOL-NEVSEHIR | Turkey | |
| MERCOEUR, PUY DE | Cone of CHAINE DES PUYS | Western Europe | |
| MERDADA | Cone of DIENG VOLCANIC COMPLEX | Java | |
| MERDODO [MERDADA] | Cone of DIENG VOLCANIC COMPLEX | Java | |
| MERE LAVA | Stratovolcano | Holocene | Vanuatu |
| MERGI, GUNUNG | Cone of UNGARAN | Java | |
| MERKER KEGEL [ASH CONE] | Cone of MERU | Africa (eastern) | |
| MERKURHRAUN | Fissure vent of TORFAJOKULL | Iceland (southern) | |
| MERREM PEAK | Caldera of BERLIN | Antarctica & South Sandwich Islands | |
| MERRIAM CONE | Cinder cone of CRATER LAKE | USA (Oregon) | |
| MERRIAM POINT | Dome of CRATER LAKE | USA (Oregon) | |
| MERSIDAT | Cone of BAYUDA VOLCANIC FIELD | Africa (northern) | |
| MERU | Stratovolcano | Historical | Africa (eastern) |
| MESA DE HUANARUCUA | Lava cone of MICHOACAN-GUANAJUATO | México | |
| MESA DE SAN JERONIMO | Cone of ZITACUARO-VALLE DE BRAVO | México | |
| MESA DE ZIRIMONDIRO | Lava cone of MICHOACAN-GUANAJUATO | México | |
| MESA EL BOSQUE | Dome of AZUFRES, LOS | México | |
| MESA EL BURRO | Dome of PRIMAVERA, SIERRA LA | México | |
| MESA EL CARPINTERO | Dome of AZUFRES, LOS | México | |
| MESA EL CHIQUIHUITILLO | Dome of PRIMAVERA, SIERRA LA | México | |
| MESA EL LEON | Dome of PRIMAVERA, SIERRA LA | México | |
| MESA EL MAJAGUATE [MESA EL NAJAHUETE] | Dome of PRIMAVERA, SIERRA LA | México | |
| MESA EL NAJAHUETE | Dome of PRIMAVERA, SIERRA LA | México | |
| MESA EL ROSARIO | Dome of AZUFRES, LOS | México | |
| MESA LA LOBERA | Dome of PRIMAVERA, SIERRA LA | México | |
| MESA, CERRO DE LA | Tuff cone of SAN PABLO VOLCANIC FIELD | Luzon | |
| MESA, LA | Cone of CHICHINAUTZIN | México | |
| MESA, LA | Pleistocene caldera of VALLE, EL | Panamá | |
| MESAH | Synonym of TEON | Banda Sea | |
| MESAS, CERRO LAS | Cinder cone of CINOTEPEQUE, CERRO | El Salvador & Honduras | |
| MESAS, VOLCAN LAS | Dome of MASCOTA VOLCANIC FIELD | México | |
| MESETA | Stratovolcano of FUEGO | Guatemala | |
| MESO-SEMIACHIK | Stratovolcano of MALY SEMIACHIK | Kamchatka Peninsula | |
| MESS CREEK HOT SPRING | Thermal Feature of SPECTRUM RANGE | Canada | |
| MESS LAKE HOT SPRINGS | Thermal Feature of SPECTRUM RANGE | Canada | |
| MESS LAKE LAVA FIELD | Vent of SPECTRUM RANGE | Canada | |
| MESZAH PEAK | Cone of LEVEL MOUNTAIN | Canada | |
| METATE, CERRO EL | Shield volcano of MICHOACAN-GUANAJUATO | México | |
| METCALF DOMES | Former dome of BOGOSLOF | Aleutian Islands | |
| METEPEC | Cone of CHICHINAUTZIN | México | |
| METHANA | Lava domes | Historical | Greece |
| METIS SHOAL | Submarine volcano | Historical | Tonga Islands |
| METLALCUEYATLE | Synonym of MALINCHE, LA | México | |
| METROGOON LAKE | Synonym of FISHER | Aleutian Islands | |
| METS TSOUGLOUKH | Cone of GHEGAM RIDGE | Caucasus, Georgia & Armenia | |
| MEY, PUY DE | Cone of CHAINE DES PUYS | Western Europe | |
| MEYERS NUNATAK | Cone of HUDSON MOUNTAINS | Antarctica & South Sandwich Islands | |
| MEZARLIKTEPE | Cone of NEMRUT DAGI | Turkey | |
| MEZHDUSOPOCHNY | Shield volcano | Holocene? | Kamchatka Peninsula |
| MFOMBEN | Cone of OKU VOLCANIC FIELD | Africa (western) | |
| MGAHINGA [GAHINGA] | Cone of MUHAVURA | Africa (central) | |
| MI-IKE | Maar of KIRISHIMA | Ryukyu Islands & Kyushu | |
| MI-TAKE | Dome of AKUSEKI-JIMA | Ryukyu Islands & Kyushu | |
| MI-TAKE [KITA-DAKE] | Stratovolcano of SAKURA-JIMA | Ryukyu Islands & Kyushu | |
| MIANTIANSHAN | Stratovolcano of TATUN GROUP | Taiwan | |
| MICHAEL | Stratovolcano | Historical | Antarctica & South Sandwich Islands |
| MICHICO, CERRO | Cone of TROMEN | Central Chile & Argentina | |
| MICHINCHA, CERRO | Stratovolcano of OLCA-PARUMA | Northern Chile, Bolivia & Argentina | |
| MICHINMAHUIDA (MICHINMAVIDA) | Synonym of MINCHINMAVIDA | Southern Chile & Argentina | |
| MICHOACAN-GUANAJUATO | Cinder cones | Historical | México |
| MICOS, CERRO DE LOS | Dome of ILOPANGO | El Salvador & Honduras | |
| MICOTRIN | Dome of TROIS PITONS, MORNE | West Indies | |
| MICROS POLYBOTES [POLYVOTIS MICROS] | Vent of NISYROS | Greece | |
| MIDA, CUDDIA | Vent of PANTELLERIA | Italy | |
| MIDAGAHARA | Synonym of TATE-YAMA | Honshu | |
| MIDASHI-YAMA | Synonym of FUJI | Honshu | |
| MIDDLE GOBI | Cinder cones | Holocene? | Mongolia |
| MIDDLE HILL [MT. PATUKIO] | Cone of SIMBO | Bougainville & Solomon Islands | |
| MIDDLE RANGE | Stratovolcano of LIAMUIGA | West Indies | |
| MIDDLE SISTER | Stratovolcano of NORTH SISTER FIELD | USA (Oregon) | |
| MIDHDALSJOKULL | Synonym of KATLA | Iceland (southern) | |
| MIDKVISLARHRAUN | Fissure vent of KATLA | Iceland (southern) | |
| MIDORI | Synonym of ZAVARITZKI CALDERA | Kuril Islands | |
| MIDORIGA-IKE | Crater of HAKU-SAN | Honshu | |
| MIDORIIKO | Synonym of ZAVARITZKI CALDERA | Kuril Islands | |
| MIDSKALARHEIDARHRAUN | Fissure vent of EYJAFJOLL | Iceland (southern) | |
| MIE-YAMA | Synonym of FUJI | Honshu | |
| MIGONG SHAN | Cinder cone of KUNLUN VOLCANIC GROUP | China (western) | |
| MIGONG SHAN | Cinder cone of KUNLUN VOLCANIC GROUP | China (western) | |
| MIGULULU | Cone of CHYULU HILLS | Africa (eastern) | |
| MIHAGA | Cone of NYAMURAGIRA | Africa (central) | |
| MIHARA | Pleistocene caldera of HACHIJO-JIMA | Izu, Volcano, & Mariana Islands | |
| MIHARA-YAMA | Cone of OSHIMA | Izu, Volcano, & Mariana Islands | |
| MIHARASHI-YAMA | Dome of AKAGI | Honshu | |
| MIHONGA | Cone of NYAMURAGIRA | Africa (central) | |
| MIHUNZHENG | Cinder cone of JINGBO | China (eastern) | |
| MIIKE-DAKE | Dome of HIUCHI | Honshu | |
| MIKAGE-SAN | Synonym of FUJI | Honshu | |
| MIKAMI-YAMA | Synonym of FUJI | Honshu | |
| MIKASA-YAMA | Stratovolcano of ON-TAKE | Honshu | |
| MIKOMBE | Cone of NYAMURAGIRA | Africa (central) | |
| MIKROS POLYBOTES [POLYVOTIS MICROS] | Vent of NISYROS | Greece | |
| MIKURA-JIMA | Stratovolcano | Tephrochronology | Izu, Volcano, & Mariana Islands |
| MIKURIGAIKE | Crater of TATE-YAMA | Honshu | |
| MILBANKE SOUND GROUP | Cinder cones | Holocene | Canada |
| MILKY RIVER | Thermal Feature of ATKA | Aleutian Islands | |
| MILLER KNOLL | Cone of MARKAGUNT PLATEAU | USA (Utah) | |
| MILNE | Somma volcano | Holocene | Kuril Islands |
| MILOS | Stratovolcanoes | Radiocarbon | Greece |
| MILT'S POND HOT SPRINGS | Thermal Feature of ST. HELENS | USA (Washington) | |
| MILU TATU | Cone of NYAMBENI HILLS | Africa (eastern) | |
| MIMATA-YAMA | Dome of KUJU | Ryukyu Islands & Kyushu | |
| MINA AZUFRAL | Thermal Feature of NEGRA, SIERRA | Galápagos Islands | |
| MINA, VOLCAN LA | Cinder cone of MICHOACAN-GUANAJUATO | México | |
| MINABUL | Cone of CAMIGUIN DE BABUYANES | North of Luzon | |
| MINAMI IWO DAKE | Synonym of KUNTOMINTAR | Kuril Islands | |
| MINAMI KASUGA | Submarine volcano | Holocene | Izu, Volcano, & Mariana Islands |
| MINAMI-CHIRIPPU [BOGDAN KHMELNITSKII] | Stratovolcano of CHIRIP | Kuril Islands | |
| MINAMI-DAKE | Stratovolcano of SAKURA-JIMA | Ryukyu Islands & Kyushu | |
| MINAMI-DAKE | Stratovolcano of AKAN | Hokkaido | |
| MINAMI-DAKE | Crater of SHIRETOKO-IWO-ZAN | Hokkaido | |
| MINAMI-GASSAN | Stratovolcano of NASU | Honshu | |
| MINAMI-HIYOSHI | Submarine volcano | Historical | Izu, Volcano, & Mariana Islands |
| MINAMI-HIYOSHI KAIZAN | Synonym of MINAMI-HIYOSHI | Izu, Volcano, & Mariana Islands | |
| MINAMI-IWO-JIMA | Synonym of FUKUTOKU-OKANOBA | Izu, Volcano, & Mariana Islands | |
| MINAMI-TIRIPPU [BOGDAN KHMELNITSKII] | Stratovolcano of CHIRIP | Kuril Islands | |
| MINAMI-ZAO | Stratovolcano of ZAO | Honshu | |
| MINARDO, MONTE | Cinder cone of ETNA | Italy | |
| MINASGUILCA CHICO [NINAHUILCA] | Dome of ATACAZO | Ecuador | |
| MINCHENMADON (MINCHINMADON) | Synonym of MINCHINMAVIDA | Southern Chile & Argentina | |
| MINCHINMAVIDA | Stratovolcano | Historical | Southern Chile & Argentina |
| MINEJI | Dome of NII-JIMA | Izu, Volcano, & Mariana Islands | |
| MINEZI [MINEJI] | Dome of NII-JIMA | Izu, Volcano, & Mariana Islands | |
| MINIAYAO | Dome of PACO | Mindanao | |
| MINIQUES | Stratovolcanoes | Holocene? | Northern Chile, Bolivia & Argentina |
| MINMA | Cone of LOWER CHINDWIN | Southeast Asia | |
| MINNEI | Crater of AMBRYM | Vanuatu | |
| MINOAN CALDERA | Caldera of SANTORINI | Greece | |
| MINOKOL HILL | Dome of CAMIGUIN | Mindanao | |
| MINOPOLI | Crater of CAMPI FLEGREI | Italy | |
| MINOWA-YAMA | Stratovolcano of ADATARA | Honshu | |
| MIOGATAIRA | Crater of MIYAKE-JIMA | Izu, Volcano, & Mariana Islands | |
| MIPPANA | Crater of MIYAKE-JIMA | Izu, Volcano, & Mariana Islands | |
| MIRADOR | Crater of LLAIMA | Central Chile & Argentina | |
| MIRADOR | Cinder cone of CARRAN-LOS VENADOS | Central Chile & Argentina | |
| MIRAFLORES | Stratovolcano of TECUAMBURRO | Guatemala | |
| MIRAFLORES | Dome of APOYEQUE | Nicaragua | |
| MIRAFLORES | Cone of PALENA VOLCANIC GROUP | Southern Chile & Argentina | |
| MIRAFLORES-NEJAPA | Synonym of NEJAPA-MIRAFLORES | Nicaragua | |
| MIRAIBTA, JEBEL EL | Cone of BAYUDA VOLCANIC FIELD | Africa (northern) | |
| MIRANDA | Synonym of ILIAMNA | Alaska (southwestern) | |
| MIRANDO | Synonym of REDOUBT | Alaska (southwestern) | |
| MIRAVALLES | Stratovolcano | Historical | Costa Rica |
| MISAHUANA MAURAS, VOLCAN | Cinder cone of ANDAHUA-ORCOPAMPA | Perú | |
| MISAKI | Synonym of OKI-DOGO | Honshu | |
| MISENO, CABO | Tuff cone of CAMPI FLEGREI | Italy | |
| MISERY PEAK, MOUNT | Dome of LIAMUIGA | West Indies | |
| MISODO-ANA | Crater of MIYAKE-JIMA | Izu, Volcano, & Mariana Islands | |
| MISTERIO, DEL [LAGUNA RIO CUARTO] | Maar of POAS | Costa Rica | |
| MISTERIOS, LAGUNA DE LOS [LAGUNA RIO CUARTO] | Maar of POAS | Costa Rica | |
| MISTI, EL | Stratovolcano | Historical | Perú |
| MITAD, EL | Vent of SANTA MARIA | Guatemala | |
| MITAN, MORNE | Thermal Feature of SOUFRIERE GUADELOUPE | West Indies | |
| MITCHELL, MT. | Cone of NEWER VOLCANICS PROV | Australia | |
| MITER | Crater of BLACK ROCK DESERT | USA (Utah) | |
| MITORIBATA | Fissure vent of MIYAKE-JIMA | Izu, Volcano, & Mariana Islands | |
| MITSU-DAKE | Dome of OMANAGO GROUP | Honshu | |
| MITSUGO-JIMA (MITUGO-ZIMA) | Synonym of TORI-SHIMA | Izu, Volcano, & Mariana Islands | |
| MITSUISHI-YAMA | Stratovolcano of IWATE | Honshu | |
| MITUISI-YAMA [MITSUISHI-YAMA] | Stratovolcano of IWATE | Honshu | |
| MIYAKE-JIMA | Stratovolcano | Historical | Izu, Volcano, & Mariana Islands |
| MIYAZUKA-YAMA | Dome of NII-JIMA | Izu, Volcano, & Mariana Islands | |
| MIZU-GAMA | Crater of KUSATSU-SHIRANE | Honshu | |
| MIZUNASHI | Maar of IBUSUKI VOLCANIC FIELD | Ryukyu Islands & Kyushu | |
| MIZUTAMARI | Maar of MIYAKE-JIMA | Izu, Volcano, & Mariana Islands | |
| MOCHO, CORDILLERA EL | Stratovolcano of QUETRUPILLAN | Central Chile & Argentina | |
| MOCHO, EL | Stratovolcano of MOCHO-CHOSHUENCO | Central Chile & Argentina | |
| MOCHO-CHOSHUENCO | Stratovolcanoes | Historical | Central Chile & Argentina |
| MODENDA | Cone of KARISIMBI | Africa (central) | |
| MODOC-MEDICINE LAKE FIELD | Synonym of MEDICINE LAKE | USA (California) | |
| MOE-SHIMA | Synonym of SUWANOSE-JIMA | Ryukyu Islands & Kyushu | |
| MOEDER-EN-KIND | Cone of PRINCE EDWARD ISLAND | Indian Ocean (southern) | |
| MOENGKER, GUNUNG [GUNUNG MUNGKER] | Cone of ARJUNO-WELIRANG | Java | |
| MOETELONG, BOER | Synonym of TELONG, BUR NI | Sumatra | |
| MOFETE | Crater of CAMPI FLEGREI | Italy | |
| MOFFETT | Stratovolcano | Holocene? | Aleutian Islands |
| MOGOTE DE LAS PILAS, CERRO EL | Cone of CONCEPCION | Nicaragua | |
| MOGOTE, CERRO | Stratovolcano of MIRAVALLES | Costa Rica | |
| MOGOTE, LOMA EL | Cinder cone of CONCEPCION | Nicaragua | |
| MOIKEHA | Submarine vent of MAUNA LOA | Hawaiian Islands | |
| MOIKESHI | Synonym of LVINAYA PAST | Kuril Islands | |
| MOINA | Synonym of DABBAHU | Africa (northeastern) & Red Sea | |
| MOJANDA | Stratovolcanoes | Holocene? | Ecuador |
| MOJON, MONTANA DEL | Cone of LANZAROTE | Canary Islands | |
| MOKA, PICO DO | Synonym of SAN JOAQUIN | Africa (western) | |
| MOKA, PITON | Cinder cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| MOKAI | Dome of MAROA | New Zealand | |
| MOKHNATAYA | Cinder cone of TOLBACHIK | Kamchatka Peninsula | |
| MOKOIA | Dome of ROTORUA | New Zealand | |
| MOKST BUTTE | Cinder cone of NEWBERRY | USA (Oregon) | |
| MOKUAWEOWEO | Caldera of MAUNA LOA | Hawaiian Islands | |
| MOKUNDO | Cone of CAMEROON | Africa (western) | |
| MOKUYO SEAMOUNT | Submarine volcano | Fumarolic | Izu, Volcano, & Mariana Islands |
| MOLABUSHAN | Cone of WUDALIANCHI | China (eastern) | |
| MOLARA | Crater of ISCHIA | Italy | |
| MOLCAJETE | Cone of ZITACUARO-VALLE DE BRAVO | México | |
| MOLCAJETE GALOPE, VOLCAN | Dome of MASCOTA VOLCANIC FIELD | México | |
| MOLCAJETE GRANDE, VOLCAN | Cinder cone of CEBORUCO | México | |
| MOLCAJETE, EL | Cone of CHICHINAUTZIN | México | |
| MOLCAJETE, VOLCAN | Cinder cone of MASCOTA VOLCANIC FIELD | México | |
| MOLCAJETE, VOLCAN [CEBOROQUITO] | Cinder cone of CEBORUCO | México | |
| MOLCAJETE, VOLCAN EL | Cinder cone of MASCOTA VOLCANIC FIELD | México | |
| MOLCAJETE, VOLCAN EL | Cinder cone of MASCOTA VOLCANIC FIELD | México | |
| MOLENGRAAFF CALDERA | Synonym of BATUR | Lesser Sunda Islands | |
| MOLINA CRATER | Maar of PINACATE | México | |
| MOLINO | Cone of VULSINI | Italy | |
| MOLO | Cone of TAMBORA | Lesser Sunda Islands | |
| MOLODOI | Stratovolcano of GAMCHEN | Kamchatka Peninsula | |
| MOLODOI KIKHPINYCH | Synonym of KIKHPINYCH | Kamchatka Peninsula | |
| MOLODOY | Vent of KRASHENINNIKOV | Kamchatka Peninsula | |
| MOLODOY SHEVELUCH | Dome of SHIVELUCH | Kamchatka Peninsula | |
| MOLOKINI ISLET | Tuff cone of HALEAKALA | Hawaiian Islands | |
| MOMBACHO | Stratovolcano | Holocene | Nicaragua |
| MOMOTOMBITO, VOLCAN | Lava cone of MOMOTOMBO | Nicaragua | |
| MOMOTOMBO | Stratovolcano | Historical | Nicaragua |
| MONACO BANK | Submarine volcano | Historical | Azores |
| MONASTERO | Shield volcano of PANTELLERIA | Italy | |
| MONASTERO [CINQUE DENTI] | Pleistocene caldera of PANTELLERIA | Italy | |
| MONASTYR | Cone of AVACHINSKY | Kamchatka Peninsula | |
| MONASTYR | Cone of AVACHINSKY | Kamchatka Peninsula | |
| MONDACA [LENGUA DE VULCANO] | Dome of DESCABEZADO GRANDE | Central Chile & Argentina | |
| MONDILIBI | Vent of NEWER VOLCANICS PROV | Australia | |
| MONGIBELLO | Shield volcano of ETNA | Italy | |
| MONGIBELLO | Shield volcano of ETNA | Italy | |
| MONGO-MA-LOBA | Synonym of CAMEROON | Africa (western) | |
| MONGOGOGURA | Synonym of LENGAI, OL DOINYO | Africa (eastern) | |
| MONGOMANE | Cone of KARISIMBI | Africa (central) | |
| MONGOY, CERRO | Cinder cone of CHINGO | Guatemala | |
| MONI RIVER | Synonym of MUSA RIVER | New Guinea & D'Entrecasteaux Islands | |
| MONJE, EL | Vent of SANTA MARIA | Guatemala | |
| MONKUL | Cone of ST. ANDREW STRAIT | Admiralty Islands | |
| MONO BLANCO, CERRO | Cinder cone of SAN MARTIN | México | |
| MONO CRATERS | Lava domes | Radiocarbon | USA (California) |
| MONO LAKE ISLANDS | Synonym of MONO LAKE VOLCANIC FIELD | USA (California) | |
| MONO LAKE VOLCANIC FIELD | Cinder cones | Tephrochronology | USA (California) |
| MONOLITH VENT | Thermal Feature of CLEFT SEGMENT | Pacific Ocean (northern) | |
| MONONO ISLAND | Lava cone of UPOLU | Samoan & Wallis Islands | |
| MONOUN, LAKE | Maar of OKU VOLCANIC FIELD | Africa (western) | |
| MONOWAI SEAMOUNT | Submarine volcano | Historical | Kermadec Islands |
| MONPELOSO | Cinder cone of ETNA | Italy | |
| MONPILIERI, MONTE | Cinder cone of ETNA | Italy | |
| MONS GIBEL UTLAMAT | Synonym of ETNA | Italy | |
| MONSERRAT, CERRO | Stratovolcano of TINGUIRIRICA | Central Chile & Argentina | |
| MONT | See proper name (e.g. BRANCA, MONT) | French for MT. | |
| MONTAGNA / MONTAGNE | See proper name (e.g. SPACCATA, MONTAGNA) | Italian / French for MT. | |
| MONTAGNOLA, LA | Cinder cone of ETNA | Italy | |
| MONTAGNOLA, LA | Dome of AMIATA | Italy | |
| MONTAGNONE-MASCHIATA | Dome of ISCHIA | Italy | |
| MONTAGU ISLAND | Shield volcano | Historical | Antarctica & South Sandwich Islands |
| MONTANA | See proper name (e.g. LEJAS, MONTANA) | Spanish for MT. | |
| MONTANHA | Stratovolcano of PICO | Azores | |
| MONTANOSA, CERRO LA | Stratovolcano of MIRAVALLES | Costa Rica | |
| MONTCHAL, PUY DE | Cone of CHAINE DES PUYS | Western Europe | |
| MONTCHATRE, MAAR DE | Maar of CHAINE DES PUYS | Western Europe | |
| MONTCHIER, PUY | Cone of CHAINE DES PUYS | Western Europe | |
| MONTCINEYRE, PUY DE | Cone of CHAINE DES PUYS | Western Europe | |
| MONTE | See proper name (e.g. BURNEY, MONTE) | Italian, Portuguese, and Spanish for MT. | |
| MONTE, CERRO DE | Dome of LAJAS, LAS | Nicaragua | |
| MONTE, CUDDIA DEL | Cone of PANTELLERIA | Italy | |
| MONTEFIASCONE | Cone of VULSINI | Italy | |
| MONTENARD, PUY DE | Cone of CHAINE DES PUYS | Western Europe | |
| MONTEROSA | Submarine vent of LIPARI | Italy | |
| MONTEZUMA, CERRO | Stratovolcano of TENORIO | Costa Rica | |
| MONTGY, PUY DE | Cone of CHAINE DES PUYS | Western Europe | |
| MONTICELLI | Crater of CAMPI FLEGREI | Italy | |
| MONTICULO CINERITICO | Tuff cone of BARCENA | México | |
| MONTIONE, MT. | Cone of VULSINI | Italy | |
| MONTJUGEAT, PUY DE | Cone of CHAINE DES PUYS | Western Europe | |
| MONTOLIVET, VOLCA | Cone of OLOT VOLCANIC FIELD | Western Europe | |
| MONTON DE TRIGO | Crater of OSORNO | Southern Chile & Argentina | |
| MONTOSO, CERRO | Cone of TELICA | Nicaragua | |
| MONTOSO, CERRO | Stratovolcano of MOMOTOMBO | Nicaragua | |
| MONTOSO, CERRO | Cinder cone of MASAYA | Nicaragua | |
| MONTSACOPA, VOLCA | Cone of OLOT VOLCANIC FIELD | Western Europe | |
| MONUMENTO | Dome of TRINDADE | Atlantic Ocean (central) | |
| MOOLORT, MT. | Cone of NEWER VOLCANICS PROV | Australia | |
| MOON | Maar of PINACATE | México | |
| MOOROOKYLE, MT. | Cone of NEWER VOLCANICS PROV | Australia | |
| MORABU | Crater of BUNYARUGURU | Africa (central) | |
| MORADOS GRANDES, LOS | Cone of PAYUN MATRU | Central Chile & Argentina | |
| MORAINE | Cone of EDZIZA | Canada | |
| MORE, CRATER | Crater of GAROVE | New Britain | |
| MORERA, LOMA | Cinder cone of PLATANAR | Costa Rica | |
| MORGABIM, PITON | Cinder cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| MORGAN HOT SPRINGS | Thermal Feature of LASSEN VOLCANIC CENTER | USA (California) | |
| MORNE | See proper name (e.g. PATATE, MORNE) | French for MT. | |
| MORO | Crater of IBU | Halmahera | |
| MORO, CUDDIA DEL | Shield volcano of PANTELLERIA | Italy | |
| MORRO | Thermal Feature of PUYEHUE-CORDON CAULLE | Central Chile & Argentina | |
| MORRO DE AZUFRE | Synonym of TINGUIRIRICA | Central Chile & Argentina | |
| MORRO DE LAS ATALAYAS | Cone of LANZAROTE | Canary Islands | |
| MORRO DESCONHECIDO | Dome of TRINDADE | Atlantic Ocean (central) | |
| MORRO VERMELHO | Cone of TRINDADE | Atlantic Ocean (central) | |
| MORRO, EL | Crater of OSORNO | Southern Chile & Argentina | |
| MORTERO, EL | Maar of CALATRAVA VOLCANIC FIELD | Western Europe | |
| MORUCU | Dome of COTOPAXI | Ecuador | |
| MORZHOVOI | Stratovolcano of FROSTY | Alaska Peninsula | |
| MOS | Cone of AGUA DE PAU | Azores | |
| MOSAKIRI-YAMA | Synonym of EBEKO | Kuril Islands | |
| MOSBRUCH | Maar of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| MOSENBERG | Cone of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| MOSES | Synonym of SHISHALDIN | Aleutian Islands | |
| MOSES, MOUNT | Stratovolcano of HUDSON MOUNTAINS | Antarctica & South Sandwich Islands | |
| MOSHKOVSKAYA | Synonym of MASHKOVTSEV | Kamchatka Peninsula | |
| MOSIMUS, MT. | Twin volcano of AMBALATUNGAN GROUP | Luzon | |
| MOSQUITO MOUND | Tuya of WELLS GRAY-CLEARWATER | Canada | |
| MOSQUITO MOUNTAIN | Dome of DIABLOTINS, MORNE | West Indies | |
| MOSQUITO, CERRO EL | Cinder cone of CINOTEPEQUE, CERRO | El Salvador & Honduras | |
| MOSTAZA, MONTAÑA | Cinder cone of TENERIFE | Canary Islands | |
| MOTA LAVA | Synonym of MOTLAV | Vanuatu | |
| MOTASTEPE, CERRO | Cinder cone of NEJAPA-MIRAFLORES | Nicaragua | |
| MOTHER GOOSE | Thermal Feature of CHIGINAGAK | Alaska Peninsula | |
| MOTHER, THE [KOMBIU] | Stratovolcano of RABAUL | New Britain | |
| MOTHRA | Thermal Feature of ENDEAVOUR RIDGE | Pacific Ocean (northern) | |
| MOTI | Stratovolcano | Holocene | Halmahera |
| MOTIR | Synonym of MOTI | Halmahera | |
| MOTLAV | Stratovolcano | Holocene | Vanuatu |
| MOTMOT | Cone of LONG ISLAND | Northeast of New Guinea | |
| MOTO-SHIRANE | Cone of KUSATSU-SHIRANE | Honshu | |
| MOTO-YAMA | Stratovolcano of IOTO [IWO-JIMA] | Izu, Volcano, & Mariana Islands | |
| MOTONUPURI | Cone of GROZNY GROUP | Kuril Islands | |
| MOTU LAHI | Cone of NIUAFO'OU | Tonga Islands | |
| MOTU MOLIMOLI | Cone of NIUAFO'OU | Tonga Islands | |
| MOTUAPU | Dome of TAUPO | New Zealand | |
| MOTUHORA ISLAND | Synonym of WHALE ISLAND | New Zealand | |
| MOTUKAIKO | Dome of TAUPO | New Zealand | |
| MOTUKOREA | Cone of AUCKLAND FIELD | New Zealand | |
| MOTUMA | Dome of TAUPO | New Zealand | |
| MOUA PIHAA | Submarine volcano | Seismicity | Pacific Ocean (central) |
| MOUMOUKAI | Stratovolcano of RAOUL ISLAND | Kermadec Islands | |
| MOUNA HUARARAI | Synonym of HUALALAI | Hawaiian Islands | |
| MOUNDHILL | Lava cone of SEGUAM | Aleutian Islands | |
| MOUNT | See proper name (e.g. EMMONS, MOUNT) | From Latin for a mountain or hill | |
| MOUNTAIN TOP | Dome of PLAT PAYS, MORNE | West Indies | |
| MOUSA ALLI | Stratovolcano | Holocene | Africa (northeastern) & Red Sea |
| MOUSGOU, EHI | Stratovolcano of VOON, TARSO | Africa (northern) | |
| MOUSSA ALLI | Synonym of MOUSA ALLI | Africa (northeastern) & Red Sea | |
| MOUSTABISMEN, PITON DE | Cinder cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| MOWNA ROA | Synonym of MAUNA LOA | Hawaiian Islands | |
| MOWNA WORRARAR | Synonym of HUALALAI | Hawaiian Islands | |
| MOYE | Synonym of TULLU MOJE | Africa (northeastern) & Red Sea | |
| MOYORO-DAKE [KUDRIAVY] | Stratovolcano of MEDVEZHIA | Kuril Islands | |
| MOYOTEPE, CERRO | Stratovolcano of SAN CRISTOBAL | Nicaragua | |
| MOYUTA | Stratovolcano | Hot Springs | Guatemala |
| MPOLI | Cone of IZUMBWE-MPOLI | Africa (eastern) | |
| MT | See proper name (e.g. CAMEROON, MT.) | Abbreviation for MOUNT | |
| MUAGA MUA [MAUGA AFI] | Fissure vent of SAVAI'I | Samoan & Wallis Islands | |
| MUBONYAKYA | Cone of CHYULU HILLS | Africa (eastern) | |
| MUCU | Thermal Feature of POCO LEOK | Lesser Sunda Islands | |
| MUD BAY | Cone of GOODENOUGH | New Guinea & D'Entrecasteaux Islands | |
| MUE | Cone of KILIMANJARO | Africa (eastern) | |
| MUEGGEN, CUDDIA | Shield volcano of PANTELLERIA | Italy | |
| MUERTO, ISLA EL | Cone of ZAPATERA | Nicaragua | |
| MUERTO, VOLCAN EL | Stratovolcano of OJOS DEL SALADO, NEVADOS | Northern Chile, Bolivia & Argentina | |
| MUGARA | Cone of NYIRAGONGO | Africa (central) | |
| MUGOGO | Cone of VISOKE | Africa (central) | |
| MUHABURA | Synonym of MUHAVURA | Africa (central) | |
| MUHAVURA | Stratovolcano | Holocene | Africa (central) |
| MUHAVURU | Synonym of MUHAVURA | Africa (central) | |
| MUHLENBERG | Cone of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| MUHOTI | Tuff cone of FORT PORTAL | Africa (central) | |
| MUHUBOLI | Vent of NYAMURAGIRA | Africa (central) | |
| MUIRHEAD, MT. | Cone of NEWER VOLCANICS PROV | Australia | |
| MUJA | Cone of NYIRAGONGO | Africa (central) | |
| MUKAI-YAMA | Dome of NII-JIMA | Izu, Volcano, & Mariana Islands | |
| MUKO-YAMA [MUKAI-YAMA] | Dome of NII-JIMA | Izu, Volcano, & Mariana Islands | |
| MUKUANI HILL | Dome of NYAMBENI HILLS | Africa (eastern) | |
| MULAS, ALTO DE LAS | Fissure vent of DESCABEZADO GRANDE | Central Chile & Argentina | |
| MULATA | Cone of SETE CIDADES | Azores | |
| MULCARES SOUFRIERE | Thermal Feature of SOUFRIERE HILLS | West Indies | |
| MULDERI | Crater of KARISIMBI | Africa (central) | |
| MULE MOUNTAIN | Dome of CINNAMON BUTTE | USA (Oregon) | |
| MULE, CERRO LA | Cinder cone of NEGRO, CERRO | Nicaragua | |
| MULIMAUGA | Cone of SAVAI'I | Samoan & Wallis Islands | |
| MULINO DE VALENTANO | Cone of VULSINI | Italy | |
| MULUKROKO [ILITEBULELE] | Cone of ILILABALEKAN | Lesser Sunda Islands | |
| MUNDAFELL | Fissure vent of HEKLA | Iceland (southern) | |
| MUNDAGIGAR [MUNDAFELL] | Fissure vent of HEKLA | Iceland (southern) | |
| MUNDI | Cone of PAKA | Africa (eastern) | |
| MUNDING, KAWAH | Thermal Feature of KAMOJANG, KAWAH | Java | |
| MUNDO NUEVA | Crater of CUMBAL | Colombia | |
| MUNDO, CERRO | Cone of SAN CRISTOBAL | Galápagos Islands | |
| MUNDUA | Complex volcano | Holocene | New Britain |
| MUNDUZHYAK | Dome of UDOKAN PLATEAU | Russia (southeastern) | |
| MUNGKER, GUNUNG | Cone of ARJUNO-WELIRANG | Java | |
| MUNGO-MA-LOBA | Synonym of CAMEROON | Africa (western) | |
| MUNGOGO WA BOGWE | Synonym of LENGAI, OL DOINYO | Africa (eastern) | |
| MUNLULU | Crater of LANGILA | New Britain | |
| MUNLULU, MOUNT | Cone of LANGILA | New Britain | |
| MUNTANGO | Pit crater of KARISIMBI | Africa (central) | |
| MUNYINYA | Crater of KARISIMBI | Africa (central) | |
| MURAMBE | Crater of BUNYARUGURU | Africa (central) | |
| MURARA | Cone of NYAMURAGIRA | Africa (central) | |
| MURCONDAS, PICA DAS [MARCONDAS] | Dome of FURNAS | Azores | |
| MURDOCH | Cone of SEAL NUNATAKS GROUP | Antarctica & South Sandwich Islands | |
| MURIA | Stratovolcano | Holocene | Java |
| MURIAH | Synonym of MURIA | Java | |
| MURNIAU | Tuff cone of BARRIER, THE | Africa (eastern) | |
| MURO DE LAS LAGRIMAS | Pyroclastic Cone of NEGRA, SIERRA | Galápagos Islands | |
| MURUESE | Cone of PAKA | Africa (eastern) | |
| MUSA ALI | Synonym of MOUSA ALLI | Africa (northeastern) & Red Sea | |
| MUSA RIVER | Hydrothermal field | Hot Springs | New Guinea & D'Entrecasteaux Islands |
| MUSANULA | Cone of KARISIMBI | Africa (central) | |
| MUSEAU DE TANCHE | Cone of AMSTERDAM ISLAND | Indian Ocean (southern) | |
| MUSHKETOVA (MUSHKETOV) | Cinder cone of VITIM PLATEAU | Russia (southeastern) | |
| MUSHUSHWE | Cone of NYIRAGONGO | Africa (central) | |
| MUSIDE | Cone of VISOKE | Africa (central) | |
| MUSONGE | Cone of CAMEROON | Africa (western) | |
| MUSSA-ALI | Synonym of MOUSA ALLI | Africa (northeastern) & Red Sea | |
| MUSUAN | Lava dome | Historical | Mindanao |
| MUTA DO LEAL | Cone of PICOS VOLCANIC SYSTEM | Azores | |
| MUTELONG, BUR | Synonym of TELONG, BUR NI | Sumatra | |
| MUTI | Cone of NYIRAGONGO | Africa (central) | |
| MUTJU [MUCU] | Thermal Feature of POCO LEOK | Lesser Sunda Islands | |
| MUTNAIA, SOPKA (MUTNAJA) | Synonym of MUTNOVSKY | Kamchatka Peninsula | |
| MUTNOVSKAIA, SOPKA | Synonym of MUTNOVSKY | Kamchatka Peninsula | |
| MUTNOVSKY | Complex volcano | Historical | Kamchatka Peninsula |
| MUTNOWSKIJ | Synonym of MUTNOVSKY | Kamchatka Peninsula | |
| MUTONAJU | Cone of CHYULU HILLS | Africa (eastern) | |
| MUTSA [MUJA] | Cone of NYIRAGONGO | Africa (central) | |
| MUTSU-HIUCHI-DAKE | Stratovolcano | Pleistocene-Fumarolic | Honshu |
| MUTU | Synonym of KELIMUTU | Lesser Sunda Islands | |
| MUVO | Cone of NYAMURAGIRA | Africa (central) | |
| MUWEILIH | Crater of BAYUDA VOLCANIC FIELD | Africa (northern) | |
| MWAILO | Cone of CHYULU HILLS | Africa (eastern) | |
| MYAYEIK | Cone of LOWER CHINDWIN | Southeast Asia | |
| MYOBAN | Thermal Feature of TSURUMI | Ryukyu Islands & Kyushu | |
| MYOE [NYEY] | Submarine vent of REYKJANESHRYGGUR | Iceland (southwestern) | |
| MYOGA-TAKE | Cone of FUJI | Honshu | |
| MYOHOJI | Cone of HACHIJO-JIMA | Izu, Volcano, & Mariana Islands | |
| MYOJIN KNOLL | Submarine volcano | Holocene? | Izu, Volcano, & Mariana Islands |
| MYOJIN-SHO | Dome of BAYONNAISE ROCKS | Izu, Volcano, & Mariana Islands | |
| MYOKEN-DAKE | Stratovolcano of UNZEN | Ryukyu Islands & Kyushu | |
| MYOKEN-DAKE | Stratovolcano of UNZEN | Ryukyu Islands & Kyushu | |
| MYOKO | Stratovolcano | Radiocarbon | Honshu |
| MYOKO-DAKE | Stratovolcano of IWATE | Honshu | |
| MYOKO-SAN | Synonym of FUJI | Honshu | |
| MYOKO-SAN | Dome of MYOKO | Honshu | |
| MYORO-DAKE [KUDRIAVY] | Stratovolcano of MEDVEZHIA | Kuril Islands | |
| MYOZIN-SYO [MYOJIN-SHO] | Dome of BAYONNAISE ROCKS | Izu, Volcano, & Mariana Islands | |
| MYRDALSJOKULL | Synonym of KATLA | Iceland (southern) | |
| MYRIAM, VOLCAN | Stratovolcano of MOYUTA | Guatemala | |
| MYVATNSELDAR | Crater Row of KRAFLA | Iceland (northeastern) | |
| MYVETNINGAHRAUN | Fissure vent of ASKJA | Iceland (northeastern) | |
| NA PUU O NA ELEMAKULE | Cone of KILAUEA | Hawaiian Islands | |
| NABBEO | Synonym of NABRO | Africa (northeastern) & Red Sea | |
| NABE-YAMA | Cone of SAKURA-JIMA | Ryukyu Islands & Kyushu | |
| NABE-YAMA | Dome of ABU | Honshu | |
| NABEDAO | Stratovolcano of SUWANOSE-JIMA | Ryukyu Islands & Kyushu | |
| NABELBERG [PUSUKBUKIT] | Stratovolcano of TOBA | Sumatra | |
| NABEMORI | Dome of CHOKAI | Honshu | |
| NABESHIMA-DAKE | Dome of IBUSUKI VOLCANIC FIELD | Ryukyu Islands & Kyushu | |
| NABOIYOTON [NABUYATOM] | Tuff cone of BARRIER, THE | Africa (eastern) | |
| NABRO | Stratovolcano | Holocene? | Africa (northeastern) & Red Sea |
| NABUGANDO | Tuff cone of KATWE-KIKORONGO | Africa (central) | |
| NABUKELEVU | Lava domes | Radiocarbon | Fiji Islands |
| NABUYATOM | Tuff cone of BARRIER, THE | Africa (eastern) | |
| NACANZE, CERRO [CERRO MACANZE] | Cinder cone of GUAZAPA | El Salvador & Honduras | |
| NACOLCOL | Thermal Feature of PINATUBO | Luzon | |
| NADUG-KHOLDONGER | Synonym of WUDALIANCHI | China (eastern) | |
| NADUGDUGAN | Dome of LABO | Luzon | |
| NAFANUA | Lava cone of VAILULU'U | Samoan & Wallis Islands | |
| NAFTILOS | Dome of SANTORINI | Greece | |
| NAGA-YAMA | Cone of FUJI | Honshu | |
| NAGANE | Fissure vent of MIYAKE-JIMA | Izu, Volcano, & Mariana Islands | |
| NAGANO | Vent of IZU-TOBU | Honshu | |
| NAGANO-HIGASHI | Vent of IZU-TOBU | Honshu | |
| NAGAO-YAMA | Cone of FUJI | Honshu | |
| NAGARAMASAINA | Synonym of BARRIER, THE | Africa (eastern) | |
| NAGAT | Cone of TRAITOR'S HEAD | Vanuatu | |
| NAGAYAMA-DAKE | Stratovolcano of DAISETSU | Hokkaido | |
| NAGCARLANG, MT. | Cone of SAN PABLO VOLCANIC FIELD | Luzon | |
| NAGE | Thermal Feature of INIERIE | Lesser Sunda Islands | |
| NAGIRA MWAITEN | Cone of BARRIER, THE | Africa (eastern) | |
| NAGLAGBONG | Thermal Feature of MALINAO | Luzon | |
| NAGLEGBENG [NAGLAGBONG] | Thermal Feature of MALINAO | Luzon | |
| NAHAHA, PUU | Cone of HUALALAI | Hawaiian Islands | |
| NAHIMBI | Cone of NYAMURAGIRA | Africa (central) | |
| NAHTO | Cone of SPECTRUM RANGE | Canada | |
| NAHUISTEPEC | Dome of SAN VICENTE | El Salvador & Honduras | |
| NAIGONESOIT | Dome of MERU | Africa (eastern) | |
| NAIO, PUU | Cone of HALEAKALA | Hawaiian Islands | |
| NAJO, EL | Thermal Feature of TELICA | Nicaragua | |
| NAKA-AZUMA | Cone of AZUMA | Honshu | |
| NAKA-DAKE | Stratovolcano of AKUSEKI-JIMA | Ryukyu Islands & Kyushu | |
| NAKA-DAKE | Stratovolcano of SAKURA-JIMA | Ryukyu Islands & Kyushu | |
| NAKA-DAKE | Stratovolcano of KIRISHIMA | Ryukyu Islands & Kyushu | |
| NAKA-DAKE | Stratovolcano of ASO | Ryukyu Islands & Kyushu | |
| NAKA-DAKE | Cone of SHIRETOKO-IWO-ZAN | Hokkaido | |
| NAKA-HIYOSHI | Submarine vent of MINAMI-HIYOSHI | Izu, Volcano, & Mariana Islands | |
| NAKA-IWO-ZIMA | Synonym of IOTO [IWO-JIMA] | Izu, Volcano, & Mariana Islands | |
| NAKA-JIMA | Dome of USU | Hokkaido | |
| NAKA-JIMA | Dome of KUTCHARO | Hokkaido | |
| NAKAMACHINESHIRI | Crater of AKAN | Hokkaido | |
| NAKAMARU-YAMA | Stratovolcano of ZAO | Honshu | |
| NAKAMATINESHIRI [NAKAMACHINESHIRI] | Crater of AKAN | Hokkaido | |
| NAKANO-SHIMA | Stratovolcanoes | Historical | Ryukyu Islands & Kyushu |
| NAKANO-SIMA | Synonym of NAKANO-SHIMA | Ryukyu Islands & Kyushu | |
| NAKANOGO | Cone of HACHIJO-JIMA | Izu, Volcano, & Mariana Islands | |
| NAKANOUMI | Caldera of TOWADA | Honshu | |
| NAKAO-TOGE | Crater of YAKE-DAKE | Honshu | |
| NAKOT | Cone of EMURUANGOGOLAK | Africa (eastern) | |
| NAKWA, MOUNT | Cone of KORATH RANGE | Africa (northeastern) & Red Sea | |
| NAMAFJALL | Thermal Feature of KRAFLA | Iceland (northeastern) | |
| NAMAFJALL-KROFLUHALS | Crater Row of KRAFLA | Iceland (northeastern) | |
| NAMAGURA | Thermal Feature of PAGO | New Britain | |
| NAMAKO-YAMA | Dome of SHIRETOKO-IWO-ZAN | Hokkaido | |
| NAMANA O KE AKUA | Cone of HALEAKALA | Hawaiian Islands | |
| NAMANG | Synonym of EGON | Lesser Sunda Islands | |
| NAMARUNU | Shield volcano | Tephrochronology | Africa (eastern) |
| NAMBROQUE [SAN JUAN] | Fissure vent of LA PALMA | Canary Islands | |
| NAMBROQUE, PICO DEL | Synonym of LA PALMA | Canary Islands | |
| NAMBU | Caldera of AKITA-KOMAGA-TAKE | Honshu | |
| NAMBU-FUJI (NAMBU-HUZI) | Synonym of IWATE | Honshu | |
| NAMLAGIRA | Synonym of NYAMURAGIRA | Africa (central) | |
| NAMSHRAUN | Crater Row of TORFAJOKULL | Iceland (southern) | |
| NAMU'A | Tuff ring of UPOLU | Samoan & Wallis Islands | |
| NAMUI, VUSI | Cone of AOBA | Vanuatu | |
| NAMURINYANG | Tuff cone of BARRIER, THE | Africa (eastern) | |
| NAN-KO-LA-SHAN [NANGELAQIUSHAN] | Cone of WUDALIANCHI | China (eastern) | |
| NANAWAREZ | Stratovolcano of ANEITYUM | Vanuatu | |
| NANDATUNSHAN | Stratovolcano of TATUN GROUP | Taiwan | |
| NANGARABAT SPRINGS | Thermal Feature of EMURUANGOGOLAK | Africa (eastern) | |
| NANGELAQIUSHAN | Cone of WUDALIANCHI | China (eastern) | |
| NANGETSU-YAMA | Stratovolcano of NASU | Honshu | |
| NANGILA | Synonym of LANGILA | New Britain | |
| NANGKLAK, KAWAH | Crater of PAPANDAYAN | Java | |
| NANGOENA | Synonym of COLO [UNA UNA] | Sulawesi | |
| NANI [MOTMOT] | Cone of LONG ISLAND | Northeast of New Guinea | |
| NANLA | Synonym of LANGILA | New Britain | |
| NANLONGWAN | Maar of LONGGANG GROUP | China (eastern) | |
| NANOOK | Dome of EDZIZA | Canada | |
| NANSHAN | Cinder cone of KELUO GROUP | China (eastern) | |
| NANTAI | Stratovolcano | Holocene? | Honshu |
| NANUM RIVER | Thermal Feature of AMBITLE | New Ireland | |
| NANWAKSJIAK | Maar of NUNIVAK ISLAND | Alaska (western) | |
| NANXING | Cone of LEIZHOU BANDAO | Southeast Asia | |
| NANZAL, CERRO | Cinder cone of USULUTAN | El Salvador & Honduras | |
| NAOLINCA DE VICTORIA VOLC FIELD | Synonym of NAOLINCO VOLCANIC FIELD | México | |
| NAOLINCO VOLCANIC FIELD | Pyroclastic cones | Radiocarbon | México |
| NAPAU | Pit crater of KILAUEA | Hawaiian Islands | |
| NAPERITO | Tuff cone of BARRIER, THE | Africa (eastern) | |
| NAPIER, MT. | Cone of NEWER VOLCANICS PROV | Australia | |
| NAPOLEON, CRATERE | Crater of SOUFRIERE GUADELOUPE | West Indies | |
| NAPPATECUHTLAN | Synonym of COFRE DE PEROTE | México | |
| NAPPE DE LAVE DE DAMAR | Synonym of DHAMAR, HARRAS OF | Arabia | |
| NAR, HARRAT EN- | Synonym of 'UWAYRID, HARRAT | Arabia | |
| NARAGE | Stratovolcano | Pleistocene-Geysers | New Britain |
| NARANJO, EL | Cone of ZITACUARO-VALLE DE BRAVO | México | |
| NARANJOS, CERRO LOS | Stratovolcano of APANECA RANGE | El Salvador & Honduras | |
| NARAO-DAKE | Stratovolcano of ASO | Ryukyu Islands & Kyushu | |
| NARATA | Cone of TAVEUNI | Fiji Islands | |
| NARBOROUGH | Synonym of FERNANDINA | Galápagos Islands | |
| NARCONDAM | Synonym of NARCONDUM | Andaman Islands | |
| NARCONDUM | Stratovolcano | Holocene | Andaman Islands |
| NAREGA | Synonym of NARAGE | New Britain | |
| NARI COL | Caldera of ULREUNG | Korea | |
| NARIKAWA | Maar of IBUSUKI VOLCANIC FIELD | Ryukyu Islands & Kyushu | |
| NARIZ, LA | Cone of PAYUN MATRU | Central Chile & Argentina | |
| NAROVE ISLAND | Synonym of SIMBO | Bougainville & Solomon Islands | |
| NARRAGA (NARRAGE) | Synonym of NARAGE | New Britain | |
| NARSE D'AMPOIX | Maar of CHAINE DES PUYS | Western Europe | |
| NARSE D'ESPINSASSE | Maar of CHAINE DES PUYS | Western Europe | |
| NARUGO | Caldera | Historical | Honshu |
| NARUKO | Synonym of NARUGO | Honshu | |
| NARUSAWATAKANE | Synonym of FUJI | Honshu | |
| NASH CRATER | Cinder cone of SAND MOUNTAIN FIELD | USA (Oregon) | |
| NASO | Synonym of NASU | Honshu | |
| NASU | Stratovolcanoes | Historical | Honshu |
| NASU-YAMA | Synonym of NASU | Honshu | |
| NASU-YUMOTO SPA | Thermal Feature of NASU | Honshu | |
| NATALIA | Stratovolcano of TINGUIRIRICA | Central Chile & Argentina | |
| NATIB | Stratovolcano | Holocene? | Luzon |
| NATOROTORO | Thermal Feature of KUWAE | Vanuatu | |
| NATUGNOS | Thermal Feature of SAN PABLO VOLCANIC FIELD | Luzon | |
| NATYIN TAUNG | Cone of LOWER CHINDWIN | Southeast Asia | |
| NAUCAMPATEPETL | Synonym of COFRE DE PEROTE | México | |
| NAUE, PUU | Cone of HALEAKALA | Hawaiian Islands | |
| NAUGA | Synonym of CALBUCO | Southern Chile & Argentina | |
| NAUHCAMPTA-TEPETL | Synonym of COFRE DE PEROTE | México | |
| NAUTHUNILAWE | Cone of TAVEUNI | Fiji Islands | |
| NAVIDAD | Cinder cone of LONQUIMAY | Central Chile & Argentina | |
| NAVOLIVOLI | Cone of TAVEUNI | Fiji Islands | |
| NAYAVULOA | Cone of TAVEUNI | Fiji Islands | |
| NAYDI | Stratovolcano of BABUYAN CLARO | North of Luzon | |
| NAZKO | Cinder cones | Radiocarbon | Canada |
| NDAKAZA | Crater of NYAMURAGIRA | Africa (central) | |
| NDALE | Synonym of KYATWA | Africa (central) | |
| NDAMUKORO | Cone of NYIRAGONGO | Africa (central) | |
| NDANA | Cone of TAVEUNI | Fiji Islands | |
| NDEKE | Tuff cone of FORT PORTAL | Africa (central) | |
| NDETE NAPU | Fumarole field | Fumarolic | Lesser Sunda Islands |
| NDETU NAPU (NDETOE NAPOE) | Synonym of NDETE NAPU | Lesser Sunda Islands | |
| NDIRU | Cone of HOMA MOUNTAIN | Africa (eastern) | |
| NDOBWA | Dome of NYAMBENI HILLS | Africa (eastern) | |
| NDONYU YUKI HILL | Pyroclastic Cone of NYAMBENI HILLS | Africa (eastern) | |
| NDWATI | Crater of RUNGWE | Africa (eastern) | |
| NE ANATAHAN | Submarine vent of ANATAHAN | Izu, Volcano, & Mariana Islands | |
| NE CH'E DDHAWA | Cone of FORT SELKIRK | Canada | |
| NEAPOLITAN YELLOW TUFF | Pleistocene caldera of CAMPI FLEGREI | Italy | |
| NEAR ISLAND | Cone of ZUKUR | Africa (northeastern) & Red Sea | |
| NECK, THE | Cone of EDZIZA | Canada | |
| NEDOSTUPNY | Cinder cone of TOLBACHIK | Kamchatka Peninsula | |
| NEGAMI-DAKE [NABEDAO] | Stratovolcano of SUWANOSE-JIMA | Ryukyu Islands & Kyushu | |
| NEGIT ISLAND | Cone of MONO LAKE VOLCANIC FIELD | USA (California) | |
| NEGOP-GHANG | Maar of OKU VOLCANIC FIELD | Africa (western) | |
| NEGRA, MONTANA [SIETE FUENTES] | Cinder cone of TENERIFE | Canary Islands | |
| NEGRA, MONTANA [VOLCAN DE GARACHICO] | Cinder cone of TENERIFE | Canary Islands | |
| NEGRA, MONTANA [VOLCAN NUEVO DEL FUEGO] | Cinder cone of LANZAROTE | Canary Islands | |
| NEGRA, SIERRA | Stratovolcano of ORIZABA, PICO DE | México | |
| NEGRA, SIERRA | Shield volcano | Historical | Galápagos Islands |
| NEGRA, SIERRA | Synonym of BLANCAS, LOMAS | Central Chile & Argentina | |
| NEGRAS, MONTANAS DE | Fissure vent of TENERIFE | Canary Islands | |
| NEGRAS, MONTANETAS LAS | Fissure vent of TENERIFE | Canary Islands | |
| NEGRILLAR DE ENSENADA, VOLCANES EL | Fissure vent of OSORNO | Southern Chile & Argentina | |
| NEGRILLAR, EL | Pyroclastic cones | Holocene | Northern Chile, Bolivia & Argentina |
| NEGRILLAR, LA | Pyroclastic cones | Holocene? | Northern Chile, Bolivia & Argentina |
| NEGRITAS, LAS | Thermal Feature of MICHOACAN-GUANAJUATO | México | |
| NEGRO | Cinder cone of PALEI-AIKE VOLCANIC FIELD | Southern Chile & Argentina | |
| NEGRO DE MAYASQUER, CERRO | Stratovolcano | Holocene? | Colombia |
| NEGRO DEL TROMEN | Stratovolcano of TROMEN | Central Chile & Argentina | |
| NEGRO, CERRO | Cinder cones | Historical | Nicaragua |
| NEGRO, CERRO | Maar of PAMPA LUXSAR | Northern Chile, Bolivia & Argentina | |
| NEGRO, CERRO | Dome of PURICO COMPLEX | Northern Chile, Bolivia & Argentina | |
| NEGRO, CERRO | Pleistocene caldera of CHILLAN, NEVADOS DE | Central Chile & Argentina | |
| NEGRO, CERRO | Cinder cone of CARRAN-LOS VENADOS | Central Chile & Argentina | |
| NEGRO, CERRO | Cinder cone of CRATER BASALT VOLCANIC FIELD | Southern Chile & Argentina | |
| NEGRO, CRATER | Crater of MAULE, LAGUNA DEL | Central Chile & Argentina | |
| NEGRO, EL | Cinder cone of CHICHINAUTZIN | México | |
| NEGRO, LAGUNA | Maar of CARRAN-LOS VENADOS | Central Chile & Argentina | |
| NEGRO, MONTAGNON | Cone of GRAN CANARIA | Canary Islands | |
| NEGRON, MOUNT | Dome of PINATUBO | Luzon | |
| NEGROS DE ARAS | Synonym of NEGRILLAR, EL | Northern Chile, Bolivia & Argentina | |
| NEJAPA PIT | Crater of NEJAPA-MIRAFLORES | Nicaragua | |
| NEJAPA-MIRAFLORES | Fissure vents | Tephrochronology | Nicaragua |
| NEJAPA-TICOMA | Synonym of NEJAPA-MIRAFLORES | Nicaragua | |
| NEKHE KHOTA | Maar of JAYU KHOTA, LAGUNA | Northern Chile, Bolivia & Argentina | |
| NEKHE KKOTA [NEKHE KHOTA] | Maar of JAYU KHOTA, LAGUNA | Northern Chile, Bolivia & Argentina | |
| NEKO-DAKE | Stratovolcano of ASO | Ryukyu Islands & Kyushu | |
| NEL CANNESTRA | Fissure vent of STROMBOLI | Italy | |
| NELLIE'S HUMP | Cinder cone of TRISTAN DA CUNHA | Atlantic Ocean (southern) | |
| NELMA PLATEAU VOLC FIELD | Fissure vent of SIKHOTE-ALIN | Russia (southeastern) | |
| NELRUNA [VOLCANO MOUNTAIN] | Cone of FORT SELKIRK | Canada | |
| NELSON, PITON | Cinder cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| NEMASHI | Cone of CHYULU HILLS | Africa (eastern) | |
| NEMI | Maar of ALBAN HILLS | Italy | |
| NEMO PEAK | Caldera | Historical | Kuril Islands |
| NEMO-SAN | Synonym of NEMO PEAK | Kuril Islands | |
| NEMRUT BOYNU | Fissure vent of NEMRUT DAGI | Turkey | |
| NEMRUT DAGI | Stratovolcano | Historical | Turkey |
| NEMRUT KALE [NEMRUTBASI] | Cone of NEMRUT DAGI | Turkey | |
| NEMRUTBASI | Cone of NEMRUT DAGI | Turkey | |
| NEOSTROMBOLI | Stratovolcano of STROMBOLI | Italy | |
| NEOZHIDANNYI | Cone of EBEKO | Kuril Islands | |
| NEOZHIDANNYI | Cinder cone of UDOKAN PLATEAU | Russia (southeastern) | |
| NEPRIYATNAYA | Dome of DIKY GREBEN | Kamchatka Peninsula | |
| NEPTUNE CONE | Stratovolcano of FISHER | Aleutian Islands | |
| NEREUANTOP | Thermal Feature of SURETAMATAI | Vanuatu | |
| NERITA [GIULIA-FERDINANDEO] | Submarine vent of CAMPI FLEGREI MAR SICILIA | Italy | |
| NERITA BANK | Submarine vent of CAMPI FLEGREI MAR SICILIA | Italy | |
| NERO DELLE CONCASSE, MONTE | Cinder cone of ETNA | Italy | |
| NERO, MONTE | Cinder cone of ETNA | Italy | |
| NESIGE | Synonym of NEMO PEAK | Kuril Islands | |
| NESJAHRAUN | Fissure vent of HENGILL | Iceland (southwestern) | |
| NEVADA DE LAGUNAS BRAVAS, SIERRA | Synonym of NEVADA, SIERRA | Northern Chile, Bolivia & Argentina | |
| NEVADA, SIERRA | Complex volcano | Holocene | Northern Chile, Bolivia & Argentina |
| NEVADO | See proper name (e.g. CUMBAL, NEVADO DE) | Spanish for MT. | |
| NEVADO [CERRO BLANCO] | Stratovolcano of CHILLAN, NEVADOS DE | Central Chile & Argentina | |
| NEVIDIMKA | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| NEVIS PEAK | Stratovolcano | Holocene? | West Indies |
| NEW AMSTERDAM | Synonym of ST. PAUL | Indian Ocean (southern) | |
| NEW BOGOSLOF [FIRE ISLAND] | Former dome of BOGOSLOF | Aleutian Islands | |
| NEW CONE | Cone of ANIAKCHAK | Alaska Peninsula | |
| NEW CRATER, THE | Crater of SOUFRIERE ST. VINCENT | West Indies | |
| NEWBERRY | Dome of SOUTH SISTER | USA (Oregon) | |
| NEWBERRY | Shield volcano | Radiocarbon | USA (Oregon) |
| NEWER VOLCANICS PROV | Shield volcanoes | Radiocarbon | Australia |
| NEXPAYANTLA | Stratovolcano of POPOCATEPETL | México | |
| NEZAMETNAYA | Dome of KSUDACH | Kamchatka Peninsula | |
| NEZAMETNYI | Cone of EBEKO | Kuril Islands | |
| NEZAMETNYI | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| NFOU, LAKE | Maar of OKU VOLCANIC FIELD | Africa (western) | |
| NFOUET, LAKE | Maar of OKU VOLCANIC FIELD | Africa (western) | |
| NGADISARI | Pleistocene caldera of TENGGER CALDERA | Java | |
| NGAHEWA, LAKE | Crater of REPOROA | New Zealand | |
| NGAHUHA | Cone of KAIKOHE-BAY OF ISLANDS | New Zealand | |
| NGAI, DONYO | Synonym of LENGAI, OL DOINYO | Africa (eastern) | |
| NGAI, DUENJO | Synonym of LENGAI, OL DOINYO | Africa (eastern) | |
| NGALATA | Cone of CHYULU HILLS | Africa (eastern) | |
| NGALUPALA | Dome of SW USANGU BASIN | Africa (eastern) | |
| NGANGIHO | Dome of MAROA | New Zealand | |
| NGANHA | Stratovolcano of NGAOUNDERE PLATEAU | Africa (western) | |
| NGAOUNDERE PLATEAU | Volcanic field | Holocene? | Africa (western) |
| NGAPI | Synonym of LEWOTOLO | Lesser Sunda Islands | |
| NGAPOURI, LAKE | Crater of REPOROA | New Zealand | |
| NGAPUNA | Thermal Feature of ROTORUA | New Zealand | |
| NGARAMO | Crater of KIEYO | Africa (eastern) | |
| NGATAMARIKI | Thermal Feature of MAROA | New Zealand | |
| NGATORO CONE | Stratovolcano of WHITE ISLAND | New Zealand | |
| NGAURUHOE | Stratovolcano of TONGARIRO | New Zealand | |
| NGAUTUKU | Dome of MAROA | New Zealand | |
| NGAWHA HOT SPRINGS | Thermal Feature of KAIKOHE-BAY OF ISLANDS | New Zealand | |
| NGAWKASOLI [PARASO] | Thermal Feature of NONDA | Bougainville & Solomon Islands | |
| NGAZANI | Cone of CHYULU HILLS | Africa (eastern) | |
| NGEBEL, LAKE | Crater of WILIS | Java | |
| NGERE KWON | Stratovolcano of SURETAMATAI | Vanuatu | |
| NGESONG | Stratovolcano of DIENG VOLCANIC COMPLEX | Java | |
| NGEZI | Cone of VISOKE | Africa (central) | |
| NGONGOTAHA | Dome of ROTORUA | New Zealand | |
| NGOZI | Caldera | Holocene | Africa (eastern) |
| NGULIA HILLS [CHAIMU] | Cone of CHYULU HILLS | Africa (eastern) | |
| NGUNA [TABUTERA] | Stratovolcano of NORTH VATE | Vanuatu | |
| NGURDOTO CRATER | Cone of MERU | Africa (eastern) | |
| NGUSUNA | Crater of SIMBO | Bougainville & Solomon Islands | |
| NGWALA ROCK | Tuff cone of AOBA | Vanuatu | |
| NGWANGU | Cone of NGOZI | Africa (eastern) | |
| NIAFU | Synonym of NIUAFO'OU | Tonga Islands | |
| NIANIAU, PUU | Cone of HALEAKALA | Hawaiian Islands | |
| NIAWUAN | Crater of MAHAWU | Sulawesi | |
| NIBLINTO, VOLCAN | Cinder cone of CHILLAN, NEVADOS DE | Central Chile & Argentina | |
| NIBUSHI-OYAKOTSU | Dome of KUTCHARO | Hokkaido | |
| NIBUSI-OYAKOTU [NIBUSHI-OYAKOTSU] | Dome of KUTCHARO | Hokkaido | |
| NICHOLSON, CERRO | Cinder cone | Holocene | Perú |
| NICKENS, MOUNT | Cone of HUDSON MOUNTAINS | Antarctica & South Sandwich Islands | |
| NICK'S CONE | Cone of FISHER | Aleutian Islands | |
| NICOLSON ROCK | Cone of TONEY MOUNTAIN | Antarctica & South Sandwich Islands | |
| NIEUWERKERK | Submarine volcano ? | Uncertain | Banda Sea |
| NIGORIGAWA | Hydrothermal field | Pleistocene-Fumarolic | Hokkaido |
| NIGORIKAWA | Synonym of NIGORIGAWA | Hokkaido | |
| NIHONMATSUREI | Synonym of ADATARA | Honshu | |
| NII-JIMA | Lava domes | Historical | Izu, Volcano, & Mariana Islands |
| NII-YAMA | Synonym of FUJI | Honshu | |
| NIIGATA-YAKE-YAMA | Lava dome | Historical | Honshu |
| NIIJIMA-YAMA | Dome of NII-JIMA | Izu, Volcano, & Mariana Islands | |
| NIIYAMA-ZAWA | Thermal Feature of HACHIMANTAI | Honshu | |
| NIIZIMA-YAMA [NIIJIMA-YAMA] | Dome of NII-JIMA | Izu, Volcano, & Mariana Islands | |
| NIKA | Synonym of NILA | Banda Sea | |
| NIKI | Dome of SANTORINI | Greece | |
| NIKIA | Thermal Feature of NISYROS | Greece | |
| NIKKO | Submarine volcano | Fumarolic | Izu, Volcano, & Mariana Islands |
| NIKKO-BA (NIKKO-KAIZAN) | Synonym of NIKKO | Izu, Volcano, & Mariana Islands | |
| NIKKO-SHIRANE | Shield volcano | Historical | Honshu |
| NIKKO-SIRANE | Synonym of NIKKO-SHIRANE | Honshu | |
| NILA | Stratovolcano | Historical | Banda Sea |
| NILAHUE | Synonym of CARRAN-LOS VENADOS | Central Chile & Argentina | |
| NILAM, MT. | Cone of TALAKMAU | Sumatra | |
| NIMRUD DAGH | Synonym of NEMRUT DAGI | Turkey | |
| NINAGONGO | Synonym of NYIRAGONGO | Africa (central) | |
| NINAHUILCA | Dome of ATACAZO | Ecuador | |
| NINAHUILCA CHICO I | Dome of ATACAZO | Ecuador | |
| NINAHUILCA CHICO II | Dome of ATACAZO | Ecuador | |
| NINDIRI | Crater of MASAYA | Nicaragua | |
| NINEPIN ROCK | Synonym of ST. PAUL | Indian Ocean (southern) | |
| NINFAS, CERRO DE LAS | Stratovolcano of APANECA RANGE | El Salvador & Honduras | |
| NINFAS, LAGUNA LAS | Crater of APANECA RANGE | El Salvador & Honduras | |
| NINO DE JESUS [SANTIAGUITO] | Dome of SANTA MARIA | Guatemala | |
| NINO-IKE | Crater of ON-TAKE | Honshu | |
| NINOKURA | Stratovolcano of TOWADA | Honshu | |
| NINOMEGATA | Maar of MEGATA | Honshu | |
| NIPESOTSU-DAKE | Stratovolcano of NIPESOTSU-MARUYAMA | Hokkaido | |
| NIPESOTSU-MARUYAMA | Stratovolcanoes | Historical | Hokkaido |
| NIRAGONGO (NIRAGONWE) | Synonym of NYIRAGONGO | Africa (central) | |
| NIRECO | Crater of CALLAQUI | Central Chile & Argentina | |
| NIRI MBWELESU | Crater of AMBRYM | Vanuatu | |
| NIRI MBWELESU TATEN | Crater of AMBRYM | Vanuatu | |
| NIRI TATEN | Crater of AMBRYM | Vanuatu | |
| NIRRES, VOLCAN LOS | Maar of PUYEHUE-CORDON CAULLE | Central Chile & Argentina | |
| NISEKO | Stratovolcanoes | Tephrochronology | Hokkaido |
| NISEKO-ANNUPURI | Dome of NISEKO | Hokkaido | |
| NISHI KOFUJI | Fissure vent of FUJI | Honshu | |
| NISHI-ASAKIZUKA | Cone of FUJI | Honshu | |
| NISHI-AZUMA | Cone of AZUMA | Honshu | |
| NISHI-CHIGASAKI-KAIKYU | Submarine vent of IZU-TOBU | Honshu | |
| NISHI-CHOKAI | Stratovolcano of CHOKAI | Honshu | |
| NISHI-DAITEN | Cone of AZUMA | Honshu | |
| NISHI-DAKE | Synonym of ADATARA | Honshu | |
| NISHI-FUTATSUSUKA | Cone of FUJI | Honshu | |
| NISHI-HAKUUNZAN | Pleistocene caldera of HACHIJO-JIMA | Izu, Volcano, & Mariana Islands | |
| NISHI-HITOKAPPU [STOKAP] | Stratovolcano of BOGATYR RIDGE | Kuril Islands | |
| NISHI-IWATE | Stratovolcano of IWATE | Honshu | |
| NISHI-KAITOKUBA | Cone of KAITOKU SEAMOUNT | Izu, Volcano, & Mariana Islands | |
| NISHI-KOSEKUMARU | Cone of FUJI | Honshu | |
| NISHI-KUROTSUKA | Cone of FUJI | Honshu | |
| NISHI-MARUYAMA | Dome of USU | Hokkaido | |
| NISHI-NUPUKAUSHINUPURI | Dome of SHIKARIBETSU GROUP | Hokkaido | |
| NISHI-OKUNIWA | Cone of FUJI | Honshu | |
| NISHI-TSURUGI | Cone of FUJI | Honshu | |
| NISHI-USUZUKA | Cone of FUJI | Honshu | |
| NISHI-YAMA | Stratovolcano of HACHIJO-JIMA | Izu, Volcano, & Mariana Islands | |
| NISHI-YAMA | Stratovolcano of OSHIMA-OSHIMA | Hokkaido | |
| NISHI-YAMA | Dome of USU | Hokkaido | |
| NISHI-YAMA | Cone of AKAN | Hokkaido | |
| NISHI-ZAO | Stratovolcano of ZAO | Honshu | |
| NISHIBETSU | Stratovolcano of MASHU | Hokkaido | |
| NISHIMINE | Cone of YOKOATE-JIMA | Ryukyu Islands & Kyushu | |
| NISHINO-SHIMA | Caldera | Historical | Izu, Volcano, & Mariana Islands |
| NISI-YAMA [NISHI-YAMA] | Stratovolcano of HACHIJO-JIMA | Izu, Volcano, & Mariana Islands | |
| NISI-YAMA [NISHI-YAMA] | Cone of AKAN | Hokkaido | |
| NISIBETU [NISHIBETSU] | Stratovolcano of MASHU | Hokkaido | |
| NISIDA | Tuff cone of CAMPI FLEGREI | Italy | |
| NISINO-SIMA | Synonym of NISHINO-SHIMA | Izu, Volcano, & Mariana Islands | |
| NISYROS | Stratovolcano | Historical | Greece |
| NITONUPURI | Dome of NISEKO | Hokkaido | |
| NITUNG | Thermal Feature of PALUWEH | Lesser Sunda Islands | |
| NIU-AFU (NIUA FO'OU, NIAU'FOU) | Synonym of NIUAFO'OU | Tonga Islands | |
| NIUAFO'OU | Shield volcano | Historical | Tonga Islands |
| NIULLIHUELCO | Synonym of CALLAQUI | Central Chile & Argentina | |
| NIXTAMALAPAN, CERRO | Cinder cone of SAN MARTIN | México | |
| NIXTAMALAPAN, LAGUNA | Maar of SAN MARTIN | México | |
| NIZHNE-KOSHELEVSKIE | Thermal Feature of KOSHELEV | Kamchatka Peninsula | |
| NIZHNII LURBAN | Dome of UDOKAN PLATEAU | Russia (southeastern) | |
| NJALE, GOF | Maar of MARSABIT | Africa (eastern) | |
| NJOGOINE | Dome of NYAMBENI HILLS | Africa (eastern) | |
| NJOLIMWANYA | Cone of NGOZI | Africa (eastern) | |
| NKUGUTI | Crater of BUNYARUGURU | Africa (central) | |
| NKUNGA, LAKE | Crater of NYAMBENI HILLS | Africa (eastern) | |
| NO-DAKE | Dome of UNZEN | Ryukyu Islands & Kyushu | |
| NOBO, MT. | Synonym of LEWOTOBI | Lesser Sunda Islands | |
| NOBO, MT. [LEWOTOBI LAKILAKI] | Stratovolcano of LEWOTOBI | Lesser Sunda Islands | |
| NOBORIBETSU | Thermal Feature of KUTTARA | Hokkaido | |
| NOBORIBETU [NOBORIBETSU] | Thermal Feature of KUTTARA | Hokkaido | |
| NOBORIO-MINAMI | Vent of IZU-TOBU | Honshu | |
| NOCARANE, CERRO | Dome of CHACHANI, NEVADO | Perú | |
| NOCHE BUENO, CERRO | Cinder cone of IRAZU | Costa Rica | |
| NOCILLA, MONTE | Cinder cone of ETNA | Italy | |
| NOIKE | Stratovolcano of KUCHINOERABU-JIMA | Ryukyu Islands & Kyushu | |
| NOISY NELLIE | Crater of WHITE ISLAND | New Zealand | |
| NOKOGIRI-DAKE | Stratovolcano of TOKACHI | Hokkaido | |
| NOLE, PUU | Cone of HALEAKALA | Hawaiian Islands | |
| NOLF CRATER | Maar of DIAMOND CRATERS | USA (Oregon) | |
| NOME LAKE SOUTH | Tuya of TUYA VOLCANIC FIELD | Canada | |
| NOMOER | Cone of WUDALIANCHI | China (eastern) | |
| NONDA | Stratovolcano | Pleistocene-Fumarolic | Bougainville & Solomon Islands |
| NONGKOJAJAR | Pleistocene caldera of TENGGER CALDERA | Java | |
| NONOMORI-YAMA | Stratovolcano of ZAO | Honshu | |
| NOORAT, MT. | Tuff ring of NEWER VOLCANICS PROV | Australia | |
| NORD ISLAND | Synonym of NARAGE | New Britain | |
| NORD-JAN [BEERENBERG] | Stratovolcano of JAN MAYEN | Atlantic Ocean (Jan Mayen) | |
| NORDESTE | Shield volcano of FURNAS | Azores | |
| NORDURKLETTAR | Fissure vent of VESTMANNAEYJAR | Iceland (southern) | |
| NORIKURA | Stratovolcanoes | Radiocarbon | Honshu |
| NORIKURA KOGEN HOT SPRINGS | Thermal Feature of NORIKURA | Honshu | |
| NORRIS GEYSER BASIN | Thermal Feature of YELLOWSTONE | USA (Wyoming) | |
| NORTH BROTHER [CHERNY] | Stratovolcano of CHIRPOI | Kuril Islands | |
| NORTH COULEE | Dome of MONO CRATERS | USA (California) | |
| NORTH CRATER | Crater of TONGARIRO | New Zealand | |
| NORTH CRATER | Crater of RUAPEHU | New Zealand | |
| NORTH CRATER | Crater of WRANGELL | Alaska (eastern) | |
| NORTH CRATER | Crater of CRATERS OF THE MOON | USA (Idaho) | |
| NORTH DAUGHTER [TOVANUMBATIR] | Stratovolcano of RABAUL | New Britain | |
| NORTH DAVAO | Synonym of LEONARD RANGE | Mindanao | |
| NORTH DEADMAN CREEK | Dome of INYO CRATERS | USA (California) | |
| NORTH EFATE | Synonym of NORTH VATE | Vanuatu | |
| NORTH GORDA RIDGE | Submarine volcano | Historical | Pacific Ocean (northern) |
| NORTH HEAD | Cone of AUCKLAND FIELD | New Zealand | |
| NORTH HILL | Cinder cone of ST. PAUL ISLAND | Alaska (western) | |
| NORTH ISLAND | Tuff cones | Holocene | Africa (eastern) |
| NORTH ISLAND | Synonym of NARAGE | New Britain | |
| NORTH MAKEON | Cone of GAUA | Vanuatu | |
| NORTH PAGAN | Stratovolcano of PAGAN | Izu, Volcano, & Mariana Islands | |
| NORTH PAULINA PEAK | Cone of NEWBERRY | USA (Oregon) | |
| NORTH RIFT ZONE | Fissure vent of AXIAL SEAMOUNT | Pacific Ocean (northern) | |
| NORTH ROUND ISLAND | Cone of HANISH | Africa (northeastern) & Red Sea | |
| NORTH SISTER FIELD | Complex volcano | Radiocarbon | USA (Oregon) |
| NORTH VATE | Stratovolcanoes | Holocene | Vanuatu |
| NORTHEAST CRATER | Crater of ETNA | Italy | |
| NORTHEAST RIFT ZONE | Fissure vent of MAUNA LOA | Hawaiian Islands | |
| NORTHEAST TUVA PLATEAU | Synonym of AZAS PLATEAU | Russia (southeastern) | |
| NORTHERN ATITLAN | Synonym of TOLIMAN | Guatemala | |
| NORTHERN CRATER | Crater of SIRUNG | Lesser Sunda Islands | |
| NORTHERN CRATER | Crater of APO | Mindanao | |
| NORTHERN EPR-SEGMENT RO2 | Submarine volcano | Magnetism | Pacific Ocean (eastern) |
| NORTHERN EPR-SEGMENT RO3 | Submarine volcano | Magnetism | Pacific Ocean (eastern) |
| NORTHERN LAKE ABAYA FIELD | Synonym of HOBICHA CALDERA | Africa (northeastern) & Red Sea | |
| NORTHERN SHORE SPRINGS | Thermal Feature of AKADEMIA NAUK | Kamchatka Peninsula | |
| NORTHERN SYMMETRICAL SEGMENT | Synonym of COBB SEGMENT | Pacific Ocean (northern) | |
| NORTHWEST DOME | Dome of ST. HELENS | USA (Washington) | |
| NORTHWEST RIFT ZONE | Fissure vent of NEWBERRY | USA (Oregon) | |
| NOSOWSKOJ [POGROMNI] | Stratovolcano of WESTDAHL | Aleutian Islands | |
| NOSSA SENHORA DE LOURDES, PICO | Dome of TRINDADE | Atlantic Ocean (central) | |
| NOSSI BE | Synonym of NOSY-BE | Indian Ocean (western) | |
| NOSY-BE | Cinder cones | Holocene | Indian Ocean (western) |
| NOTCH BUTTE | Cone of SHOSHONE LAVA FIELD | USA (Idaho) | |
| NOTUCO | Synonym of COPAHUE | Central Chile & Argentina | |
| NOUVEAU | Crater of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| NOVAGRABLENOVA | Shield volcano of NYLGIMELKIN | Kamchatka Peninsula | |
| NOVARUPTA | Caldera | Historical | Alaska Peninsula |
| NOVEDAD | Fissure vent of GALERAS | Colombia | |
| NOVILLERO, VOLCAN | Cinder cone of MASCOTA VOLCANIC FIELD | México | |
| NOVO-BAKENING | Dome of BAKENING | Kamchatka Peninsula | |
| NOVY | Dome of BEZYMIANNY | Kamchatka Peninsula | |
| NOYA | Thermal Feature of KUJU | Ryukyu Islands & Kyushu | |
| NSHENYI | Crater of BUNYARUGURU | Africa (central) | |
| NSYMM SEGMENT | Synonym of COBB SEGMENT | Pacific Ocean (northern) | |
| NTOBE | Cone of KARISIMBI | Africa (central) | |
| NTUMBI | Dome of SW USANGU BASIN | Africa (eastern) | |
| NUAKAJU | Thermal Feature of PALUWEH | Lesser Sunda Islands | |
| NUBALYKICH | Shield volcano of UKSICHAN | Kamchatka Peninsula | |
| NUBES, LAS [LAS SIERRAS] | Pleistocene caldera of MASAYA | Nicaragua | |
| NUDO DE COROPUNA | Synonym of COROPUNA | Perú | |
| NUEVO DEL FUEGO, VOLCAN | Cinder cone of LANZAROTE | Canary Islands | |
| NUEVO MUNDO | Lava domes | Holocene? | Northern Chile, Bolivia & Argentina |
| NUEVO, EL | Synonym of NEGRO, CERRO | Nicaragua | |
| NUEVO, VOLCAN | Dome of CHILLAN, NEVADOS DE | Central Chile & Argentina | |
| NUEVO, VOLCAN [QUIZAPU] | Crater of AZUL, CERRO | Central Chile & Argentina | |
| NUEVO, VOLCAN [TINGUATON] | Crater of LANZAROTE | Canary Islands | |
| NUGERE, PUY DE LA | Cone of CHAINE DES PUYS | Western Europe | |
| NUHA LUA | Synonym of PALUWEH | Lesser Sunda Islands | |
| NUI DAT | Cone of BAS DONG NAI | Southeast Asia | |
| NUKABIRA | Thermal Feature of NIPESOTSU-MARUYAMA | Hokkaido | |
| NUKUAFO | Tuff cone of WALLIS ISLANDS | Samoan & Wallis Islands | |
| NUKUATEA | Tuff cone of WALLIS ISLANDS | Samoan & Wallis Islands | |
| NUKUFUTU | Tuff cone of WALLIS ISLANDS | Samoan & Wallis Islands | |
| NUKUTAAKIMUA | Tuff cone of WALLIS ISLANDS | Samoan & Wallis Islands | |
| NUKUTAPU | Tuff cone of WALLIS ISLANDS | Samoan & Wallis Islands | |
| NUMAJIRI | Thermal Feature of ADATARA | Honshu | |
| NUMAJIRI-YAMA | Synonym of ADATARA | Honshu | |
| NUMANO-TAIRA | Crater of BANDAI | Honshu | |
| NUMANO-TAIRA | Crater of ADATARA | Honshu | |
| NUMANOTAIRA GROUP | Vent of IZU-TOBU | Honshu | |
| NUMANUMA | Synonym of DAWSON STRAIT GROUP | New Guinea & D'Entrecasteaux Islands | |
| NUMAZAWA | Shield volcano | Radiocarbon | Honshu |
| NUMAZAWAKO | Caldera of NUMAZAWA | Honshu | |
| NUMUNDO | Maar of GARBUNA GROUP | New Britain | |
| NUNATAK DEL VIEDMA | Synonym of VIEDMA | Southern Chile & Argentina | |
| NUNIVAK ISLAND | Shield volcano | Holocene | Alaska (western) |
| NUNURCO | Dome of CHACANA | Ecuador | |
| NUNZIATA, MONTE | Cinder cone of ETNA | Italy | |
| NUOVO, MONTE | Tuff cone of CAMPI FLEGREI | Italy | |
| NUOVO, MONTE | Cinder cone of ETNA | Italy | |
| NUPURI-ONDO | Dome of KUTCHARO | Hokkaido | |
| NURETO, CERRO DE | Cinder cone of MICHOACAN-GUANAJUATO | México | |
| NUSA KUA | Synonym of PALUWEH | Lesser Sunda Islands | |
| NUSUYU | Dome of AZUMA | Honshu | |
| NUTAKU KAMUSHUPE | Synonym of DAISETSU | Hokkaido | |
| NUTAKU KAMUSYUPE | Synonym of DAISETSU | Hokkaido | |
| NU'U | Tuff cone of OFU-OLOSEGA | Samoan & Wallis Islands | |
| NU'ULUA | Tuff ring of UPOLU | Samoan & Wallis Islands | |
| NU'UTELE | Tuff ring of UPOLU | Samoan & Wallis Islands | |
| NW EIFUKU | Submarine volcano | Fumarolic | Izu, Volcano, & Mariana Islands |
| NW ROTA-1 | Submarine volcano | Historical | Izu, Volcano, & Mariana Islands |
| NYABUSA | Cone of NYIRAGONGO | Africa (central) | |
| NYABUSOZI | Tuff cone of FORT PORTAL | Africa (central) | |
| NYAGASHOLE | Cone of NYAMURAGIRA | Africa (central) | |
| NYAMATOTO | Cone of HOMA MOUNTAIN | Africa (eastern) | |
| NYAMBARAMO | Cone of NYAMURAGIRA | Africa (central) | |
| NYAMBENI HILLS | Shield volcano | Holocene | Africa (eastern) |
| NYAMERSINGERI | Crater of BUNYARUGURU | Africa (central) | |
| NYAMLAGIRA | Synonym of NYAMURAGIRA | Africa (central) | |
| NYAMULAGIRA | Synonym of NYAMURAGIRA | Africa (central) | |
| NYAMUNUKA | Tuff cone of KATWE-KIKORONGO | Africa (central) | |
| NYAMURAGIRA | Shield volcano | Historical | Africa (central) |
| NYAMUSHWA | Cone of NYIRAGONGO | Africa (central) | |
| NYAMUTSIBU | Cone of NYIRAGONGO | Africa (central) | |
| NYARUTSHIRU | Cone of NYIRAGONGO | Africa (central) | |
| NYASANJA | Cone of HOMA MOUNTAIN | Africa (eastern) | |
| NYASHEKE 1 | Cone of NYAMURAGIRA | Africa (central) | |
| NYASHEKE 2 | Cone of NYAMURAGIRA | Africa (central) | |
| NYEY | Submarine vent of REYKJANESHRYGGUR | Iceland (southwestern) | |
| NYHAHRAUN | Submarine vent of VESTMANNAEYJAR | Iceland (southern) | |
| NYI, LAKE | Maar of OKU VOLCANIC FIELD | Africa (western) | |
| NYIRAGONGO | Stratovolcano | Historical | Africa (central) |
| NYLGIMELKIN | Shield volcanoes | Radiocarbon | Kamchatka Peninsula |
| NYODO-SAN | Stratovolcano of ZAO | Honshu | |
| NYOS, LAKE | Maar of OKU VOLCANIC FIELD | Africa (western) | |
| NYOTAI-SAN | Synonym of NIKKO-SHIRANE | Honshu | |
| NYUDO-SAN | Cone of ZAO | Honshu | |
| NYUKI, DOINYA LA [OL DOINYO ONYOKE] | Stratovolcano of SUSWA | Africa (eastern) | |
| NYUKIE, OL DOINYO [OL DOINYO ONYOKE] | Stratovolcano of SUSWA | Africa (eastern) | |
| NYUNGU | Crater of BUNYARUGURU | Africa (central) | |
| NZONGWE | Cone of NGOZI | Africa (eastern) | |
| NZURU | Cone of NYAMURAGIRA | Africa (central) | |
| O KORO, MAUNGA | Pyroclastic Cone of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| O-AKAN | Stratovolcano of AKAN | Hokkaido | |
| O-ANA | Crater of MIYAKE-JIMA | Izu, Volcano, & Mariana Islands | |
| O-DAKE [HAKKODA-ODAKE] | Stratovolcano of HAKKODA GROUP | Honshu | |
| O-MINE | Pyroclastic Cone of NII-JIMA | Izu, Volcano, & Mariana Islands | |
| O-SIMA | Synonym of OSHIMA | Izu, Volcano, & Mariana Islands | |
| O-SIMA | Synonym of OSHIMA-OSHIMA | Hokkaido | |
| O-USU | Dome of USU | Hokkaido | |
| O-YUNUMA | Crater of KUTTARA | Hokkaido | |
| O'A CALDERA | Caldera | Holocene | Africa (northeastern) & Red Sea |
| OANA | Crater of AZUMA | Honshu | |
| OANA | Crater of MIYAKE-JIMA | Izu, Volcano, & Mariana Islands | |
| OANA | Crater of HACHIJO-JIMA | Izu, Volcano, & Mariana Islands | |
| OBA | Synonym of AOBA | Vanuatu | |
| OBAMA | Thermal Feature of UNZEN | Ryukyu Islands & Kyushu | |
| OBANDAI | Stratovolcano of BANDAI | Honshu | |
| OBERWINKEL | Maar of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| OBMANUVSHY | Cone of MALY SEMIACHIK | Kamchatka Peninsula | |
| OBRAJUELO, LAGUNA | Cone of IXTEPEQUE | Guatemala | |
| OBRINNISHOLAR | Crater Row of KRISUVIK | Iceland (southwestern) | |
| OBRUCHEVA (OBRUCHEV) | Cinder cone of VITIM PLATEAU | Russia (southeastern) | |
| OBRUK | Cone of HASAN DAGI | Turkey | |
| OBRUK | Crater of ERCIYES DAGI | Turkey | |
| OBRUK TEPE | Cone of ACIGOL-NEVSEHIR | Turkey | |
| OBSERVATORY VENT | Shield volcano of KILAUEA | Hawaiian Islands | |
| OBSIDIAN | Dome of INYO CRATERS | USA (California) | |
| OBUCHI | Crater of FUJI | Honshu | |
| OCCIDENTALES, CALDERAS [QUEMADAS] | Crater of LANZAROTE | Canary Islands | |
| OCEANA | Cone of SEAL NUNATAKS GROUP | Antarctica & South Sandwich Islands | |
| OCEANITE, MOUNT | Cone of MONTAGU ISLAND | Antarctica & South Sandwich Islands | |
| OCHENTA PESOS, CERRO | Cone of LAJAS, LAS | Nicaragua | |
| OCHKI | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| OCHKOVY | Cinder cone of KOSTAKAN | Kamchatka Peninsula | |
| OCLAYUCA | Cinder cone of CHICHINAUTZIN | México | |
| OCOTE, CERRO DEL | Synonym of CONCHAGUA | El Salvador & Honduras | |
| OCOTENCO | Maar of SERDAN-ORIENTAL | México | |
| OCOXUSCO, VOLCAN | Cinder cone of CHICHINAUTZIN | México | |
| OCUSACAYO | Shield volcano of CHICHINAUTZIN | México | |
| ODAIRA | Vent of IZU-TOBU | Honshu | |
| ODAMOI-SAN [TEBENKOV] | Cone of GROZNY GROUP | Kuril Islands | |
| ODELL BUTTE | Shield volcano of DAVIS LAKE | USA (Oregon) | |
| ODEM, MT. | Cinder cone of GOLAN HEIGHTS | Syria | |
| ODIAWO | Cone of HOMA MOUNTAIN | Africa (eastern) | |
| ODINOKAIA | Dome of AVACHINSKY | Kamchatka Peninsula | |
| ODNOBOKY | Pleistocene caldera of AKADEMIA NAUK | Kamchatka Peninsula | |
| OELOEBELOE | Synonym of HULUBELU | Sumatra | |
| OENA OENA | Synonym of COLO [UNA UNA] | Sulawesi | |
| OENGARAN | Synonym of UNGARAN | Java | |
| OEPAS, GUNUNG [UPAS] | Thermal Feature of DIENG VOLCANIC COMPLEX | Java | |
| OERTEALE | Synonym of ERTA ALE | Africa (northeastern) & Red Sea | |
| OFU-OLOSEGA | Shield volcanoes | Historical | Samoan & Wallis Islands |
| OGA-TAKE | Dome of NARUGO | Honshu | |
| OGARI-YAMA | Dome of USU | Hokkaido | |
| OGASAWARA-IO-JIMA | Synonym of IOTO [IWO-JIMA] | Izu, Volcano, & Mariana Islands | |
| OGI | Cone of IZU-TOBU | Honshu | |
| OGIGAHANA | Dome of KUJU | Ryukyu Islands & Kyushu | |
| OGMUNDARGIGAR | Crater Row of KRISUVIK | Iceland (southwestern) | |
| OGMUNDUR | Dome of KERLINGARFJOLL | Iceland (southwestern) | |
| OGNEDIESHUTSHAI GORA | Synonym of MAKUSHIN | Aleutian Islands | |
| OGURA-YAMA | Dome of TOWADA | Honshu | |
| OHAAKI [BROADLANDS] | Thermal Feature of REPOROA | New Zealand | |
| OHACHI | Crater of KIRISHIMA | Ryukyu Islands & Kyushu | |
| OHACHI | Crater of NIIGATA-YAKE-YAMA | Honshu | |
| OHACHI | Crater of IWATE | Honshu | |
| OHACHIDAIRA | Pleistocene caldera of DAISETSU | Hokkaido | |
| OHAKI [BROADLANDS] | Thermal Feature of REPOROA | New Zealand | |
| OHAKUNE | Tuff ring of RUAPEHU | New Zealand | |
| OHALAHOUM [DALAHUM] | Cone of AMBRYM | Vanuatu | |
| OHANABE-YAMA | Stratovolcano of TOWADA | Honshu | |
| OHATA-IKE | Crater of KIRISHIMA | Ryukyu Islands & Kyushu | |
| OHATA-YAMA | Stratovolcano of KIRISHIMA | Ryukyu Islands & Kyushu | |
| OHATANO | Maar of IZU-TOBU | Honshu | |
| OHATI [OHACHI] | Crater of KIRISHIMA | Ryukyu Islands & Kyushu | |
| OHATI [OHACHI] | Crater of NIIGATA-YAKE-YAMA | Honshu | |
| OHATI [OHACHI] | Crater of IWATE | Honshu | |
| OHEINUI | Dome of MAROA | New Zealand | |
| OHINEMUTU | Thermal Feature of ROTORUA | New Zealand | |
| OHIRA-YAMA | Cone of FUJI | Honshu | |
| OIAKOBA | Synonym of ALAID | Kuril Islands | |
| OIAU, MOUNT | Stratovolcano of DAWSON STRAIT GROUP | New Guinea & D'Entrecasteaux Islands | |
| OIAVA-AI, MOUNT | Cone of GOODENOUGH | New Guinea & D'Entrecasteaux Islands | |
| OIBOR, OLDOINYO | Synonym of KILIMANJARO | Africa (eastern) | |
| OIKE | Vent of IZU-TOBU | Honshu | |
| OIKE-MINAMI | Vent of IZU-TOBU | Honshu | |
| OILE, PUU | Cone of HALEAKALA | Hawaiian Islands | |
| OIRA | Pumice cone of MAYOR ISLAND | New Zealand | |
| OIRASE | Cone of TOWADA | Honshu | |
| OJIGOKU | Thermal Feature of IWATE | Honshu | |
| OJIMA | Cone of FUKUE-JIMA | Ryukyu Islands & Kyushu | |
| OJO DE AGUA DE LA VIRGEN, CERRO EL | Stratovolcano of APANECA RANGE | El Salvador & Honduras | |
| OJO DE AGUA, CERRO | Cinder cone of CINOTEPEQUE, CERRO | El Salvador & Honduras | |
| OJO DE AGUA, CERRO | Cinder cone of PILAS, LAS | Nicaragua | |
| OJO DE AGUA, LOMA | Cinder cone of SAN CRISTOBAL | Nicaragua | |
| OJO DEL MAR | Synonym of COATEPEQUE CALDERA | El Salvador & Honduras | |
| OJO DEL SALADO | Synonym of OJOS DEL SALADO, NEVADOS | Northern Chile, Bolivia & Argentina | |
| OJO-DAKE | Stratovolcano of ASO | Ryukyu Islands & Kyushu | |
| OJOCHAL, CERRO [EL BOSQUE] | Dome of ROTA | Nicaragua | |
| OJOS DEL SALADO, NEVADOS | Stratovolcano | Tephrochronology | Northern Chile, Bolivia & Argentina |
| OKA PLATEAU | Cinder cones | Holocene | Russia (southeastern) |
| OKA UPLAND VOLC FIELD | Synonym of OKA PLATEAU | Russia (southeastern) | |
| OKAIHAU | Cone of KAIKOHE-BAY OF ISLANDS | New Zealand | |
| OKAMA | Crater of ASAMA | Honshu | |
| OKAMA | Crater of ZAO | Honshu | |
| OKAMA | Crater of IWATE | Honshu | |
| OKAMADO-YAMA | Stratovolcano of ASO | Ryukyu Islands & Kyushu | |
| OKARO, LAKE | Crater of REPOROA | New Zealand | |
| OKATA | Stratovolcano of OSHIMA | Izu, Volcano, & Mariana Islands | |
| OKATAINA | Lava domes | Historical | New Zealand |
| OKE-NUMA | Crater of AZUMA | Honshu | |
| OKEANSKOE | Thermal Feature of BARANSKY | Kuril Islands | |
| OKI-DOGO | Shield volcano | Anthropology | Honshu |
| OKINAWA-TORI-SHIMA | Synonym of IWO-TORI-SHIMA | Ryukyu Islands & Kyushu | |
| OKISE | Cone of SAKURA-JIMA | Ryukyu Islands & Kyushu | |
| OKMOK | Shield volcano | Historical | Aleutian Islands |
| OKOLI | Crater of CAMEROON | Africa (western) | |
| OKOMA-YAMA | Synonym of KURIKOMA | Honshu | |
| OKPO HILL | Cone of LOWER CHINDWIN | Southeast Asia | |
| OKU VOLCANIC FIELD | Stratovolcano | Holocene? | Africa (western) |
| OKU, MOUNT | Stratovolcano of OKU VOLCANIC FIELD | Africa (western) | |
| OKUNO-FUJI | Synonym of IWAKI | Honshu | |
| OL BURU, DOINYO | Synonym of EBURRU, OL DOINYO | Africa (eastern) | |
| OL DOINYO | See proper name (e.g. LENGAI, OL DOINYO) | Masai for MT. | |
| OL KOKWE | Shield volcano | Holocene | Africa (eastern) |
| OL MOROUK | Cone of KILIMANJARO | Africa (eastern) | |
| OL OLONGOT | Synonym of LONGONOT | Africa (eastern) | |
| OLAF | Cone of TRISTAN DA CUNHA | Atlantic Ocean (southern) | |
| OLAI, PUU | Cone of HALEAKALA | Hawaiian Islands | |
| OLAKKRAN | Cone of ERCIYES DAGI | Turkey | |
| OLCA SUR, CERRO | Stratovolcano of OLCA-PARUMA | Northern Chile, Bolivia & Argentina | |
| OLCA-PARUMA | Stratovolcanoes | Historical | Northern Chile, Bolivia & Argentina |
| OLD BOGOSLOF [CASTLE ROCK] | Dome of BOGOSLOF | Aleutian Islands | |
| OLD BOOBY HILL | Dome of SABA | West Indies | |
| OLD CRATER | Thermal Feature of PERBAKTI-GAGAK | Java | |
| OLD CRATER, THE | Crater of SOUFRIERE ST. VINCENT | West Indies | |
| OLDOINYO | See proper name (e.g. OIBOR, OLDOINYO) | Masai for MT. | |
| OLDONYO | See proper name (e.g. SAMBU, OLDONYO) | Masai for MT. | |
| OLDUGIGAR | Fissure vent of HEKLA | Iceland (southern) | |
| OLENGURUONI | Synonym of OLKARIA | Africa (eastern) | |
| OLENIY [OLENY] | Shield volcano of ZAOZERNY | Kamchatka Peninsula | |
| OLENY | Shield volcano of ZAOZERNY | Kamchatka Peninsula | |
| OLGARIA [OLKARIA HILL] | Pumice cone of OLKARIA | Africa (eastern) | |
| OLGORETI, OL DOINYO | Cone of CHYULU HILLS | Africa (eastern) | |
| OLGURTAM | Cone of CHYULU HILLS | Africa (eastern) | |
| OLIBANO, MT. | Dome of CAMPI FLEGREI | Italy | |
| OLILA, MT. | Cone of SAN PABLO VOLCANIC FIELD | Luzon | |
| OLIVAS, CERRO LOS | Cone of SUCHITAN | Guatemala | |
| OLIVE, MT. | Cone of SHISHALDIN | Aleutian Islands | |
| OLKARIA | Pumice cones | Radiocarbon | Africa (eastern) |
| OLKARIA HILL | Pumice cone of OLKARIA | Africa (eastern) | |
| OLKOVIY | Shield volcano of OLKOVIY VOLCANIC GROUP | Kamchatka Peninsula | |
| OLKOVIY VOLCANIC GROUP | Volcanic field | Holocene | Kamchatka Peninsula |
| OLLA DE CARNE | Cone of TENORIO | Costa Rica | |
| OLLA DE FLORES | Maar of MICHOACAN-GUANAJUATO | México | |
| OLLA DE ZINTORA [HOYA DE CINTORA] | Maar of MICHOACAN-GUANAJUATO | México | |
| OLLA SPRING | Thermal Feature of BANAHAW | Luzon | |
| OLLA, CERRO LA | Cinder cone of CHINGO | Guatemala | |
| OLLA, CERRO LA | Cinder cone of SANTA ANA | El Salvador & Honduras | |
| OLLADA DE LOS GEISERS DEL TATIO | Synonym of TATIO, EL | Northern Chile, Bolivia & Argentina | |
| OLLADA, LA | Crater of SAN CRISTOBAL | Nicaragua | |
| OLLAGUA | Synonym of OLLAGUE | Northern Chile, Bolivia & Argentina | |
| OLLAGUE | Stratovolcano | Holocene? | Northern Chile, Bolivia & Argentina |
| OLLETA, LA | Dome of RUIZ, NEVADO DEL | Colombia | |
| OLMEDO | Synonym of SANTIAGO | Galápagos Islands | |
| OLMOTI | Cone of CHYULU HILLS | Africa (eastern) | |
| OLOLBUTOT | Fissure vent of OLKARIA | Africa (eastern) | |
| OLOLICA | Cinder cone of CHICHINAUTZIN | México | |
| OLOMANU | Cone of TA'U | Samoan & Wallis Islands | |
| OLOMANU TAI | Cone of SAVAI'I | Samoan & Wallis Islands | |
| OLOMANU UTA | Cone of SAVAI'I | Samoan & Wallis Islands | |
| OLOMATIMU | Cone of TA'U | Samoan & Wallis Islands | |
| OLOMOANA | Shield volcano of TUTUILA | Samoan & Wallis Islands | |
| OLONONGOT | Synonym of LONGONOT | Africa (eastern) | |
| OLORERER | Cone of CHYULU HILLS | Africa (eastern) | |
| OLOT VOLCANIC FIELD | Pyroclastic cones | Holocene | Western Europe |
| OLOTANIA | Cone of TA'U | Samoan & Wallis Islands | |
| OLOTELE | Cone of TUTUILA | Samoan & Wallis Islands | |
| OLYMPE | Cone of AMSTERDAM ISLAND | Indian Ocean (southern) | |
| OMAE-DAKE | Cone of AKITA-KOMAGA-TAKE | Honshu | |
| OMANAGO GROUP | Lava domes | Holocene | Honshu |
| OMAOKOILI | Cone of MAUNA KEA | Hawaiian Islands | |
| OMAPERE | Cone of KAIKOHE-BAY OF ISLANDS | New Zealand | |
| OMATE (OMATO) | Synonym of HUAYNAPUTINA | Perú | |
| OMBA | Synonym of AOBA | Vanuatu | |
| OMBLIGO, EL | Dome of TOLUCA, NEVADO DE | México | |
| OMBUS | Cinder cone of YASUR | Vanuatu | |
| OMETEPE | Synonym of CONCEPCION | Nicaragua | |
| OMINE | Cinder cone of ASO | Ryukyu Islands & Kyushu | |
| OMO ANGA, MAUNGA | Pyroclastic Cone of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| OMORI-YAMA | Cone of ZAO | Honshu | |
| OMOTURCO | Dome of ATACAZO | Ecuador | |
| OMURO | Crater of IWATE | Honshu | |
| OMURO-YAMA | Cinder cone of IZU-TOBU | Honshu | |
| OMURO-YAMA | Cone of FUJI | Honshu | |
| OMURO-YAMA VOLCANO GROUP | Synonym of IZU-TOBU | Honshu | |
| OMUROYAMA-AMAGI GROUP | Synonym of IZU-TOBU | Honshu | |
| ON-DAKE | Cone of FUKUE-JIMA | Ryukyu Islands & Kyushu | |
| ON-TAKE | Stratovolcano of SUWANOSE-JIMA | Ryukyu Islands & Kyushu | |
| ON-TAKE | Stratovolcano of NAKANO-SHIMA | Ryukyu Islands & Kyushu | |
| ON-TAKE | Complex volcano | Historical | Honshu |
| ON-TAKE [MI-TAKE] | Dome of AKUSEKI-JIMA | Ryukyu Islands & Kyushu | |
| ONAGAREMARU-YAMA | Cone of FUJI | Honshu | |
| ONAMEDAKE [OMAE-DAKE] | Cone of AKITA-KOMAGA-TAKE | Honshu | |
| ONAMI-IKE | Crater of KIRISHIMA | Ryukyu Islands & Kyushu | |
| ONASHIROKO | Crater of IWATE | Honshu | |
| ONDVERDARNESHOLAR | Shield volcano of SNAEFELLSJOKULL | Iceland (western) | |
| ONE TREE HILL | Cone of AUCKLAND FIELD | New Zealand | |
| ONE, VUSI | Cone of AOBA | Vanuatu | |
| ONEPU | Cone of OKATAINA | New Zealand | |
| ONEPU SPRINGS | Thermal Feature of OKATAINA | New Zealand | |
| ONGARATO | Thermal Feature of MAROA | New Zealand | |
| ONIGAJO | Stratovolcano of IWATE | Honshu | |
| ONIGAJO | Dome of AKITA-YAKE-YAMA | Honshu | |
| ONIGAZYO [ONIGAJO] | Stratovolcano of IWATE | Honshu | |
| ONIGAZYO [ONIGAJO] | Dome of AKITA-YAKE-YAMA | Honshu | |
| ONIKOBE | Caldera | Pleistocene-Geysers | Honshu |
| ONIWA-OKUNIWA | Cone of FUJI | Honshu | |
| ONMAE-DAKE | Stratovolcano of ZAO | Honshu | |
| ONNETO-YAMA [BUREVESTNIK] | Cone of BOGATYR RIDGE | Kuril Islands | |
| ONOEPOTO | Tuff ring of AUCKLAND FIELD | New Zealand | |
| ONSEN-DAKE | Synonym of UNZEN | Ryukyu Islands & Kyushu | |
| ONTAR | Cone of GAUA | Vanuatu | |
| ONU | Cone of TODOKO-RANU | Halmahera | |
| ONYOKE, OL DOINYO | Stratovolcano of SUSWA | Africa (eastern) | |
| O'O, PUU | Cone of KILAUEA | Hawaiian Islands | |
| OO-SIMA | Synonym of OSHIMA | Izu, Volcano, & Mariana Islands | |
| OOJINI | Cone of CHYULU HILLS | Africa (eastern) | |
| OONAMI-IKE [ONAMI-IKE] | Crater of KIRISHIMA | Ryukyu Islands & Kyushu | |
| OONYU-IKE | Crater of NORIKURA | Honshu | |
| OOSHIMA | Synonym of OSHIMA | Izu, Volcano, & Mariana Islands | |
| OPAL CONE | Cone of GARIBALDI | Canada | |
| OPALA | Caldera | Historical | Kamchatka Peninsula |
| OPALINSKAJA (OPALNAJA) | Synonym of OPALA | Kamchatka Peninsula | |
| OPALNAJA | Synonym of OPALA | Kamchatka Peninsula | |
| OPALNY | Dome of BOLSHOI SEMIACHIK | Kamchatka Peninsula | |
| OPALSKAIA SOPKA | Synonym of OPALA | Kamchatka Peninsula | |
| OPHIR | Synonym of TALAKMAU | Sumatra | |
| OPIPI, VOLCAN | Pyroclastic Cone of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| OPO BAY | Tuff cone of MAYOR ISLAND | New Zealand | |
| OPOURI, LAKE [LAKE NGAPOURI] | Crater of REPOROA | New Zealand | |
| OPUTATESHIKE | Dome of KUTCHARO | Hokkaido | |
| OPUTATESIKE [OPUTATESHIKE] | Dome of KUTCHARO | Hokkaido | |
| ORAEFAJOKULL | Stratovolcano | Historical | Iceland (southeastern) |
| ORAKEI BASIN | Tuff ring of AUCKLAND FIELD | New Zealand | |
| ORAKEIKORAKO | Thermal Feature of MAROA | New Zealand | |
| ORCA | Crater of WHITE ISLAND | New Zealand | |
| ORCHILLA, MONTANA DE | Cinder cone of HIERRO | Canary Islands | |
| ORCOPAMPA VOLC FIELD | Synonym of ANDAHUA-ORCOPAMPA | Perú | |
| OREJA, CERRO DE LA | Synonym of NEGRO DE MAYASQUER, CERRO | Colombia | |
| ORENGINGNAI | Pumice cone of OLKARIA | Africa (eastern) | |
| ORFIALDSJOKULL | Synonym of ORAEFAJOKULL | Iceland (southeastern) | |
| ORGANOS, LOS | Cinder cone of GLORIA, LA | México | |
| ORI, MAUNGA | Pyroclastic Cone of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| ORILLA DEL MONTE | Shield volcano of HUMEROS, LOS | México | |
| ORION SEAMOUNT | Synonym of MONOWAI SEAMOUNT | Kermadec Islands | |
| ORIR | Crater of SURETAMATAI | Vanuatu | |
| ORITO, MAUNGA | Dome of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| ORIZABA, PICO DE | Stratovolcano | Historical | México |
| ORLANDO, MT. | Cone of FOGO | Cape Verde Islands | |
| ORO, CERRO DE | Dome of TOLIMAN | Guatemala | |
| OROK, OLDOINYO | Synonym of MERU | Africa (eastern) | |
| OROKURA [KANEDA] | Dome of OMANAGO GROUP | Honshu | |
| OROMONTIQUE, CERRO | Lava cone of TIGRE, EL | El Salvador & Honduras | |
| ORONGATEA | Pumice cone of MAYOR ISLAND | New Zealand | |
| OROSCOCHA | Dome of QUIMSACHATA | Perú | |
| OROSI | Stratovolcanoes | Holocene? | Costa Rica |
| OROSI-CACAO | Synonym of OROSI | Costa Rica | |
| OROSILITO, VOLCAN | Stratovolcano of OROSI | Costa Rica | |
| OROTA | Synonym of ROTA | Nicaragua | |
| ORPHAN BUTTE | Cone of NEWBERRY | USA (Oregon) | |
| ORUAHINAWE | Dome of MAROA | New Zealand | |
| ORUANUI | Dome of MAROA | New Zealand | |
| ORUKA [TATARINOV] | Stratovolcano of CHIKURACHKI | Kuril Islands | |
| OS, PUIG DE L' | Cone of OLOT VOLCANIC FIELD | Western Europe | |
| OSAWA | Dome of KOZU-SHIMA | Izu, Volcano, & Mariana Islands | |
| OSBORNE BUTTE | Dome of YELLOWSTONE | USA (Wyoming) | |
| OSCOSTAR | Synonym of EASTERN GEMINI SEAMOUNT | Pacific Ocean (southwestern) | |
| OSHIDASHIZAWA | Crater of KOMAGA-TAKE | Hokkaido | |
| OSHIMA | Stratovolcano | Historical | Izu, Volcano, & Mariana Islands |
| OSHIMA-FUJI | Synonym of KOMAGA-TAKE | Hokkaido | |
| OSHIMA-OSHIMA | Stratovolcano | Historical | Hokkaido |
| OSHO-YAMA | Stratovolcano of ADATARA | Honshu | |
| OSIMA-O-SIMA | Synonym of OSHIMA-OSHIMA | Hokkaido | |
| OSKJUVATN | Caldera of ASKJA | Iceland (northeastern) | |
| OSOBAYA PEAK | Cone of ALAID | Kuril Islands | |
| OSOGOT | Cone of CHYULU HILLS | Africa (eastern) | |
| OSORE-YAMA | Stratovolcano | Historical | Honshu |
| OSORNO | Stratovolcano | Historical | Southern Chile & Argentina |
| OSTANETS | Shield volcanoes | Holocene | Kamchatka Peninsula |
| OSTANETS | Dome of UZON | Kamchatka Peninsula | |
| OSTANETS | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| OSTRAYA | Synonym of OSTRY | Kamchatka Peninsula | |
| OSTRAYA ZIMINA | Stratovolcano of ZIMINA | Kamchatka Peninsula | |
| OSTRIY | Synonym of OSTRY | Kamchatka Peninsula | |
| OSTRY | Stratovolcano | Holocene | Kamchatka Peninsula |
| OSTRY TOLBACHIK | Stratovolcano of TOLBACHIK | Kamchatka Peninsula | |
| OSTUA, CERRO DE | Cinder cone of SAN DIEGO | El Salvador & Honduras | |
| OSYO-YAMA [OSHO-YAMA] | Stratovolcano of ADATARA | Honshu | |
| OTAKE | Thermal Feature of KUJU | Ryukyu Islands & Kyushu | |
| OTAKE [ON-TAKE] | Stratovolcano of SUWANOSE-JIMA | Ryukyu Islands & Kyushu | |
| OTARA HILL | Cone of AUCKLAND FIELD | New Zealand | |
| OTDELNIY | Shield volcanoes | Holocene | Kamchatka Peninsula |
| OTEI SPRINGS | Thermal Feature of OKATAINA | New Zealand | |
| OTKHODYASHCHY | Cone of MUTNOVSKY | Kamchatka Peninsula | |
| OTKRYTAYA | Cone of UZON | Kamchatka Peninsula | |
| OTKRYTYI | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| OTOMEKO-YAMA | Synonym of FUJI | Honshu | |
| OTOROA | Cone of KAIKOHE-BAY OF ISLANDS | New Zealand | |
| OTRO LADO, CERRO EL | Cinder cone of CHIQUIMULA VOLCANIC FIELD | Guatemala | |
| OTSUBO-NO-IKE | Crater of AKITA-KOMAGA-TAKE | Honshu | |
| OTTOMOI | Synonym of EBEKO | Kuril Islands | |
| OTUATAUA | Cone of AUCKLAND FIELD | New Zealand | |
| OTUBO-NO-IKE [OTSUBO-NO-IKE] | Crater of AKITA-KOMAGA-TAKE | Honshu | |
| OTURU | Pumice cone of MAYOR ISLAND | New Zealand | |
| OTUTARARA SPRINGS | Thermal Feature of ROTORUA | New Zealand | |
| OTU'U, MAUNGA | Pyroclastic Cone of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| OTVAZHNY | Crater of TIATIA | Kuril Islands | |
| OUAHA | Dome of TAUPO | New Zealand | |
| OUKCEM | Maar of MANZAZ VOLCANIC FIELD | Africa (northern) | |
| OULENOU | Cone of TRAITOR'S HEAD | Vanuatu | |
| OUNDA GINNA KOMA | Tuff cone of ARDOUKOBA | Africa (northeastern) & Red Sea | |
| OUSON | Synonym of UZON | Kamchatka Peninsula | |
| OUTCAST HILL | Cone of SPECTRUM RANGE | Canada | |
| OUTHWAITE PARK | Cone of AUCKLAND FIELD | New Zealand | |
| OVAL CRATER | Crater of DIAMOND CRATERS | USA (Oregon) | |
| OVALNAYA ZIMINA | Stratovolcano of ZIMINA | Kamchatka Peninsula | |
| OVALNYE | Dome of BOLSHOI SEMIACHIK | Kamchatka Peninsula | |
| OVE | Synonym of SIMBO | Bougainville & Solomon Islands | |
| OVE, LAKE | Crater of SIMBO | Bougainville & Solomon Islands | |
| OVEJERO, CERRO EL | Cone of SUCHITAN | Guatemala | |
| OVERO, CERRO | Maar | Holocene? | Northern Chile, Bolivia & Argentina |
| OVERO, VOLCAN | Stratovolcano of ATUEL, CALDERA DEL | Central Chile & Argentina | |
| OW RIG | Stratovolcano of SURETAMATAI | Vanuatu | |
| OW SORLAV-OW PLANMEN | Stratovolcano of SURETAMATAI | Vanuatu | |
| OWAKUDANI | Thermal Feature of HAKONE | Honshu | |
| OXI | Fissure vent of HEKLA | Iceland (southern) | |
| OYAGUA | Synonym of OLLAGUE | Northern Chile, Bolivia & Argentina | |
| OYAHUE | Synonym of OLLAGUE | Northern Chile, Bolivia & Argentina | |
| OYAKOBA-YAMA (OYAKOBATSKA) | Synonym of ALAID | Kuril Islands | |
| OYAMA | Caldera of MIYAKE-JIMA | Izu, Volcano, & Mariana Islands | |
| OYAMELES | Dome of HUMEROS, LOS | México | |
| OYUNUMA | Crater of KUTTARA | Hokkaido | |
| OZERNAIA | Synonym of ILYINSKY | Kamchatka Peninsula | |
| OZERNAYA | Synonym of OZERNOY | Kamchatka Peninsula | |
| OZERNOVSKY POTOK | Vent of ELOVSKY | Kamchatka Peninsula | |
| OZERNOY | Shield volcano | Holocene | Kamchatka Peninsula |
| OZERNOY | Cone of KRASHENINNIKOV | Kamchatka Peninsula | |
| OZERNOY | Shield volcano of ELOVSKY | Kamchatka Peninsula | |
| OZIGOKU [OJIGOKU] | Thermal Feature of IWATE | Honshu | |
| OZUKUSHI-YAMA | Dome of OSORE-YAMA | Honshu | |
| OZUKUSI-YAMA [OZUKUSHI-YAMA] | Dome of OSORE-YAMA | Honshu | |
| OZYO-DAKE [OJO-DAKE] | Stratovolcano of ASO | Ryukyu Islands & Kyushu | |
| PA HILL | Dome of WHALE ISLAND | New Zealand | |
| PABELLON MAURAS, VOLCAN | Cinder cone of ANDAHUA-ORCOPAMPA | Perú | |
| PABELLON, CERRO | Dome of AZUFRE, CERRO DEL | Northern Chile, Bolivia & Argentina | |
| PACARACUA, CERRO | Shield volcano of MICHOACAN-GUANAJUATO | México | |
| PACAYA | Complex volcano | Historical | Guatemala |
| PACAYAL, EL | Synonym of CHINAMECA | El Salvador & Honduras | |
| PACAYAL, LAGUNA SECA EL | Crater of CHINAMECA | El Salvador & Honduras | |
| PACHA, LOMA | Cinder cone of TABURETE | El Salvador & Honduras | |
| PACHECO, CABECOS DO | Cone of FAYAL | Azores | |
| PACHO, CERRO | Dome of COATEPEQUE CALDERA | El Salvador & Honduras | |
| PACHUCA | Dome of ZITACUARO-VALLE DE BRAVO | México | |
| PACO | Stratovolcano | Anthropology | Mindanao |
| PADDO | Synonym of ADAMS | USA (Washington) | |
| PAEH, KAWAH | Thermal Feature of SALAK | Java | |
| P'AEKTU-SAN | Synonym of CHANGBAISHAN | China (eastern) | |
| PAGAN | Stratovolcanoes | Historical | Izu, Volcano, & Mariana Islands |
| PAGERKANDANG | Cone of DIENG VOLCANIC COMPLEX | Java | |
| PAGERKANDANG, KAWAH | Thermal Feature of DIENG VOLCANIC COMPLEX | Java | |
| PAGERLUHIR, GUNUNG | Vent of SUNDORO | Java | |
| PAGO | Pleistocene caldera of TUTUILA | Samoan & Wallis Islands | |
| PAGO | Caldera | Historical | New Britain |
| PAHANGAHANGA | Cone of KAIKOHE-BAY OF ISLANDS | New Zealand | |
| PAHTO | Synonym of ADAMS | USA (Washington) | |
| PAILAS, LAS | Thermal Feature of RINCON DE LA VIEJA | Costa Rica | |
| PAIMUN CONES | Cinder cone of LANIN | Central Chile & Argentina | |
| PAINT POT CRATER | Crater of MEDICINE LAKE | USA (California) | |
| PAISITA, EL | Crater of GALERAS | Colombia | |
| PAISLEY | Cinder cone of CRATERS OF THE MOON | USA (Idaho) | |
| PAJALITOS, LOMA LOS | Cinder cone of SAN DIEGO | El Salvador & Honduras | |
| PAJANALES, CERRO | Stratovolcano of PULAR | Northern Chile, Bolivia & Argentina | |
| PAJANG [PAYANG] | Crater of BATUR | Lesser Sunda Islands | |
| PAJARITA, CERRO LA | Cone of FLORES | Guatemala | |
| PAJARITOS | Cone of ANTILLANCA GROUP | Central Chile & Argentina | |
| PAJAROS | Synonym of FARALLON DE PAJAROS | Izu, Volcano, & Mariana Islands | |
| PAJITA, CERRO | Dome of VALLE, EL | Panamá | |
| PAJO | Thermal Feature of PINATUBO | Luzon | |
| PAJONALES, CERRO | Stratovolcano of PULAR | Northern Chile, Bolivia & Argentina | |
| PAKA | Shield volcano | Ar/Ar | Africa (eastern) |
| PAKIS, RANU | Maar of SEMERU | Java | |
| PAKIS, RANU | Maar of LAMONGAN | Java | |
| PAKKA | Synonym of PAKA | Africa (eastern) | |
| PAKUSHIN | Cone of MAKUSHIN | Aleutian Islands | |
| PAKUWAJA | Cone of DIENG VOLCANIC COMPLEX | Java | |
| PAKUWODJO [PAKUWAJA] | Cone of DIENG VOLCANIC COMPLEX | Java | |
| PAKUWOJO [PAKUWAJA] | Cone of DIENG VOLCANIC COMPLEX | Java | |
| PALABUNO HOT SPRING | Thermal Feature of BALUT | Mindanao | |
| PALACPAQUEN, LAKE | Maar of SAN PABLO VOLCANIC FIELD | Luzon | |
| PALAEOCHORI BAY | Thermal Feature of MILOS | Greece | |
| PALAMITO | Cinder cone of CHICHINAUTZIN | México | |
| PALANGIAGIA | Stratovolcano of RABAUL | New Britain | |
| PALAO RAGANG | Synonym of RAGANG | Mindanao | |
| PALAR | Synonym of PULAR | Northern Chile, Bolivia & Argentina | |
| PALEG | Cone of BATUR | Lesser Sunda Islands | |
| PALEI-AIKE VOLCANIC FIELD | Cinder cones | Anthropology | Southern Chile & Argentina |
| PALENA VOLCANIC GROUP | Cinder cones | Holocene | Southern Chile & Argentina |
| PALEO-SEMIACHIK | Stratovolcano of MALY SEMIACHIK | Kamchatka Peninsula | |
| PALEOSTROMBOLI | Stratovolcano of STROMBOLI | Italy | |
| PALETERA | Cone of PURACE | Colombia | |
| PALFFY | Cone of JAN MAYEN | Atlantic Ocean (Jan Mayen) | |
| PALINPINON | Thermal Feature of CUERNOS DE NEGROS | Central Philippines | |
| PALIOREWMA | Thermal Feature of MILOS | Greece | |
| PALIRON | Dome of PACO | Mindanao | |
| PALIZADA, VOLCAN | Stratovolcano of DESCABEZADO GRANDE | Central Chile & Argentina | |
| PALLAS PEAK | Stratovolcano of KETOI | Kuril Islands | |
| PALMA SOL VOLC FIELD | Synonym of ATLIXCOS, LOS | México | |
| PALMA SUR, CERRITO LA | Dome of ILOPANGO | El Salvador & Honduras | |
| PALMAS, CERRO LAS | Cinder cone of MASCOTA VOLCANIC FIELD | México | |
| PALMAS, CERRO LAS | Stratovolcano of TECAPA | El Salvador & Honduras | |
| PALMAS, MONTANA DE LAS | Cone of GRAN CANARIA | Canary Islands | |
| PALMIRA, CERROS | Stratovolcano of PLATANAR | Costa Rica | |
| PALOC | Dome of LEONARD RANGE | Mindanao | |
| PALOE | Synonym of PALUWEH | Lesser Sunda Islands | |
| PALOMO | Stratovolcano | Holocene | Central Chile & Argentina |
| PALOMOS, CERRO LAS | Cone of MOMOTOMBO | Nicaragua | |
| PALOWE | Synonym of PALUWEH | Lesser Sunda Islands | |
| PALSFJALL | Cone of GRIMSVOTN | Iceland (northeastern) | |
| PALUWEH | Stratovolcano | Historical | Lesser Sunda Islands |
| PAM LIN | Cone of ST. ANDREW STRAIT | Admiralty Islands | |
| PAM MANDIAN | Cone of ST. ANDREW STRAIT | Admiralty Islands | |
| PAMINTA | Thermal Feature of CAGUA | Luzon | |
| PAMOCTAN | Dome of CAMIGUIN DE BABUYANES | North of Luzon | |
| PAMPA DE PALACIO | Shield volcano of CHACHANI, NEVADO | Perú | |
| PAMPA LUXAR | Synonym of PAMPA LUXSAR | Northern Chile, Bolivia & Argentina | |
| PAMPA LUXSAR | Volcanic field | Holocene? | Northern Chile, Bolivia & Argentina |
| PAN DE AZUCAR | Synonym of AUGUSTINE | Alaska (southwestern) | |
| PAN DE AZUCAR | Synonym of ARENAL | Costa Rica | |
| PAN DE AZUCAR | Stratovolcano of PURACE | Colombia | |
| PAN DE AZUCAR [PICO DEL TEIDE] | Stratovolcano of TENERIFE | Canary Islands | |
| PAN-PAN-LUNG-WAN [BANBANLONGWAN] | Crater of LONGGANG GROUP | China (eastern) | |
| PANALVIA, CERRO | Dome of IPALA | Guatemala | |
| PANAMAO | Dome of BILIRAN | Central Philippines | |
| PANAMAO | Dome of BILIRAN | Central Philippines | |
| PANAMAO, MT. | Crater of JOLO | Sulu Islands | |
| PANANDJAKAN [PANANJAKAN] | Cone of TENGGER CALDERA | Java | |
| PANANJAKAN | Cone of TENGGER CALDERA | Java | |
| PANAREA | Stratovolcano | Holocene? | Italy |
| PANAY | Stratovolcano | Pleistocene-Fumarolic | Luzon |
| PANDAN | Synonym of PENDAN | Sumatra | |
| PANDAN, GUNUNG | Cone of BATUR | Lesser Sunda Islands | |
| PANDERE HILL | Cone of KIEYO | Africa (eastern) | |
| PANDI, LAKE | Maar of SAN PABLO VOLCANIC FIELD | Luzon | |
| PANDU | Cone of IYANG-ARGAPURA | Java | |
| PANECILLO, CERRO EL | Dome of MOJANDA | Ecuador | |
| PANGALU | Thermal Feature of GARUA HARBOUR | New Britain | |
| PANGASAHAN, KAWAH | Thermal Feature of KAMOJANG, KAWAH | Java | |
| PANGASUN, MT. | Stratovolcano of BABUYAN CLARO | North of Luzon | |
| PANGERANGO [PANGRANGO] | Twin volcano of GEDE | Java | |
| PANGGILINGAN, KAWAH | Thermal Feature of KAMOJANG, KAWAH | Java | |
| PANGGUJANGAN BADAK | Crater of TANGKUBANPARAHU | Java | |
| PANGGUNGAN | Crater of LAWU | Java | |
| PANGGUYANGAN BADAK | Crater of TANGKUBANPARAHU | Java | |
| PANGKALAN | Pleistocene caldera of KAMOJANG, KAWAH | Java | |
| PANGO | Synonym of PAGO | New Britain | |
| PANGONAN | Cone of DIENG VOLCANIC COMPLEX | Java | |
| PANGRANGO | Twin volcano of GEDE | Java | |
| PANGUES, LOS | Cone of ANTUCO | Central Chile & Argentina | |
| PANGUIPULLI | Synonym of MOCHO-CHOSHUENCO | Central Chile & Argentina | |
| PANGUJAAN [DANAN] | Thermal Feature of MAHAGNAO | Central Philippines | |
| PANI, RANU | Maar of SEMERU | Java | |
| PANIER, MT. | Shield volcano of NEWER VOLCANICS PROV | Australia | |
| PANJANG, KAPUNDAN | Crater of TALANG | Sumatra | |
| PANMURE BASIN | Tuff ring of AUCKLAND FIELD | New Zealand | |
| PANSO [PANSOL] | Cone of SAN PABLO VOLCANIC FIELD | Luzon | |
| PANSOL | Cone of SAN PABLO VOLCANIC FIELD | Luzon | |
| PANTANO SECCO | Maar of ALBAN HILLS | Italy | |
| PANTAR API | Synonym of SIRUNG | Lesser Sunda Islands | |
| PANTELLERIA | Shield volcano | Historical | Italy |
| PANTELLERIA BANK | Submarine vent of CAMPI FLEGREI MAR SICILIA | Italy | |
| PANTOJA, CERRO | Stratovolcano | Holocene | Central Chile & Argentina |
| PANUM | Dome of MONO CRATERS | USA (California) | |
| PAO DE ACUCAR | Dome of TRINDADE | Atlantic Ocean (central) | |
| PAOHA ISLAND | Cone of MONO LAKE VOLCANIC FIELD | USA (California) | |
| PAPA, GUNUNG | Cone of ARJUNO-WELIRANG | Java | |
| PAPAK, GUNUNG | Cone of SEMERU | Java | |
| PAPAK, GUNUNG | Cone of IJEN | Java | |
| PAPALLACTA | Thermal Feature of CHACANA | Ecuador | |
| PAPANDAJAN | Synonym of PAPANDAYAN | Java | |
| PAPANDAYAN | Stratovolcanoes | Historical | Java |
| PAPATELE | Dome of TUTUILA | Samoan & Wallis Islands | |
| PAPAYO | Lava dome | Holocene | México |
| PAPOOSE HILL | Cone of MEDICINE LAKE | USA (California) | |
| PARABAKTI, CIPANAS | Thermal Feature of PERBAKTI-GAGAK | Java | |
| PARABAKTI, KAWAH | Thermal Feature of PERBAKTI-GAGAK | Java | |
| PARABAKTI, TJIPANAS [CIPANAS PARABAKTI] | Thermal Feature of PERBAKTI-GAGAK | Java | |
| PARACHO, CERROS DE | Shield volcano of MICHOACAN-GUANAJUATO | México | |
| PARADA NORTE, CERRO LA | Cone of IPALA | Guatemala | |
| PARADA, CERRITO LA | Cone of IPALA | Guatemala | |
| PARADOR | Cinder cone of CHILLAN, NEVADOS DE | Central Chile & Argentina | |
| PARAMASAM | Thermal Feature of UNGARAN | Java | |
| PARAMO DE RUIZ | Synonym of RUIZ, NEVADO DEL | Colombia | |
| PARAMO DE TAJUMBINA | Synonym of DONA JUANA | Colombia | |
| PARANG | Cone of JOLO | Sulu Islands | |
| PARANGAN | Cone of JOLO | Sulu Islands | |
| PARAROA | Dome of OKATAINA | New Zealand | |
| PARASA [PARASO] | Thermal Feature of NONDA | Bougainville & Solomon Islands | |
| PARASO | Thermal Feature of NONDA | Bougainville & Solomon Islands | |
| PARATUN | Synonym of OSORNO | Southern Chile & Argentina | |
| PARAZIT | Cone of ALAID | Kuril Islands | |
| PAREDO [VOLCAO DO PAREDAO] | Cone of TRINDADE | Atlantic Ocean (central) | |
| PAREHE, MAUNGA | Dome of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| PAREWHAITI | Dome of OKATAINA | New Zealand | |
| PARICUTIN | Cinder cone of MICHOACAN-GUANAJUATO | México | |
| PARINACOTA | Stratovolcano | Surface Exposure | Northern Chile, Bolivia & Argentina |
| PARIO, CERRO DE | Cinder cone of MICHOACAN-GUANAJUATO | México | |
| PARIOU, PUY DE | Cone of CHAINE DES PUYS | Western Europe | |
| PARISH HILL | Dome of SABA | West Indies | |
| PARKER | Stratovolcano | Historical | Mindanao |
| PARMALOK | Tuff cone of OL KOKWE | Africa (eastern) | |
| PARTIDO, PICO | Cone of LANZAROTE | Canary Islands | |
| PARTOV COVE | Thermal Feature of RECHESCHNOI | Aleutian Islands | |
| PARU, MT. | Cone of GALLEGO | Bougainville & Solomon Islands | |
| PARUGPUG | Crater of PAPANDAYAN | Java | |
| PARUMA, CERRO | Stratovolcano of OLCA-PARUMA | Northern Chile, Bolivia & Argentina | |
| PARUMA, VOLCAN | Stratovolcano of OLCA-PARUMA | Northern Chile, Bolivia & Argentina | |
| PARUPUJAN [PARUPUYAN] | Crater of GUNTUR | Java | |
| PARUPUYAN | Crater of GUNTUR | Java | |
| PARUSNAYA MOUNTAIN | Cone of GOLETS-TORNYI GROUP | Kuril Islands | |
| PARVEDI, PITON | Cinder cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| PARYASHCHAYA DOLINA | Thermal Feature of BOLSHOI SEMIACHIK | Kamchatka Peninsula | |
| PARYASHCHYI GREBEN | Dome of KSUDACH | Kamchatka Peninsula | |
| PARYASHCHYI UTES | Dome of KSUDACH | Kamchatka Peninsula | |
| PAS DES SABLES, PUY | Cinder cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| PASAMAN | Stratovolcano of TALAKMAU | Sumatra | |
| PASAR ARBAA | Stratovolcano of TALANG | Sumatra | |
| PASARBUBAR | Crater of MERAPI | Java | |
| PASCUA, ISLA DE | Synonym of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| PASIR BESAR | Crater of BANDA API | Banda Sea | |
| PASIRLEBAR, KAWAH [KAPI FUMAROLE FIELD] | Thermal Feature of KEMBAR | Sumatra | |
| PASQUI, CERRO | Cinder cone of IRAZU | Costa Rica | |
| PASSAGE, CRATERE DU | Crater of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| PASSO DEL VENTO | Thermal Feature of PANTELLERIA | Italy | |
| PASTO, VOLCAN DE | Synonym of GALERAS | Colombia | |
| PASTORES, CERRO | Cinder cone of NAOLINCO VOLCANIC FIELD | México | |
| PASTORIA, CERRO LA | Crater of PINACATE | México | |
| PATA | Synonym of OSORNO | Southern Chile & Argentina | |
| PATAH | Unknown | Fumarolic | Sumatra |
| PATAHUILLE | Synonym of OSORNO | Southern Chile & Argentina | |
| PATAMBAN, CERRO | Cone of MICHOACAN-GUANAJUATO | México | |
| PATATES, MORNE | Dome of PLAT PAYS, MORNE | West Indies | |
| PATILO | Crater of KARKAR | Northeast of New Guinea | |
| PATITE, CUDDIE | Shield volcano of PANTELLERIA | Italy | |
| PATOC | Stratovolcano | Fumarolic | Luzon |
| PATOEHA | Synonym of PATUHA | Java | |
| PATOS, ISLAS DE LOS | Dome of ILOPANGO | El Salvador & Honduras | |
| PATRICIO, CERRO | Cone of SAN CRISTOBAL | Galápagos Islands | |
| PATUHA | Stratovolcano | Holocene | Java |
| PATUHA KALER | Crater of PATUHA | Java | |
| PATUKIO, MT. | Cone of SIMBO | Bougainville & Solomon Islands | |
| PATULUL | Synonym of ATITLAN | Guatemala | |
| PAUAHI | Pit crater of KILAUEA | Hawaiian Islands | |
| PAUGARANI | Synonym of CASIRI, NEVADOS | Perú | |
| PAUGNAT, PUY DE | Cone of CHAINE DES PUYS | Western Europe | |
| PAUK | Lava cone of KRASHENINNIKOV | Kamchatka Peninsula | |
| PAUKOHUREA | Thermal Feature of OKATAINA | New Zealand | |
| PAULET | Cinder cone | Holocene | Antarctica & South Sandwich Islands |
| PAULINA PEAK | Dome of NEWBERRY | USA (Oregon) | |
| PAULOWSKY | Synonym of PAVLOF | Alaska Peninsula | |
| PAUZHETKA | Pleistocene caldera of DIKY GREBEN | Kamchatka Peninsula | |
| PAVANT BUTTE | Tuff cone of BLACK ROCK DESERT | USA (Utah) | |
| PAVAS, CERRO LAS | Stratovolcano of ILOPANGO | El Salvador & Honduras | |
| PAVAS, LAS | Cinder cone of CINOTEPEQUE, CERRO | El Salvador & Honduras | |
| PAVIN | Maar of CHAINE DES PUYS | Western Europe | |
| PAVLOF | Stratovolcano | Historical | Alaska Peninsula |
| PAVLOF SISTER | Stratovolcano | Holocene | Alaska Peninsula |
| PAWAI | Pit crater of KILAUEA | Hawaiian Islands | |
| PAWENEN, GUNUNG | Cone of IJEN | Java | |
| PAWON | Cone of AGUNG | Lesser Sunda Islands | |
| PAXAPA, CERRO | Lava cone of CHIQUIMULA VOLCANIC FIELD | Guatemala | |
| PAXTE, CERRO EL | Cone of IPALA | Guatemala | |
| PAXTON SPRINGS | Cone of ZUNI-BANDERA | USA (New Mexico) | |
| PAYACHATA, NEVADOS DE | Synonym of PARINACOTA | Northern Chile, Bolivia & Argentina | |
| PAYALPAN | Shield volcano of BOLSHOI PAYALPAN | Kamchatka Peninsula | |
| PAYANG | Crater of BATUR | Lesser Sunda Islands | |
| PAYUN MATRU | Shield volcano | Holocene | Central Chile & Argentina |
| PAYUN, CERRO | Stratovolcano of PAYUN MATRU | Central Chile & Argentina | |
| PEAK HILL | Dome of SABA | West Indies | |
| PEBBLE CREEK HOT SPRING | Thermal Feature of MEAGER | Canada | |
| PECHAN | Cone of TIANSHAN VOLCANIC GROUP | China (western) | |
| PECHO, EL | Stratovolcano of IZTACCIHUATL | México | |
| PECUL | Synonym of PACAYA | Guatemala | |
| PECUL, VOLCAN | Synonym of SANTO TOMAS | Guatemala | |
| PEDERNAL, CERRO EL | Dome of PRIMAVERA, SIERRA LA | México | |
| PEDGREGAL | Stratovolcano of OROSI | Costa Rica | |
| PEDRE BARBA, MONTANA DE | Cone of LANZAROTE | Canary Islands | |
| PEDREGAL, CERRO EL | Cinder cone of MICHOACAN-GUANAJUATO | México | |
| PEDREGOSO, CERRO | Dome of CEBORUCO | México | |
| PEDRERA, CERRO LA | Dome of ALMOLONGA | Guatemala | |
| PEGGY'S WHIM | Thermal Feature of ST. CATHERINE | West Indies | |
| PEGUNUNGAN DIENG | Synonym of DIENG VOLCANIC COMPLEX | Java | |
| PEHUALTEPEC | Cinder cone of CHICHINAUTZIN | México | |
| PEINADO | Stratovolcano | Holocene | Northern Chile, Bolivia & Argentina |
| PEISHAN [PECHAN] | Cone of TIANSHAN VOLCANIC GROUP | China (western) | |
| PELADITO, EL | Crater of GALERAS | Colombia | |
| PELADO, CERRO | Pyroclastic Cone of NEGRA, SIERRA | Galápagos Islands | |
| PELADO, CERRO | Cone of MINCHINMAVIDA | Southern Chile & Argentina | |
| PELADO, VOLCAN | Shield volcano of CHICHINAUTZIN | México | |
| PELAGATOS, CERRO | Cone of CHICHINAUTZIN | México | |
| PELAT, PUY | Cone of CHAINE DES PUYS | Western Europe | |
| PELATO, MONTE [MONTE PILATO] | Cone of LIPARI | Italy | |
| PELE [FATOULEO-KAKOULO] | Stratovolcano of NORTH VATE | Vanuatu | |
| PELE, MONT [LE DJUNGO] | Cone of TOMBEL GRABEN | Africa (western) | |
| PELE, MONTAGNE | Synonym of PELEE | West Indies | |
| PELE, PUU O | Cone of HALEAKALA | Hawaiian Islands | |
| PELEE | Stratovolcano | Historical | West Indies |
| PELLADO | Stratovolcano of SAN PEDRO-PELLADO | Central Chile & Argentina | |
| PELMEN | Cinder cone of TOLBACHIK | Kamchatka Peninsula | |
| PELON, CERRO | Dome of VALLES CALDERA | USA (New Mexico) | |
| PELON, CERRO | Cinder cone of COMONDU-LA PURISIMA | México | |
| PELON, CERRO | Cinder cone of DURANGO VOLCANIC FIELD | México | |
| PELON, CERRO | Cinder cone of ZITACUARO-VALLE DE BRAVO | México | |
| PELON, CERRO | Cinder cone of ZITACUARO-VALLE DE BRAVO | México | |
| PELON, CERRO | Cinder cone of ZITACUARO-VALLE DE BRAVO | México | |
| PELON, CERRO | Cinder cone of MICHOACAN-GUANAJUATO | México | |
| PELON, CERRO | Stratovolcano of TECAPA | El Salvador & Honduras | |
| PELON, CERRO | Stratovolcano of PLATANAR | Costa Rica | |
| PELON, EL | Cinder cone of MASAYA | Nicaragua | |
| PELONA, LOMA LA | Caldera of SAN CRISTOBAL | Nicaragua | |
| PEMATANG BATA | Crater of SUOH | Sumatra | |
| PENA BLANCA | Cone of ZITACUARO-VALLE DE BRAVO | México | |
| PENA BLANCA [OJO DE AGUA DE LA VIRGEN] | Stratovolcano of APANECA RANGE | El Salvador & Honduras | |
| PENA BLANCA, CERRO | Dome of TECUAMBURRO | Guatemala | |
| PENANGGUNGAN | Stratovolcano | Holocene | Java |
| PENATAHAN HOT SPRING | Thermal Feature of BRATAN | Lesser Sunda Islands | |
| PENAVALLELS, ALTOS DE LOS | Cone of GRAN CANARIA | Canary Islands | |
| PENCELUT, KAWAH | Thermal Feature of KAMOJANG, KAWAH | Java | |
| PENDAN | Unknown | Holocene | Sumatra |
| PENDAPURAN, KABA [KABA VOGELSANG] | Crater of KABA | Sumatra | |
| PENDIL, GUNUNG | Cone of IJEN | Java | |
| PENGCHIAHSU | Stratovolcano | Pleistocene-Fumarolic | Taiwan |
| PENGUIN ISLAND | Stratovolcano | Lichenometry | Antarctica & South Sandwich Islands |
| PENJELUANG, KABA [KABA VOGELSANG] | Crater of KABA | Sumatra | |
| PENOETOEN | Synonym of ILIWERUNG | Lesser Sunda Islands | |
| PENON DE LOS BANOS | Cone of CHICHINAUTZIN | México | |
| PENON DEL MARQUES | Cone of CHICHINAUTZIN | México | |
| PENONES, CERRO LOS | Dome of CHACHANI, NEVADO | Perú | |
| PENTA PALUMMO | Cone of CAMPI FLEGREI | Italy | |
| PENTJELUT, KAWAH [KAWAH PENCELUT] | Thermal Feature of KAMOJANG, KAWAH | Java | |
| PENUNGGUL | Dome of TENGGER CALDERA | Java | |
| PENVILLE COLD SOUFRIERE | Thermal Feature of DIABLES, MORNE AUX | West Indies | |
| PENYELUANG, KABA [KABA VOGELSANG] | Crater of KABA | Sumatra | |
| PERBAKTI, GUNUNG | Stratovolcano of PERBAKTI-GAGAK | Java | |
| PERBAKTI-GAGAK | Stratovolcanoes | Historical | Java |
| PERBOEWATAN [PERBUWATAN] | Former crater of KRAKATAU | Krakatau | |
| PERBUWATAN | Former crater of KRAKATAU | Krakatau | |
| PERCHE'S MOUNTAIN | Dome of SOUFRIERE HILLS | West Indies | |
| PEREMYCHKA | Dome of BOLSHOI SEMIACHIK | Kamchatka Peninsula | |
| PEREMYCHKA | Dome of UDOKAN PLATEAU | Russia (southeastern) | |
| PERETOLCHIN | Cinder cone of OKA PLATEAU | Russia (southeastern) | |
| PEREVAL | Cinder cone of MEDVEZHIA | Kuril Islands | |
| PEREZA, CERRO LA | Cone of IXTEPEQUE | Guatemala | |
| PERFAIT, PITON | Crater of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| PERIKARTIN | Dome of ERCIYES DAGI | Turkey | |
| PERISTERIA | Shield volcano of SANTORINI | Greece | |
| PERLA, LA | Stratovolcano of TECUAMBURRO | Guatemala | |
| PEROL, EL | Crater of SANTA ANA | El Salvador & Honduras | |
| PEROLITOS, LOS | Synonym of SAN MIGUEL | El Salvador & Honduras | |
| PERPENDICULAR HEAD | Tuff cone of ANTIPODES ISLAND | Pacific Ocean (southern) | |
| PERTOLICHINA | Cinder cone of OKA PLATEAU | Russia (southeastern) | |
| PERURU | Cone of PAGAN | Izu, Volcano, & Mariana Islands | |
| PERUTARUBE-SAN | Synonym of BERUTARUBE | Kuril Islands | |
| PERVAYA | Cone of UZON | Kamchatka Peninsula | |
| PERVAYA | Cone of UZON | Kamchatka Peninsula | |
| PESCHANIE GORKY | Cinder cone of TOLBACHIK | Kamchatka Peninsula | |
| PESCHNAYA, SOPKA | Cinder cone of ZAVARITSKY | Kamchatka Peninsula | |
| PESHCHERNYI | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| PETACAS | Lava dome | Holocene? | Colombia |
| PETER HAFEN | Crater of GAROVE | New Britain | |
| PETER I ISLAND | Shield volcano | Holocene | Antarctica & South Sandwich Islands |
| PETER SIMMON'S HILL | Dome of SABA | West Indies | |
| PETEROA | Submarine vent of PLANCHON-PETEROA | Central Chile & Argentina | |
| PETIT BOTOUM | Cone of TOUSSIDE, TARSO | Africa (northern) | |
| PETIT CHEMINEE EXTERIEURE | Crater of KARTHALA | Indian Ocean (western) | |
| PETIT DADOI | Cone of TOUSSIDE, TARSO | Africa (northern) | |
| PETIT HASAN DAGI | Dome of HASAN DAGI | Turkey | |
| PETIT PITON | Dome of QUALIBOU | West Indies | |
| PETIT PUY DE DOME | Cone of CHAINE DES PUYS | Western Europe | |
| PETIT SARCOUI | Cone of CHAINE DES PUYS | Western Europe | |
| PETIT SUCHET [PUY DE L'AUMONE] | Dome of CHAINE DES PUYS | Western Europe | |
| PETIT TROU AU NATRON [DOON KIDIMI] | Crater of TOUSSIDE, TARSO | Africa (northern) | |
| PETREL CRATER | Maar of PENGUIN ISLAND | Antarctica & South Sandwich Islands | |
| PEUET SAGOEE | Synonym of PEUET SAGUE | Sumatra | |
| PEUET SAGUE | Complex volcano | Historical | Sumatra |
| PEULIK | Stratovolcano of UGASHIK-PEULIK | Alaska Peninsula | |
| PEUT SAGOE | Synonym of PEUET SAGUE | Sumatra | |
| PHANTOM CONE | Stratovolcano of CRATER LAKE | USA (Oregon) | |
| PHARAOH | Dome of EDZIZA | Canada | |
| PHLEGETHON | Vent of NISYROS | Greece | |
| PHLEGRAEAN FIELDS | Synonym of CAMPI FLEGREI | Italy | |
| PHLEGRAEAN FIELDS OF THE SICILY SEA | Synonym of CAMPI FLEGREI MAR SICILIA | Italy | |
| PHLEGRAEISHE FELDER | Synonym of CAMPI FLEGREI | Italy | |
| PHYRIPLAKA [FYRIPLAKA] | Tuff ring of MILOS | Greece | |
| PI-CHIA-SHAN [BIJIASHAN] | Cone of WUDALIANCHI | China (eastern) | |
| PIAN D'ERASMO | Cinder cone of ETNA | Italy | |
| PIANO DEL LAGO | Caldera of ETNA | Italy | |
| PIANO, CALDERA DEL | Caldera of VULCANO | Italy | |
| PIANO, CALDERA DEL | Caldera of ETNA | Italy | |
| PIC / PICA | See proper name (e.g. ETOILE, PIC DE L') | French / Portuguese for PEAK | |
| PICACHO | Cinder cone of SAN QUINTIN VOLCANIC FIELD | México | |
| PICACHO, CALDERA EL | Caldera of PILAS, LAS | Nicaragua | |
| PICACHO, CERRO | Dome of VALLES CALDERA | USA (New Mexico) | |
| PICACHO, CERRO EL | Shield volcano of MICHOACAN-GUANAJUATO | México | |
| PICACHO, EL | Stratovolcano of SAN SALVADOR | El Salvador & Honduras | |
| PICACHO, EL | Stratovolcano of PILAS, LAS | Nicaragua | |
| PICADA, LA | Stratovolcano of OSORNO | Southern Chile & Argentina | |
| PICHANCHA, LA | Cinder cone of CEBORUCO | México | |
| PICHARES | Cone of CABURGUA-HUELEMOLLE | Central Chile & Argentina | |
| PICHELIN | Dome of PLAT PAYS, MORNE | West Indies | |
| PICHI CAULLE | Cone of PUYEHUE-CORDON CAULLE | Central Chile & Argentina | |
| PICHI LAGUNA | Maar of CAYUTUE-LA VIGUERIA | Southern Chile & Argentina | |
| PICHI, VOLCAN | Cinder cone of CARRAN-LOS VENADOS | Central Chile & Argentina | |
| PICHI-GOL, VOLCAN | Maar of PUYEHUE-CORDON CAULLE | Central Chile & Argentina | |
| PICHICHA, LAGUNA | Crater of ZAPATERA | Nicaragua | |
| PICHIHUA, CERRO | Cinder cone of ANDAHUA-ORCOPAMPA | Perú | |
| PICHIHUINCO, VOLCAN | Cinder cone of OSORNO | Southern Chile & Argentina | |
| PICHIMALLA | Crater of CALLAQUI | Central Chile & Argentina | |
| PICO | See proper name (e.g. CANARIA, PICO DE) | Portuguese and Spanish for PEAK | |
| PICO | Stratovolcano of ORIZABA, PICO DE | México | |
| PICO | Stratovolcano | Historical | Azores |
| PICO | Cone of FOGO | Cape Verde Islands | |
| PICO, PICO DO | Synonym of PICO | Azores | |
| PICOS VOLCANIC SYSTEM | Pyroclastic cones | Historical | Azores |
| PICUDO, CERRO | Cinder cone of CINOTEPEQUE, CERRO | El Salvador & Honduras | |
| PICUNG | Crater of GUNTUR | Java | |
| PIEDMONTE | Dome of ISCHIA | Italy | |
| PIEDRA DE AGUA, CERRO | Cone of CONCEPCION | Nicaragua | |
| PIEDRA DEL SAL, MONTANA | Cone of FUERTEVENTURA | Canary Islands | |
| PIEDRA HERRADA, CERRO | Dome of ZITACUARO-VALLE DE BRAVO | México | |
| PIEDRAS, CERRO LAS | Shield volcano of IXTEPEQUE | Guatemala | |
| PIERRE PRUVOST | Synonym of MA ALALTA | Africa (northeastern) & Red Sea | |
| PIES, EL | Stratovolcano of IZTACCIHUATL | México | |
| PIETRA, LA | Crater of CAMPI FLEGREI | Italy | |
| PIGEON MOUNTAIN | Cone of AUCKLAND FIELD | New Zealand | |
| PIGNA SAN NICOLA | Crater of CAMPI FLEGREI | Italy | |
| PIIP | Thermal Feature of AKADEMIA NAUK | Kamchatka Peninsula | |
| PIIP | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| PIIP | Submarine volcano | Tephrochronology | Kamchatka Peninsula |
| PIIPA | Synonym of PIIP | Kamchatka Peninsula | |
| PIK | Stratovolcano of KIKHPINYCH | Kamchatka Peninsula | |
| PIKESA | Dome of METHANA | Greece | |
| PILAR, LAGOA DO | Cone of SETE CIDADES | Azores | |
| PILAS, LAS | Synonym of NEGRO, CERRO | Nicaragua | |
| PILAS, LAS | Complex volcano | Historical | Nicaragua |
| PILAS, LAS | Dome of CONCEPCION | Nicaragua | |
| PILATO, MONTE | Cone of LIPARI | Italy | |
| PILATO, MT. | Cone of VULSINI | Italy | |
| PILI, CERRO | Synonym of ACAMARACHI | Northern Chile, Bolivia & Argentina | |
| PILIMBALA | Thermal Feature of PURACE | Colombia | |
| PILLAN | Synonym of OSORNO | Southern Chile & Argentina | |
| PILLAN [EL MOCHO] | Stratovolcano of MOCHO-CHOSHUENCO | Central Chile & Argentina | |
| PILLANILAHUE [CARRAN] | Maar of CARRAN-LOS VENADOS | Central Chile & Argentina | |
| PILLAR BUTTE | Shield volcano of WAPI LAVA FIELD | USA (Idaho) | |
| PILLOW CREEK | Cone of WELLS GRAY-CLEARWATER | Canada | |
| PILLOW RIDGE | Vent of EDZIZA | Canada | |
| PILMAIQUEN, CRATER | Cinder cone of MOCHO-CHOSHUENCO | Central Chile & Argentina | |
| PILON D'AZUCAR | Synonym of AUGUSTINE | Alaska (southwestern) | |
| PILON, CERRO | Dome of VALLE, EL | Panamá | |
| PILON, CERRO EL | Cone of ZAPATERA | Nicaragua | |
| PILON, EL [CERRO LOS NARANJOS] | Stratovolcano of APANECA RANGE | El Salvador & Honduras | |
| PILONCILLO | Dome of ZITACUARO-VALLE DE BRAVO | México | |
| PILONCILLO, CERRO EL | Cone of ZITACUARO-VALLE DE BRAVO | México | |
| PILONGO | Dome of ILLINIZA | Ecuador | |
| PILPIL BUTTE | Cone of NEWBERRY | USA (Oregon) | |
| PIMENTON | Crater of VILLARRICA | Central Chile & Argentina | |
| PIMOE | Cone of HALEAKALA | Hawaiian Islands | |
| PINACATE | Cinder cones | Holocene | México |
| PINACATE PEAK | Cone of PINACATE | México | |
| PINACATE PEAKS | Synonym of PINACATE | México | |
| PINAGDALAN | Thermal Feature of SAN PABLO VOLCANIC FIELD | Luzon | |
| PINAL DE MARQUEZADA | Dome of ZITACUARO-VALLE DE BRAVO | México | |
| PINAR DE LA VENTA | Dome of PRIMAVERA, SIERRA LA | México | |
| PINATUBO | Stratovolcano | Historical | Luzon |
| PINCHULEU, CERRO | Cinder cone of CRATER BASALT VOLCANIC FIELD | Southern Chile & Argentina | |
| PINE BUTTE | Cinder cone of DAVIS LAKE | USA (Oregon) | |
| PINGGANG | Cone of IYANG-ARGAPURA | Java | |
| PINGUIN BAY | Synonym of ST. PAUL | Indian Ocean (southern) | |
| PINITEDDU, MONTE | Cinder cone of ETNA | Italy | |
| PINNACLE PEAK | Dome of VALLES CALDERA | USA (New Mexico) | |
| PINNACLE RIDGE | Vent of RUAPEHU | New Zealand | |
| PINNACLE, THE | Vent of HOOD | USA (Oregon) | |
| PINNACLES | Vent of AUGUSTINE | Alaska (southwestern) | |
| PINNE | Submarine vent of CAMPI FLEGREI MAR SICILIA | Italy | |
| PINNE MARINE [PINNE] | Submarine vent of CAMPI FLEGREI MAR SICILIA | Italy | |
| PINO REDONDO, CERRO | Dome of IXTEPEQUE | Guatemala | |
| PINO, CERRITO EL | Cinder cone of CUILAPA-BARBARENA | Guatemala | |
| PINOONAN | Cone of NATIB | Luzon | |
| PINOS DE GALDAR, CALDERA DE LOS | Maar of GRAN CANARIA | Canary Islands | |
| PINTA | Shield volcano | Historical | Galápagos Islands |
| PINTA, EL | Crater of GALERAS | Colombia | |
| PINTO, CERRO | Dome of SERDAN-ORIENTAL | México | |
| PINTO, MT. | Twin volcano of SIBAYAK | Sumatra | |
| PINTOS, CERRO LOS | Cone of IPALA | Guatemala | |
| PINTU KECIL | Crater of BANDA API | Banda Sea | |
| PIOA | Dome of TUTUILA | Samoan & Wallis Islands | |
| PIOAO | Cone of TUTUILA | Samoan & Wallis Islands | |
| PIPE ORGAN VENT | Thermal Feature of CLEFT SEGMENT | Pacific Ocean (northern) | |
| PIPE, MT. [SURIBACHI-YAMA] | Cinder cone of IOTO [IWO-JIMA] | Izu, Volcano, & Mariana Islands | |
| PIPON, CERRO | Pyroclastic Cone of NEGRA, SIERRA | Galápagos Islands | |
| PIRANA, ALTO LA | Dome of RUIZ, NEVADO DEL | Colombia | |
| PIRATKOVSKY | Stratovolcano | Holocene | Kamchatka Peninsula |
| PIRE (PIREPILLAN) | Synonym of OSORNO | Southern Chile & Argentina | |
| PIRIA | Thermal Feature of NISYROS | Greece | |
| PIRIGALLO | Pleistocene caldera of CHILLAN, NEVADOS DE | Central Chile & Argentina | |
| PIRIHUEICO | Stratovolcano of HUANQUIHUE GROUP | Central Chile & Argentina | |
| PIRO-PIRASO | Cone of TAAL | Luzon | |
| PISAMBILLA | Synonym of REVENTADOR | Ecuador | |
| PISANG | Dome of KELUT | Java | |
| PISANI | Crater of CAMPI FLEGREI | Italy | |
| PISE | Synonym of OSORNO | Southern Chile & Argentina | |
| PISGAH CRATER | Cinder cone of LAVIC LAKE | USA (California) | |
| PISGAH, MT. | Cone of NEWER VOLCANICS PROV | Australia | |
| PISTOL BUTTE | Cinder cone of BACHELOR | USA (Oregon) | |
| PITAL, LOMA | Cinder cone of PLATANAR | Costa Rica | |
| PITJUNG [PICUNG] | Crater of GUNTUR | Java | |
| PITOGO | Cone of JOLO | Sulu Islands | |
| PITON | See proper name (e.g. FOURNAISE, PITON DE LA) | French and Spanish for PEAK | |
| PITZANTZI | Dome of CHACHIMBIRO | Ecuador | |
| PIUQUENES | Cone of ANTILLANCA GROUP | Central Chile & Argentina | |
| PIYAKONG HILL | Dome of CAMIGUIN | Mindanao | |
| PIZARRO, CERRO | Dome of SERDAN-ORIENTAL | México | |
| PIZCUARO, CERRO | Dome of AZUFRES, LOS | México | |
| PIZZA SOPRA LA FOSSA | Tuff cone of STROMBOLI | Italy | |
| PIZZILLO, MONTE | Cinder cone of ETNA | Italy | |
| PIZZO | Crater of STROMBOLI | Italy | |
| PLAISANCE | Dome of QUALIBOU | West Indies | |
| PLAKES | Dome of MILOS | Greece | |
| PLAN DE LAS ARDILLAS | Dome of TACANA | México | |
| PLAN DEL HOYO | Crater of SANTA ANA | El Salvador & Honduras | |
| PLANCHA LADERA | Cone of IMBABURA | Ecuador | |
| PLANCHON | Caldera of PLANCHON-PETEROA | Central Chile & Argentina | |
| PLANCHON-PETEROA | Stratovolcanoes | Historical | Central Chile & Argentina |
| PLANILLAS, CERRO LAS | Vent of PRIMAVERA, SIERRA LA | México | |
| PLANTAT | Cinder cone of SAN JOSE | Central Chile & Argentina | |
| PLAT PAYS, MORNE | Stratovolcano | Radiocarbon | West Indies |
| PLAT PAYS, MORNE | Stratovolcano | Radiocarbon | West Indies |
| PLATA | Synonym of FERNANDINA | Galápagos Islands | |
| PLATANAR | Stratovolcanoes | Holocene | Costa Rica |
| PLATEAU DOME [KANAKANA] | Dome of OKATAINA | New Zealand | |
| PLAYA HERMOSA | Crater of IRAZU | Costa Rica | |
| PLAYON DE AHUACHAPAN | Thermal Feature of APANECA RANGE | El Salvador & Honduras | |
| PLAYON DE AHUACHAPAN | Thermal Feature of APANECA RANGE | El Salvador & Honduras | |
| PLAYON, EL | Cinder cone of SAN SALVADOR | El Salvador & Honduras | |
| PLAZA DE TORROS | Tuff ring of SAN LUIS, ISLA | México | |
| PLEIADES, THE | Stratovolcano | Potassium-Argon | Antarctica & South Sandwich Islands |
| PLEIONES, MOUNT | Stratovolcano of PLEIADES, THE | Antarctica & South Sandwich Islands | |
| PLINTH MOUNTAIN | Cone of MEAGER | Canada | |
| PLOSKAYA (PLOSKI) | Synonym of USHKOVSKY | Kamchatka Peninsula | |
| PLOSKAYA | Synonym of PLOSKY | Kamchatka Peninsula | |
| PLOSKAYA | Shield volcano of AZAS PLATEAU | Russia (southeastern) | |
| PLOSKII | Crater of VERNADSKII RIDGE | Kuril Islands | |
| PLOSKO-KRUGLEN'KY | Cone of BOLSHOI SEMIACHIK | Kamchatka Peninsula | |
| PLOSKY | Cone of OLKOVIY VOLCANIC GROUP | Kamchatka Peninsula | |
| PLOSKY | Stratovolcano of BOLSHOI SEMIACHIK | Kamchatka Peninsula | |
| PLOSKY | Synonym of USHKOVSKY | Kamchatka Peninsula | |
| PLOSKY | Shield volcano | Holocene? | Kamchatka Peninsula |
| PLOSKY | Shield volcano | Holocene? | Kamchatka Peninsula |
| PLOSKY TOLBACHIK | Shield volcano of TOLBACHIK | Kamchatka Peninsula | |
| PLOSKYE SOPKI | Synonym of USHKOVSKY | Kamchatka Peninsula | |
| PLOTINA | Dome of BEZYMIANNY | Kamchatka Peninsula | |
| PLOTSKII [PLOSKAYA] | Shield volcano of AZAS PLATEAU | Russia (southeastern) | |
| PLUPUH, KAWAH | Crater of ARJUNO-WELIRANG | Java | |
| POA | Crater of PALUWEH | Lesser Sunda Islands | |
| POAS | Stratovolcano | Historical | Costa Rica |
| POCDOL MOUNTAINS | Compound volcano | Fumarolic | Luzon |
| POCHETERO, CERRO | Dome of CEBORUCO | México | |
| POCHNOI | Shield volcano of SEMISOPOCHNOI | Aleutian Islands | |
| POCKET BASIN | Crater of YELLOWSTONE | USA (Wyoming) | |
| POCO DEDEHG | Cone of SANO, WAI | Lesser Sunda Islands | |
| POCO LEOK | Stratovolcano | Fumarolic | Lesser Sunda Islands |
| POCO RII | Stratovolcano of POCO LEOK | Lesser Sunda Islands | |
| POCOIHUEN | Cone of CAYUTUE-LA VIGUERIA | Southern Chile & Argentina | |
| POCURA, LAGUNA | Maar of CARRAN-LOS VENADOS | Central Chile & Argentina | |
| PODAKAN | Stratovolcano of AMBALATUNGAN GROUP | Luzon | |
| PODGORNY | Cone of TUNKIN DEPRESSION | Russia (southeastern) | |
| PODIOK, KAWAH [KAWAH PONDOK] | Thermal Feature of KAMOJANG, KAWAH | Java | |
| PODKOVA | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| PODUSHECHNY | Dome of GOLOVNIN | Kuril Islands | |
| POEI [PUI] | Cone of IYA | Lesser Sunda Islands | |
| POELASARI | Synonym of PULOSARI | Java | |
| POELOE WE | Synonym of PULAU WEH | Sumatra | |
| POENDAK, GUNUNG [GUNUNG PUNDAK] | Cone of ARJUNO-WELIRANG | Java | |
| POERAKNJA, BUKIT [BUKIT PURAKNJA] | Cone of BATUR | Lesser Sunda Islands | |
| POERUA | Cone of KAIKOHE-BAY OF ISLANDS | New Zealand | |
| POESOEK BOEKIT [PUSIKBUKIT] | Stratovolcano of TOBA | Sumatra | |
| POGGIO BIELLO | Dome of AMIATA | Italy | |
| POGGIO PINZI | Dome of AMIATA | Italy | |
| POGGIO PINZI | Dome of AMIATA | Italy | |
| POGGIO TRAUZZOLO | Dome of AMIATA | Italy | |
| POGPOG SPRING | Thermal Feature of APO | Mindanao | |
| POGRANYCHNY | Shield volcanoes | Holocene? | Kamchatka Peninsula |
| POGREBENNYI | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| POGROMNI | Stratovolcano of WESTDAHL | Aleutian Islands | |
| POGROMNI'S SISTER | Stratovolcano of WESTDAHL | Aleutian Islands | |
| POGRUMNI [POGROMNI] | Stratovolcano of WESTDAHL | Aleutian Islands | |
| POGRUMNOY [POGROMNI] | Stratovolcano of WESTDAHL | Aleutian Islands | |
| POHATUROA | Dome of MAROA | New Zealand | |
| POHATUROA | Dome of ROTORUA | New Zealand | |
| POHOLO, LUA | Pit crater of MAUNA LOA | Hawaiian Islands | |
| POIAUHTECATL [POJAUTECATL] | Synonym of ORIZABA, PICO DE | México | |
| POIKE | Shield volcano of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| POINT KADIN | Vent of MAKUSHIN | Aleutian Islands | |
| POINTED STICK | Cone of WELLS GRAY-CLEARWATER | Canada | |
| POKR BOGHOUTLU | Cone of ARAGATS | Caucasus, Georgia & Armenia | |
| POKURU | Dome of MAROA | New Zealand | |
| POLIAHU, PUU | Cone of MAUNA KEA | Hawaiian Islands | |
| POLIPOLI | Cone of HALEAKALA | Hawaiian Islands | |
| POLLOK | Synonym of MAKATURING | Mindanao | |
| POLLOK | Synonym of RAGANG | Mindanao | |
| POLLUX | Cone of SEAL NUNATAKS GROUP | Antarctica & South Sandwich Islands | |
| POLOVINA HILL | Cinder cone of ST. PAUL ISLAND | Alaska (western) | |
| POLOVINKA | Pleistocene caldera of AKADEMIA NAUK | Kamchatka Peninsula | |
| POLUKUPOL | Dome of BOLSHOI SEMIACHIK | Kamchatka Peninsula | |
| POLVADERA PEAK | Dome of VALLES CALDERA | USA (New Mexico) | |
| POLYBOTES | Vent of NISYROS | Greece | |
| POLYBOTES MICROS [POLYVOTIS MICROS] | Vent of NISYROS | Greece | |
| POLYEGOS | Cone of MILOS | Greece | |
| POLYTOP BUTTE | Cone of NEWBERRY | USA (Oregon) | |
| POLYVOTIS MEGALOS | Vent of NISYROS | Greece | |
| POLYVOTIS MICROS | Vent of NISYROS | Greece | |
| POMA, ISLA | Tuff ring of SAN LUIS, ISLA | México | |
| POMARE | Stratovolcano of EPI | Vanuatu | |
| POMERAPE | Stratovolcano of PARINACOTA | Northern Chile, Bolivia & Argentina | |
| POMICIARI, MONTE | Cinder cone of ETNA | Italy | |
| PONAFIDIN | Synonym of TORI-SHIMA | Izu, Volcano, & Mariana Islands | |
| POND, MT. | Cone of ST. CATHERINE | West Indies | |
| PONDOK, KAWAH | Thermal Feature of KAMOJANG, KAWAH | Java | |
| PONDONA, LOMA | Dome of PULULAGUA | Ecuador | |
| PONMACHINESHIRI | Crater of AKAN | Hokkaido | |
| PONMATINESIRI [PONMACHINESHIRI] | Crater of AKAN | Hokkaido | |
| PONOHOHOA CHASMS | Shield volcano of KILAUEA | Hawaiian Islands | |
| POPA | Stratovolcano | Anthropology | Southeast Asia |
| POPKOV | Stratovolcano of BOLSHOI SEMIACHIK | Kamchatka Peninsula | |
| POPLOVAYA | Vent of EBEKO | Kuril Islands | |
| POPOCATEPETL | Stratovolcanoes | Historical | México |
| POPOCATZIN [POPOCATEPEC] | Synonym of POPOCATEPETL | México | |
| POPOLOJO, MT. | Cone of GAMKONORA | Halmahera | |
| POPORI, MT. | Cone of GALLEGO | Bougainville & Solomon Islands | |
| PORA, MT. | Cone of TODOKO-RANU | Halmahera | |
| PORAK | Stratovolcano | Anthropology | Caucasus, Georgia & Armenia |
| PORCELANA | Cone of HUEQUI | Southern Chile & Argentina | |
| PORDON, MT. | Cone of NEWER VOLCANICS PROV | Australia | |
| POROTO RIDGE | Synonym of NGOZI | Africa (eastern) | |
| PORSEA | Caldera of TOBA | Sumatra | |
| PORT FOSTER | Caldera of DECEPTION ISLAND | Antarctica & South Sandwich Islands | |
| PORT RESOLUTION | Synonym of YASUR | Vanuatu | |
| PORTERILLOS | Dome of CHACANA | Ecuador | |
| PORTEZUELO, VOLCANES DEL | Cone of CHILLAN, NEVADOS DE | Central Chile & Argentina | |
| PORTO D'ISCHIA | Vent of ISCHIA | Italy | |
| PORTO MISENO | Crater of CAMPI FLEGREI | Italy | |
| PORTRILLA | Crater of GALERAS | Colombia | |
| PORTRILLO, LOS | Cone of TELICA | Nicaragua | |
| PORTRILLO, VOLCAN EL | Cone of MAULE, LAGUNA DEL | Central Chile & Argentina | |
| PORUNA, LA | Cone of SAN PEDRO | Northern Chile, Bolivia & Argentina | |
| PORUNITA, LA | Cone of OLLAGUE | Northern Chile, Bolivia & Argentina | |
| PORVENIR, CERRO | Stratovolcano of PLATANAR | Costa Rica | |
| PORVENIR, CERRO EL | Cinder cone of CUILAPA-BARBARENA | Guatemala | |
| POSINTEPE, CERRO | Cone of MOMBACHO | Nicaragua | |
| POSOS, CERROS DE LOS | Dome of VALLES CALDERA | USA (New Mexico) | |
| POSSESSION, ILE DE LA | Stratovolcano | Holocene | Indian Ocean (southern) |
| POSSGIO DELLA PESCINA | Dome of AMIATA | Italy | |
| POSTA LUBRANO | Dome of ISCHIA | Italy | |
| POT HILL [NORTH HILL] | Cinder cone of ST. PAUL ISLAND | Alaska (western) | |
| POTATO HILL | Cinder cone of ADAMS | USA (Washington) | |
| POTATO MOUTAIN [MORNE PATATES] | Dome of PLAT PAYS, MORNE | West Indies | |
| POTERYANNY | Cinder cone of TOLBACHIK | Kamchatka Peninsula | |
| POTHOLE BUTTE | Cone of CRATER LAKE | USA (Oregon) | |
| POTIO AIKE, LAGO | Maar of PALEI-AIKE VOLCANIC FIELD | Southern Chile & Argentina | |
| POTJO DEDEHG [POCO DEDEHG] | Cone of SANO, WAI | Lesser Sunda Islands | |
| POTJO LEOK [POTJOK LEOK] | Synonym of POCO LEOK | Lesser Sunda Islands | |
| POTREROS, LOS | Pleistocene caldera of HUMEROS, LOS | México | |
| POTRET, KAWAH | Crater of TELONG, BUR NI | Sumatra | |
| POTTA | Cone of JAN MAYEN | Atlantic Ocean (Jan Mayen) | |
| POUCHARET, PUY DE | Cone of CHAINE DES PUYS | Western Europe | |
| POVOACAO | Pleistocene caldera of FURNAS | Azores | |
| POVOROTNAIA SOPKA | Synonym of MUTNOVSKY | Kamchatka Peninsula | |
| POWDER HILL | Cone of MEDICINE LAKE | USA (California) | |
| POWELL | Dome of PLAT PAYS, MORNE | West Indies | |
| POWERS CALDERA | Caldera of KILAUEA | Hawaiian Islands | |
| POWOROTNAJA ASSATSCHA | Synonym of MUTNOVSKY | Kamchatka Peninsula | |
| POYAUHTECATL | Synonym of ORIZABA, PICO DE | México | |
| POZAS, CERRO LAS | Cone of IXTEPEQUE | Guatemala | |
| POZO, EL | Pit crater of SANTA ANA | El Salvador & Honduras | |
| POZO, EL | Crater of TROMEN | Central Chile & Argentina | |
| PRA-KARYMSKY | Stratovolcano of KARYMSKY | Kamchatka Peninsula | |
| PRA-VISOKAYA | Cinder cone of TOLBACHIK | Kamchatka Peninsula | |
| PRAHU | Stratovolcano of DIENG VOLCANIC COMPLEX | Java | |
| PRAMBANAN | Cone of DIENG VOLCANIC COMPLEX | Java | |
| PRAMBANAN | Cone of DIENG VOLCANIC COMPLEX | Java | |
| PRARAUQUE | Synonym of OSORNO | Southern Chile & Argentina | |
| PRATA PORCI | Maar of ALBAN HILLS | Italy | |
| PRAVAIA MUTNOVSKAIA SOPKA | Synonym of GORELY | Kamchatka Peninsula | |
| PRAVILNY | Dome of BEZYMIANNY | Kamchatka Peninsula | |
| PRAVYI LURBAN | Dome of UDOKAN PLATEAU | Russia (southeastern) | |
| PRAWAJA MUTNOWSKAJA | Synonym of GORELY | Kamchatka Peninsula | |
| PRECIOSA, LA | Maar of SERDAN-ORIENTAL | México | |
| PREDSKANZANNYI | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| PREDVIDENNOYE | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| PREITO, CERRO | Dome of TOLUCA, NEVADO DE | México | |
| PRESTAHNUKUR | Subglacial volcano | Radiocarbon | Iceland (southwestern) |
| PRETO, PICO | Dome of TRINDADE | Atlantic Ocean (central) | |
| PREVO PEAK | Stratovolcano | Historical | Kuril Islands |
| PREVOSTE | Synonym of PREVO PEAK | Kuril Islands | |
| PRIBREZHNYI | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| PRICE BAY | Cone of GARIBALDI LAKE | Canada | |
| PRICE ISLAND | Cone of MILBANKE SOUND GROUP | Canada | |
| PRICE, MOUNT | Stratovolcano of GARIBALDI LAKE | Canada | |
| PRIEMYSH | Stratovolcano of KHODUTKA | Kamchatka Peninsula | |
| PRIETO, CERRO | Lava dome | Holocene? | México |
| PRIETO, CERRO | Shield volcano of MICHOACAN-GUANAJUATO | México | |
| PRIFITIS ILIAS | Dome of NISYROS | Greece | |
| PRIMAVERA, SIERRA LA | Caldera | Pleistocene-Hot Springs | México |
| PRINCE EDWARD ISLAND | Shield volcano | Holocene | Indian Ocean (southern) |
| PRINCE ISLAND | Synonym of ZAVODOVSKI | Antarctica & South Sandwich Islands | |
| PRINCESS | Crater of WHITE ISLAND | New Zealand | |
| PRINCESS PEAK | Synonym of SNOWY MOUNTAIN | Alaska Peninsula | |
| PRIOZERNAYA | Shield volcano of AZAS PLATEAU | Russia (southeastern) | |
| PRIOZERNYI [PRIOZERNAYA] | Shield volcano of AZAS PLATEAU | Russia (southeastern) | |
| PRIYEMYSH [PRIEMYSH] | Stratovolcano of KHODUTKA | Kamchatka Peninsula | |
| PRIZRAK | Pleistocene caldera of KELL | Kamchatka Peninsula | |
| PROBLEMATICHNY | Cone of BOLSHOI SEMIACHIK | Kamchatka Peninsula | |
| PROFIT ELIAS [PROFITIS ILIAS] | Dome of NISYROS | Greece | |
| PROFITIS ILIAS | Pumice cone of MILOS | Greece | |
| PRONGOLL | Dome of TENGGER CALDERA | Java | |
| PROPUSHCHENNYI | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| PROSPECT CONE | Cinder cone of UINKARET FIELD | USA (Arizona) | |
| PROSPECT PEAK | Shield volcano of LASSEN VOLCANIC CENTER | USA (California) | |
| PROTECTOR SHOAL | Submarine volcano | Historical | Antarctica & South Sandwich Islands |
| PROVATAS | Thermal Feature of MILOS | Greece | |
| PROVIDENCIA, CERRO LA | Dome of AZUFRES, LOS | México | |
| PROVIDENCIA, CERRO LA | Cinder cone of CUILAPA-BARBARENA | Guatemala | |
| PROVIDENCIA, VOLCAN | Cinder cone of CARRAN-LOS VENADOS | Central Chile & Argentina | |
| PRYOR CLIFF | Cone of HUDSON MOUNTAINS | Antarctica & South Sandwich Islands | |
| PUAI, PUU | Cone of KILAUEA | Hawaiian Islands | |
| PUAIALUA | Pit crater of KILAUEA | Hawaiian Islands | |
| PUAS | Synonym of POAS | Costa Rica | |
| PUCANU | Synonym of VILLARRICA | Central Chile & Argentina | |
| PUCHULDIZA | Hydrothermal field | Pleistocene-Geysers | Northern Chile, Bolivia & Argentina |
| PUCHURA, VOLCAN | Cinder cone of CARRAN-LOS VENADOS | Central Chile & Argentina | |
| PUCON | Synonym of VILLARRICA | Central Chile & Argentina | |
| PUCU MAURAS, CERRO | Cinder cone of ANDAHUA-ORCOPAMPA | Perú | |
| PUE, LE | Cone of UPOLU | Samoan & Wallis Islands | |
| PUEBLITO, EL | Cinder cone of MICHOACAN-GUANAJUATO | México | |
| PUEBLO NUEVO | Cone of ZITACUARO-VALLE DE BRAVO | México | |
| PUEBLO VIEJO, CERRO DEL | Cinder cone of MICHOACAN-GUANAJUATO | México | |
| PUELAMARUM [MARUM] | Crater of AMBRYM | Vanuatu | |
| PUELLARO | Dome of MOJANDA | Ecuador | |
| PUERTA DE LA LAGUNA | Maar of SAN SALVADOR | El Salvador & Honduras | |
| PUERTA, LA | Dome of PRIMAVERA, SIERRA LA | México | |
| PUERTA, VOLCAN | Cinder cone of MASCOTA VOLCANIC FIELD | México | |
| PUERTO, CERRO DEL | Cinder cone of MICHOACAN-GUANAJUATO | México | |
| PUERTO, VOLCAN EL | Cinder cone of MASCOTA VOLCANIC FIELD | México | |
| PUERTO, VOLCAN EL | Cinder cone of MASCOTA VOLCANIC FIELD | México | |
| PUESTO CORTADERAS | Pyroclastic cone | Holocene | Central Chile & Argentina |
| PUET SAGU | Synonym of PEUET SAGUE | Sumatra | |
| PUHIMAU | Pit crater of KILAUEA | Hawaiian Islands | |
| PUHIPUHI | Dome of OKATAINA | New Zealand | |
| PUHUAHUEN | Synonym of OSORNO | Southern Chile & Argentina | |
| PUI | Cone of IYA | Lesser Sunda Islands | |
| PU'I, MAUNGA | Pyroclastic Cone of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| PUIA HOU [TE MARI] | Crater of TONGARIRO | New Zealand | |
| PUIG | See proper name (e.g. SUBIA, PUIG) | Spanish for HILL | |
| PUJAJAUCO (PUJAJEN) | Synonym of OSORNO | Southern Chile & Argentina | |
| PUJALOS, VOLCA | Cone of OLOT VOLCANIC FIELD | Western Europe | |
| PUKAKI | Tuff ring of AUCKLAND FIELD | New Zealand | |
| PUKEAHUA | Dome of MAROA | New Zealand | |
| PUKEITI | Cone of AUCKLAND FIELD | New Zealand | |
| PUKEKAHU | Dome of REPOROA | New Zealand | |
| PUKEKAIKIONE | Cone of TONGARIRO | New Zealand | |
| PUKEKAIKIORE | Dome of TAUPO | New Zealand | |
| PUKEKIWIRIKI | Tuff ring of AUCKLAND FIELD | New Zealand | |
| PUKEKOHU | Crater of RAOUL ISLAND | Kermadec Islands | |
| PUKEMOREMORE | Dome of MAROA | New Zealand | |
| PUKEONAKE | Cone of TONGARIRO | New Zealand | |
| PUKEONAKE | Cone of RUAPEHU | New Zealand | |
| PUKEPOTO | Cone of WHANGAREI | New Zealand | |
| PUKEPOTO | Dome of OKATAINA | New Zealand | |
| PUKEROA | Dome of ROTORUA | New Zealand | |
| PUKETARATA | Dome of MAROA | New Zealand | |
| PUKETUTU | Cone of KAIKOHE-BAY OF ISLANDS | New Zealand | |
| PUKETUTU ISLAND | Cone of AUCKLAND FIELD | New Zealand | |
| PUK'H'KOWITZ | Synonym of BAKER | USA (Washington) | |
| PUKOPUHI, MAUNGA | Pyroclastic Cone of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| PUKU NGAAHAAHA | Pyroclastic Cone of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| PULA | Thermal Feature of PINATUBO | Luzon | |
| PULALI [PARASO] | Thermal Feature of NONDA | Bougainville & Solomon Islands | |
| PULAR | Stratovolcanoes | Holocene? | Northern Chile, Bolivia & Argentina |
| PULASARI | Synonym of PULOSARI | Java | |
| PULAU WEH | Stratovolcano | Pleistocene-Fumarolic | Sumatra |
| PULE | Cone of SAVAI'I | Samoan & Wallis Islands | |
| PULEA | Cone of SAVAI'I | Samoan & Wallis Islands | |
| PULO | Synonym of TAAL | Luzon | |
| PULO WEH | Synonym of PULAU WEH | Sumatra | |
| PULOSARI | Stratovolcano | Holocene | Java |
| PULPITO, PUNTA | Lava dome | Pleistocene-Fumarolic | México |
| PULU BETAH | Synonym of TARA, BATU | Lesser Sunda Islands | |
| PULU KAMBING II (PULU KOMBA) | Synonym of TARA, BATU | Lesser Sunda Islands | |
| PULU WEH | Synonym of PULAU WEH | Sumatra | |
| PULULAGUA | Caldera | Radiocarbon | Ecuador |
| PULULAHUA | Synonym of PULULAGUA | Ecuador | |
| PULVERMAAR | Maar of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| PUMA RANGA, CERRO | Cinder cone of ANDAHUA-ORCOPAMPA | Perú | |
| PUMAS, LOS | Crater of OSORNO | Southern Chile & Argentina | |
| PUMICE DOME | Dome of ANIAKCHAK | Alaska Peninsula | |
| PUMICE PIT DOME | Dome of MONO CRATERS | USA (California) | |
| PUMICE STONE MOUNTAIN | Cone of MEDICINE LAKE | USA (California) | |
| PUMPKIN HILL | Cinder cone of UTILA ISLAND | El Salvador & Honduras | |
| PUNA | Cone of SAVAI'I | Samoan & Wallis Islands | |
| PUNATA | Synonym of GUALLATIRI | Northern Chile, Bolivia & Argentina | |
| PUNCARA [ANBURO] | Dome of CHACHIMBIRO | Ecuador | |
| PUNCHBOWL | Dome of MONO CRATERS | USA (California) | |
| PUNCHBOWL, THE | Crater of ST. CATHERINE | West Indies | |
| PUNDAK, GUNUNG | Cone of ARJUNO-WELIRANG | Java | |
| PUNDUTAN NORTH | Crater of LAWU | Java | |
| PUNDUTAN SOUTH | Crater of LAWU | Java | |
| PUNG | Crater of UMBOI | Northeast of New Guinea | |
| PUNTA CONIGLIARA | Thermal Feature of VULCANO | Italy | |
| PUNTA DE IACOPO | Submarine vent of LIPARI | Italy | |
| PUNTA DEL'ARCO | Vent of PANTELLERIA | Italy | |
| PUNTA DELLA CANNUCCIA | Cone of ISCHIA | Italy | |
| PUNTA GORDA | Cone of CONCEPCION | Nicaragua | |
| PUNTA IMPERATORE | Crater of ISCHIA | Italy | |
| PUNTA LA SCROFA | Cone of ISCHIA | Italy | |
| PUNTA LEVANTE | Thermal Feature of PANAREA | Italy | |
| PUNTA MARMOLITE | Dome of CAMPI FLEGREI | Italy | |
| PUNTA SERRA | Tuff ring of CAMPI FLEGREI | Italy | |
| PUNTA TOSCA | Dome of SOCORRO | México | |
| PUNTA TRACINO | Vent of PANTELLERIA | Italy | |
| PUNTA VINCENTE ROCA | Tuff cone of ECUADOR | Galápagos Islands | |
| PUNTA ZACATEPEQUE | Dome of ILOPANGO | El Salvador & Honduras | |
| PUNTAS NEGRAS, VOLCAN | Stratovolcano of CORDON DE PUNTAS NEGRAS | Northern Chile, Bolivia & Argentina | |
| PUNTEAGUDO, CERRO | Synonym of PUNTIAGUDO-CORDON CENIZOS | Central Chile & Argentina | |
| PUNTIAGUDO, CERRO | Cinder cone of SAN MARTIN | México | |
| PUNTIAGUDO-CORDON CENIZOS | Stratovolcano | Historical | Central Chile & Argentina |
| PUPANDJI | Pyroclastic Cone of GEUREUDONG | Sumatra | |
| PUPUKE, LAKE | Tuff ring of AUCKLAND FIELD | New Zealand | |
| PURACE | Stratovolcanoes | Historical | Colombia |
| PURAHILLA (PURAHUILLE) | Synonym of OSORNO | Southern Chile & Argentina | |
| PURAKKANGINAN | Crater of BATUR | Lesser Sunda Islands | |
| PURAKKAUHAN | Crater of BATUR | Lesser Sunda Islands | |
| PURAKNJA, BUKIT | Cone of BATUR | Lesser Sunda Islands | |
| PURARRAHUE | Synonym of OSORNO | Southern Chile & Argentina | |
| PURAU | Cone of KUWAE | Vanuatu | |
| PURCHAS HILL | Cone of AUCKLAND FIELD | New Zealand | |
| PUREORA | Dome of MAROA | New Zealand | |
| PURERUA | Cone of KAIKOHE-BAY OF ISLANDS | New Zealand | |
| PURICO COMPLEX | Pyroclastic shield | Holocene | Northern Chile, Bolivia & Argentina |
| PURKHOLAR | Cone of SNAEFELLSJOKULL | Iceland (western) | |
| PURPLE | Synonym of BLACK PEAK | Alaska Peninsula | |
| PURRUMBETE, LAKE | Maar of NEWER VOLCANICS PROV | Australia | |
| PUSUKBUKIT | Stratovolcano of TOBA | Sumatra | |
| PUTAHI | Dome of KAIKOHE-BAY OF ISLANDS | New Zealand | |
| PUTANA | Stratovolcano | Historical | Northern Chile, Bolivia & Argentina |
| PUTAS, CERRO | Dome of PURICO COMPLEX | Northern Chile, Bolivia & Argentina | |
| PUTIH, KAWAH | Crater of PATUHA | Java | |
| PUTING LUPA EAST | Thermal Feature of SAN PABLO VOLCANIC FIELD | Luzon | |
| PUTING LUPA SOUTHEAST | Thermal Feature of SAN PABLO VOLCANIC FIELD | Luzon | |
| PUTRE, NEVADOS DE | Stratovolcano of TAAPACA | Northern Chile, Bolivia & Argentina | |
| PUTRE, NEVADOS DE | Stratovolcano of TAAPACA | Northern Chile, Bolivia & Argentina | |
| PUTRI, GUNUNG | Cone of GUNTUR | Java | |
| PUTRI-EWERANDA, GUNUNG | Stratovolcano of TALAGABODAS | Java | |
| PUU | See proper name (e.g. HUALALAI, PUU) | Hawaiian for HILL | |
| PUULENA | Pit crater of KILAUEA | Hawaiian Islands | |
| PUY | See proper name (e.g. LASCHAMP, PUY DE) | French for HILL | |
| PUYEHUE-AGUAS CALIENTES HOT SPRINGS | Thermal Feature of ANTILLANCA GROUP | Central Chile & Argentina | |
| PUYEHUE-CORDON CAULLE | Stratovolcano | Historical | Central Chile & Argentina |
| PUYUGUAPI | Synonym of PUYUHUAPI | Southern Chile & Argentina | |
| PUYUHUAPI | Cinder cones | Holocene | Southern Chile & Argentina |
| PUYULEK | Synonym of UGASHIK-PEULIK | Alaska Peninsula | |
| PYRAMID | Dome of EDZIZA | Canada | |
| PYRAMID MOUNTAIN | Cone of WELLS GRAY-CLEARWATER | Canada | |
| PYRE PEAK | Cinder cone of SEGUAM | Aleutian Islands | |
| PYRO HILL | Maar of FISHER | Aleutian Islands | |
| QAL'EH HASAN ALI | Maars | Holocene? | Iran & Afghanistan |
| QENI, TELL | Cone of DRUZE, JABAL AD | Syria | |
| QIANGBAQIAN | Shield volcano of UNNAMED | China (western) | |
| QIDR, JABAL | Stratovolcano of KHAYBAR, HARRAT | Arabia | |
| QISHR, JABAL AL | Cinder cone of LUNAYYIR, HARRAT | Arabia | |
| QIXINGLING | Cone of LEIZHOU BANDAO | Southeast Asia | |
| QOL, JABAL | Crater of ARHAB, HARRA OF | Arabia | |
| QUALIBOU | Caldera | Historical | West Indies |
| QUANSHUIGOU | Cinder cone of KUNLUN VOLCANIC GROUP | China (western) | |
| QUATRE GUEULES | Crater of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| QUATRO HERMANOS, LOS | Tuff cone of NEGRA, SIERRA | Galápagos Islands | |
| QUEBRADA DEL AZUFRE GRANDE | Thermal Feature of ANTISANA | Ecuador | |
| QUEBRADA SECA | Caldera of BRAVO, CERRO | Colombia | |
| QUECHUCABI OF OVALLE | Synonym of MINCHINMAVIDA | Southern Chile & Argentina | |
| QUECHULAC | Maar of SERDAN-ORIENTAL | México | |
| QUEEN MARY | Cinder cone of TRISTAN DA CUNHA | Atlantic Ocean (southern) | |
| QUEEN'S PARK | Crater of ST. CATHERINE | West Indies | |
| QUEIMADO, CERRO | Dome of AGUA DE PAU | Azores | |
| QUELGUENCO | Stratovolcano of HUANQUIHUE GROUP | Central Chile & Argentina | |
| QUELLAIPE (QUELLAYPE) | Synonym of CALBUCO | Southern Chile & Argentina | |
| QUEMADA DE ORZOLA, LA | Crater of LANZAROTE | Canary Islands | |
| QUEMADA, MONTANA | Cone of FUERTEVENTURA | Canary Islands | |
| QUEMADA, MONTANA [CALDERA RAJADA] | Cinder cone of LANZAROTE | Canary Islands | |
| QUEMADA, MONTANA [TACANDE] | Cinder cone of LA PALMA | Canary Islands | |
| QUEMADAS, ISLAS | Dome of ILOPANGO | El Salvador & Honduras | |
| QUEMADAS, LAS CALDERAS | Crater of LANZAROTE | Canary Islands | |
| QUEMADAS, LOS | Thermal Feature of TENORIO | Costa Rica | |
| QUEMADO [RININAHUE] | Maar of CARRAN-LOS VENADOS | Central Chile & Argentina | |
| QUEMADO, CERRO | Dome of ALMOLONGA | Guatemala | |
| QUEMADO, CERRO | Cinder cone of SAN DIEGO | El Salvador & Honduras | |
| QUEMADO, CERRO | Synonym of TAMBO QUEMADO | Northern Chile, Bolivia & Argentina | |
| QUEMADO, VOLCAN DE EL | Crater of LANZAROTE | Canary Islands | |
| QUEMADOS, CERRO DE | Cinder cone of IRAZU | Costa Rica | |
| QUEMADOS, CERROS [ISLAS QUEMADAS] | Dome of ILOPANGO | El Salvador & Honduras | |
| QUEPIL, CERRO | Dome of CHICHINAUTZIN | México | |
| QUESADA | Cone of PLATANAR | Costa Rica | |
| QUESTRODUGUN | Synonym of SOLLIPULLI | Central Chile & Argentina | |
| QUETRODUGON | Synonym of SOLLIPULLI | Central Chile & Argentina | |
| QUETRUPE | Synonym of OSORNO | Southern Chile & Argentina | |
| QUETRUPILLAN | Stratovolcano | Historical | Central Chile & Argentina |
| QUETZALTENANGO, VOLCAN DE [C. QUEMADO] | Dome of ALMOLONGA | Guatemala | |
| QUEZALTEPEQUE | Volcanic field | Holocene | Guatemala |
| QUEZALTEPEQUE [BOQUERON, EL] | Stratovolcano of SAN SALVADOR | El Salvador & Honduras | |
| QUICK-SMAN-IK | Synonym of BAKER | USA (Washington) | |
| QUILATOA | Synonym of QUILOTOA | Ecuador | |
| QUILL, THE | Stratovolcano | Radiocarbon | West Indies |
| QUILLAICAHUE | Crater of CALLAQUI | Central Chile & Argentina | |
| QUILLAYES, CRATER LOS | Crater of AZUL, CERRO | Central Chile & Argentina | |
| QUILOTOA | Caldera | Radiocarbon | Ecuador |
| QUIMSACHATA | Lava dome | Radiocarbon | Perú |
| QUINCEO | Cone of MICHOACAN-GUANAJUATO | México | |
| QUINISTAQUILLAS | Synonym of HUAYNAPUTINA | Perú | |
| QUINQUILIL | Stratovolcano of QUETRUPILLAN | Central Chile & Argentina | |
| QUIROTOA | Synonym of QUILOTOA | Ecuador | |
| QUIRRASCO, VOLCAN | Cinder cone of CARRAN-LOS VENADOS | Central Chile & Argentina | |
| QUITRALPILLAN | Synonym of VILLARRICA | Central Chile & Argentina | |
| QUIZAPU | Crater of AZUL, CERRO | Central Chile & Argentina | |
| QUIZAPU | Crater of AZUL, CERRO | Central Chile & Argentina | |
| QUMMATAIN | Cone of YAR, JABAL | Arabia | |
| QUOIN ISLAND | Cone of HANISH | Africa (northeastern) & Red Sea | |
| QUOIN ISLAND | Cone of ZUBAIR, JEBEL | Africa (northeastern) & Red Sea | |
| QURAYN, JABAL | Cone of BIRK, HARRAT AL | Arabia | |
| RABALANAKAIA | Cone of RABAUL | New Britain | |
| RABATANA [RABALANAKAIA] | Cone of RABAUL | New Britain | |
| RABAUL | Pyroclastic shield | Historical | New Britain |
| RABBIT MOUNTAIN | Dome of VALLES CALDERA | USA (New Mexico) | |
| RABOT | Dome of QUALIBOU | West Indies | |
| RACO, VOLCA | Cone of OLOT VOLCANIC FIELD | Western Europe | |
| RADERSBERG | Cone of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| RADJABASA (RADJOBASO) | Synonym of RAJABASA | Sumatra | |
| RADKEVICH | Crater of TIATIA | Kuril Islands | |
| RAGANG | Stratovolcano | Historical | Mindanao |
| RAGGED JACK | Synonym of ISANOTSKI | Aleutian Islands | |
| RAGGED TOP | Cone of SEMISOPOCHNOI | Aleutian Islands | |
| RAGTOWN CRATERS | Synonym of SODA LAKES | USA (Nevada) | |
| RAGTOWN PONDS | Synonym of SODA LAKES | USA (Nevada) | |
| RAHA, HARRAT ER- | Synonym of RAHAH, HARRAT AR | Arabia | |
| RAHA, HARRAT ER- | Synonym of RAHAT, HARRAT | Arabia | |
| RAHAH, HARRAT AR | Volcanic field | Anthropology | Arabia |
| RAHAT, HARRAT | Volcanic field | Historical | Arabia |
| RAHOUM [DALAHUM] | Cone of AMBRYM | Vanuatu | |
| RAHTAWU | Dome of MURIA | Java | |
| RAIDEN | Cone of NISEKO | Hokkaido | |
| RAIHUEN | Crater of ANTILLANCA GROUP | Central Chile & Argentina | |
| RAIKOKE | Stratovolcano | Historical | Kuril Islands |
| RAIKOKETO (RAIKOKU) | Synonym of RAIKOKE | Kuril Islands | |
| RAINBOW MTN [MAUNGAKAKARAMEA] | Cone of OKATAINA | New Zealand | |
| RAINIER | Stratovolcano | Historical | USA (Washington) |
| RAIRAINDREKETI | Cone of TAVEUNI | Fiji Islands | |
| RAJABASA | Stratovolcano | Fumarolic | Sumatra |
| RAJADA, CALDERA | Cinder cone of LANZAROTE | Canary Islands | |
| RAJADA, MONTANA | Dome of TENERIFE | Canary Islands | |
| RAJADA, MONTANA [CALDERA RAJADA] | Cinder cone of LANZAROTE | Canary Islands | |
| RAJADERAS, VOLCAN | Stratovolcano of DESCABEZADO GRANDE | Central Chile & Argentina | |
| RAJOBASO | Synonym of RAJABASA | Sumatra | |
| RAKATA | Stratovolcano of KRAKATAU | Krakatau | |
| RAKER PEAK | Cone of LASSEN VOLCANIC CENTER | USA (California) | |
| RAKHOHKKO | Synonym of RAIKOKE | Kuril Islands | |
| RAKIHAN | Cone of BESAR | Sumatra | |
| RAKUTAK, GUNUNG | Stratovolcano of KAMOJANG, KAWAH | Java | |
| RALKOKESHIMA | Synonym of RAIKOKE | Kuril Islands | |
| RALUAN [VULCAN] | Pumice cone of RABAUL | New Britain | |
| RAMIREZ, CERRO | Cinder cone of SAN VICENTE | El Salvador & Honduras | |
| RAMIREZ, CERRO DE LOS [CERRO CERRON] | Dome of APASTEPEQUE FIELD | El Salvador & Honduras | |
| RANAKAH | Lava domes | Historical | Lesser Sunda Islands |
| RANAKAH, POCOK | Dome of RANAKAH | Lesser Sunda Islands | |
| RANAS, CERRO LAS | Stratovolcano of APANECA RANGE | El Salvador & Honduras | |
| RANAS, LAGUNA SECA DE LA | Crater of APANECA RANGE | El Salvador & Honduras | |
| RANAU | Caldera | Holocene? | Sumatra |
| RANCAGUA | Synonym of TINGUIRIRICA | Central Chile & Argentina | |
| RANCHERIA RIVER VOLC FIELD | Volcanic field of TUYA VOLCANIC FIELD | Canada | |
| RANCO | Synonym of PUYEHUE-CORDON CAULLE | Central Chile & Argentina | |
| RANDAZZO, CUDDIA | Cone of PANTELLERIA | Italy | |
| RANGATAUA LAKES | Maar of RUAPEHU | New Zealand | |
| RANGITAHUA | Crater of RAOUL ISLAND | Kermadec Islands | |
| RANGITOTO | Cone of AUCKLAND FIELD | New Zealand | |
| RANGITUKUA | Dome of TAUPO | New Zealand | |
| RANO AROI | Pyroclastic Cone of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| RANO AROI | Pyroclastic Cone of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| RANO KAU | Shield volcano of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| RANO KULO | Thermal Feature of TONDANO CALDERA | Sulawesi | |
| RANO RANDANG | Thermal Feature of TONDANO CALDERA | Sulawesi | |
| RANO RARAKU | Pyroclastic Cone of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| RANO SAPET | Thermal Feature of TONDANO CALDERA | Sulawesi | |
| RANOMAFANA | Thermal Feature of ANKARATRA FIELD | Indian Ocean (western) | |
| RANQUIL DEL SUR, VOLCAN | Pyroclastic Cone of COCHIQUITO VOLCANIC GROUP | Central Chile & Argentina | |
| RANQUIL, CRATER | Cinder cone of MOCHO-CHOSHUENCO | Central Chile & Argentina | |
| RANTE | Stratovolcano of IJEN | Java | |
| RANTOP, MT. | Cone of TRAITOR'S HEAD | Vanuatu | |
| RANU | Caldera of TODOKO-RANU | Halmahera | |
| RAOENG | Synonym of RAUNG | Java | |
| RAOUL ISLAND | Stratovolcano | Historical | Kermadec Islands |
| RAPA NUI | Synonym of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| RAPANUI | Dome of MAROA | New Zealand | |
| RAPOGI | Cone of HOMA MOUNTAIN | Africa (eastern) | |
| RASA, CALDEIRA | Crater of FLORES | Azores | |
| RASA, LAGOA | Pumice ring of SETE CIDADES | Azores | |
| RASBERRY HILLS | Dome of SOUFRIERE HILLS | West Indies | |
| RASCHLENENNY | Dome of BEZYMIANNY | Kamchatka Peninsula | |
| RASHID, HARRAT | Volcanic field of RAHAT, HARRAT | Arabia | |
| RASHOWA | Synonym of RASSHUA | Kuril Islands | |
| RASSHUA | Stratovolcano | Historical | Kuril Islands |
| RASSOSHINA | Shield volcano of TITILA | Kamchatka Peninsula | |
| RASUYACU [TISHIGCUCHI] | Dome of ILLINIZA | Ecuador | |
| RASYOVA | Synonym of RASSHUA | Kuril Islands | |
| RATAS, LAS | Cinder cone of CHICHINAUTZIN | México | |
| RATASCHENNY | Cinder cone of TOLBACHIK | Kamchatka Peninsula | |
| RATIENG | Cone of HOMA MOUNTAIN | Africa (eastern) | |
| RATU | Crater of GEDE | Java | |
| RATU, KAWAH | Thermal Feature of SALAK | Java | |
| RATU, KAWAH | Crater of TANGKUBANPARAHU | Java | |
| RAUDAHALSAR | Cone of LJOSUFJOLL | Iceland (western) | |
| RAUDAHRAUN | Fissure vent of EYJAFJOLL | Iceland (southern) | |
| RAUDAKULA | Cone of LJOSUFJOLL | Iceland (western) | |
| RAUDAKULA-HORGSHOLTSHRAUN | Cone of LJOSUFJOLL | Iceland (western) | |
| RAUDAKULA-SVELGARHRAUN | Cone of LJOSUFJOLL | Iceland (western) | |
| RAUDAKULAR | Cone of LYSUHOLL | Iceland (western) | |
| RAUDFOSSAFJÖLL | Tuya of TORFAJOKULL | Iceland (southern) | |
| RAUDFOSSAHRAUN | Crater Row of VATNAFJOLL | Iceland (southern) | |
| RAUDHALSAR | Cone of LJOSUFJOLL | Iceland (western) | |
| RAUDHOLAR | Cone of SNAEFELLSJOKULL | Iceland (western) | |
| RAUDHOLAR | Crater Row of REYKJANES | Iceland (southwestern) | |
| RAUDHOLAR | Crater of GRIMSNES | Iceland (southwestern) | |
| RAUDHOLAR | Fissure vent of GRIMSVOTN | Iceland (northeastern) | |
| RAUDHOLAR | Fissure vent of FREMRINAMUR | Iceland (northeastern) | |
| RAUDHOLL | Crater Row of GRIMSVOTN | Iceland (northeastern) | |
| RAUDHOLL-HAFNARFJORDUR | Crater Row of KRISUVIK | Iceland (southwestern) | |
| RAUDIBOTN | Crater of KATLA | Iceland (southern) | |
| RAUDIMELUR | Crater Row of KRISUVIK | Iceland (southwestern) | |
| RAUDKEMBINGUR | Fissure vent of HEKLA | Iceland (southern) | |
| RAUDKOLLAR | Fissure vent of HEKLA | Iceland (southern) | |
| RAUDOLDUHRAUN | Crater Row of VATNAFJOLL | Iceland (southern) | |
| RAUDOLDUR | Crater of HEKLA | Iceland (southern) | |
| RAUDUBJALLAR | Fissure vent of HEKLA | Iceland (southern) | |
| RAUDUBORGIR | Fissure vent of FREMRINAMUR | Iceland (northeastern) | |
| RAUDUHNUKAGIGIR | Crater Row of BRENNISTEINSFJOLL | Iceland (southwestern) | |
| RAUKOKE | Synonym of RAIKOKE | Kuril Islands | |
| RAUNG | Stratovolcano | Historical | Java |
| RAUSU | Stratovolcano | Radiocarbon | Hokkaido |
| RAUSU-DAKE | Synonym of RAUSU | Hokkaido | |
| RAUSU-DAKE | Synonym of MENDELEEV | Kuril Islands | |
| RAWON | Synonym of RAUNG | Java | |
| RAY MOUNTAIN | Fissure vent of WELLS GRAY-CLEARWATER | Canada | |
| RAYHUEN [RAIHUÉN] | Crater of ANTILLANCA GROUP | Central Chile & Argentina | |
| RAYKOKE | Synonym of RAIKOKE | Kuril Islands | |
| RAYMOND, PUYS | Cinder cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| RAZLATY | Dome of BEZYMIANNY | Kamchatka Peninsula | |
| RAZRUSHENNYI [RASCHLENENNY] | Dome of BEZYMIANNY | Kamchatka Peninsula | |
| RAZVAL, MOUNT | Cone of RASSHUA | Kuril Islands | |
| READING PEAK | Dome of LASSEN VOLCANIC CENTER | USA (California) | |
| REALENCO, EL [CERRO EL CERRITO] | Cinder cone of SAN SALVADOR | El Salvador & Honduras | |
| REAUMUR, MT. | Stratovolcano of LONG ISLAND | Northeast of New Guinea | |
| REBANADA, CALDERA DE | Cinder cone of FUERTEVENTURA | Canary Islands | |
| REBEKE, JEBEL | Tuff cone of HAYLAN, JABAL | Arabia | |
| REBUNSHIRI | Cone of GROZNY GROUP | Kuril Islands | |
| RECHERCHE, LA | Synonym of RAOUL ISLAND | Kermadec Islands | |
| RECHESCHNOI | Stratovolcano | Holocene | Aleutian Islands |
| RECK | Dome of SANTORINI | Greece | |
| RECLUS | Cinder cone | Historical | Southern Chile & Argentina |
| RED BOMB CRATER | Cinder cone of DIAMOND CRATERS | USA (Oregon) | |
| RED BUTTE | Cinder cone of ADAMS | USA (Washington) | |
| RED CAP MOUNTAIN | Cone of MEDICINE LAKE | USA (California) | |
| RED CINDER BUTTE | Cinder cone of CINNAMON BUTTE | USA (Oregon) | |
| RED CLIFF | Dome of NEVIS PEAK | West Indies | |
| RED CONE | Vent of CRATER LAKE | USA (Oregon) | |
| RED CONES | Cinder cone of MAMMOTH MOUNTAIN | USA (California) | |
| RED CONES | Cone of KILAUEA | Hawaiian Islands | |
| RED CRATER | Crater of TONGARIRO | New Zealand | |
| RED CRATER | Cinder cone of BACHELOR | USA (Oregon) | |
| RED HILL | Cone of MEDICINE LAKE | USA (California) | |
| RED HILL | Cone of HALEAKALA | Hawaiian Islands | |
| RED HILL | Cone of SANTA CRUZ | Galápagos Islands | |
| RED HILL [SOUTH FORK] | Cinder cone of GOLDEN TROUT CREEK | USA (California) | |
| RED ISLAND | Cone of HEARD | Indian Ocean (southern) | |
| RED MOUNTAIN | Shield volcano of INDIAN HEAVEN | USA (Washington) | |
| RED MOUNTAIN [MT. PRICE] | Stratovolcano of GARIBALDI LAKE | Canada | |
| RED MOUNTAIN [OL DOINYO ONYOKE] | Stratovolcano of SUSWA | Africa (eastern) | |
| RED MOUNTAIN-BIG LAVA BED | Synonym of INDIAN HEAVEN | USA (Washington) | |
| RED ROCK | Maar of NEWER VOLCANICS PROV | Australia | |
| RED ROCK HILL | Cone of TWIN BUTTES | USA (California) | |
| RED SHALE BUTTE | Cone of MEDICINE LAKE | USA (California) | |
| REDCLOUD | Vent of CRATER LAKE | USA (Oregon) | |
| REDEDONDA | Dome of ZITACUARO-VALLE DE BRAVO | México | |
| REDONDO DE LA CRUZ, CERRO | Cinder cone of BARVA | Costa Rica | |
| REDONDO PEAK | Dome of VALLES CALDERA | USA (New Mexico) | |
| REDONDO, CERRO | Cinder cone of CUILAPA-BARBARENA | Guatemala | |
| REDONDO, CERRO | Cinder cone of CHINGO | Guatemala | |
| REDONDO, VOLCAN | Cone of SOLLIPULLI | Central Chile & Argentina | |
| REDONDO, VOLCAN | Cone of CABURGUA-HUELEMOLLE | Central Chile & Argentina | |
| REDOUBT | Stratovolcano | Historical | Alaska (southwestern) |
| REGULO, RANU | Maar of SEMERU | Java | |
| REHAI | Thermal Feature of TENGCHONG | Southeast Asia | |
| REICHO-SEN | Thermal Feature of TSURUMI | Ryukyu Islands & Kyushu | |
| REINI | Stratovolcano of BILLY MITCHELL | Bougainville & Solomon Islands | |
| REJO TE KAVACHI | Synonym of KAVACHI | Bougainville & Solomon Islands | |
| RELIBUENTU | Synonym of HUEQUI | Southern Chile & Argentina | |
| RENATURA | Cinder cone of ETNA | Italy | |
| RENDALL, MT. | Cone of FOGO | Cape Verde Islands | |
| RENDIJA, CERRO | Cone of ZUNI-BANDERA | USA (New Mexico) | |
| RENEGADO, VOLCAN | Stratovolcano of CHILLAN, NEVADOS DE | Central Chile & Argentina | |
| RENIHUE | Synonym of MOCHO-CHOSHUENCO | Central Chile & Argentina | |
| RENON, EL | Cinder cone of MASAYA | Nicaragua | |
| REOKA | Thermal Feature of SAVO | Bougainville & Solomon Islands | |
| REPARO, CERRO EL | Cone of SUCHITAN | Guatemala | |
| REPAS, VOLCA | Cone of OLOT VOLCANIC FIELD | Western Europe | |
| REPOROA | Caldera | Tephrochronology | New Zealand |
| REREWHAKAAITU | Tuff cone of OKATAINA | New Zealand | |
| REREWHAKAAITU | Tuff cone of OKATAINA | New Zealand | |
| RESAGO | Cinder cone | Holocene | Central Chile & Argentina |
| RESCHUELOS, EL | Dome of VALLES CALDERA | USA (New Mexico) | |
| RESOLANA, CRATER LA | Crater of AZUL, CERRO | Central Chile & Argentina | |
| RESOURCES, MORNE LES | Dome of DIABLOTINS, MORNE | West Indies | |
| RESTINGA | Cinder cone of HIERRO | Canary Islands | |
| RETANA CALDERA | Caldera of SUCHITAN | Guatemala | |
| RETCHECHNOI | Synonym of RECHESCHNOI | Aleutian Islands | |
| RETES, CERRO | Cone of IRAZU | Costa Rica | |
| RETIRO, CERRO EL | Cinder cone of SANTA ANA | El Salvador & Honduras | |
| RETU, MAUNGA | Pyroclastic Cone of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| REUNION, VOLCAN DE LA | Synonym of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| REUSCH PIT | Crater of KILIMANJARO | Africa (eastern) | |
| REVENTADA, MONTAÑA | Cinder cone of TENERIFE | Canary Islands | |
| REVENTADOR | Stratovolcano | Historical | Ecuador |
| REVENTADOR, EL | Synonym of REVENTADOR | Ecuador | |
| REVILLAGIGEDO ISLAND | Synonym of BEHM CANAL-RUDYERD BAY | Alaska (eastern) | |
| REVIRE NGANGA | Synonym of NYIRAGONGO | Africa (central) | |
| REYDARVATNSHRAUN | Fissure vent of HEKLA | Iceland (southern) | |
| REYEHEICO, VOLCANES DE | Cinder cone of QUETRUPILLAN | Central Chile & Argentina | |
| REYKJAFELLSGIGIR | Crater Row of HENGILL | Iceland (southwestern) | |
| REYKJANES | Crater rows | Historical | Iceland (southwestern) |
| REYKJANESHRYGGUR | Submarine volcanoes | Historical | Iceland (southwestern) |
| REYNIFELLSHRAUN | Crater Row of VATNAFJOLL | Iceland (southern) | |
| RF CRATER | Former crater of WHITE ISLAND | New Zealand | |
| RHODODENDRON CONE | Cone of IMURUK LAKE | Alaska (western) | |
| RIANG KOTANG | Thermal Feature of ILIKEDEKA | Lesser Sunda Islands | |
| RIBIERA DOS TAMBORES | Thermal Feature of FURNAS | Azores | |
| RICCO, MONTI | Cinder cone of ETNA | Italy | |
| RICHARD-FOY, MT. | Cone of COCHONS, ILE AUX | Indian Ocean (southern) | |
| RICHMOND, MT. | Cone of AUCKLAND FIELD | New Zealand | |
| RICHTHOFEN [GALLOSEULO] | Stratovolcano of HARGY | New Britain | |
| RICO, CERRO DE MONTE | Cone of IPALA | Guatemala | |
| RIDGE | Cone of EDZIZA | Canada | |
| RIDGE DOME | Dome of OKATAINA | New Zealand | |
| RIDGE WALL | Cinder cone of ST. PAUL ISLAND | Alaska (western) | |
| RIDUBIDUBINA, LAKE | Cone of VICTORY | New Guinea & D'Entrecasteaux Islands | |
| RIMDO | Dome of HALLA | Korea | |
| RINATU, MONTE | Cinder cone of ETNA | Italy | |
| RINCON CHICO | Dome of ZITACUARO-VALLE DE BRAVO | México | |
| RINCON DE LA CERCA, EL | Cinder cone of HIERRO | Canary Islands | |
| RINCON DE LA VIEJA | Complex volcano | Historical | Costa Rica |
| RINCON DE PARANGUEO | Maar of MICHOACAN-GUANAJUATO | México | |
| RINCON, EL | Maar of MICHOACAN-GUANAJUATO | México | |
| RINCON, EL | Thermal Feature of AGUAJITO, EL | México | |
| RINCONADA CERRO BAYO | Cone of BAYO, CERRO | Northern Chile, Bolivia & Argentina | |
| RINDJANI | Synonym of RINJANI | Lesser Sunda Islands | |
| RINGGIT | Dome of TENGGER CALDERA | Java | |
| RINGGIT | Synonym of RAUNG | Java | |
| RINGGIT, GUNUNG | Stratovolcano of ARJUNO-WELIRANG | Java | |
| RINGGIT, GUNUNG | Cone of IJEN | Java | |
| RINGO BUTTE | Shield volcano of DAVIS LAKE | USA (Oregon) | |
| RINIHUE | Synonym of MOCHO-CHOSHUENCO | Central Chile & Argentina | |
| RININAHUE | Maar of CARRAN-LOS VENADOS | Central Chile & Argentina | |
| RINJANI | Stratovolcano | Historical | Lesser Sunda Islands |
| RIO COLORADO | Pleistocene caldera of SAN PEDRO-PELLADO | Central Chile & Argentina | |
| RIO CORBORE | Crater of ISCHIA | Italy | |
| RIO CUARTO, LAGUNA | Maar of POAS | Costa Rica | |
| RIO CURINHUAS | Synonym of AZUL, VOLCAN | Nicaragua | |
| RIO FRIO, VOLCAN | Synonym of ARENAL | Costa Rica | |
| RIO HONDO [LAGUNA RIO CUARTO] | Maar of POAS | Costa Rica | |
| RIO IBANEZ | Cinder cone of HUDSON, CERRO | Southern Chile & Argentina | |
| RIO MURTA | Pyroclastic cones | Holocene? | Southern Chile & Argentina |
| RIO SALADO | Dome of PRIMAVERA, SIERRA LA | México | |
| RIONE DELLE MOFETE [MOFETE] | Crater of CAMPI FLEGREI | Italy | |
| RIONE TERRA | Crater of CAMPI FLEGREI | Italy | |
| RISCO PLATEADO | Stratovolcano | Holocene? | Central Chile & Argentina |
| RISHIRI | Stratovolcano | Radiocarbon | Hokkaido |
| RISHIRI | Dome of KUTCHARO | Hokkaido | |
| RISIRI | Synonym of RISHIRI | Hokkaido | |
| RISIRI [RISHIRI] | Dome of KUTCHARO | Hokkaido | |
| RISO PATRON | Cinder cone of MAIPO | Central Chile & Argentina | |
| RITTER ISLAND | Stratovolcano | Historical | Northeast of New Guinea |
| RITTMANN, MONTE | Cinder cone of ETNA | Italy | |
| RIVEROLL, CERRO | Cinder cone of SAN QUINTIN VOLCANIC FIELD | México | |
| RJUPNADYNGJUR | Shield volcano of BRENNISTEINSFJOLL | Iceland (southwestern) | |
| ROA | Synonym of LATE | Tonga Islands | |
| ROBERT MEYER | Crater of CAMEROON | Africa (western) | |
| ROBERTS MOUNTAIN | Cone of NUNIVAK ISLAND | Alaska (western) | |
| ROBERTSON, MT. | Cone of AUCKLAND FIELD | New Zealand | |
| ROBERTSON'S HILL | Cone of NEWER VOLCANICS PROV | Australia | |
| ROBINSON CRUSOE | Shield volcanoes | Historical | Pacific Ocean (Chilean Islands) |
| ROBLEDO | Caldera | Holocene | Northern Chile, Bolivia & Argentina |
| ROCA CHALLENGER | Dome of BARCENA | México | |
| ROCA NEGRA, VOLCA | Cone of OLOT VOLCANIC FIELD | Western Europe | |
| ROCAMEL, CERRO | Cone of ZACATE GRANDE, ISLA | El Salvador & Honduras | |
| ROCARD | Submarine volcano | Seismicity | Pacific Ocean (central) |
| ROCAS TRINIDAD | Dome of BARCENA | México | |
| ROCCA CAPRA | Cinder cone of ETNA | Italy | |
| ROCCA DE PAPA | Cone of ALBAN HILLS | Italy | |
| ROCCHE ROSSE | Vent of LIPARI | Italy | |
| ROCHE'S BLUFF | Dome of SOUFRIERE HILLS | West Indies | |
| ROCHE'S MOUNTAIN [PERCHE'S MOUNTAIN] | Dome of SOUFRIERE HILLS | West Indies | |
| ROCK MESA | Dome of SOUTH SISTER | USA (Oregon) | |
| ROCKESKYLL-SW | Tuff ring of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| ROCKNE VOLCANO | Synonym of VAILULU'U | Samoan & Wallis Islands | |
| ROCKY ISLAND | Cone of HANISH | Africa (northeastern) & Red Sea | |
| RODDE, PUY DE LA | Cone of CHAINE DES PUYS | Western Europe | |
| RODEO, EL | Dome of CUMBRES, LAS | México | |
| RODEOPAMPA, LOMA | Dome of CHACHIMBIRO | Ecuador | |
| RODEOS, MONTANA | Cinder cone of LANZAROTE | Canary Islands | |
| RODILLAS | Stratovolcano of IZTACCIHUATL | México | |
| RODNEY, MT. | Dome of ST. CATHERINE | West Indies | |
| RODRIGUEZ | Cone of PALENA VOLCANIC GROUP | Southern Chile & Argentina | |
| ROEANG | Synonym of RUANG | Sangihe Islands | |
| ROEMENGAN | Synonym of MAHAWU | Sulawesi | |
| ROEWANG | Synonym of RUANG | Sangihe Islands | |
| ROFUBODI | Submarine vent of VESTMANNAEYJAR | Iceland (southern) | |
| ROGERS HEAD | Cone of HEARD | Indian Ocean (southern) | |
| ROISA | Fissure vent of STROMBOLI | Italy | |
| ROJA DE MAZO, CALDERA | Cinder cone of LANZAROTE | Canary Islands | |
| ROJA, CALDERILLA DE | Crater of FUERTEVENTURA | Canary Islands | |
| ROKA PIEK | Synonym of INIERIE | Lesser Sunda Islands | |
| ROKATENDA | Crater of PALUWEH | Lesser Sunda Islands | |
| ROKATINDA [ROKATENDA] | Crater of PALUWEH | Lesser Sunda Islands | |
| ROKKA PEAK | Synonym of INIERIE | Lesser Sunda Islands | |
| ROKKANNON-MI-IKE | Maar of KIRISHIMA | Ryukyu Islands & Kyushu | |
| ROLLES PEAK | Stratovolcano of MAROA | New Zealand | |
| ROLLIZOS | Cone of CAYUTUE-LA VIGUERIA | Southern Chile & Argentina | |
| ROMANI HILL | Dome of NYAMBENI HILLS | Africa (eastern) | |
| ROMANO | Crater of CAMPI FLEGREI | Italy | |
| ROMANOVKA | Stratovolcano | Holocene? | Kamchatka Peninsula |
| ROMBONGAN, GUNUNG | Dome of RINJANI | Lesser Sunda Islands | |
| ROMERAL | Stratovolcano | Radiocarbon | Colombia |
| ROMO, VOLCAN | Maar of PINACATE | México | |
| ROND, PITON | Cinder cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| RONDE, ILE DE | Vent of KICK 'EM JENNY | West Indies | |
| RONGO | Cone of HOMA MOUNTAIN | Africa (eastern) | |
| ROODJA [ROOJA] | Cone of IYA | Lesser Sunda Islands | |
| ROOJA | Cone of IYA | Lesser Sunda Islands | |
| ROOKE ISLAND | Synonym of UMBOI | Northeast of New Guinea | |
| ROOK'S BAY | Tuff cone of MARION ISLAND | Indian Ocean (southern) | |
| ROQUE DE INFIERNO | Cone of LANZAROTE | Canary Islands | |
| ROQUE GRANDE | Cinder cone of HIERRO | Canary Islands | |
| ROQUES BLANCOS | Dome of TENERIFE | Canary Islands | |
| ROQUILLO, MONTANA DEL [VOLCAN DE FASNIA] | Cinder cone of TENERIFE | Canary Islands | |
| ROSARIO, BANOS DEL | Thermal Feature of ALMOLONGA | Guatemala | |
| ROSARIO, CERRO DEL | Dome of ILOPANGO | El Salvador & Honduras | |
| ROSARIO, CERRO EL | Cinder cone of ZITACUARO-VALLE DE BRAVO | México | |
| ROSARITO VOLC FIELD, EL | Synonym of SAN BORJA VOLCANIC FIELD | México | |
| ROSAS, MONTANA DE LAS | Cinder cone of HIERRO | Canary Islands | |
| ROSE GARDEN | Thermal Feature of GALAPAGOS RIFT | Pacific Ocean (eastern) | |
| ROSEBUD | Thermal Feature of GALAPAGOS RIFT | Pacific Ocean (eastern) | |
| ROSKILL, MT. | Cone of AUCKLAND FIELD | New Zealand | |
| ROSS ROCKS | Tuff cone of PRINCE EDWARD ISLAND | Indian Ocean (southern) | |
| ROSS, MOUNT | Stratovolcano of KERGUELEN ISLANDS | Indian Ocean (southern) | |
| ROSSE, CUDDIE | Cone of PANTELLERIA | Italy | |
| ROSSO, MONTE | Cone of VULCANO | Italy | |
| ROSSO, MONTE | Cinder cone of ETNA | Italy | |
| ROSSO, MT. | Cone of VULSINI | Italy | |
| ROSTO DE CAO | Tuff cone of PICOS VOLCANIC SYSTEM | Azores | |
| ROTA | Stratovolcano | Holocene | Nicaragua |
| ROTARO | Dome of ISCHIA | Italy | |
| ROTOATUA, LAKE | Crater of OKATAINA | New Zealand | |
| ROTOEHU, LAKE [ROTOMA GEOTHERMAL FD] | Thermal Feature of OKATAINA | New Zealand | |
| ROTOITI | Pleistocene caldera of OKATAINA | New Zealand | |
| ROTOITI | Thermal Feature of ROTORUA | New Zealand | |
| ROTOKAKAHI | Dome of OKATAINA | New Zealand | |
| ROTOKAUA | Thermal Feature of MAROA | New Zealand | |
| ROTOKAWA [ROTOKAUA] | Thermal Feature of MAROA | New Zealand | |
| ROTOKAWA, LAKE | Thermal Feature of ROTORUA | New Zealand | |
| ROTOKAWAU, LAKE | Maar of OKATAINA | New Zealand | |
| ROTOKOHU | Dome of OKATAINA | New Zealand | |
| ROTOMA | Pleistocene caldera of OKATAINA | New Zealand | |
| ROTOMA GEOTHERMAL FIELD | Thermal Feature of OKATAINA | New Zealand | |
| ROTOMAHANA | Dome of OKATAINA | New Zealand | |
| ROTOMAHANA | Dome of OKATAINA | New Zealand | |
| ROTORUA | Vent of OKATAINA | New Zealand | |
| ROTORUA | Caldera | Pleistocene-Geysers | New Zealand |
| ROTORUA GEOTHERMAL FIELD | Thermal Feature of ROTORUA | New Zealand | |
| ROUGE, MORNE | Cone of COCHONS, ILE AUX | Indian Ocean (southern) | |
| ROUGE, MORNE | Cone of PLAT PAYS, MORNE | West Indies | |
| ROUGE, MORNE | Cone of PLAT PAYS, MORNE | West Indies | |
| ROUGE, PITON | Cinder cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| ROUND HEAD | Cone of KANAGA | Aleutian Islands | |
| ROUND HILL | Synonym of QUILL, THE | West Indies | |
| ROUND HILL | Dome of NEVIS PEAK | West Indies | |
| ROUND ISLAND | Cone of HANISH | Africa (northeastern) & Red Sea | |
| ROUND MOUNTAIN | Vent of GARIBALDI | Canada | |
| ROUND MOUNTAIN | Cone of CLEAR LAKE | USA (California) | |
| ROUNDHEAD, MT. | Cone of GALLEGO | Bougainville & Solomon Islands | |
| ROUNDTOP | Stratovolcano | Radiocarbon | Aleutian Islands |
| ROUNDTOP MOUNTAIN | Cone of CLEAR LAKE | USA (California) | |
| ROUNG | Synonym of RAUNG | Java | |
| ROUSE | Synonym of MENDELEEV | Kuril Islands | |
| ROWO, GUNUNG | Maar of MURIA | Java | |
| ROYAL SOCIETY RANGE | Cinder cones | Holocene? | Antarctica & South Sandwich Islands |
| ROYCE | Crater of WHITE ISLAND | New Zealand | |
| ROYCE MOUNTAIN | Shield volcano of DAVIS LAKE | USA (Oregon) | |
| RUAGARE | Cone of KARISIMBI | Africa (central) | |
| RUAHINE SPRINGS | Thermal Feature of ROTORUA | New Zealand | |
| RUAMATA | Pumice cone of MAYOR ISLAND | New Zealand | |
| RUANG | Stratovolcano | Historical | Sangihe Islands |
| RUAPAHU | Synonym of RUAPEHU | New Zealand | |
| RUAPEHU | Stratovolcano | Historical | New Zealand |
| RUAWAHIA | Dome of OKATAINA | New Zealand | |
| RUBIO, CERRO | Dome of VALLES CALDERA | USA (New Mexico) | |
| RUBONA | Cone of NYIRAGONGO | Africa (central) | |
| RUBY | Submarine volcano | Historical | Izu, Volcano, & Mariana Islands |
| RUBY CREEK | Vent of ATLIN VOLCANIC FIELD | Canada | |
| RUBY MOUNTAIN | Cone of ATLIN VOLCANIC FIELD | Canada | |
| RUCKENBERG, MOUNT | Dome of SULU RANGE | New Britain | |
| RUCU PICHINCHA | Stratovolcano of GUAGUA PICHINCHA | Ecuador | |
| RUDAKOV | Stratovolcano | Holocene? | Kuril Islands |
| RUDERBUSCH | Cone of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| RUDICH'S CONE | Dome of UZON | Kamchatka Peninsula | |
| RUDOLF | Former crater of WHITE ISLAND | New Zealand | |
| RUEDAS, CERRO LAS | Cone of IPALA | Guatemala | |
| RUGARAMA | Cone of NYAMURAGIRA | Africa (central) | |
| RUGARAMBIRO | Cone of NYAMURAGIRA | Africa (central) | |
| RUGGED ISLAND | Cone of ZUBAIR, JEBEL | Africa (northeastern) & Red Sea | |
| RUHARA | Cone of KARISIMBI | Africa (central) | |
| RUIZ, NEVADO DEL | Stratovolcano | Historical | Colombia |
| RUK ISLAND | Synonym of UMBOI | Northeast of New Guinea | |
| RUKO | Synonym of EBEKO | Kuril Islands | |
| RUKONDJA | Cone of KARISIMBI | Africa (central) | |
| RUMBLE II WEST | Submarine volcano | Fumarolic | New Zealand |
| RUMBLE III | Submarine volcano | Hydrophonic | New Zealand |
| RUMBLE IV | Submarine volcano | Fumarolic | New Zealand |
| RUMBLE V | Submarine volcano | Fumarolic | New Zealand |
| RUMENGAN | Synonym of MAHAWU | Sulawesi | |
| RUMOKA | Cone of NYAMURAGIRA | Africa (central) | |
| RUNGU | Cone of KARISIMBI | Africa (central) | |
| RUNGWE | Stratovolcano | Holocene | Africa (eastern) |
| RUNU, WOLO | Crater of INIELIKA | Lesser Sunda Islands | |
| RURU, TAVANI | Stratovolcano of KUWAE | Vanuatu | |
| RURUI | Stratovolcano of SMIRNOV | Kuril Islands | |
| RUSA RAJA (RUSA RADJA) | Synonym of PALUWEH | Lesser Sunda Islands | |
| RUSCIELLO, MONTE | Crater of CAMPI FLEGREI | Italy | |
| RUSEKERE [KASEKERE] | Tuff cone of FORT PORTAL | Africa (central) | |
| RUSH HILL | Cinder cone of ST. PAUL ISLAND | Alaska (western) | |
| RUSHASHU | Cone of KARISIMBI | Africa (central) | |
| RUSHAYO | Cone of NYIRAGONGO | Africa (central) | |
| RUSSEL PEAK | Synonym of STURGE ISLAND | Antarctica & South Sandwich Islands | |
| RUTOKE | Cone of NYIRAGONGO | Africa (central) | |
| RUTUDAGI | Dome of SUPHAN DAGI | Turkey | |
| RUVIO, PICO | Cinder cone of MADEIRA | Azores | |
| RWAMISEGA | Cone of KARISIMBI | Africa (central) | |
| RWENKUBA | Tuff cone of FORT PORTAL | Africa (central) | |
| RYOSHI-DAKE | Cone of KUJU | Ryukyu Islands & Kyushu | |
| RYOUN-DAKE | Dome of DAISETSU | Hokkaido | |
| RYPONKICHA | Synonym of USHISHUR | Kuril Islands | |
| RYUZAN | Stratovolcano of ZAO | Honshu | |
| SAAR, KAWAH | Thermal Feature of KAMOJANG, KAWAH | Java | |
| SAAT, KAWAH | Thermal Feature of TALAGABODAS | Java | |
| SABA | Stratovolcano | Historical | West Indies |
| SABA ISLAND | Cone of ZUBAIR, JEBEL | Africa (northeastern) & Red Sea | |
| SABALAN | Stratovolcano | Holocene | Iran & Afghanistan |
| SABALE | Caldera of TIDORE | Halmahera | |
| SABANA REDONDA | Cone of POAS | Costa Rica | |
| SABANCAYA | Stratovolcanoes | Historical | Perú |
| SABANETAS, LAS [LAGUNA SECA] | Maar of PILAS, LAS | Nicaragua | |
| SABANGAN | Dome of APO | Mindanao | |
| SABINOSA | Cinder cone of HIERRO | Canary Islands | |
| SABOBER | Tuff ring of FENTALE | Africa (northeastern) & Red Sea | |
| SABOMA | Crater of BALUAN | Admiralty Islands | |
| SABRANA, LA [CERRO ALEGRIA] | Cone of TECAPA | El Salvador & Honduras | |
| SABU, OL DOINYO | Cone of NYAMBENI HILLS | Africa (eastern) | |
| SACABAYA | Synonym of TAMBO QUEMADO | Northern Chile, Bolivia & Argentina | |
| SACHIUSU-DAKE | Synonym of BARANSKY | Kuril Islands | |
| SADDLE | Thermal Feature of AMBITLE | New Ireland | |
| SADDLE HILL | Dome of NEVIS PEAK | West Indies | |
| SADDLE ISLAND | Cone of ZUBAIR, JEBEL | Africa (northeastern) & Red Sea | |
| SADDLE POINT | Cone of HEARD | Indian Ocean (southern) | |
| SAEFELL | Tuff cone of VESTMANNAEYJAR | Iceland (southern) | |
| SAEFELL | Tuff cone of VESTMANNAEYJAR | Iceland (southern) | |
| SAFONT, PUIG | Cone of OLOT VOLCANIC FIELD | Western Europe | |
| SAGA, WOLO | Crater of INIELIKA | Lesser Sunda Islands | |
| SAGAN | Cone of AZAS PLATEAU | Russia (southeastern) | |
| SAGUTA SWAMP [SUGUTA-LOGKIPI] | Thermal Feature of BARRIER, THE | Africa (eastern) | |
| SAHAND | Stratovolcano | Holocene | Iran & Afghanistan |
| SAHO BRANI | Crater of DUKONO | Halmahera | |
| SAHU | Cone of TODOKO-RANU | Halmahera | |
| SAING | Cone of IYANG-ARGAPURA | Java | |
| SAINOKAWARA HOT SPRINGS | Thermal Feature of KUSATSU-SHIRANE | Honshu | |
| SAINT-HIPPOLYTE, CRATERE DE | Maar of CHAINE DES PUYS | Western Europe | |
| SAIRECABUR | Stratovolcanoes | Holocene | Northern Chile, Bolivia & Argentina |
| SAJAKA | Stratovolcano of TANAGA | Aleutian Islands | |
| SAJAKA TWO | Cone of TANAGA | Aleutian Islands | |
| SAJIKI-YAMA | Cone of FUJI | Honshu | |
| SAKA | Tuff cone of FORT PORTAL | Africa (central) | |
| SAKAR | Stratovolcano | Holocene? | Northeast of New Guinea |
| SAKARAT, KAWAH | Thermal Feature of KAMOJANG, KAWAH | Java | |
| SAKUCHI | Caldera of SUWANOSE-JIMA | Ryukyu Islands & Kyushu | |
| SAKURA-JIMA | Stratovolcano | Historical | Ryukyu Islands & Kyushu |
| SAKURA-ZIMA | Synonym of SAKURA-JIMA | Ryukyu Islands & Kyushu | |
| SALAITA | Cone of KILIMANJARO | Africa (eastern) | |
| SALAK | Stratovolcano | Historical | Java |
| SALAL CREEK | Synonym of BRIDGE RIVER CONES | Canada | |
| SALAL GLACIER | Cone of BRIDGE RIVER CONES | Canada | |
| SALAL GLACIER | Cone of BRIDGE RIVER CONES | Canada | |
| SALAR DE ANTOFALLA | Volcanic field of ANTOFAGASTA DE LA SIERRA | Northern Chile, Bolivia & Argentina | |
| SALASI | Synonym of TALANG | Sumatra | |
| SALELELOGA | Cone of SAVAI'I | Samoan & Wallis Islands | |
| SALITRE DE CERRO, EL | Dome of ZITACUARO-VALLE DE BRAVO | México | |
| SALT LAKE | Thermal Feature of IAMALELE | New Guinea & D'Entrecasteaux Islands | |
| SALT LAKE | Crater of SANTIAGO | Galápagos Islands | |
| SALT POND PENINSULA | Dome of LIAMUIGA | West Indies | |
| SALTO DEL CORVO, MONTE | Cinder cone of ETNA | Italy | |
| SALTOS, MONTANA DE LOS | Cone of FUERTEVENTURA | Canary Islands | |
| SALTY DAWG | Thermal Feature of ENDEAVOUR RIDGE | Pacific Ocean (northern) | |
| SALVATIERRA | Synonym of SAN LUIS, ISLA | México | |
| SAMA | Crater of RUNGWE | Africa (eastern) | |
| SAMARA, MONTANA | Fissure vent of TENERIFE | Canary Islands | |
| SAMARGA PLATEAU [NELMA PLATEAU VOLC FIELD] | Fissure vent of SIKHOTE-ALIN | Russia (southeastern) | |
| SAMAT, MT. | Cone of MARIVELES | Luzon | |
| SAMAU | Cone of SAVAI'I | Samoan & Wallis Islands | |
| SAMBE | Synonym of SANBE | Honshu | |
| SAMBINONGKO | Dome of TENGGER CALDERA | Java | |
| SAMBU, OL DOINYO | Cone of CHYULU HILLS | Africa (eastern) | |
| SAMBU, OLDONYO | Cone of MERU | Africa (eastern) | |
| SAMLL BAGUIO | Dome of LABO | Luzon | |
| SAMPALOC LAKE | Maar of SAN PABLO VOLCANIC FIELD | Luzon | |
| SAMPALOC WARM SPRINGS | Thermal Feature of BANAHAW | Luzon | |
| SAMPEANWANI | Maar of BATUR | Lesser Sunda Islands | |
| SAMPU OLKUO | Cinder cone of SUSWA | Africa (eastern) | |
| SAN ALESSANDRO | Synonym of KITA-IWO-JIMA | Izu, Volcano, & Mariana Islands | |
| SAN ALFONSO | Dome of CHACHIMBIRO | Ecuador | |
| SAN ANDRES, CERRO DE | Dome of AZUFRES, LOS | México | |
| SAN ANDRES, MONTANA DE | Cone of FUERTEVENTURA | Canary Islands | |
| SAN ANDRES, SIERRA DE | Thermal Feature of MICHOACAN-GUANAJUATO | México | |
| SAN ANGELO, MONTE | Stratovolcano of LIPARI | Italy | |
| SAN ANTONIO | Thermal Feature of BILIRAN | Central Philippines | |
| SAN ANTONIO | Stratovolcano of TACANA | México | |
| SAN ANTONIO | Cinder cone of LA PALMA | Canary Islands | |
| SAN ANTONIO HOT SPRINGS | Thermal Feature of VALLES CALDERA | USA (New Mexico) | |
| SAN ANTONIO I, CERRO | Cinder cone of SANTIAGO, CERRO | Guatemala | |
| SAN ANTONIO MOUNTAIN | Dome of VALLES CALDERA | USA (New Mexico) | |
| SAN ANTONIO, CERRO | Shield volcano of MICHOACAN-GUANAJUATO | México | |
| SAN ANTONIO, CERRO | Cinder cone of GRANADA | Nicaragua | |
| SAN BARTOLO | Vent of STROMBOLI | Italy | |
| SAN BARTOLO | Dome of ZITACUARO-VALLE DE BRAVO | México | |
| SAN BARTOLO | Stratovolcano of MOJANDA | Ecuador | |
| SAN BARTOLO, CERRO | Cinder cone of CHINGO | Guatemala | |
| SAN BENEDICTO ISLAND | Synonym of BARCENA | México | |
| SAN BORJA VOLCANIC FIELD | Cinder cones | Holocene | México |
| SAN BRAS, LAGOA DE | Maar of AGUA DE PAU | Azores | |
| SAN CARLOS | Shield volcano | Holocene | Africa (western) |
| SAN CARLOS | Thermal Feature of APANECA RANGE | El Salvador & Honduras | |
| SAN CARLOS, CRATERES DE | Cinder cone of MOCHO-CHOSHUENCO | Central Chile & Argentina | |
| SAN CRISTOBAL | Stratovolcano of BANAHAW | Luzon | |
| SAN CRISTOBAL | Stratovolcano | Historical | Nicaragua |
| SAN CRISTOBAL | Shield volcano | Holocene | Galápagos Islands |
| SAN DIEGO | Volcanic field | Holocene | El Salvador & Honduras |
| SAN DIEGO SPRING | Thermal Feature of BANAHAW | Luzon | |
| SAN FELIX | Shield volcano | Holocene | Pacific Ocean (Chilean Islands) |
| SAN FERNANDO | Cone of ZAPATERA | Nicaragua | |
| SAN FERNANDO [MASAYA] | Crater of MASAYA | Nicaragua | |
| SAN FRANCISCO | Crater of ZITACUARO-VALLE DE BRAVO | México | |
| SAN FRANCISCO | Dome of TECUAMBURRO | Guatemala | |
| SAN FRANCISCO | Dome of ZAPATERA | Nicaragua | |
| SAN FRANSISCO | Synonym of MISTI, EL | Perú | |
| SAN GASPAR, CERRO | Cinder cone of IXTEPEQUE | Guatemala | |
| SAN GERONIMO | Maar of MICHOACAN-GUANAJUATO | México | |
| SAN GIACOMO | Crater of CAMPI FLEGREI | Italy | |
| SAN IGNACIO DEL BOSQUE, LOMAS [EL BOSQUE] | Dome of ROTA | Nicaragua | |
| SAN ILDEFONSO, CERRO | Cone of LAJAS, LAS | Nicaragua | |
| SAN ISIDRO | Cinder cone of COLIMA | México | |
| SAN ISIDRO, LOMA | Cone of SAN CRISTOBAL | Nicaragua | |
| SAN JACINTO [SANTA CLARA] | Stratovolcano of TELICA | Nicaragua | |
| SAN JACINTO, CERRO | Dome of ILOPANGO | El Salvador & Honduras | |
| SAN JACINTO, HERVIDEROS DE | Thermal Feature of TELICA | Nicaragua | |
| SAN JOAQUIN | Shield volcano | Holocene | Africa (western) |
| SAN JOAQUIN JARIPEO | Shield volcano of MICHOACAN-GUANAJUATO | México | |
| SAN JORGE | Dome of MOJANDA | Ecuador | |
| SAN JORGE | Fissure vent | Historical | Azores |
| SAN JORGE, CERRO DE | Cone of SAN DIEGO | El Salvador & Honduras | |
| SAN JOSE | Thermal Feature of CAGUA | Luzon | |
| SAN JOSE | Thermal Feature of APANECA RANGE | El Salvador & Honduras | |
| SAN JOSE | Stratovolcano | Historical | Central Chile & Argentina |
| SAN JOSE DE MAIPO | Synonym of SAN JOSE | Central Chile & Argentina | |
| SAN JUAN | Synonym of SANGANGUEY | México | |
| SAN JUAN | Crater of MASAYA | Nicaragua | |
| SAN JUAN | Fissure vent of LA PALMA | Canary Islands | |
| SAN JUAN CUECUELCO, CERRO | Cinder cone of GLORIA, LA | México | |
| SAN JUAN DE AMATITLAN | Synonym of PACAYA | Guatemala | |
| SAN JUAN, CERRO | Cinder cone of SANTIAGO, CERRO | Guatemala | |
| SAN JUAN, LOMA | Stratovolcano of COSIGUINA | Nicaragua | |
| SAN LAZARO, CERRO | Dome of APANECA RANGE | El Salvador & Honduras | |
| SAN LORENZO | Pit crater of APASTEPEQUE FIELD | El Salvador & Honduras | |
| SAN LUCAS | Cone of ZITACUARO-VALLE DE BRAVO | México | |
| SAN LUCAS | Synonym of TOLIMAN | Guatemala | |
| SAN LUCAS, LOMA | Cone of SAN CRISTOBAL | Nicaragua | |
| SAN LUIS ATEXCAC [LAGUNA ATEXCAC] | Maar of SERDAN-ORIENTAL | México | |
| SAN LUIS EL ALTO | Dome of ZITACUARO-VALLE DE BRAVO | México | |
| SAN LUIS, CERRO | Dome of VALLES CALDERA | USA (New Mexico) | |
| SAN LUIS, ISLA | Tuff cone | Holocene | México |
| SAN MARCELINO | Cinder cone of SANTA ANA | El Salvador & Honduras | |
| SAN MARTIN | Cinder cone of SAN QUINTIN VOLCANIC FIELD | México | |
| SAN MARTIN | Shield volcano | Historical | México |
| SAN MARTIN | Cinder cone of LA PALMA | Canary Islands | |
| SAN MARTIN TUXTLA | Synonym of SAN MARTIN | México | |
| SAN MARTINO | Crater of CAMPI FLEGREI | Italy | |
| SAN MARTINO | Crater of CAMPI FLEGREI | Italy | |
| SAN MARTINO, ISOLOTTO DI | Dome of CAMPI FLEGREI | Italy | |
| SAN MIGUEL | Stratovolcano | Historical | El Salvador & Honduras |
| SAN MIGUEL | Cinder cone of NEGRO, CERRO | Nicaragua | |
| SAN MIGUEL, CERRO | Vent of PRIMAVERA, SIERRA LA | México | |
| SAN NICOLA, MONTE | Cinder cone of ETNA | Italy | |
| SAN NICOLAS | Maar of MICHOACAN-GUANAJUATO | México | |
| SAN NICOLAS | Cone of CHICHINAUTZIN | México | |
| SAN PABLO | Twin volcano of SAN PEDRO | Northern Chile, Bolivia & Argentina | |
| SAN PABLO VOLCANIC FIELD | Stratovolcano | Anthropology | Luzon |
| SAN PEDRO | Crater of MASAYA | Nicaragua | |
| SAN PEDRO | Stratovolcanoes | Historical | Northern Chile, Bolivia & Argentina |
| SAN PEDRO | Stratovolcano of SAN PEDRO-PELLADO | Central Chile & Argentina | |
| SAN PEDRO, LAGUNA DE | Maar of SUCHITAN | Guatemala | |
| SAN PEDRO, LOMAS DE | Dome of ILOPANGO | El Salvador & Honduras | |
| SAN PEDRO-PELLADO | Stratovolcanoes | Holocene | Central Chile & Argentina |
| SAN PEDRO-TATARA | Synonym of SAN PEDRO-PELLADO | Central Chile & Argentina | |
| SAN QUINTIN VOLCANIC FIELD | Cinder cones | Holocene? | México |
| SAN RAFAEL | Caldera of TACANA | México | |
| SAN RAFAEL, CERRO | Cinder cone of MOYUTA | Guatemala | |
| SAN RAFAEL, CERRO | Cinder cone of ESTELI | Nicaragua | |
| SAN ROMAN, VOLCAN | Cinder cone of COPIAPO | Northern Chile, Bolivia & Argentina | |
| SAN ROQUE, CERRO | Dome of RINCON DE LA VIEJA | Costa Rica | |
| SAN SALVADOR | Stratovolcano | Historical | El Salvador & Honduras |
| SAN SALVADOR | Synonym of SANTIAGO | Galápagos Islands | |
| SAN SEBASTIAN, CERRO DE | Cinder cone of APASTEPEQUE FIELD | El Salvador & Honduras | |
| SAN VICENTE | Dome of LABO | Luzon | |
| SAN VICENTE | Stratovolcano | Holocene | El Salvador & Honduras |
| SAN VICENTE | Dome of RINCON DE LA VIEJA | Costa Rica | |
| SAN VICENTE SPRING | Thermal Feature of BANAHAW | Luzon | |
| SAN VICENTE, AUSOLES DE [AGUA AGRIA] | Thermal Feature of SAN VICENTE | El Salvador & Honduras | |
| SAN VITO | Vent of PANTELLERIA | Italy | |
| SANA'A VOLC FIELD | Synonym of ARHAB, HARRA OF | Arabia | |
| SANA'A-AMRAN VOLC FIELD | Synonym of ARHAB, HARRA OF | Arabia | |
| SANAGAY | Synonym of SANGAY | Ecuador | |
| SANAMBO, CERRO | Shield volcano of MICHOACAN-GUANAJUATO | México | |
| SANAROA ISLAND | Cone of DAWSON STRAIT GROUP | New Guinea & D'Entrecasteaux Islands | |
| SANBANGSAN | Dome of HALLA | Korea | |
| SANBE | Stratovolcano | Radiocarbon | Honshu |
| SANBONYARI | Stratovolcano of NASU | Honshu | |
| SAND BUTTE | Cone of NEWBERRY | USA (Oregon) | |
| SAND MOUNTAIN CONES | Cinder cone of SAND MOUNTAIN FIELD | USA (Oregon) | |
| SAND MOUNTAIN FIELD | Cinder cones | Radiocarbon | USA (Oregon) |
| SANDAWA | Synonym of APO | Mindanao | |
| SANDEY | Tuff cone of HENGILL | Iceland (southwestern) | |
| SANDFELL | Cone of SNAEFELLSJOKULL | Iceland (western) | |
| SANDFELLSGIGIR | Crater Row of HENGILL | Iceland (southwestern) | |
| SANDFELLSHAED | Shield volcano of REYKJANES | Iceland (southwestern) | |
| SANDFELLSKLOFAGIGIR | Crater Row of KRISUVIK | Iceland (southwestern) | |
| SANDSEA | Caldera of TENGGER CALDERA | Java | |
| SANDY POINT HILL | Dome of LIAMUIGA | West Indies | |
| SANFORD | Shield volcano | Holocene? | Alaska (eastern) |
| SANFORD, MT. | Cone of ATLIN VOLCANIC FIELD | Canada | |
| SANGAI | Synonym of SANGAY | Ecuador | |
| SANGANGUEY | Stratovolcano | Holocene | México |
| SANGAY | Stratovolcano | Historical | Ecuador |
| SANGEAN API | Synonym of SANGEANG API | Lesser Sunda Islands | |
| SANGEANG API | Complex volcano | Historical | Lesser Sunda Islands |
| SANGGA RUDANG, DOLOK | Dome of LUBUKRAYA | Sumatra | |
| SANGIANG BURUAN | Crater of GUNTUR | Java | |
| SANGIANG DJARIAN [SANGIANG JARIAN] | Crater of GUNTUR | Java | |
| SANGIANG JARIAN | Crater of GUNTUR | Java | |
| SANGIRAN | Crater of LAWU | Java | |
| SANGUIL (SANGUILI) | Synonym of BALUT | Mindanao | |
| SANGULA | Dome of SW USANGU BASIN | Africa (eastern) | |
| SANGUMBURI | Cone of HALLA | Korea | |
| SANJIANSHAN [BIJIASHAN] | Cone of WUDALIANCHI | China (eastern) | |
| SANJIAOLONGWAN | Maar of LONGGANG GROUP | China (eastern) | |
| SANKAKUTEN-YAMA [NOIKE] | Stratovolcano of KUCHINOERABU-JIMA | Ryukyu Islands & Kyushu | |
| SANNAK | Synonym of ISANOTSKI | Aleutian Islands | |
| SANNO-BOSHI | Dome of OMANAGO GROUP | Honshu | |
| SANNO-IKE | Crater of ON-TAKE | Honshu | |
| SANNOHARA-KITA | Cone of IZU-TOBU | Honshu | |
| SANNOMEGATA | Maar of MEGATA | Honshu | |
| SANO, WAI | Caldera | Holocene | Lesser Sunda Islands |
| SANPOKOJIN-SAN | Stratovolcano of ZAO | Honshu | |
| SANS NOM | Dome of PELEE | West Indies | |
| SANSHICHI-YAMA | Fissure vent of MIYAKE-JIMA | Izu, Volcano, & Mariana Islands | |
| SANSIQUISMUNDE [SAQUICISMUNDE] | Thermal Feature of PULPITO, PUNTA | México | |
| SANTA ANA | Synonym of AGUAJITO, EL | México | |
| SANTA ANA | Stratovolcano | Historical | El Salvador & Honduras |
| SANTA ANGELO | Dome of ISCHIA | Italy | |
| SANTA BARBARA | Dome of COTOPAXI | Ecuador | |
| SANTA BARBARA | Stratovolcano of TERCEIRA | Azores | |
| SANTA CATALINA, CALDERA DE | Crater of LANZAROTE | Canary Islands | |
| SANTA CATARINA MITA | Synonym of SUCHITAN | Guatemala | |
| SANTA CLARA | Volcanic field | Holocene? | USA (Utah) |
| SANTA CLARA | Shield volcano of PINACATE | México | |
| SANTA CLARA | Shield volcano of PINACATE | México | |
| SANTA CLARA | Stratovolcano of TELICA | Nicaragua | |
| SANTA CLARA [CASITA] | Stratovolcano of SAN CRISTOBAL | Nicaragua | |
| SANTA CLARA, CERRITO DE | Cinder cone of APASTEPEQUE FIELD | El Salvador & Honduras | |
| SANTA CRUZ | Shield volcano | Holocene | Galápagos Islands |
| SANTA ELENA | Cone of USULUTAN | El Salvador & Honduras | |
| SANTA ELENA, CERRITO DE | Cinder cone of CUILAPA-BARBARENA | Guatemala | |
| SANTA GERTRUDIS, VOLCAN | Cone of CHILLAN, NEVADOS DE | Central Chile & Argentina | |
| SANTA ISABEL | Shield volcano | Historical | Africa (western) |
| SANTA ISABEL | Shield volcano | Radiocarbon | Colombia |
| SANTA JULIA, SIERRA | Dome of ZAPATERA | Nicaragua | |
| SANTA LUCE | Cone of VULSINI | Italy | |
| SANTA MARGARIDA, VOLCA | Cone of OLOT VOLCANIC FIELD | Western Europe | |
| SANTA MARIA | Synonym of GAUA | Vanuatu | |
| SANTA MARIA | Stratovolcano | Historical | Guatemala |
| SANTA MARIA | Cone of RINCON DE LA VIEJA | Costa Rica | |
| SANTA MARIA | Stratovolcano of MIRAVALLES | Costa Rica | |
| SANTA MARIA | Cone of PAYUN MATRU | Central Chile & Argentina | |
| SANTA MARIA DI SALA | Cone of VULSINI | Italy | |
| SANTA MATILDE | Cinder cone of PILAS, LAS | Nicaragua | |
| SANTA MICHELE | Crater of ISCHIA | Italy | |
| SANTA PANCRAZIO | Dome of ISCHIA | Italy | |
| SANTA RITA, CERRO | Cinder cone of CINOTEPEQUE, CERRO | El Salvador & Honduras | |
| SANTA RITA, CERRO | Dome of APASTEPEQUE FIELD | El Salvador & Honduras | |
| SANTA RITA, MT. | Cone of NATIB | Luzon | |
| SANTA ROSA | Maar of MICHOACAN-GUANAJUATO | México | |
| SANTA ROSA | Cinder cone of ANDAHUA-ORCOPAMPA | Perú | |
| SANTA ROSA HILL | Cone of MARION ISLAND | Indian Ocean (southern) | |
| SANTA ROSA, CERRO | Dome of VALLES CALDERA | USA (New Mexico) | |
| SANTA ROSALINA | Thermal Feature of BILIRAN | Central Philippines | |
| SANTA TERESA | Cinder cone of MICHOACAN-GUANAJUATO | México | |
| SANTA TERESA, MONTE | Crater of CAMPI FLEGREI | Italy | |
| SANTA URSULA | Pit crater of APASTEPEQUE FIELD | El Salvador & Honduras | |
| SANTABARBARA MORTAL DE LA NATURALEZ | Synonym of IRAZU | Costa Rica | |
| SANT'ANGELO | Dome of ISCHIA | Italy | |
| SANT'ANGELO, MONTE | Cone of CAMPI FLEGREI | Italy | |
| SANTANO, ALTO DE | Dome of RUIZ, NEVADO DEL | Colombia | |
| SANT'ELMO, MONTE | Cone of PANTELLERIA | Italy | |
| SANTIAGO | Crater of MASAYA | Nicaragua | |
| SANTIAGO | Shield volcano | Historical | Galápagos Islands |
| SANTIAGO | Fissure vent of TENERIFE | Canary Islands | |
| SANTIAGO [SANTIAGUITO] | Dome of SANTA MARIA | Guatemala | |
| SANTIAGO DEL MONTE | Dome of ZITACUARO-VALLE DE BRAVO | México | |
| SANTIAGO VOLC FIELD, VALLE DE | Maar of MICHOACAN-GUANAJUATO | México | |
| SANTIAGO, CERRO | Volcanic field | Holocene | Guatemala |
| SANTIAGO, CERRO | Cinder cone of CINOTEPEQUE, CERRO | El Salvador & Honduras | |
| SANTIAGO, CERRO EL | Cone of CHICHINAUTZIN | México | |
| SANTIAGO, EL CERRO DE | Dome of CHICHINAUTZIN | México | |
| SANTIAGO, LAGOA DE | Pumice ring of SETE CIDADES | Azores | |
| SANTIAGUITO | Dome of SANTA MARIA | Guatemala | |
| SANTIDAD, MONTANA DE | Cone of GRAN CANARIA | Canary Islands | |
| SANTO DOMINGO, CERRO | Dome of GUAYAQUES | Northern Chile, Bolivia & Argentina | |
| SANTO TOMAS - ZUNIL | Synonym of SANTO TOMAS | Guatemala | |
| SANTO TOMAS | Stratovolcano | Uncertain | Luzon |
| SANTO TOMAS | Stratovolcanoes | Pleistocene-Fumarolic | Guatemala |
| SANTO TOMAS, VOLCAN | Synonym of NEGRA, SIERRA | Galápagos Islands | |
| SANTORINI | Shield volcanoes | Historical | Greece |
| SAO BONIFACIO, PICO | Dome of TRINDADE | Atlantic Ocean (central) | |
| SAO JORGE | Synonym of SAN JORGE | Azores | |
| SAO ROQUE PEIDADE | Fissure vent of PICO | Azores | |
| SAO THOME | Synonym of SAO TOME | Africa (western) | |
| SAO TIAGO, LAGOA DE [LAGOA SANTIAGO] | Pumice ring of SETE CIDADES | Azores | |
| SAO TOME | Shield volcano | Holocene? | Africa (western) |
| SAO VICENTE | Stratovolcano | Holocene | Cape Verde Islands |
| SAPICHU | Cinder cone of MICHOACAN-GUANAJUATO | México | |
| SAPIEN, CERRO | Cinder cone of MICHOACAN-GUANAJUATO | México | |
| SAP'O [BORA] | Pumice cone of BORA-BERICCIO | Africa (northeastern) & Red Sea | |
| SAQUICISMUNDE | Thermal Feature of PULPITO, PUNTA | México | |
| SARA SARA | Stratovolcano | Holocene | Perú |
| SARABWE | Cone of KIEYO | Africa (eastern) | |
| SARACENO, MONTE | Cone of VULCANO | Italy | |
| SARANGAN | Crater of LAWU | Java | |
| SARANGANI | Synonym of BALUT | Mindanao | |
| SARANGSONG | Thermal Feature of TONDANO CALDERA | Sulawesi | |
| SARI GOL | Crater of ERCIYES DAGI | Turkey | |
| SARIA | Synonym of AVACHINSKY | Kamchatka Peninsula | |
| SARICHEF | Stratovolcano of ATKA | Aleutian Islands | |
| SARIDAG | Cone of ERCIYES DAGI | Turkey | |
| SARIGAN | Stratovolcano | Holocene | Izu, Volcano, & Mariana Islands |
| SARIK-GAJAH | Pyroclastic cones | Holocene? | Sumatra |
| SARNICHEFF | Synonym of SARYCHEV PEAK | Kuril Islands | |
| SARNOSO | Stratovolcano of ANTILLANCA GROUP | Central Chile & Argentina | |
| SARSKRATERET | Cone of JAN MAYEN | Atlantic Ocean (Jan Mayen) | |
| SARTANIA | Crater of CAMPI FLEGREI | Italy | |
| SARUANA | Crater of CHOKAI | Honshu | |
| SARUHA-YAMA | Dome of UNZEN | Ryukyu Islands & Kyushu | |
| SARUKURA-YAMA | Stratovolcano of ZAO | Honshu | |
| SARUTSCHEW [SARICHEF] | Stratovolcano of ATKA | Aleutian Islands | |
| SARUTSCHEW-SERGIEF | Synonym of SERGIEF | Aleutian Islands | |
| SARYCHEV PEAK | Stratovolcano | Historical | Kuril Islands |
| SARYTCHEV [SARICHEF] | Stratovolcano of ATKA | Aleutian Islands | |
| SASHIUSU-DAKE | Synonym of BARANSKY | Kuril Islands | |
| SASO, VOLCAN | Cone of MAULE, LAGUNA DEL | Central Chile & Argentina | |
| SASQUATCH | Thermal Feature of ENDEAVOUR RIDGE | Pacific Ocean (northern) | |
| SASTRES, LAS | Cinder cone of MASAYA | Nicaragua | |
| SAT AGOMARA | Synonym of ERTA ALE | Africa (northeastern) & Red Sea | |
| SATAH MOUNTAIN | Volcanic field | Holocene | Canada |
| SATAK | Synonym of SALAK | Java | |
| SATSUMA-FUJI [KAIMON] | Stratovolcano of IBUSUKI VOLCANIC FIELD | Ryukyu Islands & Kyushu | |
| SATSUMA-IWO-JIMA | Synonym of KIKAI | Ryukyu Islands & Kyushu | |
| SATUMA-HUZI [KAIMON] | Stratovolcano of IBUSUKI VOLCANIC FIELD | Ryukyu Islands & Kyushu | |
| SAUCE, EL | Thermal Feature of APANECA RANGE | El Salvador & Honduras | |
| SAUCER, THE | Cone of EDZIZA | Canada | |
| SAUDA, HARRA ES- | Synonym of SAWAD, HARRA ES- | Arabia | |
| SA'UMANE | Cone of TA'U | Samoan & Wallis Islands | |
| SAUNDERS ISLAND VOLCANO | Synonym of MICHAEL | Antarctica & South Sandwich Islands | |
| SAUVETAGE, PITON | Cinder cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| SAVAI'I | Shield volcano | Historical | Samoan & Wallis Islands |
| SAVAI'I, TAFUA | Tuff cone of SAVAI'I | Samoan & Wallis Islands | |
| SAVALAN | Synonym of SABALAN | Iran & Afghanistan | |
| SAVANA, VOLCAN DE LA [CUYOTEPE] | Cone of APANECA RANGE | El Salvador & Honduras | |
| SAVICH | Stratovolcano of KIKHPINYCH | Kamchatka Peninsula | |
| SAVIGAN | Synonym of SARIGAN | Izu, Volcano, & Mariana Islands | |
| SAVO | Stratovolcano | Historical | Bougainville & Solomon Islands |
| SAWAD, HARRA ES- | Volcanic field | Historical | Arabia |
| SAWADOWSKY | Synonym of ZAVODOVSKI | Antarctica & South Sandwich Islands | |
| SAWAN-CHISAPPU | Dome of KUTCHARO | Hokkaido | |
| SAWAN-TISAPPU [SAWAN-CHISAPPU] | Dome of KUTCHARO | Hokkaido | |
| SAWARA-DAKE | Synonym of KOMAGA-TAKE | Hokkaido | |
| SAWARA-YAMA | Cone of FUJI | Honshu | |
| SAWTOOTH MOUNTAIN | Shield volcano of INDIAN HEAVEN | USA (Washington) | |
| SAXHOLAR | Cone of SNAEFELLSJOKULL | Iceland (western) | |
| SAYHUA, CERRO | Cinder cone of ANDAHUA-ORCOPAMPA | Perú | |
| SCARA | Pit crater of SETE CIDADES | Azores | |
| SCARLET HILL | Cone of HEARD | Indian Ocean (southern) | |
| SCARRUPO | Cone of ISCHIA | Italy | |
| SCAURI, CUDDIA DI | Shield volcano of PANTELLERIA | Italy | |
| SCENERY, MOUNT | Dome of SABA | West Indies | |
| SCHALKENMEHREN | Maar of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| SCHANK, MT. | Cone of NEWER VOLCANICS PROV | Australia | |
| SCHAPINSKAIA SOPKA | Synonym of KIZIMEN | Kamchatka Peninsula | |
| SCHILDKROTE [SKJALDBAKA] | Shield volcano of FREMRINAMUR | Iceland (northeastern) | |
| SCHINOPI | Thermal Feature of MILOS | Greece | |
| SCHISCHEL | Synonym of SHISHEL | Kamchatka Peninsula | |
| SCHIWELUTSCH | Synonym of SHIVELUCH | Kamchatka Peninsula | |
| SCHLEUTHER, MOUNT | Cone of GARUA HARBOUR | New Britain | |
| SCHMIDT | Shield volcano | Holocene | Kamchatka Peninsula |
| SCHONCHIN BUTTE | Cinder cone of MEDICINE LAKE | USA (California) | |
| SCHREIBERS MEADOW CONE | Cinder cone of BAKER | USA (Washington) | |
| SCHRIEBERS MEADOW [SCHREIBERS MEADOW CONE] | Cinder cone of BAKER | USA (Washington) | |
| SCHTJUBELJA [STUBEL] | Maar of KSUDACH | Kamchatka Peninsula | |
| SCHTSCHAPINSKIJ | Synonym of KIZIMEN | Kamchatka Peninsula | |
| SCHUBERTS FAIRY | Former crater of WHITE ISLAND | New Zealand | |
| SCHUVELUTSCH | Synonym of SHIVELUCH | Kamchatka Peninsula | |
| SCIARA | Vent of STROMBOLI | Italy | |
| SCIRCCA [GIULIA-FERDINANDEO] | Submarine vent of CAMPI FLEGREI MAR SICILIA | Italy | |
| SCIUVECHI, CUDDIA | Shield volcano of PANTELLERIA | Italy | |
| SCOTT | Cone of JAN MAYEN | Atlantic Ocean (Jan Mayen) | |
| SCOTT CONE | Cone of BUCKLE ISLAND | Antarctica & South Sandwich Islands | |
| SCOTT, MT. | Stratovolcano of CRATER LAKE | USA (Oregon) | |
| SCOTTS HEAD | Dome of PLAT PAYS, MORNE | West Indies | |
| SCOUT HILL | Cone of CRATER LAKE | USA (Oregon) | |
| SE, PICO DA | Stratovolcano of FLORES | Azores | |
| SEAL NUNATAKS GROUP | Pyroclastic cones | Uncertain | Antarctica & South Sandwich Islands |
| SEALANDIA BANK | Synonym of ZEALANDIA BANK | Izu, Volcano, & Mariana Islands | |
| SEAMOUNT X | Submarine volcano | Fumarolic | Izu, Volcano, & Mariana Islands |
| SEARA CERRADO DE LADEIRA | Pumice cone of SETE CIDADES | Azores | |
| SEBAIN, DJEBEL | Synonym of TAIR, JEBEL AT | Africa (northeastern) & Red Sea | |
| SECA, CALDEIRA | Crater of FLORES | Azores | |
| SECA, CALDEIRA | Pumice ring of SETE CIDADES | Azores | |
| SECA, LAGUNA | Pit crater of SANTA ANA | El Salvador & Honduras | |
| SECA, LAGUNA | Pit crater of APASTEPEQUE FIELD | El Salvador & Honduras | |
| SECA, LAGUNA | Crater of SAN CRISTOBAL | Nicaragua | |
| SECA, LAGUNA | Maar of PILAS, LAS | Nicaragua | |
| SECCA DEI PESCI | Dome of PANAREA | Italy | |
| SECCA D'ISCHIA | Cone of ISCHIA | Italy | |
| SECO, CERRO | Dome of VALLES CALDERA | USA (New Mexico) | |
| SECOND CANYON | Cone of ISKUT-UNUK RIVER CONES | Canada | |
| SEDAENG | Dome of TENGGER CALDERA | Java | |
| SEDANKA DOL | Synonym of SEDANKINSKY | Kamchatka Peninsula | |
| SEDANKINSKY | Shield volcano | Radiocarbon | Kamchatka Peninsula |
| SEDLO | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| SEEMALIK BUTTE | Cone of NUNIVAK ISLAND | Alaska (western) | |
| SEENG, KAWAH | Thermal Feature of WAYANG-WINDU | Java | |
| SEGARA ANAK | Caldera of RINJANI | Lesser Sunda Islands | |
| SEGARA MUNJAK | Crater of RINJANI | Lesser Sunda Islands | |
| SEGARA MUNTJAR [SEGARA MUNJAR] | Crater of RINJANI | Lesser Sunda Islands | |
| SEGARAWEDI KEDUL | Crater of TENGGER CALDERA | Java | |
| SEGARAWEDI KIDUL [SEGARAWEDI KEDUL] | Crater of TENGGER CALDERA | Java | |
| SEGARAWEDI LOR | Crater of TENGGER CALDERA | Java | |
| SEGEHIKI | Vent of IZU-TOBU | Honshu | |
| SEGERERUA PLATEAU | Pyroclastic cones | Holocene | Africa (eastern) |
| SEGORO BANDJARAN [SEGORO BANJARAN] | Crater of SUNDORO | Java | |
| SEGORO BANJARAN | Crater of SUNDORO | Java | |
| SEGORO WEDI | Crater of SUNDORO | Java | |
| SEGUAM | Stratovolcanoes | Historical | Aleutian Islands |
| SEGULA | Stratovolcano | Holocene | Aleutian Islands |
| SEHITTEPE | Dome of SUPHAN DAGI | Turkey | |
| SEKIGUCHI GROUP | Crater of IZU-TOBU | Honshu | |
| SEKIGUCHIGAWA-JORYU | Vent of IZU-TOBU | Honshu | |
| SEKINCAU BELIRANG | Calderas | Fumarolic | Sumatra |
| SEKINTJAU BELIRANG | Synonym of SEKINCAU BELIRANG | Sumatra | |
| SEKISON-ZAN | Dome of ASAMA | Honshu | |
| SELA | Crater of GEDE | Java | |
| SELAWAJAN | Synonym of SEULAWAH AGAM | Sumatra | |
| SELAWAJANTEN (SELAWAJANTEN) | Synonym of SEULAWAH AGAM | Sumatra | |
| SELHOLL NORTH | Crater Row of GRIMSNES | Iceland (southwestern) | |
| SELHOLL SOUTH | Crater of GRIMSNES | Iceland (southwestern) | |
| SELHRAUNSGIGIR | Crater Row of KRISUVIK | Iceland (southwestern) | |
| SELIMKARTINI | Cone of ERCIYES DAGI | Turkey | |
| SELLA [SADDLE ISLAND] | Cone of ZUBAIR, JEBEL | Africa (northeastern) & Red Sea | |
| SELLA, MONTI | Cinder cone of ETNA | Italy | |
| SELSUNDSHRAUN NORTH | Fissure vent of HEKLA | Iceland (southern) | |
| SELSUNDSHRAUN SOUTH | Fissure vent of HEKLA | Iceland (southern) | |
| SELVA DEL LAMONE | Cone of VULSINI | Italy | |
| SELVA DEL NAPOLITANO | Dome of ISCHIA | Italy | |
| SELVOGSHEIDI | Shield volcano of HENGILL | Iceland (southwestern) | |
| SEMBRANO, MT. | Stratovolcano of LAGUNA CALDERA | Luzon | |
| SEMBUNG, GUNUNG | Cone of SLAMET | Java | |
| SEMEROE | Synonym of SEMERU | Java | |
| SEMERU | Stratovolcano | Historical | Java |
| SEMERU | Cone of IYANG-ARGAPURA | Java | |
| SEMERU | Cone of IYANG-ARGAPURA | Java | |
| SEMI CRATER | Crater of MEDICINE LAKE | USA (California) | |
| SEMINUNG, GUNUNG | Stratovolcano of RANAU | Sumatra | |
| SEMISOPOCHNOI | Stratovolcano | Historical | Aleutian Islands |
| SEMKAROK | Dome of SHIVELUCH | Kamchatka Peninsula | |
| SEMONGKRONG, GUNUNG | Cone of TENGGER CALDERA | Java | |
| SEMONTE, MT. | Cone of VULSINI | Italy | |
| SEMPOE | Synonym of SEMPU | Sulawesi | |
| SEMPU | Caldera | Fumarolic | Sulawesi |
| SENDA-YAMA | Dome of IBUSUKI VOLCANIC FIELD | Ryukyu Islands & Kyushu | |
| SENDORO | Synonym of SUNDORO | Java | |
| SENGA, MONTE | Cone of CAMPI FLEGREI | Italy | |
| SENGERETI | Cone of KIEYO | Africa (eastern) | |
| SENHORA, PICA DA | Cone of FURNAS | Azores | |
| SENNIN-ZAN | Synonym of FUJI | Honshu | |
| SENSMORI | Dome of CHOKAI | Honshu | |
| SENTINEL ROCK | Stratovolcano of CRATER LAKE | USA (Oregon) | |
| SENTINEL, THE | Cinder cone of CRATERS OF THE MOON | USA (Idaho) | |
| SEONGINBONG | Synonym of ULREUNG | Korea | |
| SEOUL-WONSON | Synonym of CH'UGA-RYONG | Korea | |
| SEPANAS | Crater of LUMUT BALAI, BUKIT | Sumatra | |
| SERANGANI (SERANGANO) | Synonym of BALUT | Mindanao | |
| SERAWERNA | Synonym of TEON | Banda Sea | |
| SERDAN-ORIENTAL | Tuff cones | Holocene | México |
| SERDTZE ALAIDA | Dome of KURILE LAKE | Kamchatka Peninsula | |
| SEREH, GUNUNG | Synonym of SIRUNG | Lesser Sunda Islands | |
| SERET BERAPI | Synonym of SORIKMARAPI | Sumatra | |
| SERETMAT | Synonym of SURETAMATAI | Vanuatu | |
| SERGA | Cinder cone of TOLBACHIK | Kamchatka Peninsula | |
| SERGEEVA | Shield volcano of BELY | Kamchatka Peninsula | |
| SERGEIN | Cone of BAYUDA VOLCANIC FIELD | Africa (northern) | |
| SERGIEF | Stratovolcano | Uncertain | Aleutian Islands |
| SERGUEJEYSKI | Synonym of SERGIEF | Aleutian Islands | |
| SEROEA | Synonym of SERUA | Banda Sea | |
| SERPOVIDNY | Cinder cone of KOSTAKAN | Kamchatka Peninsula | |
| SERRA DO MORIAO [GUILHERME MONIZ] | Stratovolcano of TERCEIRA | Azores | |
| SERRA GIANNICOLA GRANDE | Cinder cone of ETNA | Italy | |
| SERRA GORDA | Cone of PICOS VOLCANIC SYSTEM | Azores | |
| SERRA PIZZUTA CALVARINA, MONTE | Cinder cone of ETNA | Italy | |
| SERRA PIZZUTA, MONTE | Cinder cone of ETNA | Italy | |
| SERRETA RIDGE | Submarine vent of TERCEIRA | Azores | |
| SERUA | Stratovolcano | Historical | Banda Sea |
| SERY, CRATERE | Crater of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| SESARGA | Synonym of SAVO | Bougainville & Solomon Islands | |
| SESEGARA HILLS | Synonym of SESSAGARA | New Guinea & D'Entrecasteaux Islands | |
| SESSAGARA | Pyroclastic cones | Holocene | New Guinea & D'Entrecasteaux Islands |
| SESSHO-ISHI | Thermal Feature of NASU | Honshu | |
| SESSHOGAWARA | Thermal Feature of KUSATSU-SHIRANE | Honshu | |
| SESSYO-ISI [SESSHO-ISHI] | Thermal Feature of NASU | Honshu | |
| SESTRENKA | Dome of UZON | Kamchatka Peninsula | |
| SETE CIDADES | Stratovolcano | Historical | Azores |
| SETO-YAMA | Dome of NII-JIMA | Izu, Volcano, & Mariana Islands | |
| SETUPA | Crater of LAWU | Java | |
| SEUGA | Cone of UPOLU | Samoan & Wallis Islands | |
| SEULAWAH AGAM | Stratovolcano | Historical | Sumatra |
| SEULAWAIH AGAM (SEULAWAIN AGAM) | Synonym of SEULAWAH AGAM | Sumatra | |
| SEVCKAR | Pyroclastic Cone of GHEGAM RIDGE | Caucasus, Georgia & Armenia | |
| SEVERGIN | Cone of KHARIMKOTAN | Kuril Islands | |
| SEVERGINA | Synonym of KHARIMKOTAN | Kuril Islands | |
| SEVERNO-KOSHELEVSKIE [VERKNE-KOSHELEVSKIE] | Thermal Feature of KOSHELEV | Kamchatka Peninsula | |
| SEVERNY | Shield volcano | Radiocarbon | Kamchatka Peninsula |
| SEVERNY CHERPUK | Cone of CHERPUK GROUP | Kamchatka Peninsula | |
| SEVERNY GAMCHEN | Stratovolcano of GAMCHEN | Kamchatka Peninsula | |
| SEYDISHOLAR | Crater Row of GRIMSNES | Iceland (southwestern) | |
| SFINKS | Dome of KSUDACH | Kamchatka Peninsula | |
| SHABUBEMBE | Crater of NYAMURAGIRA | Africa (central) | |
| SHACHI | Synonym of CURACOA | Tonga Islands | |
| SHADWELL, MT. | Cone of NEWER VOLCANICS PROV | Australia | |
| SHAHERU | Stratovolcano of NYIRAGONGO | Africa (central) | |
| SHAITANI | Cone of CHYULU HILLS | Africa (eastern) | |
| SHAKUNAGE HOT SPRINGS | Thermal Feature of KUSATSU-SHIRANE | Honshu | |
| SHALA | Synonym of O'A CALDERA | Africa (northeastern) & Red Sea | |
| SHALLA | Synonym of O'A CALDERA | Africa (northeastern) & Red Sea | |
| SHALMAN, JABAL | Dome of KISHB, HARRAT | Arabia | |
| SHAM HILL | Cone of BRIDGE RIVER CONES | Canada | |
| SHAMROCK HILL | Cone of HODSON | Antarctica & South Sandwich Islands | |
| SHAMUHIRO | Cone of NYAMURAGIRA | Africa (central) | |
| SHANDUN | Synonym of LEIZHOU BANDAO | Southeast Asia | |
| SHANGRI-LA | Dome of CHILLAN, NEVADOS DE | Central Chile & Argentina | |
| SHARAT KOVAKAB | Volcanic field | Holocene | Syria |
| SHARK ISLAND | Cone of ZUKUR | Africa (northeastern) & Red Sea | |
| SHARP PEAK | Stratovolcano of BULUSAN | Luzon | |
| SHARP PEAK | Dome of CRATER LAKE | USA (Oregon) | |
| SHASTA | Stratovolcano | Historical | USA (California) |
| SHASTA BUTTE | Synonym of SHASTA | USA (California) | |
| SHASTINA | Dome of SHASTA | USA (California) | |
| SHAVARYN-TSARAM | Cone of TARYATU-CHULUTU | Mongolia | |
| SHCHAPINSKAYA | Synonym of KIZIMEN | Kamchatka Peninsula | |
| SHE-TOE-SHAN [MAANSHAN] | Cinder cone of TENGCHONG | Southeast Asia | |
| SHEEP TRAIL BUTTE | Cinder cone of CRATERS OF THE MOON | USA (Idaho) | |
| SHEJIUSHAN [MAANSHAN] | Cinder cone of TENGCHONG | Southeast Asia | |
| SHELL MOUNTAIN | Stratovolcano of EDGECUMBE | Alaska (eastern) | |
| SHELTOWSKIJ | Synonym of ZHELTOVSKY | Kamchatka Peninsula | |
| SHENGLIDABAN | Cinder cone of KUNLUN VOLCANIC GROUP | China (western) | |
| SHEPHERD DOME | Cone of HUDSON MOUNTAINS | Antarctica & South Sandwich Islands | |
| SHERIDAN MOUNTAIN | Shield volcano of BACHELOR | USA (Oregon) | |
| SHERMAN CRATER | Crater of BAKER | USA (Washington) | |
| SHEROKHOVATAYA | Dome of SHIVELUCH | Kamchatka Peninsula | |
| SHEVELUCH | Synonym of SHIVELUCH | Kamchatka Peninsula | |
| SHIBASEKI | Thermal Feature of TSURUMI | Ryukyu Islands & Kyushu | |
| SHIBUNO-YU | Thermal Feature of TSURUMI | Ryukyu Islands & Kyushu | |
| SHICHIHO-YAMA | Synonym of FUJI | Honshu | |
| SHIELD NUNATAK | Cone of MELBOURNE | Antarctica & South Sandwich Islands | |
| SHIGA | Shield volcanoes | Holocene? | Honshu |
| SHIGA-KOGEN | Synonym of SHIGA | Honshu | |
| SHIH-MEN=TZU-SHAN [SHIMENZISHAN] | Cone of LONGGANG GROUP | China (eastern) | |
| SHIHAILONGWAN | Maar of LONGGANG GROUP | China (eastern) | |
| SHIHOREI | Pyroclastic Cone of KUTTARA | Hokkaido | |
| SHIKANOKASHIRA | Cone of FUJI | Honshu | |
| SHIKARIBETSU GROUP | Lava domes | Holocene? | Hokkaido |
| SHIKINE-JIMA | Dome of NII-JIMA | Izu, Volcano, & Mariana Islands | |
| SHIKINONARU-YAMA | Synonym of FUJI | Honshu | |
| SHIKOTSU | Caldera | Historical | Hokkaido |
| SHILIN-BOGDO | Cone of DARIGANGA VOLCANIC FIELD | Mongolia | |
| SHIMABARA | Thermal Feature of UNZEN | Ryukyu Islands & Kyushu | |
| SHIMAGARE-YAMA | Dome of KITA YATSUGA-TAKE | Honshu | |
| SHIMANOMINE | Dome of UNZEN | Ryukyu Islands & Kyushu | |
| SHIMENZISHAN | Cone of LONGGANG GROUP | China (eastern) | |
| SHIMOBORI | Crater of YAKE-DAKE | Honshu | |
| SHIMOKITA-HIUCHI | Synonym of MUTSU-HIUCHI-DAKE | Honshu | |
| SHIN-BEPPU | Thermal Feature of TSURUMI | Ryukyu Islands & Kyushu | |
| SHIN-DAKE | Stratovolcano of KUCHINOERABU-JIMA | Ryukyu Islands & Kyushu | |
| SHIN-FUJI | Stratovolcano of FUJI | Honshu | |
| SHIN-FUNKAKO | Crater of TOKACHI | Hokkaido | |
| SHIN-IO-JIMA | Synonym of FUKUTOKU-OKANOBA | Izu, Volcano, & Mariana Islands | |
| SHIN-IWO-JIMA | Synonym of FUKUTOKU-OKANOBA | Izu, Volcano, & Mariana Islands | |
| SHIN-IWO-JIMA [SHOWA-IWO-JIMA] | Dome of KIKAI | Ryukyu Islands & Kyushu | |
| SHIN-YAMA [MYOKO-SAN] | Dome of MYOKO | Honshu | |
| SHIN-ZAN | Dome of CHOKAI | Honshu | |
| SHINING MOUNTAIN | Synonym of KILIMANJARO | Africa (eastern) | |
| SHINMIYO-IKE | Crater of MIYAKE-JIMA | Izu, Volcano, & Mariana Islands | |
| SHINMOE-DAKE | Stratovolcano of KIRISHIMA | Ryukyu Islands & Kyushu | |
| SHINMYO | Maar of MIYAKE-JIMA | Izu, Volcano, & Mariana Islands | |
| SHINO-IKE | Crater of ON-TAKE | Honshu | |
| SHINO-YU | Thermal Feature of TSURUMI | Ryukyu Islands & Kyushu | |
| SHINSHERIDAKE | Synonym of PREVO PEAK | Kuril Islands | |
| SHINSHIRU FUJI | Synonym of PREVO PEAK | Kuril Islands | |
| SHINSHIRU-DAKE | Synonym of GORIASCHAIA SOPKA | Kuril Islands | |
| SHIOBARA | Caldera of TAKAHARA | Honshu | |
| SHIP ROCK | Tuff cone of PRINCE EDWARD ISLAND | Indian Ocean (southern) | |
| SHIP ROCK | Former dome of BOGOSLOF | Aleutian Islands | |
| SHIPUNEGAMORI | Dome of MIKURA-JIMA | Izu, Volcano, & Mariana Islands | |
| SHIRA | Stratovolcano of KILIMANJARO | Africa (eastern) | |
| SHIRAHATA HOT SPRINGS | Thermal Feature of KUSATSU-SHIRANE | Honshu | |
| SHIRAISHI-DAKE | Synonym of ZAO | Honshu | |
| SHIRAMIZU | Crater of YAKE-DAKE | Honshu | |
| SHIRANE | Submarine vent of SMITH ROCK | Izu, Volcano, & Mariana Islands | |
| SHIRANE-SAN | Cone of KUSATSU-SHIRANE | Honshu | |
| SHIRANE-SAN | Dome of NIKKO-SHIRANE | Honshu | |
| SHIRANEZAWA | Thermal Feature of KUSATSU-SHIRANE | Honshu | |
| SHIRANUTANOIKE | Maar of IZU-TOBU | Honshu | |
| SHIRATANI-YAMA | Stratovolcano of YAKE-DAKE | Honshu | |
| SHIRATORI-YAMA | Stratovolcano of KIRISHIMA | Ryukyu Islands & Kyushu | |
| SHIRETOKO-IO-ZAN | Synonym of SHIRETOKO-IWO-ZAN | Hokkaido | |
| SHIRETOKO-IWO-ZAN | Stratovolcano | Historical | Hokkaido |
| SHIRIBETSU | Stratovolcano | Holocene | Hokkaido |
| SHIRINKI | Stratovolcano | Holocene | Kuril Islands |
| SHIRIYAJIRI-DAKE (SHIRIYAZIRI) | Synonym of FUSS PEAK | Kuril Islands | |
| SHIROGANE | Thermal Feature of TOKACHI | Hokkaido | |
| SHIROKOE PLATEAU | Dome of UZON | Kamchatka Peninsula | |
| SHIROTSUKA | Cone of FUJI | Honshu | |
| SHISHALDIN | Stratovolcano | Historical | Aleutian Islands |
| SHISHEIKA | Lava dome | Radiocarbon | Kamchatka Peninsula |
| SHISHEJKA | Synonym of SHISHEIKA | Kamchatka Peninsula | |
| SHISHEL | Shield volcano | Holocene? | Kamchatka Peninsula |
| SHISHIDO-DAKE | Stratovolcano of KIRISHIMA | Ryukyu Islands & Kyushu | |
| SHISTE, CERRO EL | Lava cone of SAN DIEGO | El Salvador & Honduras | |
| SHIVELUCH | Stratovolcano | Historical | Kamchatka Peninsula |
| SHIVIT-TAYGA | Stratovolcano of AZAS PLATEAU | Russia (southeastern) | |
| SHIWANSHAN | Cone of LEIZHOU BANDAO | Southeast Asia | |
| SHIYINLING | Cone of LEIZHOU BANDAO | Southeast Asia | |
| SHMALEV | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| SHO-CHIRIPPU [IVAN GROZNY] | Somma volcano of GROZNY GROUP | Kuril Islands | |
| SHO-FUJI [KAIMON] | Stratovolcano of IBUSUKI VOLCANIC FIELD | Ryukyu Islands & Kyushu | |
| SHOAL BAY | Tuff cone of AUCKLAND FIELD | New Zealand | |
| SHOHAPINSKY | Synonym of KIZIMEN | Kamchatka Peninsula | |
| SHOJI-YAMA | Dome of OSORE-YAMA | Honshu | |
| SHOSHONE GEYSER BASIN | Thermal Feature of YELLOWSTONE | USA (Wyoming) | |
| SHOSHONE LAVA FIELD | Shield volcano | Holocene | USA (Idaho) |
| SHOSHUENCO [CHOSHUENCO] | Stratovolcano of MOCHO-CHOSHUENCO | Central Chile & Argentina | |
| SHOTGUN PEAK | Cone of MEDICINE LAKE | USA (California) | |
| SHOVE | Cone of NYAMURAGIRA | Africa (central) | |
| SHOWA | Crater of TOKACHI | Hokkaido | |
| SHOWA-IWO-JIMA | Dome of KIKAI | Ryukyu Islands & Kyushu | |
| SHOWA-SHINZAN | Dome of USU | Hokkaido | |
| SHTYUBEL' [STUBEL] | Maar of KSUDACH | Kamchatka Peninsula | |
| SHULI | Cone of NYAMURAGIRA | Africa (central) | |
| SHUPANOWSKIJ | Synonym of ZHUPANOVSKY | Kamchatka Peninsula | |
| SHUQRA VOLC FIELD | Synonym of SAWAD, HARRA ES- | Arabia | |
| SHURADO | Crater of NARUGO | Honshu | |
| SHUSHALDINSKAYA | Synonym of SHISHALDIN | Aleutian Islands | |
| SIAH BUTTE | Cinder cone of BACHELOR | USA (Oregon) | |
| SIANG | Crater of GALUNGGUNG | Java | |
| SIASSI ISLAND | Synonym of UMBOI | Northeast of New Guinea | |
| SIBAJAK | Synonym of SIBAYAK | Sumatra | |
| SIBANDUNG | Caldera of TOBA | Sumatra | |
| SIBANGGOR DJULU [SIBANGOR JULU] | Thermal Feature of SORIKMARAPI | Sumatra | |
| SIBANGOR JULU | Thermal Feature of SORIKMARAPI | Sumatra | |
| SIBANTENG | Thermal Feature of DIENG VOLCANIC COMPLEX | Java | |
| SIBAYAK | Stratovolcanoes | Historical | Sumatra |
| SIBINAL | Caldera of TACANA | México | |
| SIBUALBUALI | Stratovolcano | Holocene? | Sumatra |
| SIBULABOALIE | Synonym of SIBUALBUALI | Sumatra | |
| SIBULAND SPRING | Thermal Feature of APO | Mindanao | |
| SIBUTAN, DOLOK | Stratovolcano of TOBA | Sumatra | |
| SICUIN, CERRO DE | Cinder cone of MICHOACAN-GUANAJUATO | México | |
| SIDAS | Cone of EDZIZA | Canada | |
| SIDE CRATER | Crater of EREBUS | Antarctica & South Sandwich Islands | |
| SIEMSEN, VOLCAN | Cone of CHILLAN, NEVADOS DE | Central Chile & Argentina | |
| SIERRA | See proper name (e.g. SAN ANDRES, SIERRA DE) | Spanish for MOUNTAIN RANGE | |
| SIERRAS, LAS | Pleistocene caldera of MASAYA | Nicaragua | |
| SIETE CERROS, LOMA LOS | Cone of CHINGO | Guatemala | |
| SIETE FUENTES | Cinder cone of TENERIFE | Canary Islands | |
| SIETE, CERRO EL | Stratovolcano of PLATANAR | Costa Rica | |
| SIGA | Synonym of SHIGA | Honshu | |
| SIGADJAH [SIGAJAH] | Thermal Feature of DIENG VOLCANIC COMPLEX | Java | |
| SIGA'ELE | Cone of UPOLU | Samoan & Wallis Islands | |
| SIGAJAH | Thermal Feature of DIENG VOLCANIC COMPLEX | Java | |
| SIGALA, BATU | Crater of SINABUNG | Sumatra | |
| SIGLAGAH | Thermal Feature of DIENG VOLCANIC COMPLEX | Java | |
| SIGLUDUK | Cone of DIENG VOLCANIC COMPLEX | Java | |
| SIGNAL BUTTE | Cone of SHASTA | USA (California) | |
| SIGNAL DE L'ENCLOS | Crater of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| SIGNAL HILL | Stratovolcano of QUILL, THE | West Indies | |
| SIGOLDUHRAUN | Fissure vent of BARDARBUNGA | Iceland (northeastern) | |
| SIGUAM | Synonym of SEGUAM | Aleutian Islands | |
| SIGURDBREEN | Cone of JAN MAYEN | Atlantic Ocean (Jan Mayen) | |
| SIHARSLAN TEPE | Cone of ERCIYES DAGI | Turkey | |
| SIHMIRAN TEPE | Cone of NEMRUT DAGI | Turkey | |
| SIHSIHDAGI | Dome of SUPHAN DAGI | Turkey | |
| SIKHOTE-ALIN | Volcanic field | Holocene | Russia (southeastern) |
| SIKIDANG | Thermal Feature of DIENG VOLCANIC COMPLEX | Java | |
| SIKINE-ZIMA [SHIKINE-JIMA] | Dome of NII-JIMA | Izu, Volcano, & Mariana Islands | |
| SIKOTU | Synonym of SHIKOTSU | Hokkaido | |
| SIKUNANG | Cone of DIENG VOLCANIC COMPLEX | Java | |
| SIL | Synonym of BARRIER, THE | Africa (eastern) | |
| SILALI | Shield volcano | Ar/Ar | Africa (eastern) |
| SILAMUK | Pyroclastic Cone of MURIA | Java | |
| SILANGA HOT SPRING | Thermal Feature of SULU RANGE | New Britain | |
| SILANGAN | Cone of NATIB | Luzon | |
| SILAUNG | Vent of LOWER CHINDWIN | Southeast Asia | |
| SILAWAIH AGAM | Synonym of SEULAWAH AGAM | Sumatra | |
| SILAY | Stratovolcano | Fumarolic | Central Philippines |
| SILE [SILI] | Cone of LOLOBAU | New Britain | |
| SILENGE ISLAND | Cone of MUNDUA | New Britain | |
| SILENT CONE | Cinder cone of CRATERS OF THE MOON | USA (Idaho) | |
| SILERI | Cone of DIENG VOLCANIC COMPLEX | Java | |
| SILI | Shield volcano of OFU-OLOSEGA | Samoan & Wallis Islands | |
| SILI | Cone of LOLOBAU | New Britain | |
| SILLA | Dome of ZITACUARO-VALLE DE BRAVO | México | |
| SILLA, CERRO LA | Cone of ZITACUARO-VALLE DE BRAVO | México | |
| SILLA, CERRO LA | Dome of VALLE, EL | Panamá | |
| SILLANEGRA, VOLCAN | Pyroclastic Cone of COCHIQUITO VOLCANIC GROUP | Central Chile & Argentina | |
| SILLATEPEC | Dome of CUMBRES, LAS | México | |
| SILLON ABAJO, CERRITO EL | Lava cone of CHIQUIMULA VOLCANIC FIELD | Guatemala | |
| SILLON, CERRITO EL | Lava cone of CHIQUIMULA VOLCANIC FIELD | Guatemala | |
| SILUMAN, KAWAH | Crater of TANGKUBANPARAHU | Java | |
| SILVA, LA | Cinder cone of CHICHINAUTZIN | México | |
| SILVER LAKE | Cinder cones | Holocene? | USA (California) |
| SILVER LAKE | Dome of YELLOWSTONE | USA (Wyoming) | |
| SILVERTHRONE | Caldera | Holocene | Canada |
| SILVESTRI, MONTE | Cinder cone of ETNA | Italy | |
| SIMABARA | Synonym of UNZEN | Ryukyu Islands & Kyushu | |
| SIMACAK, URUK | Stratovolcano of SIBAYAK | Sumatra | |
| SIMAGH, JABAL | Maar of KISHB, HARRAT | Arabia | |
| SIMANOBORI | Synonym of MENDELEEV | Kuril Islands | |
| SIMBA, VOLCAN [AGUAS CALIENTES] | Stratovolcano of LASCAR | Northern Chile, Bolivia & Argentina | |
| SIMBI, LAKE | Maar of HOMA MOUNTAIN | Africa (eastern) | |
| SIMBO | Stratovolcanoes | Anthropology | Bougainville & Solomon Islands |
| SIMINYNG [GUNUNG SEMINUNG] | Stratovolcano of RANAU | Sumatra | |
| SIMOKITA-HIUTI | Synonym of MUTSU-HIUCHI-DAKE | Honshu | |
| SIMONE, MONTE | Cinder cone of ETNA | Italy | |
| SIMS BUTTE | Cinder cone of NORTH SISTER FIELD | USA (Oregon) | |
| SIMUSIRU FUDZI | Synonym of PREVO PEAK | Kuril Islands | |
| SIN NOMBRE | Cone of CAYUTUE-LA VIGUERIA | Southern Chile & Argentina | |
| SIN NOMBRE, CRATER | Crater of AZUL, CERRO | Central Chile & Argentina | |
| SIN NOMBRE, NEVADO | Stratovolcano of TUPUNGATITO | Central Chile & Argentina | |
| SIN-DAKE [SHIN-DAKE] | Stratovolcano of KUCHINOERABU-JIMA | Ryukyu Islands & Kyushu | |
| SIN-HUNKAKO [SHIN-FUNKAKO] | Crater of TOKACHI | Hokkaido | |
| SIN-IO-JIMA (SIN-IWO-ZIMA) | Synonym of FUKUTOKU-OKANOBA | Izu, Volcano, & Mariana Islands | |
| SIN-ZAN [SHIN-ZAN] | Dome of CHOKAI | Honshu | |
| SINABOENG | Synonym of SINABUNG | Sumatra | |
| SINABUN | Synonym of SINABUNG | Sumatra | |
| SINABUNG | Stratovolcano | Holocene | Sumatra |
| SINAI, MT. | Stratovolcano of ST. CATHERINE | West Indies | |
| SINARKA | Stratovolcano | Historical | Kuril Islands |
| SINARKO | Synonym of SINARKA | Kuril Islands | |
| SINDORO | Synonym of SUNDORO | Java | |
| SINGGALANG | Twin volcano of TANDIKAT | Sumatra | |
| SINGGALANG, DOLOK | Cone of TOBA | Sumatra | |
| SINGIRO | Cone of NYAMURAGIRA | Africa (central) | |
| SINGU PLATEAU | Fissure vents | Holocene | Southeast Asia |
| SINGUIL, CERRO | Cinder cones | Holocene | El Salvador & Honduras |
| SINI | Cone of UDOKAN PLATEAU | Russia (southeastern) | |
| SINILA | Cone of DIENG VOLCANIC COMPLEX | Java | |
| SINITIOPE, LOMA DE | Dome of CONCEPCION | Nicaragua | |
| SINMIO [SHINMIO] | Maar of MIYAKE-JIMA | Izu, Volcano, & Mariana Islands | |
| SINMOE-DAKE [SHINMOE-DAKE] | Stratovolcano of KIRISHIMA | Ryukyu Islands & Kyushu | |
| SINO-IKE [SHINO-IKE] | Crater of ON-TAKE | Honshu | |
| SINTUMBI | Cone of NGOZI | Africa (eastern) | |
| SINUMAAN | Cone of JOLO | Sulu Islands | |
| SIO TSIRARIPPU [IVAN GROZNY] | Somma volcano of GROZNY GROUP | Kuril Islands | |
| SIOPE | Cone of SAVAI'I | Samoan & Wallis Islands | |
| SIOSIORENA | Thermal Feature of DAWSON STRAIT GROUP | New Guinea & D'Entrecasteaux Islands | |
| SIPANDU | Thermal Feature of DIENG VOLCANIC COMPLEX | Java | |
| SIPISOPISO [DOLOK TANDUKBENUA] | Cone of TOBA | Sumatra | |
| SIPLE | Shield volcano | Holocene? | Antarctica & South Sandwich Islands |
| SIRAHATA | Synonym of KETOI | Kuril Islands | |
| SIRANE-SAN [SHIRANE-SAN] | Dome of NIKKO-SHIRANE | Honshu | |
| SIRATANI-YAMA [SHIRATANI-YAMA] | Stratovolcano of YAKE-DAKE | Honshu | |
| SIRATORI-YAMA [SHIRATORI-YAMA] | Cone of KIRISHIMA | Ryukyu Islands & Kyushu | |
| SIREN ROCK | Cone of HUDSON MOUNTAINS | Antarctica & South Sandwich Islands | |
| SIRENEVY | Stratovolcano of MEDVEZHIA | Kuril Islands | |
| SIRENEVY | Cone of DZENZURSKY | Kamchatka Peninsula | |
| SIRETOKO-IO-ZAN | Synonym of SHIRETOKO-IWO-ZAN | Hokkaido | |
| SIRETOKO-IWO-ZAN | Synonym of SHIRETOKO-IWO-ZAN | Hokkaido | |
| SIRIADZIRI | Synonym of FUSS PEAK | Kuril Islands | |
| SIROENG | Synonym of SIRUNG | Lesser Sunda Islands | |
| SIRONEMURI | Synonym of KETOI | Kuril Islands | |
| SIRUNG | Complex volcano | Historical | Lesser Sunda Islands |
| SISAGUK | Synonym of SHISHALDIN | Aleutian Islands | |
| SISEL | Synonym of SHISHEL | Kamchatka Peninsula | |
| SISIDO-DAKE [SHISHIDO-DAKE] | Stratovolcano of KIRISHIMA | Ryukyu Islands & Kyushu | |
| SISQUK (SISSAGJUK) | Synonym of SHISHALDIN | Aleutian Islands | |
| SISTERS, THE | Cone of ST. MICHAEL | Alaska (western) | |
| SITCHIN (SITIGNAK?) | Synonym of LITTLE SITKIN | Aleutian Islands | |
| SITCHIN | Synonym of GREAT SITKIN | Aleutian Islands | |
| SITIGNAK ? | Synonym of LITTLE SITKIN | Aleutian Islands | |
| SITIO GRANDE | Crater of SAN SALVADOR | El Salvador & Honduras | |
| SITIO HORNILLAS | Thermal Feature of RINCON DE LA VIEJA | Costa Rica | |
| SITKUM BUTTE | Cinder cone of BACHELOR | USA (Oregon) | |
| SIX SHOOTER BUTTE | Cone of MEDICINE LAKE | USA (California) | |
| SIYUT | Synonym of MAKATURING | Mindanao | |
| SIYUT | Synonym of RAGANG | Mindanao | |
| SIZMOS | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| SJADUKTA | Synonym of KSUDACH | Kamchatka Peninsula | |
| SJONARHOLL | Cone of SNAEFELLSJOKULL | Iceland (western) | |
| SKAFTA [LAKI] | Crater Row of GRIMSVOTN | Iceland (northeastern) | |
| SKALAFELL | Shield volcano of REYKJANES | Iceland (southwestern) | |
| SKALARALDA | Crater of ASKJA | Iceland (northeastern) | |
| SKALISTAYA | Dome of OPALA | Kamchatka Peninsula | |
| SKAPTARJOKULL [LAKI] | Crater Row of GRIMSVOTN | Iceland (northeastern) | |
| SKARDSMYRARHRAUN | Crater Row of HENGILL | Iceland (southwestern) | |
| SKAROS | Shield volcano of SANTORINI | Greece | |
| SKEIFUHRAUN | Fissure vent of BARDARBUNGA | Iceland (northeastern) | |
| SKERJAHRAUN | Fissure vent of EYJAFJOLL | Iceland (southern) | |
| SKI HEIL PEAK | Dome of LASSEN VOLCANIC CENTER | USA (California) | |
| SKINNER HILL | Dome of TARANAKI [EGMONT] | New Zealand | |
| SKJALDBAKA | Shield volcano of FREMRINAMUR | Iceland (northeastern) | |
| SKJALDBREIDUR | Shield volcano of PRESTAHNUKUR | Iceland (southwestern) | |
| SKOFLUNGER | Shield volcano of PRESTAHNUKUR | Iceland (southwestern) | |
| SKOTUHRYGGUR | Submarine vent of VESTMANNAEYJAR | Iceland (southern) | |
| SKRUKKEFJELLET | Dome of JAN MAYEN | Atlantic Ocean (Jan Mayen) | |
| SKRUKKELIA | Cone of JAN MAYEN | Atlantic Ocean (Jan Mayen) | |
| SKUGGADYNGJA | Shield volcano of FREMRINAMUR | Iceland (northeastern) | |
| SKURIDIN | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| SKYRTUNNA | Crater of LJOSUFJOLL | Iceland (western) | |
| SLADEN BOILING SPRINGS | Thermal Feature of GAUA | Vanuatu | |
| SLAMAT | Synonym of SLAMET | Java | |
| SLAMET | Stratovolcano | Historical | Java |
| SLATTUDALSHRAUN | Crater Row of BRENNISTEINSFJOLL | Iceland (southwestern) | |
| SLEET | Cone of EDZIZA | Canada | |
| SLETTAHRAUN | Fissure vent of TORFAJOKULL | Iceland (southern) | |
| SLUSHER NUNATAK | Cone of HUDSON MOUNTAINS | Antarctica & South Sandwich Islands | |
| SLYUNIN | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| SMAHRAUNAKULA | Cone of LJOSUFJOLL | Iceland (western) | |
| SMALES HILL [OTARA HILL] | Cone of AUCKLAND FIELD | New Zealand | |
| SMART, MT. | Cone of AUCKLAND FIELD | New Zealand | |
| SMBATASSAR | Cone of DAR-ALAGES | Caucasus, Georgia & Armenia | |
| SMEATON HILL | Cone of NEWER VOLCANICS PROV | Australia | |
| SMEROE (SMERU) | Synonym of SEMERU | Java | |
| SMIRNOV | Stratovolcano | Holocene | Kuril Islands |
| SMIROE | Synonym of SEMERU | Java | |
| SMITH | Dome of SANTORINI | Greece | |
| SMITH BUTTE | Cinder cone of ADAMS | USA (Washington) | |
| SMITH CRATER | Crater of RAOUL ISLAND | Kermadec Islands | |
| SMITH ROCK | Submarine volcano | Historical | Izu, Volcano, & Mariana Islands |
| SMITH VOLCANO | Cinder cone of BABUYAN CLARO | North of Luzon | |
| SMOKING MOSES | Synonym of SHISHALDIN | Aleutian Islands | |
| SMOKY MOUNTAIN | Synonym of UGASHIK-PEULIK | Alaska Peninsula | |
| SMYT BANK I | Submarine vent of CAMPI FLEGREI MAR SICILIA | Italy | |
| SMYT BANK II | Submarine vent of CAMPI FLEGREI MAR SICILIA | Italy | |
| SNAEFELLSJOKULL | Stratovolcano | Radiocarbon | Iceland (western) |
| SNAEKOLLUR | Dome of KERLINGARFJOLL | Iceland (southwestern) | |
| SNAG HILL | Cone of MEDICINE LAKE | USA (California) | |
| SNEGOVOY | Shield volcano | Holocene? | Kamchatka Peninsula |
| SNEZHNAYA | Synonym of SNEZHNIY | Kamchatka Peninsula | |
| SNEZHNIY | Shield volcano | Holocene? | Kamchatka Peninsula |
| SNIPES MOUNTAIN | Cinder cone of ADAMS | USA (Washington) | |
| SNIPPAKER CREEK | Cone of ISKUT-UNUK RIVER CONES | Canada | |
| SNOU [SNOW] | Stratovolcano of CHIRPOI | Kuril Islands | |
| SNOW | Stratovolcano of CHIRPOI | Kuril Islands | |
| SNOWSHOE LAVA FIELD | Vent of EDZIZA | Canada | |
| SNOWY MOUNTAIN | Stratovolcanoes | Radiocarbon | Alaska Peninsula |
| SOAL | Stratovolcano of UMBOI | Northeast of New Guinea | |
| SOBOLINY | Stratovolcano of MALY SEMIACHIK | Kamchatka Peninsula | |
| SOBOR | Synonym of VOON, TARSO | Africa (northern) | |
| SOBOROM | Thermal Feature of VOON, TARSO | Africa (northern) | |
| SOBOUROUN | Synonym of VOON, TARSO | Africa (northern) | |
| SOCHE | Stratovolcano | Radiocarbon | Ecuador |
| SOCHOL, CERRO | Cone of CHICHINAUTZIN | México | |
| SOCOMPA | Stratovolcano | Radiocarbon | Northern Chile, Bolivia & Argentina |
| SOCONUSCO | Synonym of TACANA | México | |
| SOCORRO | Shield volcano | Historical | México |
| SOCRIERE, LA | Dome of PLAT PAYS, MORNE | West Indies | |
| SODA DAM | Thermal Feature of VALLES CALDERA | USA (New Mexico) | |
| SODA LAKES | Maars | Holocene | USA (Nevada) |
| SODA PEAK | Cinder cone of WEST CRATER | USA (Washington) | |
| SODORE | Pyroclastic cones | Holocene | Africa (northeastern) & Red Sea |
| SOEKARIA CALDERA | Synonym of SUKARIA CALDERA | Lesser Sunda Islands | |
| SOEKET [SUKET] | Stratovolcano of RAUNG | Java | |
| SOELASIH | Synonym of TALANG | Sumatra | |
| SOELHEIMAJOKULL | Synonym of KATLA | Iceland (southern) | |
| SOEMBING | Synonym of SUMBING | Sumatra | |
| SOEMBING | Synonym of SUMBING | Java | |
| SOENDA CALDERA [SUNDA CALDERA] | Pleistocene caldera of TANGKUBANPARAHU | Java | |
| SOENDORO | Synonym of SUNDORO | Java | |
| SOENGPANACK | Vent of HALLA | Korea | |
| SOEOH-SENKE | Synonym of SUOH | Sumatra | |
| SOFUGAN | Stratovolcano | Uncertain | Izu, Volcano, & Mariana Islands |
| SOFUNOBORI | Synonym of TIATIA | Kuril Islands | |
| SOGAGIGIR | Crater Row of KRISUVIK | Iceland (southwestern) | |
| SOHU-GAN | Synonym of SOFUGAN | Izu, Volcano, & Mariana Islands | |
| SOI-TAYGA | Cone of AZAS PLATEAU | Russia (southeastern) | |
| SOLCHIARO | Tuff ring of CAMPI FLEGREI | Italy | |
| SOLEDAD, CERRO LA | Dome of TECUAMBURRO | Guatemala | |
| SOLFATARA | Crater of CAMPI FLEGREI | Italy | |
| SOLFATARA POOL | Thermal Feature of PINATUBO | Luzon | |
| SOLIMAN | Cinder cone of HIERRO | Canary Islands | |
| SOLIS | Maar of MICHOACAN-GUANAJUATO | México | |
| SOLITARIO, EL | Dome of IZTACCIHUATL | México | |
| SOLKATLA | Shield volcano of LANGJOKULL | Iceland (southwestern) | |
| SOLKATLA | Shield volcano of LANGJOKULL | Iceland (southwestern) | |
| SOLLIPULLI | Caldera | Radiocarbon | Central Chile & Argentina |
| SOLO | Synonym of JOLO | Sulu Islands | |
| SOLO, EL | Stratovolcano | Holocene | Northern Chile, Bolivia & Argentina |
| SOLOWA AGAM (SOLAWAIK AGAM) | Synonym of SEULAWAH AGAM | Sumatra | |
| SOMBUTANG | Crater of SIRUNG | Lesser Sunda Islands | |
| SOMMA CRATER | Crater of SOUFRIERE ST. VINCENT | West Indies | |
| SOMMA, MONTE | Stratovolcano of VESUVIUS | Italy | |
| SOMMA-VESUVIANA | Synonym of VESUVIUS | Italy | |
| SOMMATA, LA | Cone of VULCANO | Italy | |
| SONA, MONTE | Cinder cone of ETNA | Italy | |
| SONGA | Stratovolcano of BIBINOI | Halmahera | |
| SONGAKSAN | Tuff ring of HALLA | Korea | |
| SONGAN | Dome of BATUR | Lesser Sunda Islands | |
| SONGE | Dome of MERU | Africa (eastern) | |
| SONGYAUNG | Crater of LOWER CHINDWIN | Southeast Asia | |
| SONNE CONE | Cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| SOPAS, LAS | Thermal Feature of PUYEHUE-CORDON CAULLE | Central Chile & Argentina | |
| SOPKA | See proper name (e.g. ILINA, SOPKA) | Russian for VOLCANO | |
| SOPOCHNAIA | Synonym of ICHINSKY | Kamchatka Peninsula | |
| SOPOETAN | Synonym of SOPUTAN | Sulawesi | |
| SOPOTSCHNAJA | Synonym of ICHINSKY | Kamchatka Peninsula | |
| SOPUTAN | Stratovolcano | Historical | Sulawesi |
| SOR-JAN | Cone of JAN MAYEN | Atlantic Ocean (Jan Mayen) | |
| SORC-ALI (SORC-ALLI) | Synonym of MALLAHLE | Africa (northeastern) & Red Sea | |
| SORCALI | Synonym of SORK ALE | Africa (northeastern) & Red Sea | |
| SOREA | Synonym of SERUA | Banda Sea | |
| SORIEQ BERAPI | Synonym of SORIKMARAPI | Sumatra | |
| SORIKMARAPI | Stratovolcano | Historical | Sumatra |
| SORIKMERAPI | Synonym of SORIKMARAPI | Sumatra | |
| SORITIMEAT | Synonym of SURETAMATAI | Vanuatu | |
| SORK ALE | Stratovolcano | Holocene? | Africa (northeastern) & Red Sea |
| SOROPATI | Stratovolcano of TELOMOYO | Java | |
| SORUG CHUSHKU-UZU | Shield volcano of AZAS PLATEAU | Russia (southeastern) | |
| SOSED | Cinder cone of TOLBACHIK | Kamchatka Peninsula | |
| SOSNEADO, VOLCAN | Stratovolcano of ATUEL, CALDERA DEL | Central Chile & Argentina | |
| SOSSO, EHI | Stratovolcano of TOUSSIDE, TARSO | Africa (northern) | |
| SOTARA | Stratovolcano | Holocene | Colombia |
| SOUFRIERE GUADELOUPE | Stratovolcano | Historical | West Indies |
| SOUFRIERE HILLS | Stratovolcano | Historical | West Indies |
| SOUFRIERE ST. VINCENT | Stratovolcano | Historical | West Indies |
| SOUFRIERE VOLC CENTRE | Synonym of QUALIBOU | West Indies | |
| SOUFRIERE, LA | Dome of SOUFRIERE GUADELOUPE | West Indies | |
| SOUNKYO | Thermal Feature of DAISETSU | Hokkaido | |
| SOUNZAN | Thermal Feature of HAKONE | Honshu | |
| SOUR CREEK | Dome of YELLOWSTONE | USA (Wyoming) | |
| SOURCE HILL | Fissure vent of SPECTRUM RANGE | Canada | |
| SOURETAMATI | Synonym of SURETAMATAI | Vanuatu | |
| SOUTH BELKNAP | Cinder cone of BELKNAP | USA (Oregon) | |
| SOUTH BUTTE | Cinder cone of ADAMS | USA (Washington) | |
| SOUTH CINDER PEAK | Cinder cone of JEFFERSON | USA (Oregon) | |
| SOUTH COULEE | Dome of MONO CRATERS | USA (California) | |
| SOUTH DAUGHTER [TURANGUNAN] | Stratovolcano of RABAUL | New Britain | |
| SOUTH EAST MOUNTAIN | Stratovolcano of ST. CATHERINE | West Indies | |
| SOUTH FORK | Cinder cone of GOLDEN TROUT CREEK | USA (California) | |
| SOUTH GROUP | Cinder cone of SAND MOUNTAIN FIELD | USA (Oregon) | |
| SOUTH ISLAND | Stratovolcano | Historical | Africa (eastern) |
| SOUTH MOUNTAIN | Dome of VALLES CALDERA | USA (New Mexico) | |
| SOUTH PAGAN | Stratovolcano of PAGAN | Izu, Volcano, & Mariana Islands | |
| SOUTH PIT | Pit crater of MAUNA LOA | Hawaiian Islands | |
| SOUTH RIFT VENT FIELD | Thermal Feature of AXIAL SEAMOUNT | Pacific Ocean (northern) | |
| SOUTH RIFT ZONE | Fissure vent of AXIAL SEAMOUNT | Pacific Ocean (northern) | |
| SOUTH RIFT ZONE | Fissure vent of MAUNA KEA | Hawaiian Islands | |
| SOUTH SISTER | Complex volcano | Radiocarbon | USA (Oregon) |
| SOUTH SON | Synonym of BAMUS | New Britain | |
| SOUTH SOUFRIERE HILLS | Stratovolcano of SOUFRIERE HILLS | West Indies | |
| SOUTH TWIN | Dome of ILIAMNA | Alaska (southwestern) | |
| SOUTHEAST CRATER | Crater of ETNA | Italy | |
| SOUTHEAST CRATER | Crater of ANATAHAN | Izu, Volcano, & Mariana Islands | |
| SOUTHERN CRATER | Crater of APO | Mindanao | |
| SOUTHERN CRATER | Crater of KANLAON | Central Philippines | |
| SOUTHERN DOME | Dome of OKATAINA | New Zealand | |
| SOUTHERN EPR-SEGMENT I | Submarine volcano | Magnetism | Pacific Ocean (eastern) |
| SOUTHERN EPR-SEGMENT J | Submarine volcano | Magnetism | Pacific Ocean (eastern) |
| SOUTHERN EPR-SEGMENT K | Submarine volcano | Historical | Pacific Ocean (eastern) |
| SOUTHERN SIKHOTE-ALIN | Synonym of SIKHOTE-ALIN | Russia (southeastern) | |
| SOUTHERN TUYA | Tuya of TUYA VOLCANIC FIELD | Canada | |
| SOUTHWEST HILL [VOLCAN SUDOESTE] | Cinder cone of SAN QUINTIN VOLCANIC FIELD | México | |
| SOUTHWEST RIFT ZONE | Fissure vent of AXIAL SEAMOUNT | Pacific Ocean (northern) | |
| SOUTHWEST RIFT ZONE | Fissure vent of KILAUEA | Hawaiian Islands | |
| SOUTHWEST RIFT ZONE | Fissure vent of MAUNA LOA | Hawaiian Islands | |
| SOVGAVAN PLATEAU VOLC FIELD | Fissure vent of SIKHOTE-ALIN | Russia (southeastern) | |
| SOZAN | Dome of NUMAZAWA | Honshu | |
| SPACCATA, MONTAGNA | Crater of CAMPI FLEGREI | Italy | |
| SPANISH BONK | Cone of WELLS GRAY-CLEARWATER | Canada | |
| SPANISH CREEK [SPANISH LAKE] | Cone of WELLS GRAY-CLEARWATER | Canada | |
| SPANISH LAKE | Cone of WELLS GRAY-CLEARWATER | Canada | |
| SPANISH MUMP | Cone of WELLS GRAY-CLEARWATER | Canada | |
| SPECTRUM RANGE | Shield volcano | Holocene | Canada |
| SPENCE HOT SPRING | Thermal Feature of VALLES CALDERA | USA (New Mexico) | |
| SPHINX | Dome of EDZIZA | Canada | |
| SPHINX MORAINE | Vent of GARIBALDI LAKE | Canada | |
| SPINA, MONTE | Dome of CAMPI FLEGREI | Italy | |
| SPINAIO, MT. | Cone of VULSINI | Italy | |
| SPITAKSAR | Dome of GHEGAM RIDGE | Caucasus, Georgia & Armenia | |
| SPLIT BUTTE | Cone of CRATERS OF THE MOON | USA (Idaho) | |
| SPLIT BUTTE | Maar of WAPI LAVA FIELD | USA (Idaho) | |
| SPOKOINY | Stratovolcano | Radiocarbon | Kamchatka Peninsula |
| SPRING BUTTE | Cone of NEWBERRY | USA (Oregon) | |
| SPRING GHAUT SOUFRIERE | Thermal Feature of SOUFRIERE HILLS | West Indies | |
| SPRING HILL | Cone of NEWER VOLCANICS PROV | Australia | |
| SPRING HILL | Cone of SHASTA | USA (California) | |
| SPRINKER | Maar of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| SPURR | Stratovolcano | Historical | Alaska (southwestern) |
| SQUAW LAKE | Crater of YELLOWSTONE | USA (Wyoming) | |
| SQUAW RIDGE LAVA FIELD | Volcanic field | Holocene? | USA (Oregon) |
| SREDNI | Stratovolcano of MEDVEZHIA | Kuril Islands | |
| SREDNII | Submarine volcano | Holocene | Kuril Islands |
| SREDNIY | Crater of EBEKO | Kuril Islands | |
| SREDNY | Stratovolcano of USHKOVSKY | Kamchatka Peninsula | |
| SREDNY | Shield volcano of TUZOVSKY | Kamchatka Peninsula | |
| SREDNYAYA [SREDNY] | Stratovolcano of USHKOVSKY | Kamchatka Peninsula | |
| SREZANNAIA MOUNTAIN | Synonym of MALY SEMIACHIK | Kamchatka Peninsula | |
| SREZANNYI | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| SRODJO [SROJA] | Cone of DIENG VOLCANIC COMPLEX | Java | |
| SROJA | Cone of DIENG VOLCANIC COMPLEX | Java | |
| SRONGGA, BUKIT | Cone of BATUR | Lesser Sunda Islands | |
| SSAWADOWSKI | Synonym of ZAVODOVSKI | Antarctica & South Sandwich Islands | |
| ST. ALLOURAN | Cone of KERGUELEN ISLANDS | Indian Ocean (southern) | |
| ST. ANDREW STRAIT | Complex volcano | Historical | Admiralty Islands |
| ST. ANTONY PEAK | Synonym of TIATIA | Kuril Islands | |
| ST. AUGUSTINE | Synonym of AUGUSTINE | Alaska (southwestern) | |
| ST. CATHERINE | Stratovolcano | Holocene | West Indies |
| ST. DOLMAT | Synonym of FOURPEAKED | Alaska Peninsula | |
| ST. GEORGE'S HARBOR | Crater of ST. CATHERINE | West Indies | |
| ST. GEORGE'S HILL | Stratovolcano of SOUFRIERE HILLS | West Indies | |
| ST. HELENS | Stratovolcano | Historical | USA (Washington) |
| ST. HELIERS | Tuff ring of AUCKLAND FIELD | New Zealand | |
| ST. HYACINTHE, MT. | Synonym of EDGECUMBE | Alaska (eastern) | |
| ST. JOHN, MT. | Cone of AUCKLAND FIELD | New Zealand | |
| ST. JOHN'S FLAT | Dome of SABA | West Indies | |
| ST. JOSEPH'S MT. [LASSEN PEAK] | Dome of LASSEN VOLCANIC CENTER | USA (California) | |
| ST. MARYS CRATER | Maar of AUCKLAND FIELD | New Zealand | |
| ST. MICHAEL | Shield volcanoes | Anthropology | Alaska (western) |
| ST. MICHAEL MOUNTAIN | Cone of ST. MICHAEL | Alaska (western) | |
| ST. PAUL | Stratovolcano | Historical | Indian Ocean (southern) |
| ST. PAUL ISLAND | Shield volcano | Radiocarbon | Alaska (western) |
| ST. PAULO | Synonym of ST. PAUL | Indian Ocean (southern) | |
| ST. PETER'S DOME | Dome of VALLES CALDERA | USA (New Mexico) | |
| ST. THOMAS | Synonym of SAO TOME | Africa (western) | |
| STAKAHRAUN | Fissure vent of HEKLA | Iceland (southern) | |
| STAMPAR | Crater Row of REYKJANES | Iceland (southwestern) | |
| STANGARHALS | Fissure vent of HENGILL | Iceland (southwestern) | |
| STAR PEAK | Synonym of MERE LAVA | Vanuatu | |
| STARICHKY | Cinder cone of TOLBACHIK | Kamchatka Peninsula | |
| STARY KIKHPINYCH | Stratovolcano of KIKHPINYCH | Kamchatka Peninsula | |
| STARY SHEVELUCH | Stratovolcano of SHIVELUCH | Kamchatka Peninsula | |
| STATE PRESIDENT SWART PEAK | Cone of MARION ISLAND | Indian Ocean (southern) | |
| STAUGHTONS HILL | Maar of NEWER VOLCANICS PROV | Australia | |
| STE-ROSE, PITON | Cinder cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| STEAMBOAT SPRINGS | Lava domes | Pleistocene-Fumarolic | USA (Nevada) |
| STEAMING HILL LAKE | Synonym of GAUA | Vanuatu | |
| STEAMY GULCH HOT SPRINGS | Thermal Feature of ST. HELENS | USA (Washington) | |
| STEFANOS | Vent of NISYROS | Greece | |
| STELLER | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| STELLER | Stratovolcano | Holocene | Alaska Peninsula |
| STENA | Dome of KSUDACH | Kamchatka Peninsula | |
| STENA | Stratovolcano of MALY SEMIACHIK | Kamchatka Peninsula | |
| STEP CANYON HOT SPRINGS | Thermal Feature of ST. HELENS | USA (Washington) | |
| STEPHANOS [STEFANOS] | Vent of NISYROS | Greece | |
| STEPHENS HILL | Cone of ST. MICHAEL | Alaska (western) | |
| STEPOVAK BAY 2 | Cinder cone | Holocene | Alaska Peninsula |
| STEPOVAK BAY 3 | Cinder cone | Holocene? | Alaska Peninsula |
| STEPOVAK BAY 4 | Stratovolcano | Pleistocene | Alaska Peninsula |
| STERNA GAMBRU | Dome of METHANA | Greece | |
| STOCKYARD HILL | Tuff ring of NEWER VOLCANICS PROV | Australia | |
| STOKAP | Stratovolcano of BOGATYR RIDGE | Kuril Islands | |
| STOLOVAYA | Dome of OPALA | Kamchatka Peninsula | |
| STONE MOUNTAIN [LITTLE GLASS MOUNTAIN] | Dome of MEDICINE LAKE | USA (California) | |
| STONY BEACH HILLS | Cinder cone of TRISTAN DA CUNHA | Atlantic Ocean (southern) | |
| STONY HILL | Dome of TRISTAN DA CUNHA | Atlantic Ocean (southern) | |
| STONY HILL GROUP | Cinder cone of TRISTAN DA CUNHA | Atlantic Ocean (southern) | |
| STORA ELDBORG UNDIR GEITLAHLID | Crater Row of BRENNISTEINSFJOLL | Iceland (southwestern) | |
| STORAHVERSMOR | Shield volcano of THEISTAREYKJARBUNGA | Iceland (northeastern) | |
| STORAVITI | Shield volcano of THEISTAREYKJARBUNGA | Iceland (northeastern) | |
| STORHOFDI | Tuff cone of VESTMANNAEYJAR | Iceland (southern) | |
| STORHOFDI | Cone of ORAEFAJOKULL | Iceland (southeastern) | |
| STORI BOLLI | Crater Row of BRENNISTEINSFJOLL | Iceland (southwestern) | |
| STORM | Cone of EDZIZA | Canada | |
| STOVES OF NERO | Crater of CAMPI FLEGREI | Italy | |
| STRARIY | Cinder cone of OKA PLATEAU | Russia (southeastern) | |
| STRAWBERRY KNOLLS | Cone of MARKAGUNT PLATEAU | USA (Utah) | |
| STRELOSHNAIA SOPKA | Synonym of KORYAKSKY | Kamchatka Peninsula | |
| STRELOTSCHNAJA | Synonym of KORYAKSKY | Kamchatka Peninsula | |
| STROHN | Maar of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| STROMBOLI | Stratovolcano | Historical | Italy |
| STROMBOLICCHIO | Cone of STROMBOLI | Italy | |
| STROMPAR | Shield volcano of BRENNISTEINSFJOLL | Iceland (southwestern) | |
| STRONGHYLE [RIVA] | Pleistocene caldera of SANTORINI | Greece | |
| STRONGYLE | Synonym of STROMBOLI | Italy | |
| STRYTUHRAUN | Shield volcano of LANGJOKULL | Iceland (southwestern) | |
| STUART HILL | Shield volcano of ST. MICHAEL | Alaska (western) | |
| STUART HILL [STUERT HILL] | Cinder cone of UTILA ISLAND | El Salvador & Honduras | |
| STUBEL CRATER | Maar of KSUDACH | Kamchatka Peninsula | |
| STUERT HILL | Cinder cone of UTILA ISLAND | El Salvador & Honduras | |
| STUFE DI KAZEN | Cone of PANTELLERIA | Italy | |
| STUPENCHATY | Dome of BEZYMIANNY | Kamchatka Peninsula | |
| STUPENCHATY BASTION | Stratovolcano of MALY SEMIACHIK | Kamchatka Peninsula | |
| STURGE ISLAND | Stratovolcano | Uncertain | Antarctica & South Sandwich Islands |
| STYAKS SWAMP | Cone of AUCKLAND FIELD | New Zealand | |
| SUACHU | Synonym of AVACHINSKY | Kamchatka Peninsula | |
| SUBAI [KUDRIAVY] | Stratovolcano of MEDVEZHIA | Kuril Islands | |
| SUBIA, PUIG | Cone of OLOT VOLCANIC FIELD | Western Europe | |
| SUCHILTEPEQUEZ | Synonym of ATITLAN | Guatemala | |
| SUCHIOC CHICO | Cinder cone of CHICHINAUTZIN | México | |
| SUCHIOC GRANDE | Cinder cone of CHICHINAUTZIN | México | |
| SUCHITAN | Stratovolcanoes | Holocene | Guatemala |
| SUCHITEPEQUEZ | Synonym of ATITLAN | Guatemala | |
| SUDOESTE, VOLCAN | Cinder cone of SAN QUINTIN VOLCANIC FIELD | México | |
| SUDSOHN | Synonym of BAMUS | New Britain | |
| SUDUREY | Cone of VESTMANNAEYJAR | Iceland (southern) | |
| SUDURGIGAR | Fissure vent of HEKLA | Iceland (southern) | |
| SUELICH | Former dome of SHIVELUCH | Kamchatka Peninsula | |
| SUELICH | Former dome of SHIVELUCH | Kamchatka Peninsula | |
| SUEMEZ STRAIT | Vent of TLEVAK STRAIT-SUEMEZ IS. | Alaska (eastern) | |
| SUGAR BOWL | Dome of ST. HELENS | USA (Washington) | |
| SUGAR LOAF [LEVERA ISLAND] | Dome of ST. CATHERINE | West Indies | |
| SUGARLOAF | Cone of MAKUSHIN | Aleutian Islands | |
| SUGARLOAF | Dome of QUILL, THE | West Indies | |
| SUGARLOAF MOUNTAIN | Dome of COSO VOLCANIC FIELD | USA (California) | |
| SUGARLOAF PEAK | Stratovolcano of SEMISOPOCHNOI | Aleutian Islands | |
| SUGARPINE BUTTE | Cinder cone of NEWBERRY | USA (Oregon) | |
| SUGATAMI-NO-IKE | Crater of DAISETSU | Hokkaido | |
| SUGIGAMINE | Stratovolcano of ZAO | Honshu | |
| SUGOBO [ANDREW'S CONE] | Cone of BARRIER, THE | Africa (eastern) | |
| SUGUTA RIVER HOT SPRINGS | Thermal Feature of EMURUANGOGOLAK | Africa (eastern) | |
| SUGUTA-LOGKIPI | Thermal Feature of BARRIER, THE | Africa (eastern) | |
| SUIRO | Dome of BILIRAN | Central Philippines | |
| SUIYO SEAMOUNT | Submarine volcano | Fumarolic | Izu, Volcano, & Mariana Islands |
| SUJUT | Synonym of MAKATURING | Mindanao | |
| SUJUT | Synonym of RAGANG | Mindanao | |
| SUKARIA CALDERA | Caldera | Fumarolic | Lesser Sunda Islands |
| SUKAWA-DAKE | Synonym of KURIKOMA | Honshu | |
| SUKET | Stratovolcano of RAUNG | Java | |
| SUKHOI | Stratovolcano of MALY SEMIACHIK | Kamchatka Peninsula | |
| SUKUMO-YAMA | Cone of IZU-TOBU | Honshu | |
| SUKUTA SEE [SUGUTA-LOGKIPI] | Thermal Feature of BARRIER, THE | Africa (eastern) | |
| SULFUR HILL [JALAJALA] | Thermal Feature of LAGUNA CALDERA | Luzon | |
| SULFUR SPRINGS | Thermal Feature of PLAT PAYS, MORNE | West Indies | |
| SULFUR WORKS | Thermal Feature of LASSEN VOLCANIC CENTER | USA (California) | |
| SULFUREO, LAGO [LAGO VECCIENNA] | Crater of LARDERELLO | Italy | |
| SULLA TACOMI [TOLIRE JAHA] | Crater of GAMALAMA | Halmahera | |
| SULNASKER | Cone of VESTMANNAEYJAR | Iceland (southern) | |
| SULPHUR BANK | Thermal Feature of KILAUEA | Hawaiian Islands | |
| SULPHUR CONE | Cone of MAUNA LOA | Hawaiian Islands | |
| SULPHUR CREEK | Crater Row of RABAUL | New Britain | |
| SULPHUR HOT SPRINGS | Thermal Feature of GLACIER PEAK | USA (Washington) | |
| SULPHUR ISLAND | Synonym of IOTO [IWO-JIMA] | Izu, Volcano, & Mariana Islands | |
| SULPHUR LAGOON [LOWER TE MARI] | Crater of TONGARIRO | New Zealand | |
| SULPHUR LAKE | Thermal Feature of IAMALELE | New Guinea & D'Entrecasteaux Islands | |
| SULPHUR SPRINGS | Thermal Feature of VALLES CALDERA | USA (New Mexico) | |
| SULPHUR SPRINGS | Vent of QUALIBOU | West Indies | |
| SULPHUR SPRINGS | Vent of QUALIBOU | West Indies | |
| SULPHUR VALLEY | Thermal Feature of WHALE ISLAND | New Zealand | |
| SULU | Synonym of JOLO | Sulu Islands | |
| SULU HILLS | Synonym of SULU RANGE | New Britain | |
| SULU RANGE | Stratovolcanoes | Fumarolic | New Britain |
| SUMACO | Stratovolcano | Historical | Ecuador |
| SUMBER PANAS | Thermal Feature of PERBAKTI-GAGAK | Java | |
| SUMBING | Stratovolcano | Historical | Sumatra |
| SUMBING | Stratovolcano | Historical | Java |
| SUMBING | Dome of KELUT | Java | |
| SUMISU DAI-ICHI KNOLL | Submarine vent of SMITH ROCK | Izu, Volcano, & Mariana Islands | |
| SUMISU DAI-NI KNOLL | Submarine vent of SMITH ROCK | Izu, Volcano, & Mariana Islands | |
| SUMISU KNOLL NO. 1 [SUMISU DAI-ICHI KNOLL] | Submarine vent of SMITH ROCK | Izu, Volcano, & Mariana Islands | |
| SUMISU KNOLL NO. 2 [SUMISU DAI-NI KNOLL] | Submarine vent of SMITH ROCK | Izu, Volcano, & Mariana Islands | |
| SUMISU-JIMA (SUMISU-SHO) | Synonym of SMITH ROCK | Izu, Volcano, & Mariana Islands | |
| SUMISU-JIMA | Cone of SMITH ROCK | Izu, Volcano, & Mariana Islands | |
| SUMIYOSHI-IKE | Maars | Radiocarbon | Ryukyu Islands & Kyushu |
| SUMUR | Crater of DIENG VOLCANIC COMPLEX | Java | |
| SUMUR BANDUNG | Crater of ARJUNO-WELIRANG | Java | |
| SUNDA CALDERA | Pleistocene caldera of TANGKUBANPARAHU | Java | |
| SUNDAY ISLAND | Synonym of RAOUL ISLAND | Kermadec Islands | |
| SUNDHNUKAR | Crater Row of REYKJANES | Iceland (southwestern) | |
| SUNDORO | Stratovolcano | Historical | Java |
| SUNFLOWER FLAT | Dome of LASSEN VOLCANIC CENTER | USA (California) | |
| SUNGAL | Cinder cone of JOLO | Sulu Islands | |
| SUNGAY, MT. | Stratovolcano of TAAL | Luzon | |
| SUNRISE | Thermal Feature of MYOJIN KNOLL | Izu, Volcano, & Mariana Islands | |
| SUNSET | Cinder cone of CRATERS OF THE MOON | USA (Idaho) | |
| SUNSET CRATER | Cinder cone | Dendrochronology | USA (Arizona) |
| SUOH | Calderas | Historical | Sumatra |
| SUOU-ANA | Crater of MIYAKE-JIMA | Izu, Volcano, & Mariana Islands | |
| SUPHAN DAGI | Stratovolcano | Holocene | Turkey |
| SUPPLY REEF | Submarine volcano | Hydrophonic | Izu, Volcano, & Mariana Islands |
| SURETAMATAI | Complex volcano | Historical | Vanuatu |
| SURETAMETAI | Synonym of SURETAMATAI | Vanuatu | |
| SURIBACHI-KAKOKYU | Cone of TOKACHI | Hokkaido | |
| SURIBACHI-YAMA | Cinder cone of IOTO [IWO-JIMA] | Izu, Volcano, & Mariana Islands | |
| SURIBATI-YAMA [SURIBACHI-YAMA] | Cinder cone of IOTO [IWO-JIMA] | Izu, Volcano, & Mariana Islands | |
| SURPRISE LAKE VOLC FIELD | Synonym of ATLIN VOLCANIC FIELD | Canada | |
| SURTSEY | Tuff cone of VESTMANNAEYJAR | Iceland (southern) | |
| SURUNDARO, CERRO DE | Cinder cone of MICHOACAN-GUANAJUATO | México | |
| SUSAH, KAWAH | Thermal Feature of SALAK | Java | |
| SUSAKI | Cone of SUWANOSE-JIMA | Ryukyu Islands & Kyushu | |
| SUSUA | Synonym of SUSWA | Africa (eastern) | |
| SUSUNG MALAKI | Dome of LABO | Luzon | |
| SUSWA | Shield volcano | Holocene | Africa (eastern) |
| SUTARENGGA | Dome of MURIA | Java | |
| SUTDONDURAN | Cone of ERCIYES DAGI | Turkey | |
| SUWA FUJI [TATESHINA-YAMA} | Stratovolcano of KITA YATSUGA-TAKE | Honshu | |
| SUWANOSE-JIMA | Stratovolcanoes | Historical | Ryukyu Islands & Kyushu |
| SUWANOSE-JIMA OKI | Submarine vent of SUWANOSE-JIMA | Ryukyu Islands & Kyushu | |
| SUWANOSE-ZIMA | Synonym of SUWANOSE-JIMA | Ryukyu Islands & Kyushu | |
| SUWOH | Synonym of SUOH | Sumatra | |
| SUWOLBONG | Tuff ring of HALLA | Korea | |
| SUYAMA-DAKE | Synonym of KURIKOMA | Honshu | |
| SUYELICH [SUELICH] | Former dome of SHIVELUCH | Kamchatka Peninsula | |
| SUYUL HANISH | Cone of HANISH | Africa (northeastern) & Red Sea | |
| SUZANNA MOUNT | Cone of BAS DONG NAI | Southeast Asia | |
| SUZUGA-TAKE | Dome of AKAGI | Honshu | |
| SVALASKARDSHRAUN | Crater Row of VATNAFJOLL | Iceland (southern) | |
| SVALTHUFA | Cone of SNAEFELLSJOKULL | Iceland (western) | |
| SVARTADYNGJA | Shield volcano of ASKJA | Iceland (northeastern) | |
| SVARTAHRAUN | Crater Row of LANGJOKULL | Iceland (southwestern) | |
| SVARTIHRYGGUR | Crater Row of BRENNISTEINSFJOLL | Iceland (southwestern) | |
| SVARTIKROKUR | Crater Row of BARDARBUNGA | Iceland (northeastern) | |
| SVEIFLUGIGIR | Crater Row of KRISUVIK | Iceland (southwestern) | |
| SVEINAGJA | Fissure vent of ASKJA | Iceland (northeastern) | |
| SVEINAR | Fissure vent of FREMRINAMUR | Iceland (northeastern) | |
| SVIAGIGUR | Synonym of GRIMSVOTN | Iceland (northeastern) | |
| SVINHOFDARHRAUN | Fissure vent of HEKLA | Iceland (southern) | |
| SVORTUBORGIR | Crater Row of KRAFLA | Iceland (northeastern) | |
| SVORTUTINDAR | Cone of SNAEFELLSJOKULL | Iceland (western) | |
| SVYASHCHENNAYA | Cone of TUNKIN DEPRESSION | Russia (southeastern) | |
| SW USANGU BASIN | Lava domes | Holocene | Africa (eastern) |
| SWAMP WELLS BUTTE | Cone of NEWBERRY | USA (Oregon) | |
| SWARTKOP POINT | Tuff cone of MARION ISLAND | Indian Ocean (southern) | |
| SYKES | Maar of PINACATE | México | |
| SYMONDS STREET | Cone of AUCKLAND FIELD | New Zealand | |
| SYNI [SINI] | Cone of UDOKAN PLATEAU | Russia (southeastern) | |
| SYOWA-IWO-ZIMA [SHOWA-IWO-JIMA] | Dome of KIKAI | Ryukyu Islands & Kyushu | |
| SYOWA-SINZAN [SHOWA-SHINZAN] | Dome of USU | Hokkaido | |
| SYOZI-YAMA [SHOJI-YAMA] | Dome of OSORE-YAMA | Honshu | |
| SYRDRI RAUDAMELSKULA | Cone of LJOSUFJOLL | Iceland (western) | |
| SYRFELLSHRAUN | Crater Row of REYKJANES | Iceland (southwestern) | |
| SYRKHISSAR | Dome of KASBEK | Caucasus, Georgia & Armenia | |
| SYURADO [SHURADO] | Crater of NARUGO | Honshu | |
| SZIWAN, DJEBEL | Synonym of TAIR, JEBEL AT | Africa (northeastern) & Red Sea | |
| TA-I-SHAN [DAYISHAN] | Cone of LONGGANG GROUP | China (eastern) | |
| TA-KU-SHAN-TZU [DAYISHAN] | Cone of LONGGANG GROUP | China (eastern) | |
| TA-LUNG-WAN [DALONGWAN] | Maar of LONGGANG GROUP | China (eastern) | |
| TA-TUNG | Synonym of TATUN GROUP | Taiwan | |
| TA-YEN-CHIH-FENG [DAYANZHIFENG] | Cone of CHANGBAISHAN | China (eastern) | |
| TAAL | Caldera | Historical | Luzon |
| TAAPACA | Complex volcano | Radiocarbon | Northern Chile, Bolivia & Argentina |
| TABABARA | Dome of CHACHIMBIRO | Ecuador | |
| TABAC, MT. | Stratovolcano of QUALIBOU | West Indies | |
| TABAQUILLO | Lava cone of CHICHINAUTZIN | México | |
| TABARO, MT. | Vent of TAAL | Luzon | |
| TABASHINE-YAMA | Synonym of ZAO | Honshu | |
| TABERNACLE HILL | Tuff cone of BLACK ROCK DESERT | USA (Utah) | |
| TABLAS, CERRO | Cinder cone of SINGUIL, CERRO | El Salvador & Honduras | |
| TABLE DE L'INSTITUT | Pleistocene caldera of KERGUELEN ISLANDS | Indian Ocean (southern) | |
| TABLE MT. CRATER | Crater of SANTA CRUZ | Galápagos Islands | |
| TABLE PEAK | Cone of ZUBAIR, JEBEL | Africa (northeastern) & Red Sea | |
| TABLE VENT | Thermal Feature of CLEFT SEGMENT | Pacific Ocean (northern) | |
| TABLE, THE | Tuya of GARIBALDI LAKE | Canada | |
| TABON-TABON, MT. | Stratovolcano of BULUSAN | Luzon | |
| TABONAL NEGRO | Dome of TENERIFE | Canary Islands | |
| TABONAL, EL | Cone of TENERIFE | Canary Islands | |
| TABOR, MONTE | Dome of ISCHIA | Italy | |
| TABURETE | Stratovolcano | Holocene? | El Salvador & Honduras |
| TABURIENTE, CALDERA DE | Stratovolcano of LA PALMA | Canary Islands | |
| TABUTERA | Stratovolcano of NORTH VATE | Vanuatu | |
| TACANA | Stratovolcano | Historical | México |
| TACANDE | Cinder cone of LA PALMA | Canary Islands | |
| TACANISTES, CERRO | Cone of PILAS, LAS | Nicaragua | |
| TACHIBANA | Crater of KUTTARA | Hokkaido | |
| TACHIBANA HOT SPRINGS | Thermal Feature of KUSATSU-SHIRANE | Honshu | |
| TACHIPEGUE, CERRO | Cone of SINGUIL, CERRO | El Salvador & Honduras | |
| TACO ARRIBA, CERRITO DE | Lava cone of CHIQUIMULA VOLCANIC FIELD | Guatemala | |
| TACO, MONTANA DE | Cone of TENERIFE | Canary Islands | |
| TACOMA, MT. (TACOMAN) | Synonym of RAINIER | USA (Washington) | |
| TACORA | Stratovolcano | Fumarolic | Northern Chile, Bolivia & Argentina |
| TADEKHO HILL | Cone of SPECTRUM RANGE | Canada | |
| TAFADEK | Thermal Feature of TODRA VOLCANIC FIELD | Africa (northern) | |
| TAFAHI | Stratovolcano | Holocene? | Tonga Islands |
| TAFIRA, MONTANA | Cone of GRAN CANARIA | Canary Islands | |
| TAFTAN | Stratovolcano | Holocene | Iran & Afghanistan |
| TAFUA UPOLU | Cinder cone of UPOLU | Samoan & Wallis Islands | |
| TAGA | Stratovolcano of IZU-TOBU | Honshu | |
| TAGABO HILLS | Synonym of KUTUM VOLCANIC FIELD | Africa (northern) | |
| TAGHUM BUTTE | Cone of NEWBERRY | USA (Oregon) | |
| TAGIRI | Cone of SAKURA-JIMA | Ryukyu Islands & Kyushu | |
| TAGLABUNGA [TALABUNGA] | Shield volcano of FREMRINAMUR | Iceland (northeastern) | |
| TAGLGIGAHRAUN | Fissure vent of HEKLA | Iceland (southern) | |
| TAGOTALA | Cone of SAVAI'I | Samoan & Wallis Islands | |
| TAGUS | Tuff cone of DARWIN | Galápagos Islands | |
| TAHALRA VOLCANIC FIELD | Pyroclastic cones | Holocene | Africa (northern) |
| TAHE | Cone of TAMBORA | Lesser Sunda Islands | |
| TAHEKE | Thermal Feature of ROTORUA | New Zealand | |
| TAHOMA PEAK | Former dome of BOGOSLOF | Aleutian Islands | |
| TAHONELATCLAH | Synonym of ST. HELENS | USA (Washington) | |
| TAHORANUI | Cone of KAIKOHE-BAY OF ISLANDS | New Zealand | |
| TAHUAL | Stratovolcano | Holocene | Guatemala |
| TAHUAL, VOLCAN | Stratovolcano of SUCHITAN | Guatemala | |
| TAHUNATARA | Dome of TAUPO | New Zealand | |
| TAHUYA | Cinder cone of LA PALMA | Canary Islands | |
| TAIHEI-ZAN | Dome of TSURUMI | Ryukyu Islands & Kyushu | |
| TAIHEI-ZAN | Dome of SANBE | Honshu | |
| TAIR, JEBEL AT | Stratovolcano | Historical | Africa (northeastern) & Red Sea |
| TAIRAGA-DAKE | Stratovolcano of TOKACHI | Hokkaido | |
| TAIROIKE [FURUMIO] | Maar of MIYAKE-JIMA | Izu, Volcano, & Mariana Islands | |
| TAISEN-MINAMI | Dome of KUJU | Ryukyu Islands & Kyushu | |
| TAISEN-ZAN | Cone of KUJU | Ryukyu Islands & Kyushu | |
| TAISETSU-ZAN | Synonym of DAISETSU | Hokkaido | |
| TAISHO | Crater of YAKE-DAKE | Honshu | |
| TAISHO-KAKO | Crater of TOKACHI | Hokkaido | |
| TAISYO-KAKO [TAISHO-KAKO] | Crater of TOKACHI | Hokkaido | |
| TAITO'ELAU | Cone of UPOLU | Samoan & Wallis Islands | |
| TAJO, CERRO EL | Vent of PRIMAVERA, SIERRA LA | México | |
| TAJUMULCO | Stratovolcano | Holocene | Guatemala |
| TAKA-DAKE | Stratovolcano of ASO | Ryukyu Islands & Kyushu | |
| TAKA-YAMA | Cone of FUJI | Honshu | |
| TAKA-YAMA | Cone of AZUMA | Honshu | |
| TAKA-YAMA | Synonym of ZAO | Honshu | |
| TAKACHIHO-MINE | Stratovolcano of KIRISHIMA | Ryukyu Islands & Kyushu | |
| TAKADO-YAMA | Dome of KOZU-SHIMA | Izu, Volcano, & Mariana Islands | |
| TAKADOMORI | Stratovolcano of KUCHINOERABU-JIMA | Ryukyu Islands & Kyushu | |
| TAKAHACHI-YAMA | Cone of FUJI | Honshu | |
| TAKAHARA | Stratovolcano | Holocene | Honshu |
| TAKAHARA | Thermal Feature of DAISETSU | Hokkaido | |
| TAKAHE | Shield volcano | Ice Core | Antarctica & South Sandwich Islands |
| TAKAHINATA | Dome of ONIKOBE | Honshu | |
| TAKAHIRA-YAMA | Cone of TSURUMI | Ryukyu Islands & Kyushu | |
| TAKAIWA-YAMA | Dome of UNZEN | Ryukyu Islands & Kyushu | |
| TAKAMAKA, PITON | Cinder cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| TAKAMURO-YAMA | Cone of IZU-TOBU | Honshu | |
| TAKANE-SHO | Cone of BAYONNAISE ROCKS | Izu, Volcano, & Mariana Islands | |
| TAKANOOBANE | Cone of ASO | Ryukyu Islands & Kyushu | |
| TAKANOSU | Dome of KUJU | Ryukyu Islands & Kyushu | |
| TAKASHI-YAMA | Synonym of FUJI | Honshu | |
| TAKATIHO-MINE [TAKACHIHO-MINE] | Stratovolcano of KIRISHIMA | Ryukyu Islands & Kyushu | |
| TAKATSUKA-YAMA | Cinder cone of IZU-TOBU | Honshu | |
| TAKAWANGHA | Stratovolcano | Radiocarbon | Aleutian Islands |
| TAKAYU | Dome of AZUMA | Honshu | |
| TAKE-YAMA | Dome of IBUSUKI VOLCANIC FIELD | Ryukyu Islands & Kyushu | |
| TAKEFJELLET | Dome of JAN MAYEN | Atlantic Ocean (Jan Mayen) | |
| TAKENOHIRA | Cone of OSHIMA | Izu, Volcano, & Mariana Islands | |
| TAKENOYU | Thermal Feature of KUJU | Ryukyu Islands & Kyushu | |
| TAKETOMI | Crater of ALAID | Kuril Islands | |
| TAKETORI-YAMA | Synonym of FUJI | Honshu | |
| TAKEURA | Stratovolcano of KUTTARA | Hokkaido | |
| TAKIT | Synonym of MALINAO | Luzon | |
| TAKOU | Cone of KAIKOHE-BAY OF ISLANDS | New Zealand | |
| TAKUAN GROUP | Volcanic complex | Holocene | Bougainville & Solomon Islands |
| TAKUMI-YAMA | Cone of OKI-DOGO | Honshu | |
| TALA | Synonym of DUKONO | Halmahera | |
| TALA | Dome of NATIB | Luzon | |
| TALABUNGA | Shield volcano of FREMRINAMUR | Iceland (northeastern) | |
| TALAGABODAS | Stratovolcano | Fumarolic | Java |
| TALAKMAU | Complex volcano | Holocene | Sumatra |
| TALAMAU | Synonym of TALAKMAU | Sumatra | |
| TALANG | Stratovolcano | Historical | Sumatra |
| TALANG, DANAU | Crater of TALANG | Sumatra | |
| TALAO, VUTI | Cone of AOBA | Vanuatu | |
| TALASEA GOVERNMENT STATION | Thermal Feature of GARUA HARBOUR | New Britain | |
| TALASEA HARBOUR | Synonym of GARUA HARBOUR | New Britain | |
| TALATAK | Dome of BULUSAN | Luzon | |
| TALAWE, MOUNT | Stratovolcano of LANGILA | New Britain | |
| TALAYA GROUP | Cone of TUNKIN DEPRESSION | Russia (southeastern) | |
| TALBOT BANK | Submarine vent of CAMPI FLEGREI MAR SICILIA | Italy | |
| TALIM ISLAND | Stratovolcano of LAGUNA CALDERA | Luzon | |
| TALINES, MT. | Cone of CUERNOS DE NEGROS | Central Philippines | |
| TALIPAO, MT. | Cinder cone of JOLO | Sulu Islands | |
| TALISAY | Caldera of TAAL | Luzon | |
| TALLANG | Synonym of TALANG | Sumatra | |
| TALLEA | Cone of GUFA | Africa (northeastern) & Red Sea | |
| TALO | Stratovolcano of UMBOI | Northeast of New Guinea | |
| TALOLINGA, LOMA | Cinder cone of SAN CRISTOBAL | Nicaragua | |
| TALOPU HOT SPRING | Thermal Feature of SULU RANGE | New Britain | |
| TALPETATE, CERRO | Dome of APOYEQUE | Nicaragua | |
| TALQUIAN [CHICHUJ] | Stratovolcano of TACANA | México | |
| TALUTU, MOUNT | Dome of SULU RANGE | New Britain | |
| TAMA LAKES | Crater of RUAPEHU | New Zealand | |
| TAMACITE, MONTANA | Cone of FUERTEVENTURA | Canary Islands | |
| TAMAGASTEPEC [TAMAGES] | Cone of SANTA ANA | El Salvador & Honduras | |
| TAMAGAWA SPA | Thermal Feature of AKITA-YAKE-YAMA | Honshu | |
| TAMAGES | Cone of SANTA ANA | El Salvador & Honduras | |
| TAMAMI | Synonym of TINAKULA | Santa Cruz Islands | |
| TAMAN GEDANG | Crater of KUNYIT | Sumatra | |
| TAMAN SAAT | Crater of PATUHA | Java | |
| TAMAN, KAWAH | Thermal Feature of PERBAKTI-GAGAK | Java | |
| TAMANHIDUP | Crater of IYANG-ARGAPURA | Java | |
| TAMANKERING | Crater of IYANG-ARGAPURA | Java | |
| TAMANKRING | Cone of IYANG-ARGAPURA | Java | |
| TAMANO-IKE | Crater of CHOKAI | Honshu | |
| TAMANSARI GROUP | Crater of BATUR | Lesser Sunda Islands | |
| TAMARII SEAMOUNT | Synonym of MACDONALD | Pacific Ocean (central) | |
| TAMBO QUEMADO | Pyroclastic shield | Holocene | Northern Chile, Bolivia & Argentina |
| TAMBORA | Stratovolcano | Historical | Lesser Sunda Islands |
| TAMBUNARAKWE, VITI | Cone of AOBA | Vanuatu | |
| TAMERTIOU, TARSO | Cone of TOUSSIDE, TARSO | Africa (northern) | |
| TAMIA, MONTANA | Cone of LANZAROTE | Canary Islands | |
| TAMLANG, MT. | Cone of SAN PABLO VOLCANIC FIELD | Luzon | |
| TAMOJANG [TAMOYANG] | Crater of SIRUNG | Lesser Sunda Islands | |
| TAMOYANG | Crater of SIRUNG | Lesser Sunda Islands | |
| TAMPAD | Cone of MATUTUM | Mindanao | |
| TAMPOMAS | Stratovolcano | Holocene | Java |
| TAMPUSU [TOMPUSU] | Cone of TONDANO CALDERA | Sulawesi | |
| TANA | Synonym of YASUR | Vanuatu | |
| TANA | Stratovolcanoes | Holocene | Aleutian Islands |
| TANAGA | Stratovolcanoes | Historical | Aleutian Islands |
| TANAH LAPANG | Crater of DUKONO | Halmahera | |
| TANAK-ANGUNAK | Synonym of CARLISLE | Aleutian Islands | |
| TANCITARO, VOLCAN | Stratovolcano of MICHOACAN-GUANAJUATO | México | |
| TANDIC | Dome of LEONARD RANGE | Mindanao | |
| TANDIKAI | Synonym of TANDIKAT | Sumatra | |
| TANDIKAT | Stratovolcanoes | Historical | Sumatra |
| TANDUKBENUA, DOLOK | Cone of TOBA | Sumatra | |
| TANDUREK | Synonym of TENDUREK DAGI | Turkey | |
| TANEMAKISHIRO | Crater of IWAKI | Honshu | |
| TANEMAKISIRO [TANEMAKISHIRO] | Crater of IWAKI | Honshu | |
| TANG-SHUI-CHANG | Thermal Feature of CHANGBAISHAN | China (eastern) | |
| TANGA | Stratovolcano | Pleistocene-Hot Springs | New Ireland |
| TANGANASOGA | Cinder cone of HIERRO | Canary Islands | |
| TANGANO | Shield volcano of NGOZI | Africa (eastern) | |
| TANGAROA | Submarine volcano | Fumarolic | New Zealand |
| TANGAROA, MAUNGA | Pyroclastic Cone of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| TANGKOEBAN PRAHOE | Synonym of TANGKUBANPARAHU | Java | |
| TANGKOKO | Synonym of TONGKOKO | Sulawesi | |
| TANGKUBAN PARAHU | Synonym of TANGKUBANPARAHU | Java | |
| TANGKUBAN PERAHU | Synonym of TANGKUBANPARAHU | Java | |
| TANGKUBANPARAHU | Stratovolcano | Historical | Java |
| TANGLUP, MOUNT | Cone of UMBOI | Northeast of New Guinea | |
| TANGUERRES | Synonym of AZUFRAL | Colombia | |
| TANGUES, PITON | Cinder cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| TANGUNA | Dome of CHACHIMBIRO | Ecuador | |
| TANGWANGI, VUTI | Cone of AOBA | Vanuatu | |
| TANJUNG TIRAMANA | Thermal Feature of PALUWEH | Lesser Sunda Islands | |
| TANK FARM | Tuff ring of AUCKLAND FIELD | New Zealand | |
| TANNA | Synonym of YASUR | Vanuatu | |
| TANODOUREK | Synonym of TENDUREK DAGI | Turkey | |
| TANSEI | Dome of NANTAI | Honshu | |
| TAO, VOLCAN DE | Cone of LANZAROTE | Canary Islands | |
| TAO-RUSYR CALDERA | Stratovolcano | Historical | Kuril Islands |
| TAPAHORO | Dome of OKATAINA | New Zealand | |
| TAPAK | Stratovolcano of BRATAN | Lesser Sunda Islands | |
| TAPEIXTE, CERRO | Cinder cone of CHICHINAUTZIN | México | |
| TAPIRAG, MT. | Synonym of FOURPEAKED | Alaska Peninsula | |
| TAPU'ELE'ELE | Cone of SAVAI'I | Samoan & Wallis Islands | |
| TAPUNGHO | Dome of PINATUBO | Luzon | |
| TAPUNIKANDI, VUTI | Cone of AOBA | Vanuatu | |
| TAPUTAPU | Shield volcano of TUTUILA | Samoan & Wallis Islands | |
| TAR RIVER SOUFRIERE | Thermal Feature of SOUFRIERE HILLS | West Indies | |
| TAR, DJEBEL | Synonym of TAIR, JEBEL AT | Africa (northeastern) & Red Sea | |
| TARA, BATOE | Synonym of TARA, BATU | Lesser Sunda Islands | |
| TARA, BATU | Stratovolcano | Historical | Lesser Sunda Islands |
| TARAKAN | Pyroclastic cones | Holocene | Halmahera |
| TARAKAN ITJI | Cone of TARAKAN | Halmahera | |
| TARAKAN LAMO | Cone of TARAKAN | Halmahera | |
| TARANAKI [EGMONT] | Stratovolcano | Historical | New Zealand |
| TARASCAN VOLC FIELD | Synonym of MICHOACAN-GUANAJUATO | México | |
| TARATIMI | Tuff ring of MAYOR ISLAND | New Zealand | |
| TARAWERA | Fissure vent of OKATAINA | New Zealand | |
| TARDARFJOLL | Crater Row of KRISUVIK | Iceland (southwestern) | |
| TAREWAKOURA | Dome of MAYOR ISLAND | New Zealand | |
| TARI | Pyroclastic Cone of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| TARIAT VOLC FIELD | Synonym of TARYATU-CHULUTU | Mongolia | |
| TARIAT-CHOLOOT | Synonym of TARYATU-CHULUTU | Mongolia | |
| TARO | Dome of OMANAGO GROUP | Honshu | |
| TAROEB [TARUB] | Stratovolcano of LAMONGAN | Java | |
| TAROKA GROUP | Cone of LOLORU | Bougainville & Solomon Islands | |
| TARSO | See proper name (e.g. VOON, TARSO) | Chad term for MOUNTAIN | |
| TARTARET | Cone of CHAINE DES PUYS | Western Europe | |
| TARUB | Stratovolcano of LAMONGAN | Java | |
| TARUCUN, CERRO | Cinder cone of MICHOACAN-GUANAJUATO | México | |
| TARUGO CORRAL | Dome of CAYAMBE | Ecuador | |
| TARUKI-HIGASHI | Dome of UNZEN | Ryukyu Islands & Kyushu | |
| TARUMAI | Stratovolcano of SHIKOTSU | Hokkaido | |
| TARUTAMA | Thermal Feature of ASO | Ryukyu Islands & Kyushu | |
| TARYATU-CHULUTU | Volcanic field | Radiocarbon | Mongolia |
| TASHATS-SAR | Cone of GHEGAM RIDGE | Caucasus, Georgia & Armenia | |
| TASKESIK TEPE | Dome of ACIGOL-NEVSEHIR | Turkey | |
| TASOVI, VUSI | Cone of AOBA | Vanuatu | |
| TAT ALI | Shield volcano | Holocene | Africa (northeastern) & Red Sea |
| TATA SABAYA | Stratovolcano | Holocene | Northern Chile, Bolivia & Argentina |
| TATARA | Shield volcano of SAN PEDRO-PELLADO | Central Chile & Argentina | |
| TATARA-SAN PEDRO | Synonym of SAN PEDRO-PELLADO | Central Chile & Argentina | |
| TATARINOV | Stratovolcano of CHIKURACHKI | Kuril Islands | |
| TATARIWAN | Cone of LOKON-EMPUNG | Sulawesi | |
| TATCHU-SAN | Dome of KUJU | Ryukyu Islands & Kyushu | |
| TATE-YAMA | Stratovolcano | Historical | Honshu |
| TATESHINA-YAMA | Stratovolcano of KITA YATSUGA-TAKE | Honshu | |
| TATIO, EL | Hydrothermal field | Pleistocene-Geysers | Northern Chile, Bolivia & Argentina |
| TATODOMJI | Cone of TOUSSIDE, TARSO | Africa (northern) | |
| TATUN GROUP | Stratovolcanoes | Pleistocene-Fumarolic | Taiwan |
| TA'U | Shield volcano | Holocene | Samoan & Wallis Islands |
| TAU | Dome of TUTUILA | Samoan & Wallis Islands | |
| TAUANUI | Cone of KAIKOHE-BAY OF ISLANDS | New Zealand | |
| TAUGA POINT | Tuff cone of OFU-OLOSEGA | Samoan & Wallis Islands | |
| TAUHARA | Dome of TAUPO | New Zealand | |
| TAUHARA-TAUPO | Thermal Feature of TAUPO | New Zealand | |
| TAULEVU | Cone of TAVEUNI | Fiji Islands | |
| TAUNGBYAUK | Crater of LOWER CHINDWIN | Southeast Asia | |
| TAUNGGALA | Cone of POPA | Southeast Asia | |
| TAUNSHITS | Stratovolcano | Radiocarbon | Kamchatka Peninsula |
| TAUPE, PUY DE LA | Cone of CHAINE DES PUYS | Western Europe | |
| TAUPO | Caldera | Radiocarbon | New Zealand |
| TAVAI RURO [TAVANI RURU] | Stratovolcano of KUWAE | Vanuatu | |
| TAVALAPA | Cone of KUWAE | Vanuatu | |
| TAVANI | See proper name (e.g. KUTALI, TAVANI) | Melanesian word for MOUNTAIN | |
| TAVEUNI | Shield volcano | Radiocarbon | Fiji Islands |
| TAVOKA | Thermal Feature of SAVO | Bougainville & Solomon Islands | |
| TAVUI | Caldera | Radiocarbon | New Britain |
| TAVURVUR | Stratovolcano of RABAUL | New Britain | |
| TAVUYANGA | Cone of TAVEUNI | Fiji Islands | |
| TAWEH HOT SPRINGS | Thermal Feature of EDZIZA | Canada | |
| TAY-IN-SHAN [DAYINGSHAN] | Stratovolcano of TENGCHONG | Southeast Asia | |
| TAYAWAN | Pleistocene caldera of PINATUBO | Luzon | |
| TAYGETE CONE | Dome of PLEIADES, THE | Antarctica & South Sandwich Islands | |
| TAYIR, DJEBEL | Synonym of TAIR, JEBEL AT | Africa (northeastern) & Red Sea | |
| TAYLORS HILL | Cone of AUCKLAND FIELD | New Zealand | |
| TAYR, JABAL AL | Synonym of TAIR, JEBEL AT | Africa (northeastern) & Red Sea | |
| TAZA, CERRO LA | Cinder cone of MICHOACAN-GUANAJUATO | México | |
| TAZA, CERRO LA | Cinder cone of CARRAN-LOS VENADOS | Central Chile & Argentina | |
| TAZA, LA | Cone of ANTILLANCA GROUP | Central Chile & Argentina | |
| TAZENAT | Maar of CHAINE DES PUYS | Western Europe | |
| TAZUMAL, CERRITO DE | Cinder cone of SINGUIL, CERRO | El Salvador & Honduras | |
| TCHEGULACH | Synonym of CHAGULAK | Aleutian Islands | |
| TCHOBBE | Synonym of CORBETTI CALDERA | Africa (northeastern) & Red Sea | |
| TE AHUAHU | Cone of KAIKOHE-BAY OF ISLANDS | New Zealand | |
| TE ANANUI | Tuff ring of MAYOR ISLAND | New Zealand | |
| TE ARAAKA | Tuff ring of MAYOR ISLAND | New Zealand | |
| TE HAEHAENGA | Thermal Feature of OKATAINA | New Zealand | |
| TE HAPEOTOROA | Dome of OKATAINA | New Zealand | |
| TE HOATA | Thermal Feature of TAUPO | New Zealand | |
| TE HORO | Tuff ring of MAYOR ISLAND | New Zealand | |
| TE HOROA | Dome of OKATAINA | New Zealand | |
| TE KAHU REA, MAUNGA | Pyroclastic Cone of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| TE KAUHANGA, MAUNGA | Pyroclastic Cone of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| TE KOPIA | Thermal Feature of OKATAINA | New Zealand | |
| TE KUKUTA | Vent of MAYOR ISLAND | New Zealand | |
| TE KUMETE | Dome of OKATAINA | New Zealand | |
| TE MAARI [TE MARI] | Crater of TONGARIRO | New Zealand | |
| TE MANAVAI | Crater of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| TE MANAVAI | Crater of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| TE MARI | Crater of TONGARIRO | New Zealand | |
| TE PARITU | Vent of MAYOR ISLAND | New Zealand | |
| TE PENE | Cone of KAIKOHE-BAY OF ISLANDS | New Zealand | |
| TE PUHA ROA, MAUNGA | Pyroclastic Cone of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| TE PUKE | Cone of KAIKOHE-BAY OF ISLANDS | New Zealand | |
| TE PUPU | Thermal Feature of TAUPO | New Zealand | |
| TE TERATA | Dome of MAROA | New Zealand | |
| TE WHAU | Cone of KAIKOHE-BAY OF ISLANDS | New Zealand | |
| TE WHEKAU | Crater of OKATAINA | New Zealand | |
| TEA-TEA, MAUNGA | Dome of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| TEAHITIA | Submarine volcano | Seismicity | Pacific Ocean (central) |
| TEAU | Synonym of TEON | Banda Sea | |
| TEBEL HEBEISH | Crater of BAYUDA VOLCANIC FIELD | Africa (northern) | |
| TEBEL QUREIN | Cone of BAYUDA VOLCANIC FIELD | Africa (northern) | |
| TEBENKOV | Stratovolcano of GROZNY GROUP | Kuril Islands | |
| TECAPA | Stratovolcano | Holocene | El Salvador & Honduras |
| TECAPA-LAGUNA DE ALEGRIA | Cone of TECAPA | El Salvador & Honduras | |
| TECOLOTE | Cinder cone of PINACATE | México | |
| TECOLOTE, CERRO | Cinder cone of MOYUTA | Guatemala | |
| TECOLUCA, CERRO | Dome of ILOPANGO | El Salvador & Honduras | |
| TECOMATE, CERRO | Dome of MASCOTA VOLCANIC FIELD | México | |
| TECOMATEPE, CERRO | Stratovolcano of GUAZAPA | El Salvador & Honduras | |
| TECONTO | Cinder cone of CHICHINAUTZIN | México | |
| TECUAMBURRO | Stratovolcano | Radiocarbon | Guatemala |
| TECUAN, CERRO | Lava cone of SAN DIEGO | El Salvador & Honduras | |
| TECUAN, CERRO | Stratovolcano of CINOTEPEQUE, CERRO | El Salvador & Honduras | |
| TECUITLAPA | Maar of SERDAN-ORIENTAL | México | |
| TECUN UMAN, CERRO | Dome of ALMOLONGA | Guatemala | |
| TE'ELAGI | Cone of SAVAI'I | Samoan & Wallis Islands | |
| TEER, GEBEL | Synonym of TAIR, JEBEL AT | Africa (northeastern) & Red Sea | |
| TEETERS NUNATAK | Stratovolcano of HUDSON MOUNTAINS | Antarctica & South Sandwich Islands | |
| TEEUW | Synonym of TEON | Banda Sea | |
| TEIDE, PICO DEL | Stratovolcano of TENERIFE | Canary Islands | |
| TEIR, DJEBEL | Synonym of TAIR, JEBEL AT | Africa (northeastern) & Red Sea | |
| TEISHI KNOLL [TEISHI KAIKYU] | Submarine vent of IZU-TOBU | Honshu | |
| TEISHI-KAIKYU | Submarine vent of IZU-TOBU | Honshu | |
| TEIXCAL [SAN MARCELINO] | Cinder cone of SANTA ANA | El Salvador & Honduras | |
| TEKAI | Synonym of CHOKAI | Honshu | |
| TEL AVITAL | Cinder cone of GOLAN HEIGHTS | Syria | |
| TEL BENTAL | Cinder cone of GOLAN HEIGHTS | Syria | |
| TELAGABODAS | Synonym of TALAGABODAS | Java | |
| TELAGAKUNING | Crater of LAWU | Java | |
| TELAGARANU | Synonym of TODOKO-RANU | Halmahera | |
| TELAGAWARU | Crater of IJEN | Java | |
| TELCAMPANA | Cinder cone of COLIMA | México | |
| TELEKI'S CONE | Cone of BARRIER, THE | Africa (eastern) | |
| TELEMOJO | Synonym of TELOMOYO | Java | |
| TELICA | Stratovolcanoes | Historical | Nicaragua |
| TELOGO KETJIL [TELOGOKECIL] | Crater of DAUN, BUKIT | Sumatra | |
| TELOGOKECIL | Crater of DAUN, BUKIT | Sumatra | |
| TELOGOPASIR | Crater of DIENG VOLCANIC COMPLEX | Java | |
| TELOGOTERUS | Thermal Feature of DIENG VOLCANIC COMPLEX | Java | |
| TELOGOWURO | Crater of LAWU | Java | |
| TELOMOJO | Synonym of TELOMOYO | Java | |
| TELOMOYO | Stratovolcano | Holocene | Java |
| TELON | Dome of MURIA | Java | |
| TELONG, BUR NI | Stratovolcano | Historical | Sumatra |
| TELORI | Crater of DUKONO | Halmahera | |
| TEMBARGENA, MONTANA | Cinder cone of HIERRO | Canary Islands | |
| TEMBERGENA | Cinder cone of HIERRO | Canary Islands | |
| TEMEREJEQUE, MONTANA | Cone of FUERTEVENTURA | Canary Islands | |
| TEMPANG | Cone of TONDANO CALDERA | Sulawesi | |
| TEMPASO [TEMPANG] | Cone of TONDANO CALDERA | Sulawesi | |
| TEMPISQUE, CERRO | Dome of IPALA | Guatemala | |
| TENACA, MONTANA | Cinder cone of HIERRO | Canary Islands | |
| TENANGO [CERRO TETEPETL] | Lava cone of CHICHINAUTZIN | México | |
| TENAS PEAK | Cinder cone of CINNAMON BUTTE | USA (Oregon) | |
| TENAYO, CERRO | Cinder cone of CHICHINAUTZIN | México | |
| TENBO-SAN | Dome of SHIKARIBETSU GROUP | Hokkaido | |
| TENCHUN | Synonym of TENGCHONG | Southeast Asia | |
| TENDUREK DAG | Synonym of TENDUREK DAGI | Turkey | |
| TENDUREK DAGI | Shield volcano | Historical | Turkey |
| TENDURUK DAGI | Synonym of TENDUREK DAGI | Turkey | |
| TENDURUK GOLU | Crater of TENDUREK DAGI | Turkey | |
| TENEGUIA | Cinder cone of LA PALMA | Canary Islands | |
| TENERIFE | Stratovolcano | Historical | Canary Islands |
| TENERIFE, MONTANA | Cinder cone of HIERRO | Canary Islands | |
| TENESEDRA, MONTANA | Cinder cone of HIERRO | Canary Islands | |
| TENG-CHIA-WANG [TENGJIAWANGSHAN] | Cone of LONGGANG GROUP | China (eastern) | |
| TENG-YUEH | Synonym of TENGCHONG | Southeast Asia | |
| TENGA, KEPUNDAN [VERBEEK] | Crater of MARAPI | Sumatra | |
| TENGCHONG | Pyroclastic cones | Uranium-series | Southeast Asia |
| TENGGER CALDERA | Stratovolcanoes | Historical | Java |
| TENGJIAWANGSHAN | Cone of LONGGANG GROUP | China (eastern) | |
| TENGU-DAKE | Stratovolcano of NIPESOTSU-MARUYAMA | Hokkaido | |
| TENGU-YAMA | Dome of TATE-YAMA | Honshu | |
| TENJIN-YAMA | Cone of FUJI | Honshu | |
| TENJO-SAN | Dome of KOZU-SHIMA | Izu, Volcano, & Mariana Islands | |
| TENNENA | Cone of EDZIZA | Canada | |
| TENORIO | Stratovolcanoes | Holocene | Costa Rica |
| TENSHI | Stratovolcano of IZU-TOBU | Honshu | |
| TENUSSET, PUY DE | Cone of CHAINE DES PUYS | Western Europe | |
| TENZYO-SAN [TENJO-SAN] | Dome of KOZU-SHIMA | Izu, Volcano, & Mariana Islands | |
| TEODORO WOLF, ISLA | Dome of CUICOCHA | Ecuador | |
| TEON | Stratovolcano | Historical | Banda Sea |
| TEOU | Synonym of TEON | Banda Sea | |
| TEPECIK TEPE | Cone of ERCIYES DAGI | Turkey | |
| TEPECINGO | Cone of CHICHINAUTZIN | México | |
| TEPESIDELIK DAMLARU | Vent of ERCIYES DAGI | Turkey | |
| TEPETL | Cinder cone of CHICHINAUTZIN | México | |
| TEPETLAPAN | Cinder cone of CHICHINAUTZIN | México | |
| TEPEXITL, CERRO | Tuff ring of SERDAN-ORIENTAL | México | |
| TEPEZINGO | Cinder cone of CHICHINAUTZIN | México | |
| TEPI | Shield volcano | Holocene | Africa (northeastern) & Red Sea |
| TER, DJEBEL | Synonym of TAIR, JEBEL AT | Africa (northeastern) & Red Sea | |
| TERBANG, GUNUNG | Cone of SLAMET | Java | |
| TERCEIRA | Stratovolcanoes | Historical | Azores |
| TERESA | Dome of LEONARD RANGE | Mindanao | |
| TEREVAKA, MAUNGA | Shield volcano of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| TERMAS | See proper name (e.g. COPAHUE, TERMAS DE) | Spanish for SPA | |
| TERMAS | Thermal Feature of CHILLAN, NEVADOS DE | Central Chile & Argentina | |
| TERMAS, LAS | Stratovolcano of CHILLAN, NEVADOS DE | Central Chile & Argentina | |
| TERMINAL GEYSER | Thermal Feature of LASSEN VOLCANIC CENTER | USA (California) | |
| TERMOPILAS, LAS | Thermal Feature of APANECA RANGE | El Salvador & Honduras | |
| TERNATE | Synonym of GAMALAMA | Halmahera | |
| TERPUK | Shield volcano | Radiocarbon | Kamchatka Peninsula |
| TERRA MURATA | Tuff ring of CAMPI FLEGREI | Italy | |
| TERRACE | Crater of BLACK ROCK DESERT | USA (Utah) | |
| TERRANG, LAKE | Tuff ring of NEWER VOLCANICS PROV | Australia | |
| TERRE BLANCHE | Dome of QUALIBOU | West Indies | |
| TERRE ELM [SULFUR SPRINGS] | Thermal Feature of PLAT PAYS, MORNE | West Indies | |
| TERRIBILE BANK | Submarine vent of CAMPI FLEGREI MAR SICILIA | Italy | |
| TERROR, EL | Cone of ZAPATERA | Nicaragua | |
| TESKI GROUP | Crater of OSORNO | Southern Chile & Argentina | |
| TESORO | Cinder cone of HIERRO | Canary Islands | |
| TESTACCIO | Crater of ISCHIA | Italy | |
| TETA, LOMA LA | Dome of SAN CRISTOBAL | Nicaragua | |
| TETECON | Cone of CHICHINAUTZIN | México | |
| TETELTZINGO | Crater of ORIZABA, PICO DE | México | |
| TETEQUILLO | Lava cone of CHICHINAUTZIN | México | |
| TETERA, CERRO [LA TETRA] | Cone of ZUNI-BANDERA | USA (New Mexico) | |
| TETIDE | Submarine vent of CAMPI FLEGREI MAR SICILIA | Italy | |
| TETILLAS, LAS | Cinder cone of GLORIA, LA | México | |
| TETRA, LA | Cone of ZUNI-BANDERA | USA (New Mexico) | |
| TETSU-ZAN | Stratovolcano of ADATARA | Honshu | |
| TETU-ZAN [TETSU-ZAN] | Stratovolcano of ADATARA | Honshu | |
| TETYAEV | Cone of DZENZURSKY | Kamchatka Peninsula | |
| TETÉPETL, CERRO | Lava cone of CHICHINAUTZIN | México | |
| TEUCTEPETL | Synonym of ORIZABA, PICO DE | México | |
| TEUFELSNADEL [DEVIL'S NEEDLE] | Vent of LENGAI, OL DOINYO | Africa (eastern) | |
| TEUHTLI, VOLCAN | Shield volcano of CHICHINAUTZIN | México | |
| TEUN | Synonym of TEON | Banda Sea | |
| TEUPIN IBOIH | Thermal Feature of PULAU WEH | Sumatra | |
| TEUPIN KRUENG MADUN | Thermal Feature of PULAU WEH | Sumatra | |
| TEUTLI, VOLCAN [VOLCAN TEUHTLI} | Shield volcano of CHICHINAUTZIN | México | |
| TEXONTEPEC | Lava cone of CHICHINAUTZIN | México | |
| TEYOTL PEAK | Stratovolcano of IZTACCIHUATL | México | |
| TEYR, DJEBEL | Synonym of TAIR, JEBEL AT | Africa (northeastern) & Red Sea | |
| TEZIOLO, CERRO EL | Cone of CHICHINAUTZIN | México | |
| TEZONTAL | Cinder cone of COLIMA | México | |
| TEZONTLE | Cinder cone of CHICHINAUTZIN | México | |
| TEZOYO, CERRO EL | Cone of CHICHINAUTZIN | México | |
| THAIS HILL | Dome of SABA | West Indies | |
| THAW HILL | Cone of SPECTRUM RANGE | Canada | |
| THAZI | Vent of LOWER CHINDWIN | Southeast Asia | |
| THE | See proper name (e.g. FATHER, THE) | ||
| THEISTAREYKIR | Synonym of THEISTAREYKJARBUNGA | Iceland (northeastern) | |
| THEISTAREYKJAHRAUN | Fissure vent of THEISTAREYKJARBUNGA | Iceland (northeastern) | |
| THEISTAREYKJARBUNGA | Shield volcano | Tephrochronology | Iceland (northeastern) |
| THERA | Shield volcano of SANTORINI | Greece | |
| THERA | Shield volcano of SANTORINI | Greece | |
| THERASIA-OIA | Shield volcano of SANTORINI | Greece | |
| THIERRY | Crater of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| THIOLET, PUY | Cone of CHAINE DES PUYS | Western Europe | |
| THIRA | Synonym of SANTORINI | Greece | |
| THIRASIA-OIA [THERASIA-OIA] | Shield volcano of SANTORINI | Greece | |
| THIRSTY POINT | Cinder cone of CINNAMON BUTTE | USA (Oregon) | |
| THJOFAHRAUN | Fissure vent of HENGILL | Iceland (southwestern) | |
| THOLOTHI | Cone of TAVEUNI | Fiji Islands | |
| THOMPSON ISLAND | Submarine volcano ? | Uncertain | Atlantic Ocean (southern) |
| THORDARHYRNA | Stratovolcano of GRIMSVOTN | Iceland (northeastern) | |
| THORSARHRAUN | Fissure vent of BARDARBUNGA | Iceland (northeastern) | |
| THRAINSSKJOLDUR | Shield volcano of REYKJANES | Iceland (southwestern) | |
| THREE KINGS | Tuff ring of AUCKLAND FIELD | New Zealand | |
| THREE SISTERS | Cone of MEDICINE LAKE | USA (California) | |
| THREE SISTERS CONES | Cone of EREBUS | Antarctica & South Sandwich Islands | |
| THREE TRAPPERS | Cinder cone of BACHELOR | USA (Oregon) | |
| THREE-QUARTER CONE | Cone of SEMISOPOCHNOI | Aleutian Islands | |
| THRENGSLABORGIR | Crater Row of KRAFLA | Iceland (northeastern) | |
| THRIDRANGAR | Submarine vent of VESTMANNAEYJAR | Iceland (southern) | |
| THRIHNUKAR | Fissure vent of BRENNISTEINSFJOLL | Iceland (southwestern) | |
| THROSKULDSHRAUN | Crater Row of BARDARBUNGA | Iceland (northeastern) | |
| THULE ISLAND | Submarine vent of THULE ISLANDS | Antarctica & South Sandwich Islands | |
| THULE ISLANDS | Stratovolcanoes | Historical | Antarctica & South Sandwich Islands |
| THUMB, THE | Dome of VICTORY | New Guinea & D'Entrecasteaux Islands | |
| TIANCHI | Caldera of CHANGBAISHAN | China (eastern) | |
| TIANG-SAN PABLO HOT SPRINGS | Thermal Feature of BANAHAW | Luzon | |
| TIANGYANG | Stratovolcano of LEIZHOU BANDAO | Southeast Asia | |
| TIANSHAN VOLCANIC GROUP | Volcanic field | Historical | China (western) |
| TIANTISHAN | Cone of TENGCHONG | Southeast Asia | |
| TIATA IMBABURA | Dome of IMBABURA | Ecuador | |
| TIATALA | Cone of UPOLU | Samoan & Wallis Islands | |
| TIATIA | Stratovolcano | Historical | Kuril Islands |
| TIAU (TIAUW) | Synonym of TEON | Banda Sea | |
| TIAWIR | Dome of NATIB | Luzon | |
| TIBANE | Dome of CAMIGUIN | Mindanao | |
| TIBAS | Stratovolcano of BARVA | Costa Rica | |
| TICAB, LAKE | Maar of BANAHAW | Luzon | |
| TICOMA [TICOMO PIT] | Crater of NEJAPA-MIRAFLORES | Nicaragua | |
| TICOMO PIT | Crater of NEJAPA-MIRAFLORES | Nicaragua | |
| TICSANI | Lava domes | Tephrochronology | Perú |
| TIDICHI, EHI | Synonym of TOUSSIDE, TARSO | Africa (northern) | |
| T'IDO HAYK | Crater of BILATE RIVER FIELD | Africa (northeastern) & Red Sea | |
| TIDORE | Stratovolcano | Holocene | Halmahera |
| TIEGUOSHAN | Cone of TENGCHONG | Southeast Asia | |
| TIEN-CHI [TIANCHI] | Caldera of CHANGBAISHAN | China (eastern) | |
| TIENDILLA | Cone of TURRIALBA | Costa Rica | |
| TIERRA COLORADO, CERRO | Cone of SUCHITAN | Guatemala | |
| TIGALALU | Stratovolcano | Holocene | Halmahera |
| TIGALATE [SAN MARTIN] | Cinder cone of LA PALMA | Canary Islands | |
| TIGHE ROCK | Cone of HUDSON MOUNTAINS | Antarctica & South Sandwich Islands | |
| TIGRE, EL | Stratovolcano | Holocene | El Salvador & Honduras |
| TIGRE, ISLA EL | Stratovolcano | Holocene | El Salvador & Honduras |
| TIHUYA [TAHUYA] | Cinder cone of LA PALMA | Canary Islands | |
| TIIS, KAWAH | Thermal Feature of PATUHA | Java | |
| TIJAW | Synonym of TEON | Banda Sea | |
| TIKITERE | Thermal Feature of ROTORUA | New Zealand | |
| TIKORANGI | Dome of OKATAINA | New Zealand | |
| TIKURA | Synonym of CHIKURACHKI | Kuril Islands | |
| TILAPA | Cone of CHICHINAUTZIN | México | |
| TILAPIA LAKE | Crater of CENTRAL ISLAND | Africa (eastern) | |
| TILHUE, CERRO | Stratovolcano of TROMEN | Central Chile & Argentina | |
| TILING | Crater of LAWU | Java | |
| TILLMAN, MT. | Synonym of WRANGELL | Alaska (eastern) | |
| TILMBEG | Cone of MOTLAV | Vanuatu | |
| TILOCALAR | Stratovolcanoes | Holocene? | Northern Chile, Bolivia & Argentina |
| TILOCALAR NORTE | Stratovolcano of TILOCALAR | Northern Chile, Bolivia & Argentina | |
| TILOCALAR SUR | Stratovolcano of TILOCALAR | Northern Chile, Bolivia & Argentina | |
| TIMANFAYA ANTIGUA | Cone of LANZAROTE | Canary Islands | |
| TIMANFAYA, MONTANAS DEL | Synonym of LANZAROTE | Canary Islands | |
| TIMBANG | Cone of DIENG VOLCANIC COMPLEX | Java | |
| TIMBER CRATER | Shield volcano of CRATER LAKE | USA (Oregon) | |
| TIMBERED CRATER | Tuff ring of BRUSHY BUTTE | USA (California) | |
| TIMBERED PEAK | Cone of WEST CRATER | USA (Washington) | |
| TIMBOROMBO, MONTANA DE | Cinder cone of HIERRO | Canary Islands | |
| TIMI, EHI | Stratovolcano of TOUSSIDE, TARSO | Africa (northern) | |
| TIMPA ROSSA, MONTE | Cinder cone of ETNA | Italy | |
| TIMPONE CARRUBBO | Stratovolcano of LIPARI | Italy | |
| TIMPONE DEL FUOCO | Shield volcano of STROMBOLI | Italy | |
| TIMPONE OSPEDALE | Stratovolcano of LIPARI | Italy | |
| TIMPONE PATASO | Stratovolcano of LIPARI | Italy | |
| TIMPOONG [MAMBAJAO] | Stratovolcano of CAMIGUIN | Mindanao | |
| TIN CAN ISLAND | Synonym of NIUAFO'OU | Tonga Islands | |
| TIN ZAOUATENE VOLCANIC FIELD | Volcanic field | Holocene | Africa (northern) |
| TINAJA DE LOS PAPAGOS [VOLCAN ROMO] | Maar of PINACATE | México | |
| TINAJA, VOLCAN LA | Cone of ZITACUARO-VALLE DE BRAVO | México | |
| TINAJAS, CERRO LAS | Cone of ZITACUARO-VALLE DE BRAVO | México | |
| TINAJAS, ISLA | Tuff ring of ZAPATERA | Nicaragua | |
| TINAJITA, VOLCAN EL | Maar of PINACATE | México | |
| TINAKORO | Synonym of TINAKULA | Santa Cruz Islands | |
| TINAKULA | Stratovolcano | Historical | Santa Cruz Islands |
| TINDAYA, MONTANA | Cone of FUERTEVENTURA | Canary Islands | |
| TINDFJALLAJOKULL | Stratovolcano | Holocene | Iceland (southern) |
| TINDFJOLL | Synonym of TINDFJALLAJOKULL | Iceland (southern) | |
| TINDIMA | Cone of CHYULU HILLS | Africa (eastern) | |
| TINDUR | Dome of KERLINGARFJOLL | Iceland (southwestern) | |
| TINGA, MONTANA DE | Cone of LANZAROTE | Canary Islands | |
| TINGUATON | Crater of LANZAROTE | Canary Islands | |
| TINGUIRIRICA | Stratovolcano | Historical | Central Chile & Argentina |
| TINOR | Shield volcano of HIERRO | Canary Islands | |
| TIOCA | Cinder cone of CHICHINAUTZIN | México | |
| TIOQUITAS | Cinder cone of CHICHINAUTZIN | México | |
| TIPAS | Complex volcano | Holocene | Northern Chile, Bolivia & Argentina |
| TIPT PON | Synonym of JOLO | Sulu Islands | |
| TIR, JIBBEL | Synonym of TAIR, JEBEL AT | Africa (northeastern) & Red Sea | |
| TIRAC | Dome of NATIB | Luzon | |
| TIRANUS | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| TIRBA, MONTANA | Cone of FUERTEVENTURA | Canary Islands | |
| TIRIHOI [BRAT CHIRPOEV] | Stratovolcano of CHIRPOI | Kuril Islands | |
| TIRIHOIGAKU [BRAT CHIRPOEV] | Stratovolcano of CHIRPOI | Kuril Islands | |
| TIRINKATAR | Pyroclastic Cone of ARAGATS | Caucasus, Georgia & Armenia | |
| TIRINKOTAN | Synonym of CHIRINKOTAN | Kuril Islands | |
| TIROHANGA | Dome of MAROA | New Zealand | |
| TIRONI | Vent of VESUVIUS | Italy | |
| TISATE, HERVIDEROS DE | Thermal Feature of TELICA | Nicaragua | |
| TISCAPA, LAGUNA DE | Maar of NEJAPA-MIRAFLORES | Nicaragua | |
| TISCHO, CERRO | Cinder cone of ANDAHUA-ORCOPAMPA | Perú | |
| TISHIGCUCHI | Dome of ILLINIZA | Ecuador | |
| TISON LAKE [MARDJA] | Crater of NGAOUNDERE PLATEAU | Africa (western) | |
| TITILA | Shield volcanoes | Radiocarbon | Kamchatka Peninsula |
| TIWI | Thermal Feature of MALINAO | Luzon | |
| TIWONGO | Cone of LOLOBAU | New Britain | |
| TIWU ATA MBUPU | Crater of KELIMUTU | Lesser Sunda Islands | |
| TIWU ATA POLO | Crater of KELIMUTU | Lesser Sunda Islands | |
| TIWU NUA MURI KOFAH [TIWU NUA MURI KOOH TAI] | Crater of KELIMUTU | Lesser Sunda Islands | |
| TIWU NUA MURI KOOH TAI | Crater of KELIMUTU | Lesser Sunda Islands | |
| TIYAW | Synonym of TEON | Banda Sea | |
| TJALDSTADAGJA | Crater Row of REYKJANES | Iceland (southwestern) | |
| TJANAR [CANAR] | Crater of TALAGABODAS | Java | |
| TJAREME | Synonym of CEREME | Java | |
| TJARNAHNUKUR | Crater Row of HENGILL | Iceland (southwestern) | |
| TJARNARHOLAR | Crater Row of GRIMSNES | Iceland (southwestern) | |
| TJATOE [CATU] | Crater of BATUR | Lesser Sunda Islands | |
| TJATUR CALDERA | Synonym of BRATAN | Lesser Sunda Islands | |
| TJEMARA, GUNUNG [GUNUNG CEMERA] | Cone of IJEN | Java | |
| TJEREME (TJEREMAI, TJERME) | Synonym of CEREME | Java | |
| TJIANGKUANG [CANGKUANG] | Crater of SALAK | Java | |
| TJIAW | Synonym of TEON | Banda Sea | |
| TJIBEUREUM [CIBEUREUM] | Thermal Feature of PERBAKTI-GAGAK | Java | |
| TJIBEUREUM [CIBEUREUM] | Thermal Feature of KAMOJANG, KAWAH | Java | |
| TJIBEUREUM PALASARI [CIBEUREUM PALASARI] | Thermal Feature of PERBAKTI-GAGAK | Java | |
| TJIBODAS, KAWAH [KAWAH CIBODAS] | Thermal Feature of PERBAKTI-GAGAK | Java | |
| TJIBODAS, KAWAH [KAWAH CIBODAS] | Thermal Feature of SALAK | Java | |
| TJIBODAS, TJIPANAS [CIPANAS CIBODAS] | Thermal Feature of PERBAKTI-GAGAK | Java | |
| TJIBOERIAL [CIBURIAL] | Thermal Feature of KAMOJANG, KAWAH | Java | |
| TJIBOLANG, KAWAH [KAWAH CIBOLANG] | Thermal Feature of WAYANG-WINDU | Java | |
| TJIBULIRAN [CIBURIAL] | Thermal Feature of KAMOJANG, KAWAH | Java | |
| TJIBUNI, KAWAH [KAWAH CIBUNI] | Thermal Feature of PATUHA | Java | |
| TJIGAMEA, KAWAH [KAWAH CIGAMEA] | Thermal Feature of SALAK | Java | |
| TJIGUPAKAN [CIGUPAKAN] | Thermal Feature of KENDANG | Java | |
| TJIHIDEUNG, TJIPANAS [CIPANAS CIHIDEUNG] | Thermal Feature of SALAK | Java | |
| TJIKALUWUNG PUTRI, KAWAH [CIKALUWUNG] | Thermal Feature of SALAK | Java | |
| TJIKALUWUNG, TJIPANAS [CIPANAS CIKALUWUNG] | Thermal Feature of PERBAKTI-GAGAK | Java | |
| TJIKALUWUNGHERANG, KAWAH [CIKALUWUNGHERANG | Thermal Feature of PERBAKTI-GAGAK | Java | |
| TJILIK, GUNUNG [GUNUNG CILIK] | Cone of IJEN | Java | |
| TJIPAMATUTAN [CIPAMATUTAN] | Thermal Feature of PERBAKTI-GAGAK | Java | |
| TJIPANAS | See proper name (e.g. TJIBODAS, TJIPANAS) | Dutch spelling of Indonesian word for HOT SPRING | |
| TJIPANAS, KAWAH [KAWAH CIPANAS] | Thermal Feature of SALAK | Java | |
| TJIPENGASAHAN, KAWAH [KAWAH CIPENGASAHAN] | Thermal Feature of KAMOJANG, KAWAH | Java | |
| TJIREMAI | Synonym of CEREME | Java | |
| TJISALADA, KAWAH [KAWAH CISALADA] | Thermal Feature of SALAK | Java | |
| TJISALADA, TJIPANAS [CIPANAS CISALADA] | Thermal Feature of SALAK | Java | |
| TJISEKATI, TJIPANAS [CIPANAS CISEKATI] | Thermal Feature of PERBAKTI-GAGAK | Java | |
| TJISEUPAN, TJIPANAS [CIPANAS CISEUPAN] | Thermal Feature of PERBAKTI-GAGAK | Java | |
| TJIWIDEI, KAWAH [KAWAH CIWIDEI] | Thermal Feature of PATUHA | Java | |
| TJOLO, GUNUNG | Synonym of COLO [UNA UNA] | Sulawesi | |
| TJONDRODIMUKO [CONDRODIMUKO] | Thermal Feature of DIENG VOLCANIC COMPLEX | Java | |
| TJONDRODIMUKO, KAWAH [KAWAH CONDRODIMUKO] | Thermal Feature of MERBABU | Java | |
| TJONDROKEMUKO, KAWAH [KAWAH CONDRODIMUKO] | Thermal Feature of MERBABU | Java | |
| TJORNES FRACTURE ZONE | Submarine volcano | Historical | Iceland (northeastern) |
| TJUPU, GUNUNG [GUNUNG CUPU} | Cone of LAMONGAN | Java | |
| TLACOTENCO | Fissure vent of CHICHINAUTZIN | México | |
| TLACOTEPEC | Lava cone of CHICHINAUTZIN | México | |
| TLACUALLCLI | Cinder cone of CHICHINAUTZIN | México | |
| TLACUAYOL, CERRO | Cone of CHICHINAUTZIN | México | |
| TLALOC, VOLCAN | Shield volcano of CHICHINAUTZIN | México | |
| TLAMACAS | Dome of POPOCATEPETL | México | |
| TLAMACASCO | Lava cone of CHICHINAUTZIN | México | |
| TLAPEXCUA, VOLCAN | Cone of CHICHINAUTZIN | México | |
| TLEVAK STRAIT-SUEMEZ IS. | Volcanic field | Holocene | Alaska (eastern) |
| TMAN HIDUP | Cone of IYANG-ARGAPURA | Java | |
| TO-OD GRANDE | Thermal Feature of MAHAGNAO | Central Philippines | |
| TO-OD PEQUENA | Thermal Feature of MAHAGNAO | Central Philippines | |
| TO-SHIMA | Stratovolcano | Tephrochronology | Izu, Volcano, & Mariana Islands |
| TO'A | Tuff cone of TA'U | Samoan & Wallis Islands | |
| TOA TOA, MAUNGA | Pyroclastic Cone of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| TO'AGA | Cone of OFU-OLOSEGA | Samoan & Wallis Islands | |
| TOAZA | Stratovolcano of GUAGUA PICHINCHA | Ecuador | |
| TOBA | Caldera | Holocene | Sumatra |
| TOBAL | Cone of LOLOBAU | New Britain | |
| TOBARU | Unknown | Holocene | Halmahera |
| TOBARU | Synonym of IBU | Halmahera | |
| TOBELTSEN | Cinder cone of SEVERNY | Kamchatka Peninsula | |
| TOBU VOLCANO GROUP | Stratovolcano of ON-TAKE | Honshu | |
| TOCO, CERRO | Stratovolcano of PURICO COMPLEX | Northern Chile, Bolivia & Argentina | |
| TOCONADO (TOCONAO) | Synonym of LASCAR | Northern Chile, Bolivia & Argentina | |
| TODAKO (TODOEKOE, TODOKE) | Synonym of TODOKO-RANU | Halmahera | |
| TODOKE, LAKE | Maar of IBU | Halmahera | |
| TODOKO | Caldera of TODOKO-RANU | Halmahera | |
| TODOKO-RANU | Calderas | Holocene | Halmahera |
| TODRA VOLCANIC FIELD | Cinder cones | Holocene | Africa (northern) |
| TODUOKO, LAKE | Maar of IBU | Halmahera | |
| TOEBAROE | Synonym of IBU | Halmahera | |
| TOEDOE [TUDU] | Crater of PALUWEH | Lesser Sunda Islands | |
| TOEROEN, GUNUNG [GUNUNG TURUN] | Cone of UNGARAN | Java | |
| TOFOOA | Synonym of TOFUA | Tonga Islands | |
| TOFUA | Caldera | Historical | Tonga Islands |
| TOGASA-YAMA | Cinder cone of IZU-TOBU | Honshu | |
| TOGATTA HOT SPRING | Thermal Feature of ZAO | Honshu | |
| TOGO | Cinder cone of KHANUY GOL | Mongolia | |
| TOH, TARSO | Volcanic field | Holocene | Africa (northern) |
| TO'IAVEA | Cinder cone of SAVAI'I | Samoan & Wallis Islands | |
| TOKAANU | Thermal Feature of TAUPO | New Zealand | |
| TOKACHI | Stratovolcanoes | Historical | Hokkaido |
| TOKACHI-DAKE | Synonym of TOKACHI | Hokkaido | |
| TOKAJAIN | Synonym of LEWOTOLO | Lesser Sunda Islands | |
| TOKARA-IWO-JIMA | Synonym of KIKAI | Ryukyu Islands & Kyushu | |
| TOKATI | Synonym of TOKACHI | Hokkaido | |
| TOKISHIRAZU-YAMA | Synonym of FUJI | Honshu | |
| TOKIWA-YAMA | Synonym of FUJI | Honshu | |
| TOKOKO | Synonym of TONGKOKO | Sulawesi | |
| TOKOLOTAI, VITI | Cone of AOBA | Vanuatu | |
| TOKUOKO | Synonym of TODOKO-RANU | Halmahera | |
| TOLAV [TOW LAV] | Stratovolcano of SURETAMATAI | Vanuatu | |
| TOLBACHIK | Shield volcano | Historical | Kamchatka Peninsula |
| TOLBACHINSKAIA SOPKA | Synonym of TOLBACHIK | Kamchatka Peninsula | |
| TOLBATSCHINSKAJA SSOPKA | Synonym of TOLBACHIK | Kamchatka Peninsula | |
| TOLEDO | Caldera of VALLES CALDERA | USA (New Mexico) | |
| TOLEDO, CERRO | Dome of VALLES CALDERA | USA (New Mexico) | |
| TOLGUACA | Stratovolcano | Holocene | Central Chile & Argentina |
| TOLHUACA | Synonym of TOLGUACA | Central Chile & Argentina | |
| TOLIMA, NEVADO DEL | Stratovolcano | Historical | Colombia |
| TOLIMAN | Stratovolcano | Holocene | Guatemala |
| TOLIRE DJAHA [TOLIRE JAHA] | Crater of GAMALAMA | Halmahera | |
| TOLIRE JAHA | Crater of GAMALAMA | Halmahera | |
| TOLIRE KECIL | Crater of GAMALAMA | Halmahera | |
| TOLIRE KETJIL [TOLIRE KECIL] | Crater of GAMALAMA | Halmahera | |
| TOLLNERODDEN | Cone of JAN MAYEN | Atlantic Ocean (Jan Mayen) | |
| TOLMACHEV DOL | Cinder cones | Radiocarbon | Kamchatka Peninsula |
| TOLMACHEV VALLEY | Synonym of TOLMACHEV DOL | Kamchatka Peninsula | |
| TOLO | Synonym of DUKONO | Halmahera | |
| TOLUACH | Synonym of TOLBACHIK | Kamchatka Peninsula | |
| TOLUCA, NEVADO DE | Stratovolcano | Radiocarbon | México |
| TOM MACKAY CREEK | Cone of ISKUT-UNUK RIVER CONES | Canada | |
| TOMARI-YAMA | Synonym of GOLOVNIN | Kuril Islands | |
| TOMASQUILLO | Cone of CHICHINAUTZIN | México | |
| TOMBEL GRABEN | Cinder cones | Holocene | Africa (western) |
| TOMBEL PLAIN | Synonym of TOMBEL GRABEN | Africa (western) | |
| TOMBORO | Synonym of TAMBORA | Lesser Sunda Islands | |
| TOMBULUAN | Cone of MAHAWU | Sulawesi | |
| TOMPALUAN | Crater of LOKON-EMPUNG | Sulawesi | |
| TOMPASSO | Thermal Feature of TONDANO CALDERA | Sulawesi | |
| TOMPUSU | Cone of TONDANO CALDERA | Sulawesi | |
| TOMU | Thermal Feature of PALUWEH | Lesser Sunda Islands | |
| TONDACHI | Cone of SUWANOSE-JIMA | Ryukyu Islands & Kyushu | |
| TONDANO CALDERA | Caldera | Fumarolic | Sulawesi |
| TONDATI [TONDACHI] | Cone of SUWANOSE-JIMA | Ryukyu Islands & Kyushu | |
| TONDOUREK | Synonym of TENDUREK DAGI | Turkey | |
| TONEY MOUNTAIN | Shield volcano | Holocene? | Antarctica & South Sandwich Islands |
| TONGAMA | Crater of SUWANOSE-JIMA | Ryukyu Islands & Kyushu | |
| TONGARIKI | Pyroclastic Cone of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| TONGARIRO | Stratovolcanoes | Historical | New Zealand |
| TONGKOKO | Stratovolcano | Historical | Sulawesi |
| TONGLON | Synonym of SANTO TOMAS | Luzon | |
| TONGUE ISLAND | Cone of ZUKUR | Africa (northeastern) & Red Sea | |
| TONKAYA | Dome of KSUDACH | Kamchatka Peninsula | |
| TONKOKO | Synonym of TONGKOKO | Sulawesi | |
| TONTOG | Cone of MOTLAV | Vanuatu | |
| TONY MOUNTAIN | Synonym of TONEY MOUNTAIN | Antarctica & South Sandwich Islands | |
| TOOWA VALLEY | Synonym of GOLDEN TROUT CREEK | USA (California) | |
| TOOZAZA PEAK | Cone of TUYA VOLCANIC FIELD | Canada | |
| TOPAKI, GUNUNG | Stratovolcano of SIRUNG | Lesser Sunda Islands | |
| TOPAKKAYA TEPE | Cinder cone of ERCIYES DAGI | Turkey | |
| TOPILEJO-XICOMULCO VOLC FIELD | Synonym of CHICHINAUTZIN | México | |
| TOPO | Shield volcano of PICO | Azores | |
| TOPOLNIKA | Synonym of VEER | Kamchatka Peninsula | |
| TOPPGIG | Cone of SNAEFELLSJOKULL | Iceland (western) | |
| TOPPGIGUR | Fissure vent of HEKLA | Iceland (southern) | |
| TOPSO BUTTE | Cone of NEWBERRY | USA (Oregon) | |
| TORE | Lava cone | Holocene | Bougainville & Solomon Islands |
| TORFAJOKULL | Stratovolcano | Historical | Iceland (southern) |
| TORI-SHIMA | Stratovolcano | Historical | Izu, Volcano, & Mariana Islands |
| TORI-SIMA | Synonym of TORI-SHIMA | Izu, Volcano, & Mariana Islands | |
| TORIKABUTO-YAMA | Dome of UNZEN | Ryukyu Islands & Kyushu | |
| TORIKABUTO-YAMA | Dome of ZAO | Honshu | |
| TORINO-UMI | Crater of CHOKAI | Honshu | |
| TORINOKO-YAMA | Synonym of FUJI | Honshu | |
| TORINOUMI | Crater of IWAKI | Honshu | |
| TORN, VOLCA EL | Cone of OLOT VOLCANIC FIELD | Western Europe | |
| TORNYI | Cone of GOLETS-TORNYI GROUP | Kuril Islands | |
| TORO PUGRO | Dome of CHACANA | Ecuador | |
| TOROENG PRONG | Cinder cone | Holocene? | Southeast Asia |
| TORRE CAPPELLA | Crater of CAMPI FLEGREI | Italy | |
| TORRE GAVETA | Cone of CAMPI FLEGREI | Italy | |
| TORRENS POINT | Dome of SABA | West Indies | |
| TORRENT, VOLCA EL | Cone of OLOT VOLCANIC FIELD | Western Europe | |
| TORRES | Synonym of MARCHENA | Galápagos Islands | |
| TORRIONE | Vent of STROMBOLI | Italy | |
| TORTIK | Dome of UZON | Kamchatka Peninsula | |
| TORTUGA, ISLA | Shield volcano | Holocene | México |
| TORTUGA, ISLA | Tuff cone of NEGRA, SIERRA | Galápagos Islands | |
| TOSA SUCHA | Cinder cones | Holocene | Africa (northeastern) & Red Sea |
| TOSAMOSHIBE | Dome of KUTCHARO | Hokkaido | |
| TOSAMOSIBE [TOSAMOSHIBE] | Dome of KUTCHARO | Hokkaido | |
| TOSHICHI SPA | Thermal Feature of HACHIMANTAI | Honshu | |
| TOSITI SPA [TOSHICHI SPA] | Thermal Feature of HACHIMANTAI | Honshu | |
| TOT MOUNTAIN | Cinder cone of BACHELOR | USA (Oregon) | |
| TOTOGAN MALANG | Cone of SEMERU | Java | |
| TOUMB | Pyroclastic Cone of GHEGAM RIDGE | Caucasus, Georgia & Armenia | |
| TOUO, LE [WOOSANTAPALIPLIP] | Cone of AMBRYM | Vanuatu | |
| TOUPE, PUY DE LA | Cone of CHAINE DES PUYS | Western Europe | |
| TOUR, LA [WOOSANTAPALIPLIP] | Cone of AMBRYM | Vanuatu | |
| TOURKAL, PITON | Cinder cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| TOUSSIDE, TARSO | Stratovolcano | Holocene | Africa (northern) |
| TOVANUMBATIR | Stratovolcano of RABAUL | New Britain | |
| TOW ALESERE | Stratovolcano of SURETAMATAI | Vanuatu | |
| TOW LAV | Stratovolcano of SURETAMATAI | Vanuatu | |
| TOW MARAVRIG | Crater of SURETAMATAI | Vanuatu | |
| TOW MARKONG | Crater of SURETAMATAI | Vanuatu | |
| TOW MEAR | Crater of SURETAMATAI | Vanuatu | |
| TOW VETAM | Stratovolcano of SURETAMATAI | Vanuatu | |
| TOWADA | Caldera | Historical | Honshu |
| TOWADA-KO | Caldera of TOWADA | Honshu | |
| TOWADA-YAMA | Stratovolcano of TOWADA | Honshu | |
| TOWARI-YAMA | Stratovolcano of TOWADA | Honshu | |
| TOWAWASAG | Stratovolcano of SURETAMATAI | Vanuatu | |
| TOWER | Synonym of GENOVESA | Galápagos Islands | |
| TOWER HILL | Maar of NEWER VOLCANICS PROV | Australia | |
| TOWER PEAK [WOOSANTAPALIPLIP] | Cone of AMBRYM | Vanuatu | |
| TOWON GAR | Stratovolcano of SURETAMATAI | Vanuatu | |
| TOYA | Pleistocene caldera of USU | Hokkaido | |
| TOYAGAMORI | Dome of NARUGO | Honshu | |
| TOYATSUKA | Cone of FUJI | Honshu | |
| TRACHILAS | Cone of MILOS | Greece | |
| TRACHYLAS [TRACHILAS] | Cone of MILOS | Greece | |
| TRACHYTOVYI | Cone of UDOKAN PLATEAU | Russia (southeastern) | |
| TRAHUILES | Thermal Feature of PUYEHUE-CORDON CAULLE | Central Chile & Argentina | |
| TRAITOR'S HEAD | Stratovolcano | Historical | Vanuatu |
| TRAKHITOVYI | Cone of UDOKAN PLATEAU | Russia (southeastern) | |
| TRAMPA, CERRO LA | Stratovolcano of IZTACCIHUATL | México | |
| TRAPA-TRAPA | Caldera of COPAHUE | Central Chile & Argentina | |
| TRAPEZINA | Dome of NISYROS | Greece | |
| TRAPICHITO, CERRO | Cinder cone of CUILAPA-BARBARENA | Guatemala | |
| TRAUTZBERGER | Maar of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| TRAVERSA CAMPANA | Crater of CAMPI FLEGREI | Italy | |
| TRE MONTI | Cinder cone of ETNA | Italy | |
| TREBOL, VOLCAN EL | Crater of PINACATE | México | |
| TRENTAREMI | Crater of CAMPI FLEGREI | Italy | |
| TRES CHICAS, LAS | Caldera of ZITACUARO-VALLE DE BRAVO | México | |
| TRES CRUCES | Cinder cone of CHICHINAUTZIN | México | |
| TRES CRUCES, CERRO | Cinder cone of CHICHINAUTZIN | México | |
| TRES CUMBRES, CERRO | Cone of CHICHINAUTZIN | México | |
| TRES HERMANAS [YEPOCAPA] | Stratovolcano of ACATENANGO | Guatemala | |
| TRES MARIAS [YEPOCAPA] | Stratovolcano of ACATENANGO | Guatemala | |
| TRES MARIAS HILLS | Dome of CAMIGUIN | Mindanao | |
| TRES MARIAS, LAS | Synonym of BARVA | Costa Rica | |
| TRES VIRGENES | Stratovolcanoes | Holocene? | México |
| TRESCHINA | Cinder cone of TOLBACHIK | Kamchatka Peninsula | |
| TRESSOUS, PUY DE | Cone of CHAINE DES PUYS | Western Europe | |
| TRETIY | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| TREUGOLNY ZUB | Dome of BEZYMIANNY | Kamchatka Peninsula | |
| TREZUBETZ | Somma volcano of KOLOKOL GROUP | Kuril Islands | |
| TRI SESTRY | Stratovolcano | Holocene? | Kuril Islands |
| TRIADES | Dome of MILOS | Greece | |
| TRIANGLE | Dome of EDZIZA | Canada | |
| TRIDENT | Stratovolcano | Historical | Alaska Peninsula |
| TRIFOGLIETTO | Shield volcano of ETNA | Italy | |
| TRILOPE | Synonym of COPAHUE | Central Chile & Argentina | |
| TRINDADE | Stratovolcano | Holocene | Atlantic Ocean (central) |
| TRINDADE, PICO | Dome of TRINDADE | Atlantic Ocean (central) | |
| TRINITYBERGET | Cone of JAN MAYEN | Atlantic Ocean (Jan Mayen) | |
| TRIPLEX | Cone of EDZIZA | Canada | |
| TRIPPABJALLAR | Fissure vent of HEKLA | Iceland (southern) | |
| TRIPPAFJOLL [TRIPPABJALLAR] | Fissure vent of HEKLA | Iceland (southern) | |
| TRIPPODI, MONTE | Dome of ISCHIA | Italy | |
| TRISTAN DA CUNHA | Shield volcano | Historical | Atlantic Ocean (southern) |
| TRITON | Dome of SANTORINI | Greece | |
| TRITRIVA | Cone of ANKARATRA FIELD | Indian Ocean (western) | |
| TROCON | Lava domes | Holocene? | Central Chile & Argentina |
| TROINA, MONTE | Cinder cone of ETNA | Italy | |
| TROIS PITONS, MORNE | Complex volcano | Radiocarbon | West Indies |
| TROIS RIVIERES-MADELEINE | Volcanic field of SOUFRIERE GUADELOUPE | West Indies | |
| TROIS SOLS, PUY DES [PUY DE TRESSOUS] | Cone of CHAINE DES PUYS | Western Europe | |
| TROIS TETES, PITON | Cinder cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| TROITSKY | Crater of MALY SEMIACHIK | Kamchatka Peninsula | |
| TROITZKY [TROITSKY] | Crater of MALY SEMIACHIK | Kamchatka Peninsula | |
| TROLLADYNGJA | Crater Row of KRISUVIK | Iceland (southwestern) | |
| TROLLADYNGJA | Shield volcano of BARDARBUNGA | Iceland (northeastern) | |
| TROLLADYNGJA | Synonym of ASKJA | Iceland (northeastern) | |
| TROLLADYNGJUKERFID | Synonym of KRISUVIK | Iceland (southwestern) | |
| TROLLAGIGAR | Crater Row of BARDARBUNGA | Iceland (northeastern) | |
| TROLLASKOGAHRAUN | Crater Row of VATNAFJOLL | Iceland (southern) | |
| TROLOPE | Synonym of COPAHUE | Central Chile & Argentina | |
| TROMEN | Stratovolcanoes | Holocene | Central Chile & Argentina |
| TROMPETA, CERRO LA | Dome of MICHOACAN-GUANAJUATO | México | |
| TRONADOR | Stratovolcano | Holocene? | Southern Chile & Argentina |
| TRONADOR, EL | Thermal Feature of TECAPA | El Salvador & Honduras | |
| TROPHY MOUNTAIN | Cone of WELLS GRAY-CLEARWATER | Canada | |
| TROU AU NATRON | Pleistocene caldera of TOUSSIDE, TARSO | Africa (northern) | |
| TROU AU NATRON AU KOUSSI [ERA KOHOR] | Caldera of KOUSSI, EMI | Africa (northern) | |
| TROUT CREEK HILL | Shield volcano of WEST CRATER | USA (Washington) | |
| TROY | Dome of SABA | West Indies | |
| TRUMBULL, MT. | Cinder cone of UINKARET FIELD | USA (Arizona) | |
| TSANZERGWE | Cone of KARISIMBI | Africa (central) | |
| TSCHAOCHTSCH | Synonym of KOSHELEV | Kamchatka Peninsula | |
| TSEAX RIVER CONE | Pyroclastic cone | Radiocarbon | Canada |
| TSEKONE RIDGE | Vent of EDZIZA | Canada | |
| TSENTRALNY [CENTRALNY] | Shield volcano of POGRANYCHNY | Kamchatka Peninsula | |
| TSENTRALNYY SEMIACHIK [ZENTRALNY SEMIACHIK] | Stratovolcano of BOLSHOI SEMIACHIK | Kamchatka Peninsula | |
| TSEPOCHKA | Cinder cone of TOLBACHIK | Kamchatka Peninsula | |
| TSERBER | Synonym of SEMISOPOCHNOI | Aleutian Islands | |
| TSHABWATO | Cone of NYIRAGONGO | Africa (central) | |
| TSHAMBENE | Vent of NYAMURAGIRA | Africa (central) | |
| TSHANIA | Cone of VISOKE | Africa (central) | |
| TSHEGERE, ILE | Cone of NYIRAGONGO | Africa (central) | |
| TSHIBINDA | Cinder cones | Holocene | Africa (central) |
| TSHOVE [SHOVE] | Cone of NYAMURAGIRA | Africa (central) | |
| TSIATSIA | Synonym of TIATIA | Kuril Islands | |
| TSIFAJAVONA | Cone of ITASY VOLCANIC FIELD | Indian Ocean (western) | |
| TSIKURA | Synonym of CHIKURACHKI | Kuril Islands | |
| TSINGRADO-PROVATAS | Tuff cone of MILOS | Greece | |
| TSKHOUK-KARCKAR | Pyroclastic cones | Tephrochronology | Caucasus, Georgia & Armenia |
| TSUBAME | Thermal Feature of MYOKO | Honshu | |
| TSUBUNEGAMORI | Dome of MIKURA-JIMA | Izu, Volcano, & Mariana Islands | |
| TSUCHIURAZAWA | Stratovolcano of ON-TAKE | Honshu | |
| TSUETATE | Thermal Feature of KUJU | Ryukyu Islands & Kyushu | |
| TSUGAMORI | Stratovolcano of AKITA-YAKE-YAMA | Honshu | |
| TSUGAO-YAMA | Cone of FUJI | Honshu | |
| TSUGARU-FUJI | Synonym of IWAKI | Honshu | |
| TSUJINO-DAKE | Dome of IBUSUKI VOLCANIC FIELD | Ryukyu Islands & Kyushu | |
| TSUKAHARA | Thermal Feature of TSURUMI | Ryukyu Islands & Kyushu | |
| TSUKUMO-JIMA | Crater of UNZEN | Ryukyu Islands & Kyushu | |
| TSUKUSHI-FUJI [KAIMON] | Stratovolcano of IBUSUKI VOLCANIC FIELD | Ryukyu Islands & Kyushu | |
| TSURUGA-IKE | Crater of NORIKURA | Honshu | |
| TSURUGI-DAKE | Dome of KURIKOMA | Honshu | |
| TSURUGI-DAKE | Cone of HAKKODA GROUP | Honshu | |
| TSURUGI-YAMA | Dome of OSORE-YAMA | Honshu | |
| TSURUMI | Lava domes | Historical | Ryukyu Islands & Kyushu |
| TSURUMI-DAKE | Dome of TSURUMI | Ryukyu Islands & Kyushu | |
| TUAHU | Tuff cone of OKATAINA | New Zealand | |
| TUAHU | Dome of MAROA | New Zealand | |
| TUANSHAN | Cone of TENGCHONG | Southeast Asia | |
| TUANZISHAN | Cinder cone of KELUO GROUP | China (eastern) | |
| TUBARU | Synonym of IBU | Halmahera | |
| TUBER HILL | Stratovolcano of BRIDGE RIVER CONES | Canada | |
| TUCHIYU | Dome of AZUMA | Honshu | |
| TUCLE, CERRO | Synonym of TUJLE, CERRO | Northern Chile, Bolivia & Argentina | |
| TUDDAHRAUN | Fissure vent of KATLA | Iceland (southern) | |
| TUDU | Crater of PALUWEH | Lesser Sunda Islands | |
| TUDU | Crater of PALUWEH | Lesser Sunda Islands | |
| TUFTON HALL | Thermal Feature of ST. CATHERINE | West Indies | |
| TUGAMORI [TSUGAMORI] | Stratovolcano of AKITA-YAKE-YAMA | Honshu | |
| TUGARU-HUZI | Synonym of IWAKI | Honshu | |
| TUGLE, CERRO | Synonym of TUJLE, CERRO | Northern Chile, Bolivia & Argentina | |
| TUGUMYNK | Dome of KURILE LAKE | Kamchatka Peninsula | |
| TUHINGAMATA | Dome of TAUPO | New Zealand | |
| TUHUA | Synonym of MAYOR ISLAND | New Zealand | |
| TUI LAKE | Crater of RAOUL ISLAND | Kermadec Islands | |
| TUILA [TUYLA] | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| TUJLE, CERRO | Maar | Holocene | Northern Chile, Bolivia & Argentina |
| TUKAD KLADI HOT SPRING | Thermal Feature of BRATAN | Lesser Sunda Islands | |
| TUKANG KALO | Dome of LABO | Luzon | |
| TUKAP | Stratovolcano of MEDVEZHIA | Kuril Islands | |
| TUKAY | Cone of JOLO | Sulu Islands | |
| TUKOSMERU | Stratovolcano of YASUR | Vanuatu | |
| TUKULLUM | Synonym of BAKER | USA (Washington) | |
| TULABUG, CERRO | Cinder cone of LICTO | Ecuador | |
| TULAMAN [TULUMAN] | Cone of ST. ANDREW STRAIT | Admiralty Islands | |
| TULE, CERRO EL | Shield volcano of MICHOACAN-GUANAJUATO | México | |
| TULE, CERRO EL | Dome of PRIMAVERA, SIERRA LA | México | |
| TULE, CERRO EL | Cone of SAN DIEGO | El Salvador & Honduras | |
| TULIK | Stratovolcano of OKMOK | Aleutian Islands | |
| TULLU MOJE | Pumice cone | Anthropology | Africa (northeastern) & Red Sea |
| TULU BILLA | Cinder cone of O'A CALDERA | Africa (northeastern) & Red Sea | |
| TULU FIKE | Pyroclastic Cone of O'A CALDERA | Africa (northeastern) & Red Sea | |
| TULU MOJE | Synonym of TULLU MOJE | Africa (northeastern) & Red Sea | |
| TULUACH | Synonym of TOLBACHIK | Kamchatka Peninsula | |
| TULULUSIA | Dome of MERU | Africa (eastern) | |
| TULUMAN | Cone of ST. ANDREW STRAIT | Admiralty Islands | |
| TUMANOV | Stratovolcano of ASACHA | Kamchatka Peninsula | |
| TUMATANGAS | Cinder cone of JOLO | Sulu Islands | |
| TUMAYHINI | Cone of NYAMURAGIRA | Africa (central) | |
| TUMBA DEL BUEY, LA | Crater of MOCHO-CHOSHUENCO | Central Chile & Argentina | |
| TUMBLE BUTTES | Cinder cones | Holocene? | USA (California) |
| TUMPAK | Crater of KELUT | Java | |
| TUNAS, CERRO LAS | Cinder cone of DURANGO VOLCANIC FIELD | México | |
| TUNAS, CERRO LAS | Cinder cone of CINOTEPEQUE, CERRO | El Salvador & Honduras | |
| TUNAUMURI | Maar of DAKATAUA | New Britain | |
| TUNDROVIY | Shield volcano of OTDELNIY | Kamchatka Peninsula | |
| TUNG-CHIAO-TE-PU-SHAN [DONGJIAODEBUSHAN] | Cone of WUDALIANCHI | China (eastern) | |
| TUNG-HENG-TAO-SHAN [DONGHENGDAOSHAN] | Cone of LONGGANG GROUP | China (eastern) | |
| TUNG-LUNG-MEN-SHAN [DONGLONGMENSHAN] | Cone of WUDALIANCHI | China (eastern) | |
| TUNG-LUNG-WAN [DONGLONGWAN] | Maar of LONGGANG GROUP | China (eastern) | |
| TUNGGUL, BUKIT | Stratovolcano of TANGKUBANPARAHU | Java | |
| TUNGNAFELLSJOKULL | Stratovolcano | Holocene | Iceland (northeastern) |
| TUNGNARBOTNAHRAUN | Fissure vent of BARDARBUNGA | Iceland (northeastern) | |
| TUNGURAGUA | Synonym of TUNGURAHUA | Ecuador | |
| TUNGURAHUA | Stratovolcano | Historical | Ecuador |
| TUNIPILYAKUM | Shield volcano of IKTUNUP | Kamchatka Peninsula | |
| TUNISSET, PUY DE [PUY DE TENUSSET] | Cone of CHAINE DES PUYS | Western Europe | |
| TUNKA DEPRESSION | Synonym of TUNKIN DEPRESSION | Russia (southeastern) | |
| TUNKIN DEPRESSION | Volcanic field | Holocene? | Russia (southeastern) |
| TUNNEL CONE | Cinder cone of GOLDEN TROUT CREEK | USA (California) | |
| TUNOA | Shield volcano of TA'U | Samoan & Wallis Islands | |
| TUO, KAPUNDAN [KEPUNDAN TUO] | Crater of MARAPI | Sumatra | |
| TUO, KEPUNDAN | Crater of MARAPI | Sumatra | |
| TUPINIER | Synonym of SAKAR | Northeast of New Guinea | |
| TUPUNGATITO | Stratovolcano | Historical | Central Chile & Argentina |
| TURANGUNAN | Stratovolcano of RABAUL | New Britain | |
| TURBID LAKE | Crater of YELLOWSTONE | USA (Wyoming) | |
| TURCHIO, MONTE | Cinder cone of ETNA | Italy | |
| TURFAN | Cone | Historical | China (western) |
| TURKEY RIDGE | Dome of VALLES CALDERA | USA (New Mexico) | |
| TURQUOISE CONE | Stratovolcano of FISHER | Aleutian Islands | |
| TURRAH, HARRAT | Volcanic field of RAHAT, HARRAT | Arabia | |
| TURRIALBA | Stratovolcano | Historical | Costa Rica |
| TURU | Stratovolcano of BARVA | Costa Rica | |
| TURUGA-IKE [TSURUGA-IKE] | Crater of NORIKURA | Honshu | |
| TURUGI-DAKE [TSURUGI-DAKE] | Cone of HAKKODA GROUP | Honshu | |
| TURUGI-YAMA [TSURUGI-DAKE] | Dome of KURIKOMA | Honshu | |
| TURUGI-YAMA [TSURUGI-YAMA] | Dome of OSORE-YAMA | Honshu | |
| TURUMI | Synonym of TSURUMI | Ryukyu Islands & Kyushu | |
| TURUMI-DAKE [TSURUMI-DAKE] | Dome of TSURUMI | Ryukyu Islands & Kyushu | |
| TURUN, GUNUNG | Cone of UNGARAN | Java | |
| TUSCOLANA-ARTEMISIO | Pleistocene caldera of ALBAN HILLS | Italy | |
| TUSCOLANO-ARTEMISIO | Stratovolcano of ALBAN HILLS | Italy | |
| TUSI AL YAMANI, JABAL AT | Cone of BIRK, HARRAT AL | Arabia | |
| TUSI ASH SHAMI, JABAL AT | Cone of BIRK, HARRAT AL | Arabia | |
| TUTAEHEKA | Dome of OKATAINA | New Zealand | |
| TUTE, CERRO EL | Dome of APASTEPEQUE FIELD | El Salvador & Honduras | |
| TUTONG, GUNUNG | Synonym of TELONG, BUR NI | Sumatra | |
| TUTUILA | Tuff cones | Holocene | Samoan & Wallis Islands |
| TUTUKAU | Dome of MAROA | New Zealand | |
| TUTULTEPEQUE, CERRO | Cinder cone of CINOTEPEQUE, CERRO | El Salvador & Honduras | |
| TUTUNG, GUNUNG | Dome of PEUET SAGUE | Sumatra | |
| TUTUPACA | Stratovolcano | Holocene | Perú |
| TUVIO, MONT | Cone of AMBRYM | Vanuatu | |
| TUVURVUR [TAVURVUR] | Stratovolcano of RABAUL | New Britain | |
| TUXPAN | Shield volcano of ZITACUARO-VALLE DE BRAVO | México | |
| TUXTEPEC | Cinder cone of CHICHINAUTZIN | México | |
| TUXTLA, VOLCAN DE | Synonym of SAN MARTIN | México | |
| TUYA #2 | Tuya of TUYA VOLCANIC FIELD | Canada | |
| TUYA BUTTE | Tuya of TUYA VOLCANIC FIELD | Canada | |
| TUYA BUTTE VOLC FIELD | Synonym of TUYA VOLCANIC FIELD | Canada | |
| TUYA LAKE VOLC FIELD | Synonym of TUYA VOLCANIC FIELD | Canada | |
| TUYA VOLCANIC FIELD | Volcanic field | Holocene | Canada |
| TUYAJTO, CERRO | Stratovolcano of CORDON DE PUNTAS NEGRAS | Northern Chile, Bolivia & Argentina | |
| TUYIO [MONT TUVIO] | Cone of AMBRYM | Vanuatu | |
| TUYLA | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| TUZGLE, CERRO | Stratovolcano | Holocene? | Northern Chile, Bolivia & Argentina |
| TUZOVSKY | Shield volcanoes | Holocene? | Kamchatka Peninsula |
| TV1 | Crater of WHITE ISLAND | New Zealand | |
| TVIBOLLAR | Crater Row of BRENNISTEINSFJOLL | Iceland (southwestern) | |
| TVILLING | Cone of JAN MAYEN | Atlantic Ocean (Jan Mayen) | |
| TVITUNUP | Shield volcano of TUZOVSKY | Kamchatka Peninsula | |
| TWIN | Cone of EDZIZA | Canada | |
| TWIN BUTTES | Cone of SQUAW RIDGE LAVA FIELD | USA (Oregon) | |
| TWIN BUTTES | Cinder cones | Holocene? | USA (California) |
| TWIN CALDERAS | Shield volcano of IMURUK LAKE | Alaska (western) | |
| TWIN CRATER | Crater of LANGILA | New Britain | |
| TWIN CRATERS | Cinder cone of BELKNAP | USA (Oregon) | |
| TWIN CRATERS | Crater of ZUNI-BANDERA | USA (New Mexico) | |
| TWIN MOUNTAIN | Cone of NUNIVAK ISLAND | Alaska (western) | |
| TWIN PEAKS | Dome of DIABLES, MORNE AUX | West Indies | |
| TWINDAUNG | Crater of LOWER CHINDWIN | Southeast Asia | |
| TWINYWA | Crater of LOWER CHINDWIN | Southeast Asia | |
| TWO POINT BUTTE | Cinder cone of CRATERS OF THE MOON | USA (Idaho) | |
| TWUNAMURI | Maar of DAKATAUA | New Britain | |
| TYATYA | Synonym of TIATIA | Kuril Islands | |
| TYAUSU-DAKE [CHAUSU-DAKE] | Dome of NASU | Honshu | |
| TYAUSU-YAMA | Synonym of NIIGATA-YAKE-YAMA | Honshu | |
| TYOKAI | Synonym of CHOKAI | Honshu | |
| TYOSITIRO-YAMA [CHOSHICHIRO-YAMA] | Dome of AKAGI | Honshu | |
| TYUO-KAKOKYU [CHUO-KAKOKYU] | Cone of TOKACHI | Hokkaido | |
| TZANJUYUB | Pleistocene caldera of SANTO TOMAS | Guatemala | |
| TZAPOTLAN | Synonym of COLIMA | México | |
| TZEMPOLI | Cinder cone of CHICHINAUTZIN | México | |
| TZINTZUNGO, CERRO DE | Cinder cone of MICHOACAN-GUANAJUATO | México | |
| UACHLAR (UAKHLAR) | Synonym of ICHINSKY | Kamchatka Peninsula | |
| UAU EN NAMUS | Synonym of WAU-EN-NAMUS | Africa (northern) | |
| UBAKURA-YAMA | Stratovolcano of IWATE | Honshu | |
| UBAYU | Dome of AZUMA | Honshu | |
| UBEHEBE CRATERS | Maars | Anthropology | USA (California) |
| UBIA, MOUNT | Dome of SULU RANGE | New Britain | |
| UBINAS | Stratovolcano | Historical | Perú |
| UCANCA | Pleistocene caldera of TENERIFE | Canary Islands | |
| UCHI-YAMA | Dome of TSURUMI | Ryukyu Islands & Kyushu | |
| UCHINO | Cinder cone of IZU-TOBU | Honshu | |
| UCHIURA-DAKE | Synonym of KOMAGA-TAKE | Hokkaido | |
| UCHTAPOLIAR | Cone of GHEGAM RIDGE | Caucasus, Georgia & Armenia | |
| UCHUCHEI | Cone of UDOKAN PLATEAU | Russia (southeastern) | |
| UCTEPELER | Cone of ERCIYES DAGI | Turkey | |
| UCUK DAGI | Cone of ERCIYES DAGI | Turkey | |
| UD'ALE | Synonym of ASSAB VOLCANIC FIELD | Africa (northeastern) & Red Sea | |
| UDINA | Stratovolcanoes | Holocene | Kamchatka Peninsula |
| UDO | Tuff cone of HALLA | Korea | |
| UDOKAN PLATEAU | Pyroclastic cones | Radiocarbon | Russia (southeastern) |
| UEA ISLAND | Synonym of WALLIS ISLANDS | Samoan & Wallis Islands | |
| UETEWARA-YAMA | Stratovolcano of ON-TAKE | Honshu | |
| UGASHIK | Pleistocene caldera of UGASHIK-PEULIK | Alaska Peninsula | |
| UGASHIK-PEULIK | Stratovolcano | Historical | Alaska Peninsula |
| UGOS | Dome of LEONARD RANGE | Mindanao | |
| UHAMBULE | Dome of SW USANGU BASIN | Africa (eastern) | |
| UHAY, MT. | Cone of CAMIGUIN | Mindanao | |
| UILYUCHINSKY | Synonym of VILYUCHIK | Kamchatka Peninsula | |
| UINKARET FIELD | Volcanic field | Anthropology | USA (Arizona) |
| UIUN-KHOLDONGI | Synonym of WUDALIANCHI | China (eastern) | |
| UJAKUSHATSCH | Synonym of REDOUBT | Alaska (southwestern) | |
| UJUN-HOLDONGI | Synonym of WUDALIANCHI | China (eastern) | |
| UKA | Shield volcano | Holocene? | Kamchatka Peninsula |
| UK'ELEDI | Synonym of WRANGELL | Alaska (eastern) | |
| UKHO | Cinder cone of YAVINSKY | Kamchatka Peninsula | |
| UKINREK MAARS | Maars | Historical | Alaska Peninsula |
| UKSICHAN | Shield volcano | Holocene? | Kamchatka Peninsula |
| 'UKWATAIN | Cone of YAR, JABAL | Arabia | |
| ULAG-ARGINSKY [ULUG-ARGINSKY] | Cinder cone of AZAS PLATEAU | Russia (southeastern) | |
| ULAULA, PUU | Cone of KILAUEA | Hawaiian Islands | |
| ULAULA, PUU | Cone of MAUNA LOA | Hawaiian Islands | |
| ULAWON | Synonym of ULAWUN | New Britain | |
| ULAWUN | Stratovolcano | Historical | New Britain |
| ULE'EG | Stratovolcano of SURETAMATAI | Vanuatu | |
| ULIAEGAN | Synonym of ULIAGA | Aleutian Islands | |
| ULIAGA | Synonym of CARLISLE | Aleutian Islands | |
| ULIAGA | Stratovolcano | Holocene | Aleutian Islands |
| ULLUNG-DO | Synonym of ULREUNG | Korea | |
| ULMENER | Maar of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| ULO [PARASO] | Thermal Feature of NONDA | Bougainville & Solomon Islands | |
| ULREUNG | Stratovolcano | Radiocarbon | Korea |
| ULREUNGDO | Synonym of ULREUNG | Korea | |
| ULREUNO-DO | Synonym of ULREUNG | Korea | |
| ULTIMO PUESTO | Cone of ANTILLANCA GROUP | Central Chile & Argentina | |
| ULUG-ARGA | Cone of AZAS PLATEAU | Russia (southeastern) | |
| ULUG-ARGINSKII [ULUG-ARGINSKY] | Cinder cone of AZAS PLATEAU | Russia (southeastern) | |
| ULUG-ARGINSKY | Cinder cone of AZAS PLATEAU | Russia (southeastern) | |
| ULUG-ART-TAYGA | Cone of AZAS PLATEAU | Russia (southeastern) | |
| ULUINGGALAU | Cone of TAVEUNI | Fiji Islands | |
| ULULU, MOUNT | Cone of SULU RANGE | New Britain | |
| ULUMAM | Cone of KARKAR | Northeast of New Guinea | |
| ULUMAN, MT. | Synonym of KARKAR | Northeast of New Guinea | |
| ULUMBU | Thermal Feature of POCO LEOK | Lesser Sunda Islands | |
| ULUWUN | Synonym of ULAWUN | New Britain | |
| ULYABORSKIY [KHARA-BOLDOK] | Cone of TUNKIN DEPRESSION | Russia (southeastern) | |
| UM EL GARANIGH | Shield volcano of HARUJ | Africa (northern) | |
| UMANI | Cone of CHYULU HILLS | Africa (eastern) | |
| UMBOI | Complex volcano | Holocene | Northeast of New Guinea |
| UMI-JIGOKU | Thermal Feature of TSURUMI | Ryukyu Islands & Kyushu | |
| UMM AD DULU, JABAL | Maar of KISHB, HARRAT | Arabia | |
| UMM ARAFIEB, JEBEL | Shield volcano | Holocene? | Africa (northern) |
| UMM KHANDAG, JEBEL | Cone of BAYUDA VOLCANIC FIELD | Africa (northern) | |
| UMM QUREINAT | Cone of BAYUDA VOLCANIC FIELD | Africa (northern) | |
| UMM RUQUBAH, JABAL | Dome of RAHAT, HARRAT | Arabia | |
| UMMUNA | Synonym of ALE BAGU | Africa (northeastern) & Red Sea | |
| UNA UNA | Synonym of COLO [UNA UNA] | Sulawesi | |
| UNAGI | Maar of IBUSUKI VOLCANIC FIELD | Ryukyu Islands & Kyushu | |
| UNALAVQUEN | Synonym of CALLAQUI | Central Chile & Argentina | |
| UNDA HARARO | Shield volcano of MANDA HARARO | Africa (northeastern) & Red Sea | |
| UNDAGA ISLAND | Cone of MUNDUA | New Britain | |
| UNDAKA ISLAND [UNDAGA ISLAND] | Cone of MUNDUA | New Britain | |
| UNGARAN | Stratovolcano | Holocene | Java |
| UNION PEAK | Cone of CRATER LAKE | USA (Oregon) | |
| UNNAMED | Cinder cones | Holocene | Caucasus, Georgia & Armenia |
| UNNAMED | Lava cones | Holocene | Caucasus, Georgia & Armenia |
| UNNAMED | Pyroclastic cones | Holocene | Africa (northeastern) & Red Sea |
| UNNAMED | Fissure vents | Holocene | Africa (northeastern) & Red Sea |
| UNNAMED | Fissure vents | Holocene | Africa (northeastern) & Red Sea |
| UNNAMED | Cinder cones | Holocene | Africa (northeastern) & Red Sea |
| UNNAMED | Pyroclastic cone | Holocene | Africa (eastern) |
| UNNAMED | Volcanic field | Historical | Syria |
| UNNAMED | Volcanic field | Holocene | Syria |
| UNNAMED | Submarine volcano | Uncertain | Arabia |
| UNNAMED | Volcanic field | Holocene | Iran & Afghanistan |
| UNNAMED | Volcanic field | Holocene? | Iran & Afghanistan |
| UNNAMED | Submarine volcano ? | Uncertain | Indian Ocean (eastern) |
| UNNAMED | Submarine volcano | Fumarolic | Tonga Islands |
| UNNAMED | Submarine volcano | Fumarolic | Tonga Islands |
| UNNAMED | Submarine volcano | Historical | Tonga Islands |
| UNNAMED | Submarine volcano | Historical | Tonga Islands |
| UNNAMED | Submarine volcano | Historical | Tonga Islands |
| UNNAMED | Submarine volcano | Hydrophonic | Admiralty Islands |
| UNNAMED | Submarine volcano ? | Uncertain | Northeast of New Guinea |
| UNNAMED | Submarine volcano ? | Uncertain | New Britain |
| UNNAMED | Submarine volcano ? | Uncertain | New Britain |
| UNNAMED | Submarine volcanoes | Holocene | Bougainville & Solomon Islands |
| UNNAMED | Stratovolcanoes | Holocene? | Vanuatu |
| UNNAMED | Submarine volcano | Hydrophonic | Pacific Ocean (southwestern) |
| UNNAMED | Submarine volcano ? | Uncertain | Sangihe Islands |
| UNNAMED | Submarine volcano | Historical | North of Luzon |
| UNNAMED | Submarine volcano ? | Uncertain | Taiwan |
| UNNAMED | Submarine volcano ? | Uncertain | Taiwan |
| UNNAMED | Submarine volcano | Uncertain | Taiwan |
| UNNAMED | Submarine volcano | Historical | Taiwan |
| UNNAMED | Submarine volcano | Uncertain | Taiwan |
| UNNAMED | Submarine volcano ? | Uncertain | Izu, Volcano, & Mariana Islands |
| UNNAMED | Submarine volcano ? | Uncertain | Izu, Volcano, & Mariana Islands |
| UNNAMED | Submarine volcano ? | Uncertain | Izu, Volcano, & Mariana Islands |
| UNNAMED | Submarine volcano | Uncertain | Kuril Islands |
| UNNAMED | Submarine volcano ? | Uncertain | Kuril Islands |
| UNNAMED | Submarine volcano | Hydrophonic | Kuril Islands |
| UNNAMED | Submarine volcano | Historical | Kuril Islands |
| UNNAMED | Cinder cone | Holocene | Kamchatka Peninsula |
| UNNAMED | Shield volcanoes | Holocene | Kamchatka Peninsula |
| UNNAMED | Shield volcanoes | Holocene | Kamchatka Peninsula |
| UNNAMED | Cinder cones | Holocene? | Kamchatka Peninsula |
| UNNAMED | Shield volcano | Holocene? | Kamchatka Peninsula |
| UNNAMED | Volcanic field | Uncertain | China (western) |
| UNNAMED | Thermal Feature of MAKUSHIN | Aleutian Islands | |
| UNNAMED | Lava dome | Holocene | Alaska Peninsula |
| UNNAMED | Submarine volcano ? | Uncertain | Pacific Ocean (northern) |
| UNNAMED | Submarine volcano ? | Uncertain | Hawaiian Islands |
| UNNAMED | Submarine volcano | Historical | Hawaiian Islands |
| UNNAMED | Submarine volcano | Historical | Pacific Ocean (eastern) |
| UNNAMED | Submarine volcano | Historical | Pacific Ocean (eastern) |
| UNNAMED | Submarine volcano | Historical | Pacific Ocean (eastern) |
| UNNAMED | Submarine volcano | Uncertain | Pacific Ocean (southern) |
| UNNAMED | Submarine volcano | Uncertain | Pacific Ocean (southern) |
| UNNAMED | Submarine volcano ? | Uncertain | México |
| UNNAMED | Pyroclastic cone | Holocene? | Northern Chile, Bolivia & Argentina |
| UNNAMED | Submarine volcano | Uncertain | Pacific Ocean (Chilean Islands) |
| UNNAMED | Submarine volcano | Uncertain | Arctic Ocean |
| UNNAMED | Submarine volcano | Holocene | Arctic Ocean |
| UNNAMED | Submarine volcano | Historical | Atlantic Ocean (northern) |
| UNNAMED | Submarine volcano | Uncertain | Atlantic Ocean (northern) |
| UNNAMED | Submarine volcano | Historical | Atlantic Ocean (northern) |
| UNNAMED | Submarine volcano ? | Uncertain | Atlantic Ocean (central) |
| UNNAMED | Submarine volcano | Uncertain | Atlantic Ocean (central) |
| UNNAMED | Submarine volcano | Uncertain | Atlantic Ocean (central) |
| UNNAMED | Submarine volcano | Uncertain | Atlantic Ocean (central) |
| UNNAMED | Scoria cones | Holocene? | Antarctica & South Sandwich Islands |
| UNNAMED | Submarine volcano | Holocene? | Antarctica & South Sandwich Islands |
| UNSEN-DAKE | Synonym of UNZEN | Ryukyu Islands & Kyushu | |
| UNUK RIVER [SECOND CANYON] | Cone of ISKUT-UNUK RIVER CONES | Canada | |
| UNZEN | Complex volcano | Historical | Ryukyu Islands & Kyushu |
| UNZEN | Complex volcano | Historical | Ryukyu Islands & Kyushu |
| UOCHTEPEH | Pyroclastic Cone of GHEGAM RIDGE | Caucasus, Georgia & Armenia | |
| UOIVE GROUP (UOIVI) | Synonym of MANAGLASE PLATEAU | New Guinea & D'Entrecasteaux Islands | |
| UPAS | Thermal Feature of DIENG VOLCANIC COMPLEX | Java | |
| UPAS, KAWAH | Crater of TANGKUBANPARAHU | Java | |
| UPEPESANKE | Dome of NIPESOTSU-MARUYAMA | Hokkaido | |
| UPOLU | Shield volcano | Holocene | Samoan & Wallis Islands |
| UPPER ATIAMURI | Dome of MAROA | New Zealand | |
| UPPER BIYKHEM PLATEAU | Synonym of AZAS PLATEAU | Russia (southeastern) | |
| UPPER BOL'SHOI ENISEY | Synonym of AZAS PLATEAU | Russia (southeastern) | |
| UPPER BOL'SHOY YENISEY | Synonym of AZAS PLATEAU | Russia (southeastern) | |
| UPPER DOME | Dome of MONO CRATERS | USA (California) | |
| UPPER GEYSER BASIN | Thermal Feature of YELLOWSTONE | USA (Wyoming) | |
| UPPER GLACIER VALLEY | Thermal Feature of MAKUSHIN | Aleutian Islands | |
| UPPER MARUANOT | Thermal Feature of PINATUBO | Luzon | |
| UPSAL HOGBACK | Cinder cone of SODA LAKES | USA (Nevada) | |
| UQUILA, CERRO | Stratovolcano of PAMPA LUXSAR | Northern Chile, Bolivia & Argentina | |
| URACAS (URACCAS) | Synonym of FARALLON DE PAJAROS | Izu, Volcano, & Mariana Islands | |
| 'URAIS, JABAL | Cone of SAWAD, HARRA ES- | Arabia | |
| URAJIGOKU | Crater of KUTTARA | Hokkaido | |
| URATAMAN | Somma volcano | Holocene | Kuril Islands |
| URDALSHRAUN EYSTRI | Crater Row of KVERKFJOLL | Iceland (northeastern) | |
| URDALSHRAUN VESTARI | Crater Row of KVERKFJOLL | Iceland (northeastern) | |
| URIKOMAM | Synonym of ALAYTA | Africa (northeastern) & Red Sea | |
| URJI | Cone of CORBETTI CALDERA | Africa (northeastern) & Red Sea | |
| 'URR, JABAL EL- | Cone of DHAMAR, HARRAS OF | Arabia | |
| URUF, JEBEL | Cone of BAYUDA VOLCANIC FIELD | Africa (northern) | |
| URUN DUSH | Cinder cone of KHANUY GOL | Mongolia | |
| URUP-FUJI [KOLOKOL] | Stratovolcano of KOLOKOL GROUP | Kuril Islands | |
| URUPPU FUDZI [KOLOKOL] | Stratovolcano of KOLOKOL GROUP | Kuril Islands | |
| USAMI | Stratovolcano of IZU-TOBU | Honshu | |
| USASYR | Synonym of USHISHUR | Kuril Islands | |
| USHAKOVSKAYA | Thermal Feature of AKADEMIA NAUK | Kamchatka Peninsula | |
| USHIGAKUBO | Vent of FUJI | Honshu | |
| USHIRO-ASAHI-DAKE | Stratovolcano of DAISETSU | Hokkaido | |
| USHIROEBOSHI-DAKE | Stratovolcano of ZAO | Honshu | |
| USHISHIRU | Synonym of USHISHUR | Kuril Islands | |
| USHISHUR | Caldera | Historical | Kuril Islands |
| USHKINSKAYA (USHKOVSKAYA) | Synonym of USHKOVSKY | Kamchatka Peninsula | |
| USHKOVSKY | Compound volcano | Historical | Kamchatka Peninsula |
| USIRO-ASAHI-DAKE [USHIRO-ASAHI-DAKE] | Stratovolcano of DAISETSU | Hokkaido | |
| USISIRU | Synonym of USHISHUR | Kuril Islands | |
| USKOVSKII | Synonym of USHKOVSKY | Kamchatka Peninsula | |
| USMAJAC | Cinder cone of COLIMA | México | |
| USON | Synonym of UZON | Kamchatka Peninsula | |
| USORI | Pleistocene caldera of OSORE-YAMA | Honshu | |
| USORI-YAMA | Synonym of OSORE-YAMA | Honshu | |
| USTUP | Cone of OPALA | Kamchatka Peninsula | |
| USU | Stratovolcano | Historical | Hokkaido |
| USU-SHINZAN | Dome of USU | Hokkaido | |
| USU-YAMA | Cone of FUJI | Honshu | |
| USULUTAN | Stratovolcano | Holocene | El Salvador & Honduras |
| UTAL, CERRO DEL | Cinder cone of CHINGO | Guatemala | |
| UTAMA, KAWAH | Crater of PALUWEH | Lesser Sunda Islands | |
| UTASCHUT (UTASHUT) | Synonym of ZHELTOVSKY | Kamchatka Peninsula | |
| UTESIKI U SUKHOGO | Synonym of VEER | Kamchatka Peninsula | |
| UTI-YAMA [UCHI-YAMA] | Dome of TSURUMI | Ryukyu Islands & Kyushu | |
| UTILA ISLAND | Pyroclastic cones | Holocene | El Salvador & Honduras |
| UTIURA-DAKE | Synonym of KOMAGA-TAKE | Hokkaido | |
| UTSUBO-SHIMA [KAIMON] | Stratovolcano of IBUSUKI VOLCANIC FIELD | Ryukyu Islands & Kyushu | |
| UTSURYO-TO | Synonym of ULREUNG | Korea | |
| UTULOKA POINT | Cone of WALLIS ISLANDS | Samoan & Wallis Islands | |
| UTURUNCU | Stratovolcano | Pleistocene-Fumarolic | Northern Chile, Bolivia & Argentina |
| UVA, CERRITO DE LA | Dome of LAJAS, LAS | Nicaragua | |
| UVEA ISLAND | Synonym of WALLIS ISLANDS | Samoan & Wallis Islands | |
| UVERA'A | Stratovolcano of SURETAMATAI | Vanuatu | |
| UVILLAS (UVINAS) | Synonym of UBINAS | Perú | |
| 'UWAYRID, HARRAT | Volcanic field | Anthropology | Arabia |
| 'UWEIRIZH, HARRAT EL- | Synonym of 'UWAYRID, HARRAT | Arabia | |
| UYAKUZHACH | Synonym of ALAID | Kuril Islands | |
| UYUN-KHOLDONGI | Synonym of WUDALIANCHI | China (eastern) | |
| UYUNHORDONGI | Synonym of WUDALIANCHI | China (eastern) | |
| UZON | Calderas | Radiocarbon | Kamchatka Peninsula |
| VAALKOP | Tuff cone of PRINCE EDWARD ISLAND | Indian Ocean (southern) | |
| VACHE, PUY DE LA | Cone of CHAINE DES PUYS | Western Europe | |
| VAGHRAMASSAR | Cone of GHEGAM RIDGE | Caucasus, Georgia & Armenia | |
| VAHILSKAIA, SOPKA | Synonym of ZHUPANOVSKY | Kamchatka Peninsula | |
| VAI A HEVA, MAUNGA | Dome of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| VAI FO | Cone of NIUAFO'OU | Tonga Islands | |
| VAIALA | Cone of SAVAI'I | Samoan & Wallis Islands | |
| VAILOATAI | Tuff cone of TUTUILA | Samoan & Wallis Islands | |
| VAILULU'U | Submarine volcano | Historical | Samoan & Wallis Islands |
| VAIOLO | Cone of SAVAI'I | Samoan & Wallis Islands | |
| VAIYOTS-SAR | Cone of DAR-ALAGES | Caucasus, Georgia & Armenia | |
| VAKA, MAUNGA | Pyroclastic Cone of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| VAKAK GROUP | Volcanic field | Holocene? | Iran & Afghanistan |
| VAKAT | Cinder cone of UDOKAN PLATEAU | Russia (southeastern) | |
| VAKHILSKAYA | Synonym of ZHUPANOVSKY | Kamchatka Peninsula | |
| VAKHUL'SKAYA SOPKA | Synonym of ZHUPANOVSKY | Kamchatka Peninsula | |
| VALAGJA | Fissure vent of HEKLA | Iceland (southern) | |
| VALDIVIA | Synonym of MOCHO-CHOSHUENCO | Central Chile & Argentina | |
| VALENTANO | Cone of VULSINI | Italy | |
| VALENTIN | Cone of KOSHELEV | Kamchatka Peninsula | |
| VALLE | See proper name (e.g. HERMOSO, VALLE) | Spanish for VALLEY | |
| VALLE DE ANTON, EL | Pleistocene caldera of VALLE, EL | Panamá | |
| VALLE DE BRAVO | Volcanic field of ZITACUARO-VALLE DE BRAVO | México | |
| VALLE, EL | Stratovolcano | Holocene? | Panamá |
| VALLE, VOLCAN DEL | Cinder cone of SANTA MARIA | Guatemala | |
| VALLES CALDERA | Caldera | Pleistocene-Fumarolic | USA (New Mexico) |
| VALLETTA, CUDDIA | Shield volcano of PANTELLERIA | Italy | |
| VALLEY | See proper name (e.g. DESOLATION, VALLEY OF) | ||
| VAMBU ISLAND | Cone of MUNDUA | New Britain | |
| VAN HEUTSZ CRATER | Crater of SEULAWAH AGAM | Sumatra | |
| VAN ZINDEREN BAKKER PEAK | Cone of PRINCE EDWARD ISLAND | Indian Ocean (southern) | |
| VANA KEI VUNA | Cone of TAVEUNI | Fiji Islands | |
| VANCORI | Stratovolcano of STROMBOLI | Italy | |
| VANEI VOLLOHULU | Synonym of LOPEVI | Vanuatu | |
| VANGORI | Synonym of BOLA | New Britain | |
| VANUA LAVA | Synonym of SURETAMATAI | Vanuatu | |
| VAO, MAUNGA | Pyroclastic Cone of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| VARADOURO | Thermal Feature of FAYAL | Azores | |
| VARU, MAUNGA [TE KAUHANGA] | Pyroclastic Cone of EASTER ISLAND | Pacific Ocean (Chilean Islands) | |
| VARZEA, PICO DO | Cone of SETE CIDADES | Azores | |
| VARZIN, MOUNT | Stratovolcano of RABAUL | New Britain | |
| VASSET, PUY | Dome of CHAINE DES PUYS | Western Europe | |
| VATELIERO | Crater of ISCHIA | Italy | |
| VATIA | Dome of TUTUILA | Samoan & Wallis Islands | |
| VATNAFJOLL | Fissure vents | Tephrochronology | Iceland (southern) |
| VATNAOLDUR | Crater Row of BARDARBUNGA | Iceland (northeastern) | |
| VATNSHEIDI | Shield volcano of REYKJANES | Iceland (southwestern) | |
| VATR | Synonym of ULAWUN | New Britain | |
| VAVALACI | Pleistocene caldera of ETNA | Italy | |
| VE'A | Cone of SAVAI'I | Samoan & Wallis Islands | |
| VECCHIA, LA | Pleistocene caldera of PANTELLERIA | Italy | |
| VECCHIENNA, LAGO | Crater of LARDERELLO | Italy | |
| VEDURHALSHRAUN | Fissure vent of KATLA | Iceland (southern) | |
| VEER | Cinder cones | Tephrochronology | Kamchatka Peninsula |
| VEGA DE CASTELLANOS | Maar of CALATRAVA VOLCANIC FIELD | Western Europe | |
| VEGA DE LA CANA, CERRO LA | Cinder cone of SAN DIEGO | El Salvador & Honduras | |
| VEGA, CERRITO LA | Cinder cone of CUILAPA-BARBARENA | Guatemala | |
| VEGA, CERRO LOS | Cinder cone of CUILAPA-BARBARENA | Guatemala | |
| VEGGJABUNGA | Shield volcano of ASKJA | Iceland (northeastern) | |
| VEIDIVOTN | Crater Row of BARDARBUNGA | Iceland (northeastern) | |
| VEKHNE-INGAMAKITSKY | Cinder cone of UDOKAN PLATEAU | Russia (southeastern) | |
| VELAIN | Crater of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| VELHA, CALDEIRA | Thermal Feature of AGUA DE PAU | Azores | |
| VELIE NUNATAK | Cone of HUDSON MOUNTAINS | Antarctica & South Sandwich Islands | |
| VELLA LAVELLA SULFUR FIELD [PARASO] | Thermal Feature of NONDA | Bougainville & Solomon Islands | |
| VELLUDA, SIERRA | Stratovolcano of ANTUCO | Central Chile & Argentina | |
| VENADOS, LOS | Fissure vent of CARRAN-LOS VENADOS | Central Chile & Argentina | |
| VENIAMINOF | Stratovolcano | Historical | Alaska Peninsula |
| VENT MOUNTAIN | Cone of ANIAKCHAK | Alaska Peninsula | |
| VENTANA, CERRO | Vent of CRATER BASALT VOLCANIC FIELD | Southern Chile & Argentina | |
| VENTANILLAS | Dome of CHACHIMBIRO | Ecuador | |
| VENTANITA | Pit crater of APASTEPEQUE FIELD | El Salvador & Honduras | |
| VENTARRON, EL | Caldera of MASAYA | Nicaragua | |
| VENTISQUEROS, CERRO DE LOS | Synonym of HUDSON, CERRO | Southern Chile & Argentina | |
| VENTURE HYDROTHERMAL FIELDS | Thermal Feature of UNNAMED | Pacific Ocean (eastern) | |
| VENUS | Cone of AMSTERDAM ISLAND | Indian Ocean (southern) | |
| VEPE | Pleistocene caldera of VULSINI | Italy | |
| VERBEEK, KAWAH | Crater of MARAPI | Sumatra | |
| VERDE, CABECO | Cone of FAYAL | Azores | |
| VERDE, CERRO | Cinder cone of SANTA ANA | El Salvador & Honduras | |
| VERDE, CERRO | Cone of TABURETE | El Salvador & Honduras | |
| VERDE, LAGUNA | Stratovolcano of APANECA RANGE | El Salvador & Honduras | |
| VERDE, VOLCAN LAGUNA | Cone of TOLGUACA | Central Chile & Argentina | |
| VERDELOMA | Stratovolcano of SANGAY | Ecuador | |
| VERDUGO, VOLCAN EL | Maar of PINACATE | México | |
| VERDUGO, VOLCAN EL [MACDOUGAL] | Maar of PINACATE | México | |
| VERKHNE-KOSHELEVSKIE | Thermal Feature of KOSHELEV | Kamchatka Peninsula | |
| VERKHNEYE | Thermal Feature of MUTNOVSKY | Kamchatka Peninsula | |
| VERKHNEYE THERMAL FIELD | Thermal Feature of BOLSHOI SEMIACHIK | Kamchatka Peninsula | |
| VERKHOVOY | Shield volcano | Holocene? | Kamchatka Peninsula |
| VERMELHO, PICO | Cone of AGUA DE PAU | Azores | |
| VERMILLION CHASM | Fissure vent of CRATERS OF THE MOON | USA (Idaho) | |
| VERNADSKII CRATER | Cone of VERNADSKII RIDGE | Kuril Islands | |
| VERNADSKII RIDGE | Cinder cones | Holocene | Kuril Islands |
| VERNADSKIY | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| VERRIERES, PUY DE [PUY THIOLET] | Cone of CHAINE DES PUYS | Western Europe | |
| VERT, MORNE | Dome of PLAT PAYS, MORNE | West Indies | |
| VESBIUS | Synonym of VESUVIUS | Italy | |
| VESLESSA | Cone of JAN MAYEN | Atlantic Ocean (Jan Mayen) | |
| VESTASTI URDARHALSGIGUR | Crater Row of KVERKFJOLL | Iceland (northeastern) | |
| VESTISNUTEN | Cone of JAN MAYEN | Atlantic Ocean (Jan Mayen) | |
| VESTMANNAEYJAR | Submarine volcanoes | Historical | Iceland (southern) |
| VESUBIO, CERRO DE | Cinder cone of ESTELI | Nicaragua | |
| VESUVE (VESUVIO) | Synonym of VESUVIUS | Italy | |
| VESUVIUS | Somma volcano | Historical | Italy |
| VETERAN | Submarine volcano | Fumarolic | Southeast Asia |
| VETLAM | Cone of AMBRYM | Vanuatu | |
| VETMWAN | Cone of MOTLAV | Vanuatu | |
| VETORE, MONTE | Cinder cone of ETNA | Italy | |
| VETTA, LA [MONTE AMIATA] | Dome of AMIATA | Italy | |
| VEYER | Synonym of VEER | Kamchatka Peninsula | |
| VEYO VOLCANO | Cone of SANTA CLARA | USA (Utah) | |
| VEZZI, MONTE DI | Dome of ISCHIA | Italy | |
| VIATOA | Cone of UPOLU | Samoan & Wallis Islands | |
| VIBORAS, MONTANA LAS | Cinder cone of SAN SALVADOR | El Salvador & Honduras | |
| VIBORAS, VOLCAN LAS | Shield volcano of CHINGO | Guatemala | |
| VICA, MONTANA LA | Cone of TENERIFE | Canary Islands | |
| VICHATEL, PUY DE | Cone of CHAINE DES PUYS | Western Europe | |
| VICO, MONTE | Dome of ISCHIA | Italy | |
| VICTORIA VOLC FIELD | Synonym of NEWER VOLCANICS PROV | Australia | |
| VICTORIA, MT. | Cone of AUCKLAND FIELD | New Zealand | |
| VICTORIABERG | Synonym of CAMEROON | Africa (western) | |
| VICTORY | Stratovolcano | Historical | New Guinea & D'Entrecasteaux Islands |
| VIDAL, CERRITO DE LOS | Lava cone of CHIQUIMULA VOLCANIC FIELD | Guatemala | |
| VIDAURRE, VOLCAN | Cone of CHILLAN, NEVADOS DE | Central Chile & Argentina | |
| VIDRIOS, VOLCAN LOS | Maar of PINACATE | México | |
| VIEDMA | Subglacial volcano | Historical | Southern Chile & Argentina |
| VIEJO CAYAMBE | Stratovolcano of CAYAMBE | Ecuador | |
| VIEJO, EL | Stratovolcano of TRES VIRGENES | México | |
| VIEJO, EL | Synonym of SAN CRISTOBAL | Nicaragua | |
| VIEJO, EL | Crater of GALERAS | Colombia | |
| VIEJO, PICO | Stratovolcano of TENERIFE | Canary Islands | |
| VIEJO, VOLCAN | Stratovolcano of CHILLAN, NEVADOS DE | Central Chile & Argentina | |
| VIEJONA, AUSOLES LA [VOLCANCITO] | Thermal Feature of CHINAMECA | El Salvador & Honduras | |
| VIENTO, MONTANA DEL | Cone of GRAN CANARIA | Canary Islands | |
| VIESOKAIA | Synonym of REDOUBT | Alaska (southwestern) | |
| VIETLAM [VETLAM] | Cone of AMBRYM | Vanuatu | |
| VIGIA, CERRO | Cinder cone of SAN MARTIN | México | |
| VIGIA, EL | Cone of TIGRE, ISLA EL | El Salvador & Honduras | |
| VIGIA, PICO DO | Dome of TRINDADE | Atlantic Ocean (central) | |
| VIGIE, MORNE LA [MORNE LA VUE] | Dome of PLAT PAYS, MORNE | West Indies | |
| VIGLA TEPE | Dome of ACIGOL-NEVSEHIR | Turkey | |
| VIGNA VECCHIA | Cone of STROMBOLI | Italy | |
| VIGUERIA, LA | Cone of CAYUTUE-LA VIGUERIA | Southern Chile & Argentina | |
| VIKAHRAUN | Fissure vent of ASKJA | Iceland (northeastern) | |
| VIKRABORGIR | Crater of ASKJA | Iceland (northeastern) | |
| VILFILFELLSHRAUN | Crater Row of BRENNISTEINSFJOLL | Iceland (southwestern) | |
| VILIUCHINSKAYA | Synonym of VILYUCHIK | Kamchatka Peninsula | |
| VILIUCHINSKY | Synonym of VILYUCHIK | Kamchatka Peninsula | |
| VILLA RICA | Synonym of VILLARRICA | Central Chile & Argentina | |
| VILLARRICA | Stratovolcano | Historical | Central Chile & Argentina |
| VILLARS, MAAR DE | Maar of CHAINE DES PUYS | Western Europe | |
| VILLELE, CRATERE DE | Crater of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| VILYAMS, MOUNT | Cone of SMIRNOV | Kuril Islands | |
| VILYUCHIK | Stratovolcano | Tephrochronology | Kamchatka Peninsula |
| VILYUCHINSKAYA | Synonym of VILYUCHIK | Kamchatka Peninsula | |
| VINA, LA | Cinder cone of HIERRO | Canary Islands | |
| VINAS, CERRITO LAS | Cinder cone of CUILAPA-BARBARENA | Guatemala | |
| VINDICATION ISLAND | Cone of CANDLEMAS ISLAND | Antarctica & South Sandwich Islands | |
| VINDICATORY ISLAND [VINDICATION ISLAND] | Cone of CANDLEMAS ISLAND | Antarctica & South Sandwich Islands | |
| VINE | Synonym of ILYINSKY | Kamchatka Peninsula | |
| VINI [NU'UTELE] | Tuff ring of UPOLU | Samoan & Wallis Islands | |
| VIOLA, LA | Cone of HUMEROS, LOS | México | |
| VIRGEN, CONO DE LA | Pyroclastic Cone of CAYAMBE | Ecuador | |
| VIRGEN, LA | Stratovolcano of TRES VIRGENES | México | |
| VIRGEN, MONTANA DE LA | Cinder cone of HIERRO | Canary Islands | |
| VIRGENES, VOLCAN LAS | Synonym of TRES VIRGENES | México | |
| VISOKAYA | Cinder cone of TOLBACHIK | Kamchatka Peninsula | |
| VISOKE | Stratovolcano | Historical | Africa (central) |
| VISOKIY | Stratovolcano | Holocene | Kamchatka Peninsula |
| VISOKOI VOLCANO | Synonym of HODSON | Antarctica & South Sandwich Islands | |
| VITA FUMO | Dome of CAMPI FLEGREI | Italy | |
| VITI | Crater of ASKJA | Iceland (northeastern) | |
| VITI | Maar of KRAFLA | Iceland (northeastern) | |
| VITIM PLATEAU | Cinder cones | Holocene | Russia (southeastern) |
| VITU | Synonym of GAROVE | New Britain | |
| VIUDITA, LA | Dome of ATACAZO | Ecuador | |
| VIVARA | Tuff ring of CAMPI FLEGREI | Italy | |
| VNESHNII | Dome of GOLOVNIN | Kuril Islands | |
| VODORAZDELNY | Shield volcano of POGRANYCHNY | Kamchatka Peninsula | |
| VOGELENZANG [KABA VOGELSANG] | Crater of KABA | Sumatra | |
| VOGELSANG, KABA | Crater of KABA | Sumatra | |
| VOGHALA | Thermal Feature of SAVO | Bougainville & Solomon Islands | |
| VOHITRA | Cone of ANKARATRA FIELD | Indian Ocean (western) | |
| VOHON, TARSO | Synonym of VOON, TARSO | Africa (northern) | |
| VOLADERO I, CERRO EL | Cinder cone of IXTEPEQUE | Guatemala | |
| VOLCA | See proper name (e.g. CANYA, VOLCA LA) | Spanish for VOLCANO | |
| VOLCAN | See proper name (e.g. FUEGO, VOLCAN DE) | Spanish for VOLCANO | |
| VOLCAN | Synonym of MUSUAN | Mindanao | |
| VOLCAN | Synonym of MADERAS | Nicaragua | |
| VOLCAN ISLAND | Synonym of MANAM | Northeast of New Guinea | |
| VOLCAN, CERRO | Cinder cone of CRATER BASALT VOLCANIC FIELD | Southern Chile & Argentina | |
| VOLCAN, CERRO EL | Lava cone of YOJOA, LAKE | El Salvador & Honduras | |
| VOLCAN, CERRO EL | Cinder cone of ESTELI | Nicaragua | |
| VOLCAN, CERRO EL | Dome of HUAYNAPUTINA | Perú | |
| VOLCAN, EL | Synonym of MISTI, EL | Perú | |
| VOLCAN, MONTANA DEL [SIETE FUENTES] | Cinder cone of TENERIFE | Canary Islands | |
| VOLCANCILLO, CERRO EL | Cone of CHACHANI, NEVADO | Perú | |
| VOLCANCILLO, EL | Cinder cone of COFRE DE PEROTE | México | |
| VOLCANCITO | See proper name (e.g. MARGARITAS, VOLCANCITO) | Spanish for VOLCANO | |
| VOLCANCITO | Cone of PACAYA | Guatemala | |
| VOLCANCITO, AUSOLES DEL | Thermal Feature of CHINAMECA | El Salvador & Honduras | |
| VOLCANCITO, EL | Dome of COLIMA | México | |
| VOLCANCITOS | Thermal Feature of RINCON DE LA VIEJA | Costa Rica | |
| VOLCANES DEL TATIO, GEISERES DE LOS | Synonym of TATIO, EL | Northern Chile, Bolivia & Argentina | |
| VOLCANES, LOS | Thermal Feature of PULPITO, PUNTA | México | |
| VOLCANIA | Thermal Feature of KOS | Greece | |
| VOLCANIC CREEK CONE | Cinder cone of ATLIN VOLCANIC FIELD | Canada | |
| VOLCANICO, CERRO [FONCK] | Cinder cone of TRONADOR | Southern Chile & Argentina | |
| VOLCANO | See proper name (e.g. EDD, VOLCANO OF) | ||
| VOLCANO BUTTE | Cone of COSO VOLCANIC FIELD | USA (California) | |
| VOLCANO ISLAND | Synonym of TAAL | Luzon | |
| VOLCANO MOUNTAIN | Cone of FORT SELKIRK | Canada | |
| VOLCANO PEAK | Cone of COSO VOLCANIC FIELD | USA (California) | |
| VOLCANO VENT | Shield volcano of TUYA VOLCANIC FIELD | Canada | |
| VOLCANO W | Submarine volcanoes | Fumarolic | Kermadec Islands |
| VOLCKNER ROCKS | Dome of WHITE ISLAND | New Zealand | |
| VOLODAVETS | Crater of TIATIA | Kuril Islands | |
| VOLSINI | Synonym of VULSINI | Italy | |
| VOLVIC, MAAR DE | Maar of CHAINE DES PUYS | Western Europe | |
| VON DRASCHE, CRATERE | Crater of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| VON FRANTZIUS | Stratovolcano of POAS | Costa Rica | |
| VON HOHNEL ISLAND | Synonym of SOUTH ISLAND | Africa (eastern) | |
| VON SEEBACH | Cone of RINCON DE LA VIEJA | Costa Rica | |
| VONIUCHI KHREBET | Synonym of KSUDACH | Kamchatka Peninsula | |
| VONYUCHI KHREBET | Synonym of KSUDACH | Kamchatka Peninsula | |
| VOON, TARSO | Stratovolcano | Fumarolic | Africa (northern) |
| VORAGINE, LA | Crater of ETNA | Italy | |
| VORDUFELLSBORGIR | Fissure vent of BRENNISTEINSFJOLL | Iceland (southwestern) | |
| VORDUFELLSHRAUN | Fissure vent of TINDFJALLAJOKULL | Iceland (southern) | |
| VOSMYORKA | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| VOSTOCHNY BARANY | Stratovolcano of BOLSHOI SEMIACHIK | Kamchatka Peninsula | |
| VOSTOCHNY THERMAL FIELD | Thermal Feature of UZON | Kamchatka Peninsula | |
| VOSTOK | Cinder cone of MEDVEZHIA | Kuril Islands | |
| VOTOS [BOTOS] | Stratovolcano of POAS | Costa Rica | |
| VOTOS, LOS | Synonym of POAS | Costa Rica | |
| VOUI, LAKE | Crater of AOBA | Vanuatu | |
| VOURKA | Thermal Feature of KOS | Greece | |
| VOYAMPOLSKY | Shield volcanoes | Holocene? | Kamchatka Peninsula |
| VROMOTOPOS | Thermal Feature of KOS | Greece | |
| VSEVIDOF | Stratovolcano | Historical | Aleutian Islands |
| VTORAIA MUTNOVSKAIA SOPKA | Synonym of GORELY | Kamchatka Peninsula | |
| VUE, MORNE LA | Dome of PLAT PAYS, MORNE | West Indies | |
| VUELTA KOPPER | Cinder cone of PLATANAR | Costa Rica | |
| VUI, LAKE [LAKE VOUI] | Crater of AOBA | Vanuatu | |
| VUITAVOA, VUSI | Cone of AOBA | Vanuatu | |
| VULCAIN | Cone of AMSTERDAM ISLAND | Indian Ocean (southern) | |
| VULCAN | Pumice cone of RABAUL | New Britain | |
| VULCAN DOME | Dome of ANIAKCHAK | Alaska Peninsula | |
| VULCAN ISLAND | Cone of RABAUL | New Britain | |
| VULCAN, MT. | Dome of CAMIGUIN | Mindanao | |
| VULCANELLO | Cone of VULCANO | Italy | |
| VULCANO | Stratovolcanoes | Historical | Italy |
| VULCANO ISLAND | Synonym of RITTER ISLAND | Northeast of New Guinea | |
| VULCANO LAZIALE | Pleistocene caldera of ALBAN HILLS | Italy | |
| VULCANS CASTLE | Dome of LASSEN VOLCANIC CENTER | USA (California) | |
| VULCAN'S THRONE | Cinder cone of UINKARET FIELD | USA (Arizona) | |
| VULCAO | Synonym of FOGO | Cape Verde Islands | |
| VULCAO DE LAGOA DO FOGO | Synonym of AGUA DE PAU | Azores | |
| VULCAO DO PAREDAO | Cone of TRINDADE | Atlantic Ocean (central) | |
| VULKAN [ASHI SHAN] | Cinder cone of KUNLUN VOLCANIC GROUP | China (western) | |
| VULSINI | Caldera | Historical | Italy |
| VUNAKANAU | Cone of RABAUL | New Britain | |
| VUNAKOKOR [VARZIN, MOUNT] | Stratovolcano of RABAUL | New Britain | |
| VUNUWERI | Synonym of TEON | Banda Sea | |
| VUSI | See proper name (e.g. NAMUI, VUSI) | Melanesian term for HILL | |
| VUTI | See proper name (e.g. TALAO, VUTI) | Melanesian term for HILL | |
| VUTUSUALA | Thermal Feature of SAVO | Bougainville & Solomon Islands | |
| VUVUNGANA, VUTI | Cone of AOBA | Vanuatu | |
| VYSOKAYA | Cone of GORELY | Kamchatka Peninsula | |
| VYSOKII | Synonym of VISOKIY | Kamchatka Peninsula | |
| VYSOKII | Synonym of VYSOKY | Kamchatka Peninsula | |
| VYSOKY | Stratovolcano | Radiocarbon | Kamchatka Peninsula |
| WAAWAA, PUU | Cone of HUALALAI | Hawaiian Islands | |
| WADE | Crater of WHITE ISLAND | New Zealand | |
| WADON | Crater of GEDE | Java | |
| WAESCHE | Shield volcanoes | Holocene? | Antarctica & South Sandwich Islands |
| WAGIFA ISLAND [WAGIPA ISLAND] | Cone of GOODENOUGH | New Guinea & D'Entrecasteaux Islands | |
| WAGIO | Crater of MAHAWU | Sulawesi | |
| WAGIPA ISLAND | Cone of GOODENOUGH | New Guinea & D'Entrecasteaux Islands | |
| WAGO-ZAN | Synonym of FUJI | Honshu | |
| WAHA PELE | Cone of HUALALAI | Hawaiian Islands | |
| WAHANGA | Dome of OKATAINA | New Zealand | |
| WAHANGA-WAIMANGU | Fissure vent of OKATAINA | New Zealand | |
| WAHI, GUNUNG [TEMPANG] | Cone of TONDANO CALDERA | Sulawesi | |
| WAI | See proper name (e.g. ASAM, WAI) | Indonesian for STREAM | |
| WAIHI-TOKAANU | Thermal Feature of TAUPO | New Zealand | |
| WAIHLUP | Cone of KEMBAR | Sumatra | |
| WAIKITE | Thermal Feature of OKATAINA | New Zealand | |
| WAIKORO | Crater of PALUWEH | Lesser Sunda Islands | |
| WAIKORO | Crater of PALUWEH | Lesser Sunda Islands | |
| WAILAGI CONES | Cone of GOODENOUGH | New Guinea & D'Entrecasteaux Islands | |
| WAIMANGU | Thermal Feature of OKATAINA | New Zealand | |
| WAIMATE | Cone of KAIKOHE-BAY OF ISLANDS | New Zealand | |
| WAIMIMITI | Cone of KAIKOHE-BAY OF ISLANDS | New Zealand | |
| WAI'OA | Synonym of WAIOWA | New Guinea & D'Entrecasteaux Islands | |
| WAIORA VALLEY | Thermal Feature of MAROA | New Zealand | |
| WAIOTAPU | Thermal Feature of REPOROA | New Zealand | |
| WAIOWA | Pyroclastic cone | Historical | New Guinea & D'Entrecasteaux Islands |
| WAIPA | Thermal Feature of ROTORUA | New Zealand | |
| WAIRAKEI | Thermal Feature of MAROA | New Zealand | |
| WAISHUHORUN | Cone of NISEKO | Hokkaido | |
| WAITA-YAMA | Cone of KUJU | Ryukyu Islands & Kyushu | |
| WAITANGI SODA SPRINGS | Thermal Feature of OKATAINA | New Zealand | |
| WAITOMOKIA | Maar of AUCKLAND FIELD | New Zealand | |
| WAIWHAKAPA [RIDGE DOME] | Dome of OKATAINA | New Zealand | |
| WAJANG-WINDU | Synonym of WAYANG-WINDU | Java | |
| WAKAK GROUP | Synonym of VAKAK GROUP | Iran & Afghanistan | |
| WAKALA HILL | Cone of GOODENOUGH | New Guinea & D'Entrecasteaux Islands | |
| WAKAMIKO | Pleistocene caldera of SAKURA-JIMA | Ryukyu Islands & Kyushu | |
| WAKE BUTTE | Cinder cone of BACHELOR | USA (Oregon) | |
| WAKIONG | Synonym of MAKIAN | Halmahera | |
| WAKKA | Synonym of ILIBOLENG | Lesser Sunda Islands | |
| WAKOTO-OYAKOTU | Dome of KUTCHARO | Hokkaido | |
| WALANG | Synonym of WAYANG-WINDU | Java | |
| WALDAU | Crater of CAMEROON | Africa (western) | |
| WALDSDORFER | Maar of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| WALELANG | Crater of SEMPU | Sulawesi | |
| WALKOUT CREEK | Cone of EDZIZA | Canada | |
| WALLENAURE [TOMPALUAN] | Crater of LOKON-EMPUNG | Sulawesi | |
| WALLIS ISLANDS | Shield volcanoes | Holocene | Samoan & Wallis Islands |
| WALO | Thermal Feature of SULU RANGE | New Britain | |
| WALTER PENK, CERRO | Synonym of TIPAS | Northern Chile, Bolivia & Argentina | |
| WAMBU ISLAND [VANBU ISLAND] | Cone of MUNDUA | New Britain | |
| WANGI, GUNUNG | Dome of PENANGGUNGAN | Java | |
| WANGKONG | Dome of MURIA | Java | |
| WANGORE | Synonym of BOLA | New Britain | |
| WAPI LAVA FIELD | Shield volcano | Radiocarbon | USA (Idaho) |
| WARA, WAI | Thermal Feature of POCO LEOK | Lesser Sunda Islands | |
| WARAMUNG PLANTATION | Thermal Feature of AMBITLE | New Ireland | |
| WARGESS | Tuff cone of BARRIER, THE | Africa (eastern) | |
| WARIRANG | Crater of GALUNGGUNG | Java | |
| WARM RIVER BUTTE | Dome of YELLOWSTONE | USA (Wyoming) | |
| WARM SPRINGS DOME | Dome of VALLES CALDERA | USA (New Mexico) | |
| WARRENHELP, MT. | Cone of NEWER VOLCANICS PROV | Australia | |
| WARRNAMBOOL, MT. | Tuff ring of NEWER VOLCANICS PROV | Australia | |
| WARTGESBERG | Cone of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| WARUDANI-YAMA | Stratovolcano of YAKE-DAKE | Honshu | |
| WASHIBA-IKE | Crater of WASHIBA-KUMONOTAIRA | Honshu | |
| WASHIBA-KUMONOTAIRA | Shield volcanoes | Tephrochronology | Honshu |
| WASHIGA-MINE | Stratovolcano of ASO | Ryukyu Islands & Kyushu | |
| WASHINGTON, MT. | Dome of NABUKELEVU | Fiji Islands | |
| WASHIO-DAKE | Dome of IBUSUKI VOLCANIC FIELD | Ryukyu Islands & Kyushu | |
| WASHUNGWE | Cone of NYIRAGONGO | Africa (central) | |
| WASIBA-KUMONOTAIRA | Synonym of WASHIBA-KUMONOTAIRA | Honshu | |
| WASSILJEW [LAOHEISHAN] | Cone of WUDALIANCHI | China (eastern) | |
| WASUREZUNO-YAMA | Synonym of ZAO | Honshu | |
| WATALUMA HILL | Cone of GOODENOUGH | New Guinea & D'Entrecasteaux Islands | |
| WATANGAN, GUNUNG | Cone of TENGGER CALDERA | Java | |
| WATCHMAN, THE | Cone of CRATERS OF THE MOON | USA (Idaho) | |
| WATERHOUSE, MT. | Cone of ANTIPODES ISLAND | Pacific Ocean (southern) | |
| WATOM ISLAND | Cone of RABAUL | New Britain | |
| WATT MOUNTAIN | Synonym of WATT, MORNE | West Indies | |
| WATT, MORNE | Stratovolcanoes | Historical | West Indies |
| WATU, GUNUNG | Cone of SUNDORO | Java | |
| WATUSUMBUL | Dome of DIENG VOLCANIC COMPLEX | Java | |
| WAU-EN-NAMUS | Caldera | Holocene? | Africa (northern) |
| WAW AN NAMOUS | Synonym of WAU-EN-NAMUS | Africa (northern) | |
| WAWOLIKA, WOLO | Crater of INIELIKA | Lesser Sunda Islands | |
| WAYANG-WINDU | Lava dome | Fumarolic | Java |
| WAZIN TAUNG | Cone of LOWER CHINDWIN | Southeast Asia | |
| WEAMBI | Cone of CAMEROON | Africa (western) | |
| WEATHERBOARD HILL | Cone of NEWER VOLCANICS PROV | Australia | |
| WEBBER NUNATAK | Cone of HUDSON MOUNTAINS | Antarctica & South Sandwich Islands | |
| WEDON, GUNUNG | Cone of ARJUNO-WELIRANG | Java | |
| WEINFELDER | Maar of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| WEISHAN | Cone of WUDALIANCHI | China (eastern) | |
| WEJER | Synonym of VEER | Kamchatka Peninsula | |
| WEKUI, PUU | Cone of MAUNA KEA | Hawaiian Islands | |
| WELCKER | Stratovolcano of GARBUNA GROUP | New Britain | |
| WELIRANG | Stratovolcano of ARJUNO-WELIRANG | Java | |
| WELIRANG, KAWAH | Crater of KARANG | Java | |
| WELL BAY HOT SPRING | Thermal Feature of SABA | West Indies | |
| WELLEYS ISLAND | Synonym of HODSON | Antarctica & South Sandwich Islands | |
| WELLINGTON, MT. | Cone of AUCKLAND FIELD | New Zealand | |
| WELLS GRAY-CLEARWATER | Cinder cones | Dendrochronology | Canada |
| WENG-CHUAN [WENGJUAN] | Cone of LONGGANG GROUP | China (eastern) | |
| WENGJUAN | Cone of LONGGANG GROUP | China (eastern) | |
| WENJAMINOW | Synonym of VENIAMINOF | Alaska Peninsula | |
| WENSAORO | Crater of SURETAMATAI | Vanuatu | |
| WESLEY ROCK | Synonym of METIS SHOAL | Tonga Islands | |
| WESSELOW | Synonym of MAKUSHIN | Aleutian Islands | |
| WEST CABRIT | Dome of DIABLES, MORNE AUX | West Indies | |
| WEST CRATER | Crater of WHITE ISLAND | New Zealand | |
| WEST CRATER | Crater of WRANGELL | Alaska (eastern) | |
| WEST CRATER | Crater of RAINIER | USA (Washington) | |
| WEST CRATER | Volcanic field | Radiocarbon | USA (Washington) |
| WEST CRATER [CRATER LAKE] | Crater of RUAPEHU | New Zealand | |
| WEST DOME | Dome of ANIAKCHAK | Alaska Peninsula | |
| WEST DOME [PA HILL] | Dome of WHALE ISLAND | New Zealand | |
| WEST EIFEL VOLCANIC FIELD | Maars | Radiocarbon | Western Europe |
| WEST HILL | Cone of ST. MICHAEL | Alaska (western) | |
| WEST LOSOLAVA | Cone of GAUA | Vanuatu | |
| WEST MAAR | Maar of UKINREK MAARS | Alaska Peninsula | |
| WEST PROSPECT PEAK | Shield volcano of LASSEN VOLCANIC CENTER | USA (California) | |
| WEST SAKUKAN | Cinder cone of UDOKAN PLATEAU | Russia (southeastern) | |
| WEST THUMB | Pleistocene caldera of YELLOWSTONE | USA (Wyoming) | |
| WEST TWIN CRATER | Maar of DIAMOND CRATERS | USA (Oregon) | |
| WEST UMBOI ISLAND | Synonym of UMBOI | Northeast of New Guinea | |
| WEST VENT | Shield volcano of TUYA VOLCANIC FIELD | Canada | |
| WEST-MATTHEW | Cone of MATTHEW ISLAND | Pacific Ocean (southwestern) | |
| WESTDAHL | Stratovolcano ? | Historical | Aleutian Islands |
| WESTERN CRATER | Crater of EREBUS | Antarctica & South Sandwich Islands | |
| WESTERN DOME | Dome of OKATAINA | New Zealand | |
| WESTERN VICTORIA VOLC FIELD | Synonym of NEWER VOLCANICS PROV | Australia | |
| WETALTH RIDGE | Cone of SPECTRUM RANGE | Canada | |
| WHAKAARI | Synonym of WHITE ISLAND | New Zealand | |
| WHAKAMARU | Pleistocene caldera of MAROA | New Zealand | |
| WHAKAPAKA | Cone of RUAPEHU | New Zealand | |
| WHAKAPAPATARINGA | Dome of MAROA | New Zealand | |
| WHAKAPOUNGAKAU | Dome of OKATAINA | New Zealand | |
| WHAKAREWAREWA | Thermal Feature of ROTORUA | New Zealand | |
| WHALE ISLAND | Complex volcano | Pleistocene-Fumarolic | New Zealand |
| WHANGAREI | Cinder cones | Holocene? | New Zealand |
| WHATITIRI | Shield volcano of WHANGAREI | New Zealand | |
| WHITE CHUCK | Cinder cone of GLACIER PEAK | USA (Washington) | |
| WHITE CREEK | Cinder cone of SATAH MOUNTAIN | Canada | |
| WHITE ISLAND | Stratovolcanoes | Historical | New Zealand |
| WHITE MOUNTAIN | Synonym of KILIMANJARO | Africa (eastern) | |
| WHITE MOUNTAIN | Dome of BLACK ROCK DESERT | USA (Utah) | |
| WHITE MOUNTAIN HOT SPRINGS [MAMMOTH H.S.] | Thermal Feature of YELLOWSTONE | USA (Wyoming) | |
| WHITE RIVER | Synonym of CHURCHILL | Alaska (eastern) | |
| WHITE ROCK | Dome of ARAYAT | Luzon | |
| WHITEHORSE BLUFFS | Cone of WELLS GRAY-CLEARWATER | Canada | |
| WHITFORD'S SOLFATARA | Thermal Feature of SURETAMATAI | Vanuatu | |
| WHITMORE HOT SPRINGS | Thermal Feature of LONG VALLEY | USA (California) | |
| WHITNEY BUTTE | Cone of MEDICINE LAKE | USA (California) | |
| WHITON, MT. | Synonym of WOLF | Galápagos Islands | |
| WIDADAREN | Cone of IJEN | Java | |
| WIDODAREN [ARJUNO] | Stratovolcano of ARJUNO-WELIRANG | Java | |
| WIDODAREN, GUNUNG | Cinder cone of TENGGER CALDERA | Java | |
| WIDU | Synonym of GAROVE | New Britain | |
| WILCOX | Stratovolcano of SEGUAM | Aleutian Islands | |
| WILHELMPLATAET | Caldera of BOUVET | Atlantic Ocean (southern) | |
| WILIS | Stratovolcano | Holocene | Java |
| WILLIAM, MT. | Dome of ST. CATHERINE | West Indies | |
| WILLIAMS | Cinder cone of EDZIZA | Canada | |
| WILLIAMS CRATER | Crater of CRATER LAKE | USA (Oregon) | |
| WILLIAMS, MT. | Synonym of DARWIN | Galápagos Islands | |
| WILLOW BUTTE | Cone of NEWBERRY | USA (Oregon) | |
| WILLOW PARK | Dome of YELLOWSTONE | USA (Wyoming) | |
| WILSON BUTTE | Dome of INYO CRATERS | USA (California) | |
| WINDU | Twin volcano of WAYANG-WINDU | Java | |
| WINDWARD ISLAND | Cone of ANTIPODES ISLAND | Pacific Ocean (southern) | |
| WINE | Synonym of ILYINSKY | Kamchatka Peninsula | |
| WINGOL | Stratovolcano of MOTLAV | Vanuatu | |
| WINGORU [GORU] | Crater of MUNDUA | New Britain | |
| WIRI MOUNTAIN [MANUREWA] | Cone of AUCKLAND FIELD | New Zealand | |
| WISDOM, LAKE | Caldera of LONG ISLAND | Northeast of New Guinea | |
| WISSOKE | Synonym of VISOKE | Africa (central) | |
| WITORI | Caldera of PAGO | New Britain | |
| WITU | Synonym of GAROVE | New Britain | |
| WIZARD ISLAND | Cinder cone of CRATER LAKE | USA (Oregon) | |
| WOEARLILI (WOELOER, WOELOER) | Synonym of WURLALI | Banda Sea | |
| WOEROENG, KAWAH [KAWAH WURUNG] | Crater of IJEN | Java | |
| WOHUSHAN | Cone of WUDALIANCHI | China (eastern) | |
| WOLF | Shield volcano | Historical | Galápagos Islands |
| WOLFSBEUEL | Cone of WEST EIFEL VOLCANIC FIELD | Western Europe | |
| WOLKBERG | Cone of PRINCE EDWARD ISLAND | Indian Ocean (southern) | |
| WOLO | See proper name (e.g. LEGA, WOLO) | Indonesian for MT. | |
| WOLO BOBO | Stratovolcano of INIERIE | Lesser Sunda Islands | |
| WOLOKROKO [ILITEBULELE] | Cone of ILILABALEKAN | Lesser Sunda Islands | |
| WONJUTSCHIJ CHREBET | Synonym of KSUDACH | Kamchatka Peninsula | |
| WOODFORD | Cinder cone of SAN QUINTIN VOLCANIC FIELD | México | |
| WOOSANTAPALIPLIP | Cone of AMBRYM | Vanuatu | |
| WOOSANTAPALIPLIP | Cone of AMBRYM | Vanuatu | |
| WOOTTEN'S CONE [NE CH'E DDHAWA] | Cone of FORT SELKIRK | Canada | |
| WORO, KAWAH | Thermal Feature of MERAPI | Java | |
| WORRI [KRUMMEL] | Stratovolcano of GARBUNA GROUP | New Britain | |
| WOTTEN WAVEN | Pleistocene caldera of TROIS PITONS, MORNE | West Indies | |
| WRANGELL | Shield volcano | Historical | Alaska (eastern) |
| WU-TA-LIEN-CH'IH | Synonym of WUDALIANCHI | China (eastern) | |
| WUARLAPNA, GUNUNG | Dome of SERUA | Banda Sea | |
| WUDALIANCHI | Volcanic field | Historical | China (eastern) |
| WUDAOGOU | Cinder cone of JINGBO | China (eastern) | |
| WUISOKIJ ISLAND | Synonym of HODSON | Antarctica & South Sandwich Islands | |
| WULU WOLOR FIELD | Thermal Feature of ILIKEDEKA | Lesser Sunda Islands | |
| WULUKE SHAN | Cinder cone of KUNLUN VOLCANIC GROUP | China (western) | |
| WUM, LAKE | Maar of OKU VOLCANIC FIELD | Africa (western) | |
| WURLALI | Stratovolcano | Historical | Banda Sea |
| WURUNG, KAWAH | Crater of IJEN | Java | |
| WUZI | Dome of SW USANGU BASIN | Africa (eastern) | |
| WYEAST | Synonym of HOOD | USA (Oregon) | |
| XALAPASCO, CERRO | Tuff cone of SERDAN-ORIENTAL | México | |
| XALAPASQUILLO | Maar of SERDAN-ORIENTAL | México | |
| XALAPAZCO, EL | Pleistocene caldera of HUMEROS, LOS | México | |
| XALISTA | Dome of CUMBRES, LAS | México | |
| XALLIQUEHUAC | Synonym of POPOCATEPETL | México | |
| XALTEPEC | Cone of CHICHINAUTZIN | México | |
| XIANJINDAO | Unknown | Uncertain | Korea |
| XIAO-KU-SHAN [XIAOGUSHAN] | Cone of LONGGANG GROUP | China (eastern) | |
| XIAOGUSHAN | Cone of WUDALIANCHI | China (eastern) | |
| XIAOGUSHAN | Cone of LONGGANG GROUP | China (eastern) | |
| XIAOKONGSHAN | Cone of TENGCHONG | Southeast Asia | |
| XIAOKUSHAN | Cone of LONGGANG GROUP | China (eastern) | |
| XIAOLIUCHONG | Cone of TENGCHONG | Southeast Asia | |
| XIAOLONGWAN | Crater of LONGGANG GROUP | China (eastern) | |
| XIAOMIPO | Cone of TENGCHONG | Southeast Asia | |
| XIAOTUANSHAN | Cone of TENGCHONG | Southeast Asia | |
| XIAOWENGJUAN | Cone of LONGGANG GROUP | China (eastern) | |
| XIAOYANZHIFENG | Cone of CHANGBAISHAN | China (eastern) | |
| XIAOYISHAN | Cinder cone of KELUO GROUP | China (eastern) | |
| XIAOYISHAN | Cone of LONGGANG GROUP | China (eastern) | |
| XIAYILUO | Cone of TENGCHONG | Southeast Asia | |
| XIBAIZILONGWAN | Crater of LONGGANG GROUP | China (eastern) | |
| XICO | Tuff ring of CHICHINAUTZIN | México | |
| XICOMULCO | Lava cone of CHICHINAUTZIN | México | |
| XICONTLE | Cinder cone of CHICHINAUTZIN | México | |
| XIHENGDAOSHAN | Cone of LONGGANG GROUP | China (eastern) | |
| XIHUOKOU | Cinder cone of KUNLUN VOLCANIC GROUP | China (western) | |
| XIJIAODEBUSHAN | Cone of WUDALIANCHI | China (eastern) | |
| XILOA [JILOA] | Caldera of APOYEQUE | Nicaragua | |
| XILONGMENSHAN | Cone of WUDALIANCHI | China (eastern) | |
| XINANTECATL | Synonym of TOLUCA, NEVADO DE | México | |
| XINGANNANSHAN | Cone of LONGGANG GROUP | China (eastern) | |
| XISHAN | Cinder cone of KELUO GROUP | China (eastern) | |
| XITLE | Cinder cone of CHICHINAUTZIN | México | |
| XITLI [XITLE] | Cinder cone of CHICHINAUTZIN | México | |
| XOXOCOL | Cinder cone of CHICHINAUTZIN | México | |
| XOYACAN, CERRO | Cone of CHICHINAUTZIN | México | |
| XUAN LOC PLATEAU | Synonym of BAS DONG NAI | Southeast Asia | |
| YA-DAKE | Dome of UNZEN | Ryukyu Islands & Kyushu | |
| YA-PA-KANG [YABAGANG] | Cone of LONGGANG GROUP | China (eastern) | |
| YABAGANG | Cone of LONGGANG GROUP | China (eastern) | |
| YAEMA [MIZUTAMARI] | Maar of MIYAKE-JIMA | Izu, Volcano, & Mariana Islands | |
| YAGLICA DAG | Cone of KARS PLATEAU | Turkey | |
| YAHAZU-YAMA | Dome of IZU-TOBU | Honshu | |
| YAHI, JABAL | Dome of KISHB, HARRAT | Arabia | |
| YAHUARATO, CERRO | Shield volcano of MICHOACAN-GUANAJUATO | México | |
| YAIMA (YAIMAS) | Synonym of LLAIMA | Central Chile & Argentina | |
| YAKE-DAKE | Stratovolcanoes | Historical | Honshu |
| YAKE-YAMA | Synonym of NIIGATA-YAKE-YAMA | Honshu | |
| YAKE-YAMA | Synonym of AKITA-YAKE-YAMA | Honshu | |
| YAKE-YAMA | Synonym of OSORE-YAMA | Honshu | |
| YAKE-YAMA [IVAN GROZNY] | Somma volcano of GROZNY GROUP | Kuril Islands | |
| YAKI | Synonym of GORIASCHAIA SOPKA | Kuril Islands | |
| YAKI [MENSHOI BRAT] | Dome of MEDVEZHIA | Kuril Islands | |
| YAKSHA | Cinder cone of VITIM PLATEAU | Russia (southeastern) | |
| YAKUSHI-DAKE | Stratovolcano of IWATE | Honshu | |
| YAKUTSK (YAKUTSKII, YAKUTSKIJ) | Cinder cone of UDOKAN PLATEAU | Russia (southeastern) | |
| YAKUTSK (YAKUTSKII, YAKUTSKIJ) | Cinder cone of UDOKAN PLATEAU | Russia (southeastern) | |
| YALI | Lava domes | Holocene | Greece |
| YALWA ? | Synonym of JALUA | Africa (northeastern) & Red Sea | |
| YAMAKAWA | Maar of IBUSUKI VOLCANIC FIELD | Ryukyu Islands & Kyushu | |
| YAMAMIO | Maar of MIYAKE-JIMA | Izu, Volcano, & Mariana Islands | |
| YAMBO, LAKE | Maar of SAN PABLO VOLCANIC FIELD | Luzon | |
| YANA MAURAS, VOLCAN | Cinder cone of ANDAHUA-ORCOPAMPA | Perú | |
| YANAMAURAS, CERRO | Cinder cone of ANDAHUA-ORCOPAMPA | Perú | |
| YANG | Synonym of IYANG-ARGAPURA | Java | |
| YANGUDI | Complex volcano | Holocene | Africa (northeastern) & Red Sea |
| YANKICHA | Synonym of USHISHUR | Kuril Islands | |
| YANSHAN | Cinder cone of ARSHAN | China (eastern) | |
| YANTALES | Synonym of YANTELES | Southern Chile & Argentina | |
| YANTARNI | Stratovolcano | Tephrochronology | Alaska Peninsula |
| YANTELES | Stratovolcanoes | Radiocarbon | Southern Chile & Argentina |
| YAO-CHUAN-SHAN [YAOQUANSHAN] | Cone of WUDALIANCHI | China (eastern) | |
| YAOQUANSHAN | Cone of WUDALIANCHI | China (eastern) | |
| YAPOAH CRATER | Cinder cone of NORTH SISTER FIELD | USA (Oregon) | |
| YAPONCHA | Crater of SUNSET CRATER | USA (Arizona) | |
| YAR, JABAL | Volcanic field | Historical | Arabia |
| YARANGALU | Dome of CHACANA | Ecuador | |
| YASOUR (YASOWA) | Synonym of YASUR | Vanuatu | |
| YASUKAJIGAMORI | Dome of MIKURA-JIMA | Izu, Volcano, & Mariana Islands | |
| YASUR | Stratovolcano | Historical | Vanuatu |
| YATAKE | Stratovolcano of KIRISHIMA | Ryukyu Islands & Kyushu | |
| YATE | Stratovolcano | Holocene | Southern Chile & Argentina |
| YAUTEPEMES, LOS | Dome of IZTACCIHUATL | México | |
| YAVINSKY | Stratovolcano | Tephrochronology | Kamchatka Peninsula |
| YAWUSHAN | Cone of TENGCHONG | Southeast Asia | |
| YEDO PEAK | Cone of SPECTRUM RANGE | Canada | |
| YEGUADA, LA | Stratovolcano | Radiocarbon | Panamá |
| YEGUAS, LAS [SAN PEDRO] | Stratovolcano of SAN PEDRO-PELLADO | Central Chile & Argentina | |
| YELIA | Stratovolcano | Holocene? | New Guinea & D'Entrecasteaux Islands |
| YELLOW CONE | Cone of KILAUEA | Hawaiian Islands | |
| YELLOWSTONE | Calderas | Tephrochronology | USA (Wyoming) |
| YELLOWSTONE PLATEAU | Synonym of YELLOWSTONE | USA (Wyoming) | |
| YEN-PEI-SHAN [XIAOGUSHAN] | Cone of WUDALIANCHI | China (eastern) | |
| YENKAHE | Caldera of YASUR | Vanuatu | |
| YENKAHE MAIN CONE | Stratovolcano of YASUR | Vanuatu | |
| YEPOCAPA | Stratovolcano of ACATENANGO | Guatemala | |
| YERAKH, JABAL | Cone of DHAMAR, HARRAS OF | Arabia | |
| YERBABUENA, CERRO LA | Cinder cone of COMONDU-LA PURISIMA | México | |
| YEROVI, ISLA | Dome of CUICOCHA | Ecuador | |
| YERSEY | Submarine volcano ? | Uncertain | Lesser Sunda Islands |
| YEZH | Dome of BOLSHOI SEMIACHIK | Kamchatka Peninsula | |
| YI SHAN | Cinder cone of KUNLUN VOLCANIC GROUP | China (western) | |
| YI-YERRA | Thermal Feature of KOUSSI, EMI | Africa (northern) | |
| YIALI | Synonym of YALI | Greece | |
| YILANLI DAG | Dome of ERCIYES DAGI | Turkey | |
| YILANLI DAGI | Cone of HASAN DAGI | Turkey | |
| YILANOBRUGU | Crater of KARAPINAR FIELD | Turkey | |
| YILBAND DAG | Dome of ERCIYES DAGI | Turkey | |
| YILBAT | Cone of ERCIYES DAGI | Turkey | |
| YINGBEISHAN [XIAOGUSHAN] | Cone of WUDALIANCHI | China (eastern) | |
| YINGFENGLING | Stratovolcano of LEIZHOU BANDAO | Southeast Asia | |
| YIONGXING | Pyroclastic Cone of HAINAN DAO | Southeast Asia | |
| YIRRIGUE | Pleistocene caldera of TOUSSIDE, TARSO | Africa (northern) | |
| YJAKUSHATSCH | Synonym of REDOUBT | Alaska (southwestern) | |
| YOICHIZAKA | Vent of IZU-TOBU | Honshu | |
| YOJOA, LAKE | Volcanic field | Holocene | El Salvador & Honduras |
| YOKO-DAKE | Stratovolcano of KUCHINO-SHIMA | Ryukyu Islands & Kyushu | |
| YOKO-DAKE | Dome of KITA YATSUGA-TAKE | Honshu | |
| YOKOATE-JIMA | Stratovolcanoes | Historical | Ryukyu Islands & Kyushu |
| YOKOATE-SHO | Submarine vent of YOKOATE-JIMA | Ryukyu Islands & Kyushu | |
| YOKOKURA-YAMA | Stratovolcano of ZAO | Honshu | |
| YOKOTE-YAMA | Shield volcano of SHIGA | Honshu | |
| YOLOTEPEC | Dome of CUMBRES, LAS | México | |
| YOLYE, VOLCAN | Cinder cone of CARRAN-LOS VENADOS | Central Chile & Argentina | |
| YOMBA | Submarine volcano ? | Uncertain | Northeast of New Guinea |
| YOMINE-YAMA | Stratovolcano of ASO | Ryukyu Islands & Kyushu | |
| YONEKUBO | Crater of KUJU | Ryukyu Islands & Kyushu | |
| YONEMARU | Maar of SUMIYOSHI-IKE | Ryukyu Islands & Kyushu | |
| YONGBOCUO | Shield volcano of UNNAMED | China (western) | |
| YONGMEORI | Tuff ring of HALLA | Korea | |
| YORIDAI-ZAWA | Crater of MIYAKE-JIMA | Izu, Volcano, & Mariana Islands | |
| YORK | Synonym of SANTIAGO | Galápagos Islands | |
| YORO-YAMA | Synonym of FUJI | Honshu | |
| YOSUA (YOSUR) | Synonym of YASUR | Vanuatu | |
| YOTEI | Stratovolcano | Tephrochronology | Hokkaido |
| YOTSUGA-TAKE | Dome of NORIKURA | Honshu | |
| YOTUGA-TAKE [YOTSUGA-TAKE] | Dome of NORIKURA | Honshu | |
| YOUKOU | Crater of NGAOUNDERE PLATEAU | Africa (western) | |
| YOUNG ISLAND | Stratovolcano | Fumarolic | Antarctica & South Sandwich Islands |
| YOUTLKUT BUTTE | Cone of NEWBERRY | USA (Oregon) | |
| YOYOLICA, VOLCAN | Cinder cone of CHICHINAUTZIN | México | |
| YRTRI RAUDAMELSKULA | Cone of LJOSUFJOLL | Iceland (western) | |
| YU-GAMA | Crater of KUSATSU-SHIRANE | Honshu | |
| YUBA-NO-TONBU | Crater of AOGA-SHIMA | Izu, Volcano, & Mariana Islands | |
| YUBATAKE HOT SPRINGS | Thermal Feature of KUSATSU-SHIRANE | Honshu | |
| YUBI-YAMA | Dome of KUJU | Ryukyu Islands & Kyushu | |
| YUBILEINOYE | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| YUCAMANE | Stratovolcanoes | Historical | Perú |
| YUCAMANI | Synonym of YUCAMANE | Perú | |
| YUEYA SHAN | Cinder cone of KUNLUN VOLCANIC GROUP | China (western) | |
| YUFU-DAKE | Dome of TSURUMI | Ryukyu Islands & Kyushu | |
| YUFUIN | Thermal Feature of TSURUMI | Ryukyu Islands & Kyushu | |
| YUGAOKA | Vent of IZU-TOBU | Honshu | |
| YUHU-DAKE [YUFU-DAKE] | Dome of TSURUMI | Ryukyu Islands & Kyushu | |
| YUJIADASHAN | Cone of TENGCHONG | Southeast Asia | |
| YUMI-IKE | Maar of KUSATSU-SHIRANE | Honshu | |
| YUMI-ITSUKA | Cone of FUJI | Honshu | |
| YUMOTO-SHIOBARA | Fissure vent of TAKAHARA | Honshu | |
| YUMURTADAG | Cone of NEMRUT DAGI | Turkey | |
| YUMURTATEPE | Cone of NEMRUT DAGI | Turkey | |
| YUNASKA | Shield volcano | Historical | Aleutian Islands |
| YUNOHIRA | Dome of SAKURA-JIMA | Ryukyu Islands & Kyushu | |
| YUNOTANI | Dome of ASO | Ryukyu Islands & Kyushu | |
| YUNOTANI | Dome of ASO | Ryukyu Islands & Kyushu | |
| YUNOTANI-DAKE | Stratovolcano of KIRISHIMA | Ryukyu Islands & Kyushu | |
| YUNQUE, EL | Stratovolcano of ROBINSON CRUSOE | Pacific Ocean (Chilean Islands) | |
| YUNUMA | Crater of TOKACHI | Hokkaido | |
| YUPILTEPEQUE, CERRO DE | Cinder cone of CHINGO | Guatemala | |
| YUPITER | Cinder cone of TOLBACHIK | Kamchatka Peninsula | |
| YURDAWA | Shield volcano of AZAS PLATEAU | Russia (southeastern) | |
| YURIEVSKY | Cone of DZENZURSKY | Kamchatka Peninsula | |
| YURRO HONDO [LAGUNA RIO CUARTO] | Maar of POAS | Costa Rica | |
| YUSHNY | Cone of MALY SEMIACHIK | Kamchatka Peninsula | |
| YUTIAN | Synonym of KUNLUN VOLCANIC GROUP | China (western) | |
| YUYIEHU | Cone of UNNAMED | China (western) | |
| YUZAWA-YAMA | Dome of KUJU | Ryukyu Islands & Kyushu | |
| YUZHNY | Vent of KRASHENINNIKOV | Kamchatka Peninsula | |
| YUZHNY [YUSHNY] | Cone of MALY SEMIACHIK | Kamchatka Peninsula | |
| YUZHNY CHERPUK | Cone of CHERPUK GROUP | Kamchatka Peninsula | |
| YUZHNY GAMCHEN | Stratovolcano of GAMCHEN | Kamchatka Peninsula | |
| YVES ROCARD | Synonym of ROCARD | Pacific Ocean (central) | |
| YWATHA | Vent of LOWER CHINDWIN | Southeast Asia | |
| YZTACTEPETL | Synonym of IZTACCIHUATL | México | |
| ZABYTAYA, MT. | Lava cone of KLIUCHEVSKOI | Kamchatka Peninsula | |
| ZABYTYI | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| ZACAPU, VOLCANES DE | Cone of MICHOACAN-GUANAJUATO | México | |
| ZACARIAS, CERRO | Cone of IPALA | Guatemala | |
| ZACATE GRANDE, ISLA | Stratovolcano | Holocene | El Salvador & Honduras |
| ZAKURA MISAKA | Stratovolcano of TOWADA | Honshu | |
| ZAMETNY | Cinder cone of KRASHENINNIKOV | Kamchatka Peninsula | |
| ZAMOK | Dome of KSUDACH | Kamchatka Peninsula | |
| ZANETTI, MOUNT | Cinder cone of WRANGELL | Alaska (eastern) | |
| ZAO | Complex volcano | Historical | Honshu |
| ZAO SPA | Thermal Feature of ZAO | Honshu | |
| ZAO-NUMA [OKAMA] | Crater of ZAO | Honshu | |
| ZAOZERNY | Shield volcanoes | Holocene? | Kamchatka Peninsula |
| ZAPADNY | Cone of KIKHPINYCH | Kamchatka Peninsula | |
| ZAPADNY BARANY | Stratovolcano of BOLSHOI SEMIACHIK | Kamchatka Peninsula | |
| ZAPATERA | Shield volcano | Holocene | Nicaragua |
| ZAPATERA, LAGUNA DE | Maar of ZAPATERA | Nicaragua | |
| ZAPETON (ZAPATERO) | Synonym of ZAPATERA | Nicaragua | |
| ZAPOTITLAN | Synonym of ATITLAN | Guatemala | |
| ZAPOVEDNY | Synonym of KOMAROV | Kamchatka Peninsula | |
| ZAPOVEDNY [SEVERNY GAMCHEN] | Stratovolcano of GAMCHEN | Kamchatka Peninsula | |
| ZAPRETNY | Cinder cone of TOLBACHIK | Kamchatka Peninsula | |
| ZARA | Dome of ISCHIA | Italy | |
| ZARZONA, CERRO DE | Lava cone of IPALA | Guatemala | |
| ZASIPANNIE | Cinder cone of TOLBACHIK | Kamchatka Peninsula | |
| ZATOPLENNYI | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| ZAVARITSKY | Cinder cones | Radiocarbon | Kamchatka Peninsula |
| ZAVARITSKY | Fissure vent of KLIUCHEVSKOI | Kamchatka Peninsula | |
| ZAVARITZKI CALDERA | Caldera | Historical | Kuril Islands |
| ZAVODOVSKI | Stratovolcano | Historical | Antarctica & South Sandwich Islands |
| ZAWADOWSKI | Synonym of ZAVODOVSKI | Antarctica & South Sandwich Islands | |
| ZAZEN-YAMA | Dome of NIKKO-SHIRANE | Honshu | |
| ZBEV-BUNANYA | Shield volcano of UKSICHAN | Kamchatka Peninsula | |
| ZEALANDIA BANK | Stratovolcano | Fumarolic | Izu, Volcano, & Mariana Islands |
| ZEBAYIR, JEBEL | Synonym of ZUBAIR, JEBEL | Africa (northeastern) & Red Sea | |
| ZEBIB, JABAL | Tuff cone of ARHAB, HARRA OF | Arabia | |
| ZEIN UMM ARAYSH, JEBEL | Cone of BAYUDA VOLCANIC FIELD | Africa (northern) | |
| ZENGYU | Submarine volcano | Uncertain | Taiwan |
| ZENTRALNY SEMIACHIK | Stratovolcano of BOLSHOI SEMIACHIK | Kamchatka Peninsula | |
| ZENZUR | Synonym of DZENZURSKY | Kamchatka Peninsula | |
| ZEPHRYRIA | Thermal Feature of MILOS | Greece | |
| ZEUCTEPETL | Synonym of ORIZABA, PICO DE | México | |
| ZEUTONGEI | Synonym of LEUTONGEY | Kamchatka Peninsula | |
| ZHANJIANG | Cone of LEIZHOU BANDAO | Southeast Asia | |
| ZHELTAYA | Dome of UZON | Kamchatka Peninsula | |
| ZHELTAYA SOPKA | Cone of KIKHPINYCH | Kamchatka Peninsula | |
| ZHELTOVSKAIA, SOPKA | Synonym of ZHELTOVSKY | Kamchatka Peninsula | |
| ZHELTOVSKY | Stratovolcano | Historical | Kamchatka Peninsula |
| ZHELTYI | Stratovolcano of ASACHA | Kamchatka Peninsula | |
| ZHUPANOVSKAIA, SOPKA | Synonym of ZHUPANOVSKY | Kamchatka Peninsula | |
| ZHUPANOVSKY | Compound volcano | Historical | Kamchatka Peninsula |
| ZHUZISHAN | Stratovolcano of TATUN GROUP | Taiwan | |
| ZIGOKU [JIGOKU] | Crater of ON-TAKE | Honshu | |
| ZIGOKU [JIGOKU] | Thermal Feature of OSORE-YAMA | Honshu | |
| ZIGOKU [TREZUBETZ] | Somma volcano of KOLOKOL GROUP | Kuril Islands | |
| ZIGOKU-NO-OANA [JIGOKU-NO-OANA] | Crater of HAKU-SAN | Honshu | |
| ZIMINA | Stratovolcanoes | Holocene | Kamchatka Peninsula |
| ZIN, JABAL | Stratovolcano of ARHAB, HARRA OF | Arabia | |
| ZINAKA-YAMA [JINAKA-YAMA] | Dome of NII-JIMA | Izu, Volcano, & Mariana Islands | |
| ZINI | Dome of KOS | Greece | |
| ZITACUARO, HOYO DE | Crater of ZITACUARO-VALLE DE BRAVO | México | |
| ZITACUARO-VALLE DE BRAVO | Caldera | Ar/Ar | México |
| ZIZO-DAKE [JIZO-DAKE] | Dome of AKAGI | Honshu | |
| ZMEYA | Crater of KOSTAKAN | Kamchatka Peninsula | |
| ZOCEYUCA, CERRO | Cinder cone of CHICHINAUTZIN | México | |
| ZOE | Cinder cone of FOURNAISE, PITON DE LA | Indian Ocean (western) | |
| ZOO-DAKE | Synonym of ZAO | Honshu | |
| ZOOMIE | Synonym of OKMOK | Aleutian Islands | |
| ZOYAZAL, VOLCAN | Cone of CHICHINAUTZIN | México | |
| ZUBAIR, JEBEL | Shield volcano | Historical | Africa (northeastern) & Red Sea |
| ZUBCHATKA | Stratovolcano of BOLSHOI SEMIACHIK | Kamchatka Peninsula | |
| ZUGAR | Synonym of ZUKUR | Africa (northeastern) & Red Sea | |
| ZUKUR | Shield volcano | Holocene | Africa (northeastern) & Red Sea |
| ZUNI-BANDERA | Volcanic field | Anthropology | USA (New Mexico) |
| ZUNIL | Dome of SANTO TOMAS | Guatemala | |
| ZUNIL GEOTHERMAL FIELD | Thermal Feature of ALMOLONGA | Guatemala | |
| ZURN PEAK | Cone of TONEY MOUNTAIN | Antarctica & South Sandwich Islands | |
| ZURQUI | Stratovolcano of BARVA | Costa Rica | |
| ZUWAYR, JABAL | Vent of KISHB, HARRAT | Arabia | |
| ZVEZDA | Cinder cone of TOLBACHIK | Kamchatka Peninsula | |
| ZWAVELBERG | Synonym of LEWOTOLO | Lesser Sunda Islands | |
| ZYANOO [JANOO] | Cone of ASO | Ryukyu Islands & Kyushu | |
| ZYOGORO-YAMA [JOGO-YAMA] | Dome of KOZU-SHIMA | Izu, Volcano, & Mariana Islands | |