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Principal Officers and Chiefs of Mission, by Name: c

Note: Career Foreign Service appointees are asterisked.

  • Cabaniss, William (1938-)
    • Ambassador Extraordinary and Plenipotentiary, Czech Republic (2003-2006)
  • *Cabot, John Moors (1901-1981)
    • Envoy Extraordinary and Minister Plenipotentiary, Finland (1950-1952)
    • Ambassador Extraordinary and Plenipotentiary, Pakistan (1952)
    • Assistant Secretary of State for Western Hemisphere Affairs (1953-1954)
    • Ambassador Extraordinary and Plenipotentiary, Sweden (1954-1957)
    • Ambassador Extraordinary and Plenipotentiary, Colombia (1957-1959)
    • Ambassador Extraordinary and Plenipotentiary, Brazil (1959-1961)
    • Ambassador Extraordinary and Plenipotentiary, Poland (1962-1965)
  • Cabrera, Cesar Benito (1947-)
    • Ambassador Extraordinary and Plenipotentiary, Mauritius (2006-2009)
    • Ambassador Extraordinary and Plenipotentiary, Seychelles (2006-2009)
  • Cadwalader, John Lambert (1836-1914)
    • Assistant Secretary of State (1874-1877)
  • *Caffery, Jefferson (1886-1974)
    • Envoy Extraordinary and Minister Plenipotentiary, El Salvador (1926-1928)
    • Envoy Extraordinary and Minister Plenipotentiary, Colombia (1928-1933)
    • Ambassador Extraordinary and Plenipotentiary, Cuba (1934-1937)
    • Ambassador Extraordinary and Plenipotentiary, Brazil (1937-1944)
    • Ambassador Extraordinary and Plenipotentiary, France (1944-1949)
    • Ambassador Extraordinary and Plenipotentiary, Egypt (1949-1955)
    • Chargé d'Affaires ad interim, Greece (no date on record)
    • Assistant Secretary of State (1933)
  • Cain, James (1957-)
    • Ambassador Extraordinary and Plenipotentiary, Denmark (2005-2009)
  • Caldwell, John Curtis (1833-1912)
    • Minister Resident, Paraguay (1874)
    • Minister Resident, Uruguay (1874)
    • Chargé d'Affaires, Paraguay (1876-1882)
    • Chargé d'Affaires, Uruguay (1876-1882)
  • *Caldwell, John Kenneth (1881-1982)
    • Minister Resident/Consul General, Ethiopia (1943)
    • Envoy Extraordinary and Minister Plenipotentiary, Ethiopia (1943-1945)
  • Caldwell, John Lawrence (1875-1922)
    • Envoy Extraordinary and Minister Plenipotentiary, Iran (1914)
  • Caldwell, John Watson (1809-1896)
    • Minister Resident, Bolivia (1868-1869)
  • Caldwell, Robert Granville (1882-?)
    • Envoy Extraordinary and Minister Plenipotentiary, Portugal (1933-1937)
    • Envoy Extraordinary and Minister Plenipotentiary, Bolivia (1937-1939)
  • *Calhoun, John Archibald (1918-2000)
    • Ambassador Extraordinary and Plenipotentiary, Chad (1961-1963)
    • Ambassador Extraordinary and Plenipotentiary, Tunisia (1969-1972)
  • Calhoun, John Caldwell (1782-1850)
    • Secretary of State (1844-1845)
  • Calhoun, William James (1848-1916)
    • Envoy Extraordinary and Minister Plenipotentiary, China (1909-1910)
  • *Callahan, Robert J. (1948-)
    • Ambassador Extraordinary and Plenipotentiary, Nicaragua (2008-2011)
  • Cambreleng, Churchill Caldom (1786-1862)
    • Envoy Extraordinary and Minister Plenipotentiary, Russia (1840-1841)
  • Cameron, Simon (1799-1889)
    • Envoy Extraordinary and Minister Plenipotentiary, Russia (1862)
  • Campbell, George Washington (1769-1848)
    • Envoy Extraordinary and Minister Plenipotentiary, Russia (1818-1820)
  • Campbell, James Fromhart (1912-)
    • Ambassador Extraordinary and Plenipotentiary, El Salvador (1974-1976)
  • Campbell, James Hepburn (1820-1895)
    • Minister Resident, Sweden (1864-1867)
    • Minister Resident, Colombia (1866)
  • *Campbell, John (?-)
    • Ambassador Extraordinary and Plenipotentiary, Nigeria (2004)
  • Campbell, Kurt M. (?-)
    • Assistant Secretary of State for East Asian and Pacific Affairs (2009)
  • Campbell, Lewis Davis (1811-1882)
    • Envoy Extraordinary and Minister Plenipotentiary, Mexico (1866)
  • *Campbell, Martha Larzelere (1949-)
    • Ambassador Extraordinary and Plenipotentiary, Marshall Islands (2009)
  • *Canavan, Katherinine Hubay (1949-)
    • Ambassador Extraordinary and Plenipotentiary, Lesotho (1998-2001)
    • Director of the Foreign Service Institute (2001-2005)
    • Ambassador Extraordinary and Plenipotentiary, Botswana (2005-2008)
  • *Cannon, Cavendish Wells (1895-1962)
    • Ambassador Extraordinary and Plenipotentiary, Yugoslavia (1947-1949)
    • Envoy Extraordinary and Minister Plenipotentiary, Syria (1950-1952)
    • Ambassador Extraordinary and Plenipotentiary, Portugal (1952-1953)
    • Ambassador Extraordinary and Plenipotentiary, Greece (1953-1956)
    • Ambassador Extraordinary and Plenipotentiary, Morocco (1956-1958)
  • Capen, Richard Goodwin (1934-)
    • Ambassador Extraordinary and Plenipotentiary, Spain (1992-1993)
  • Capps, Edward (1866-1950)
    • Envoy Extraordinary and Minister Plenipotentiary, Greece (1920)
    • Envoy Extraordinary and Minister Plenipotentiary, Montenegro (1920)
  • Cardwell, John (?-?)
    • Agent/Consul General, Egypt (1885-1889)
  • *Cargo, William Ira (1917-2005)
    • Director of the Policy Planning (1969-1973)
    • Ambassador Extraordinary and Plenipotentiary, Nepal (1973-1976)
  • *Carle, Robert J. (1924-)
    • Chargé d'Affaires ad interim ((Jan 1975-Aug 1978))
  • Carlile, John Snyder (1817-1878)
    • Minister Resident, Sweden (Not commissioned; nomination first confirmed and then reconsidered by the Senate, with no final action taken.)
  • Carlisle, Samuel S. (?-?)
    • Minister Resident/Consul General, Bolivia (1887-1889)
  • *Carlson, Brian E. (1947-)
    • Ambassador Extraordinary and Plenipotentiary, Latvia (2001-2004)
  • *Carlson, Delmar Richard (1918-)
    • Ambassador Extraordinary and Plenipotentiary, Guyana (1966-1969)
  • *Carlson, Harry Edwin (1886-1960)
    • Chargé d'Affaires ad interim, Estonia (the Legation in Tallinn was established Jun 30, 1930 with Harry E. Carlson as Chargé d'Affaires ad interim)
  • Carlson, Reynold Erland (1912-1993)
    • Ambassador Extraordinary and Plenipotentiary, Colombia (1966-1969)
  • Carlson, Richard W. (1941-)
    • Ambassador Extraordinary and Plenipotentiary, Seychelles (1991-1992)
  • *Carlucci, Frank Charles (1930-)
    • Ambassador Extraordinary and Plenipotentiary, Portugal (1974-1978)
  • Carmen, Gerald P. (1930-)
    • Representative of the U.S.A. to the European Office of the United Nations (Geneva) (1984-1986)
  • Carmichael, William (?-1795)
    • Chargé d'Affaires, Spain (1790-1794)
  • Carmody, Carol Jones (1942-)
    • Representative of the U.S.A. on the Council of the International Civil Aviation Organization (Montreal) (1994-1999)
  • Carnahan, Albert Sidney Johnson (1897-1968)
    • Ambassador Extraordinary and Plenipotentiary, Sierra Leone (1961-1963)
  • *Carney, Timothy Michael (1944-)
    • Ambassador Extraordinary and Plenipotentiary, Sudan (1995)
    • Ambassador Extraordinary and Plenipotentiary, Haiti (1997-1999)
  • Carpenter, David Gordon (1947-)
    • Assistant Secretary of State for Diplomatic Security (1998-2002)
  • Carpenter, Fred Warner (1873-1957)
    • Envoy Extraordinary and Minister Plenipotentiary, Morocco (1910-1912)
    • Envoy Extraordinary and Minister Plenipotentiary, Thailand (1912-1913)
  • Carpenter, Isaac White (1893-?)
    • Assistant Secretary of State for Administration (1954-1955)
    • Assistant Secretary of State for Administration (1955-1957)
  • Carr, Clark Ezra (1836-1919)
    • Minister Resident/Consul General, Denmark (1889)
    • Envoy Extraordinary and Minister Plenipotentiary, Denmark (1890-1893)
  • Carr, Dabney Smith (1802-1854)
    • Minister Resident, Turkey (1843-1849)
  • Carr, Wilbur John (1870-1942)
    • Assistant Secretary of State (1924-1933)
    • Assistant Secretary of State (1933-1937)
    • Envoy Extraordinary and Minister Plenipotentiary, Czechoslovakia (1937-1939)
  • Carrington, Walter C. (1930-)
    • Ambassador Extraordinary and Plenipotentiary, Senegal (1980-1981)
    • Ambassador Extraordinary and Plenipotentiary, Nigeria (1993-1997)
  • *Carson, Johnnie (1943-)
    • Ambassador Extraordinary and Plenipotentiary, Uganda (1991-1994)
    • Ambassador Extraordinary and Plenipotentiary, Zimbabwe (1995-1997)
    • Ambassador Extraordinary and Plenipotentiary, Kenya (1999-2003)
    • Chargé d'Affaires ad interim, Mozambique (Note: Embassy Lourenco Marques (now Maputo) was opened Nov 8, 1975, with Johnnie Carson as Chargé d'Affaires ad interim. )
    • Assistant Secretary of State for African Affairs (2009)
  • Carter, George W. (?-?)
    • Minister Resident, Venezuela (1881-1882)
  • *Carter, James Garneth (1877-1949)
    • Minister Resident/Consul General, Liberia (1927)
  • Carter, John Ridgely (1862-1944)
    • Diplomatic Agent, Bulgaria (1909)
    • Envoy Extraordinary and Minister Plenipotentiary, Romania (1909)
    • Envoy Extraordinary and Minister Plenipotentiary, Yugoslavia (1909-1910)
    • Envoy Extraordinary and Minister Plenipotentiary, Bulgaria (1910)
    • Envoy Extraordinary and Minister Plenipotentiary, Romania (1910-1911)
    • Envoy Extraordinary and Minister Plenipotentiary, Yugoslavia (1910-1911)
    • Envoy Extraordinary and Minister Plenipotentiary, Argentina (1911)
  • *Carter, Philip (1959-)
    • Ambassador Extraordinary and Plenipotentiary, Guinea (2005-2008)
    • Ambassador Extraordinary and Plenipotentiary, Cote d’Ivoire (2010)
  • *Carter, William Beverly (1921-1982)
    • Ambassador Extraordinary and Plenipotentiary, Tanzania (1972-1975)
    • Ambassador Extraordinary and Plenipotentiary, Liberia (1976-1979)
    • Ambassador at Large (1979-1981)
  • Carter, William Hodding (1935-)
    • Assistant Secretary of State for Public Affairs (1977-1980)
  • Cartter, David Kellogg (1812-1887)
    • Minister Resident, Bolivia (1861)
  • Caruth, George William (1842-?)
    • Envoy Extraordinary and Minister Plenipotentiary, Portugal (1893-1897)
  • *Casey, Mary Ann (1949-)
    • Ambassador Extraordinary and Plenipotentiary, Algeria (1991-1994)
    • Ambassador Extraordinary and Plenipotentiary, Tunisia (1994-1997)
  • Casey, William Joseph (1913-)
    • Under Secretary of State for Economic, Energy, and Agricultural Affairs (1973-1974)
  • Casey, William Robert (1944-)
    • Ambassador Extraordinary and Plenipotentiary, Niger (1982-1985)
  • *Cason, James Caldwell (?-)
    • Ambassador Extraordinary and Plenipotentiary, Paraguay (2005-2008)
  • Cass, Lewis (1782-1866)
    • Envoy Extraordinary and Minister Plenipotentiary, France (1836-1842)
    • Secretary of State (1857-1860)
  • Cass, Lewis (1814-1878)
    • Chargé d'Affaires, Holy See (1849)
    • Minister Resident, Holy See (1854-1858)
  • Castle, William Richards (1878-1963)
    • Assistant Secretary of State (1927-1929)
    • Ambassador Extraordinary and Plenipotentiary, Japan (1929-1930)
    • Assistant Secretary of State (1930-1931)
    • Under Secretary of State (1931-1933)
  • Castro, Raul Hector (1916-)
    • Ambassador Extraordinary and Plenipotentiary, El Salvador (1964-1968)
    • Ambassador Extraordinary and Plenipotentiary, Bolivia (1968-1969)
    • Ambassador Extraordinary and Plenipotentiary, Argentina (1977-1980)
  • *Catlett, Don Valentine (1918-)
    • Chargé d'Affaires ad interim, Cambodia (Legation Phnom Penh was opened to the public, Nov 14, 1950, with Don V. Catlett as Chargé d'Affaires ad interim)
  • Catto, Henry Edward (1930-)
    • Ambassador Extraordinary and Plenipotentiary, El Salvador (1971-1973)
    • Chief of Protocol (1974-1976)
    • Representative of the U.S.A. to the European Office of the United Nations (Geneva) (1976-1977)
    • Ambassador Extraordinary and Plenipotentiary, United Kingdom (1989-1991)
    • Director of the U.S. Information Agency (1991)
  • *Cavanaugh, Carey (?-)
    • Chargé d'Affaires ad interim, Georgia (1992)
  • *Cavenaugh, Carey (?-)
    • Chargé d'Affaires ad interim, Ethiopia (1992)
  • *Cecil, Charles O. (1940-)
    • Ambassador Extraordinary and Plenipotentiary, Niger (1996-1999)
    • Chargé d'Affaires ad interim, Libya (2006)
  • Cejas, Paul L. (1943-)
    • Ambassador Extraordinary and Plenipotentiary, Belgium (1998-2001)
  • Celeste, Richard Frank (1937-)
    • Ambassador Extraordinary and Plenipotentiary, India (1997-2001)
  • Cellucci, Argeo Paul (1948-)
    • Ambassador Extraordinary and Plenipotentiary, Canada (2001-2005)
  • Chain, John Thomas (1934-)
    • Assistant Secretary of State for Politico-Military Affairs (1984-1985)
  • *Chamberlin, Wendy Jean (1948-)
    • Ambassador Extraordinary and Plenipotentiary, Laos (1996-1999)
    • Ambassador Extraordinary and Plenipotentiary, Pakistan (2001-2002)
  • Chambers, Anne Cox (1919-)
    • Ambassador Extraordinary and Plenipotentiary, Belgium (1977-1981)
  • Chandler, Joseph Ripley (1792-1880)
    • Minister Resident, Two Sicilies (1858)
  • *Chapin, Frederic Lincoln (1929-)
    • Ambassador Extraordinary and Plenipotentiary, Ethiopia (1978-1980)
    • Ambassador Extraordinary and Plenipotentiary, Guatemala (1981-1984)
    • Chargé d'Affaires ad interim, Chad (Embassy Fort Lamy (now N'Djamena) was established Feb 1, 1961 with Frederic L. Chapin as Chargé d'Affaires ad interim)
  • *Chapin, Selden (1899-1963)
    • Director General of the Foreign Service (1946-1947)
    • Envoy Extraordinary and Minister Plenipotentiary, Hungary (1947)
    • Ambassador Extraordinary and Plenipotentiary, Netherlands (1949-1953)
    • Ambassador Extraordinary and Plenipotentiary, Panama (1953-1955)
    • Ambassador Extraordinary and Plenipotentiary, Iran (1955-1958)
    • Ambassador Extraordinary and Plenipotentiary, Peru (1960)
  • *Chapin, Vinton (1900-1982)
    • Ambassador Extraordinary and Plenipotentiary, Luxembourg (1957-1960)
    • Ambassador Extraordinary and Plenipotentiary, Dominican Republic (1960)
  • Chapman, Bruce (1940-)
    • Representative of the U.S.A. to the Vienna Office of the United Nations (Vienna) (1985-1988)
  • Charles, Robert B. (?-?)
    • Assistant Secretary of State for International Narcotics and Law Enforcement Affairs (2003-2005)
  • *Chase, Robert Willard (1921-)
    • Chargé d'Affaires ad interim, Swaziland (Apr 1969-Aug 1971)
  • *Chaudry, Asif J. (1956-)
    • Ambassador Extraordinary and Plenipotentiary, Guyana (2008)
    • Ambassador Extraordinary and Plenipotentiary, Moldova (2008-2011)
  • *Chaveas, Peter R. (1946-)
    • Ambassador Extraordinary and Plenipotentiary, Malawi (1994-1997)
    • Ambassador Extraordinary and Plenipotentiary, Sierra Leone (2001-2004)
  • Chayes, Abram Joseph (1922-2000)
    • Legal Adviser (1961-1964)
  • *Cheek, James Richard (1936-)
    • Ambassador Extraordinary and Plenipotentiary, Sudan (1989-1992)
    • Ambassador Extraordinary and Plenipotentiary, Argentina (1993-1996)
    • Chargé d'Affaires ad interim, Ethiopia (no date on record)
  • Chellaraj, Rajkumar (1955-)
    • Assistant Secretary of State for Administration (2006-2009)
  • Cheney, Person Colby (1828-1901)
    • Envoy Extraordinary and Minister Plenipotentiary, Switzerland (1892-1893)
  • *Cheshes, Martin L. (1939-)
    • Ambassador Extraordinary and Plenipotentiary, Djibouti (1993-1996)
  • *Cheslaw, Irving Gottlieb (1921-)
    • Ambassador Extraordinary and Plenipotentiary, Trinidad and Tobago (1979-1981)
  • Chicola, Philip T. (1946-)
    • Chargé d'Affaires ad interim (served as Charge d'Affaires ad interim, November 2005-November 2006.)
  • Child, Jacob T. (?-?)
    • Minister Resident/Consul General, Thailand (1886-1891)
  • Child, Richard Washburn (1881-1935)
    • Ambassador Extraordinary and Plenipotentiary, Italy (1921-1924)
  • *Childs, James Rives (1893-1987)
    • Envoy Extraordinary and Minister Plenipotentiary, Saudi Arabia (1946)
    • Envoy Extraordinary and Minister Plenipotentiary, Yemen (1946-1950)
    • Ambassador Extraordinary and Plenipotentiary, Saudi Arabia (1949-1950)
    • Ambassador Extraordinary and Plenipotentiary, Ethiopia (1951-1953)
    • Chargé d'Affaires ad interim, Morocco (served as Chargé d'Affaires ad interim, Feb. 1941-Jun 1945.)
  • Chinn, Thomas Withers (1791-1852)
    • Chargé d'Affaires, Two Sicilies (1849)
  • Chisholm, Shirley Anita (1924-)
    • Ambassador Extraordinary and Plenipotentiary, Jamaica (Nomination withdrawn Oct 13, 1993.)
  • Choate, Joseph Hodges (1832-1917)
    • Ambassador Extraordinary and Plenipotentiary, United Kingdom (1899-1905)
  • Chorba, Timothy A. (1946-)
    • Ambassador Extraordinary and Plenipotentiary, Singapore (1994-1998)
  • *Christensen, William Harold (1909-)
    • Chargé d'Affaires ad interim, Trinidad and Tobago (The Embassy in Port-of-Spain was established on Aug 31, 1962, with William H. Christensen as Chargé d'Affaires ad interim.)
  • *Christenson, Richard A. (1945-)
    • Chargé d'Affaires ad interim, Korea (served as Chargé d'Affaires ad interim, Feb 1996-Dec 1997.)
  • Christiancy, Isaac Peckham (1812-1890)
    • Envoy Extraordinary and Minister Plenipotentiary, Peru (1879-1881)
  • Christopher, Warren Minor (1925-2011)
    • Deputy Secretary of State (1977-1981)
    • Secretary of State ad interim (1980)
    • Secretary of State ad interim (1980)
    • Secretary of State (1993-1997)
  • *Christy, Gene Burl (1948-)
    • Ambassador Extraordinary and Plenipotentiary, Brunei (2002-2005)
  • Churchwell, William Montgomery (1826-1862)
    • Minister Resident, Honduras (Not commissioned; nomination to be Minister Resident in Guatemala and Honduras not confirmed by the Senate.)
    • Minister Resident, Guatemala (Not commissioned; nominations to be Minister Resident in Guatemala and Honduras not confirmed by the Senate.)
  • Cianchette, Peter E. (1961-)
    • Ambassador Extraordinary and Plenipotentiary, Costa Rica (2008-2009)
  • *Clare, Gwen C. (1945-)
    • Ambassador Extraordinary and Plenipotentiary, Ecuador (1999-2001)
    • Chargé d'Affaires ad interim, El Salvador (no date on record)
  • Clark, Alexander (1826-1891)
    • Minister Resident/Consul General, Liberia (1890-1891)
  • *Clark, Dick Clarence (1929-)
    • Ambassador at Large (1979)
  • Clark, Edward (1906-)
    • Ambassador Extraordinary and Plenipotentiary, Australia (1965-1967)
    • Ambassador Extraordinary and Plenipotentiary, Mali (1968-1970)
    • Ambassador Extraordinary and Plenipotentiary, Gambia, The (1970-1973)
    • Ambassador Extraordinary and Plenipotentiary, Senegal (1970-1973)
  • *Clark, Gilbert Edward (1917-1984)
    • Ambassador Extraordinary and Plenipotentiary, Mali (1968-1970)
    • Ambassador Extraordinary and Plenipotentiary, Gambia, The (1970-1973)
  • *Clark, Harlan Bendell (1913-)
    • Chargé d'Affaires ad interim, Yemen ((Aug 1964-Aug 1966))
  • *Clark, Joan Margaret (1922-)
    • Director of the Office of Management Policy (1977-1979)
    • Ambassador Extraordinary and Plenipotentiary, Malta (1979-1981)
    • Director General of the Foreign Service (1981-1983)
    • Assistant Secretary of State for Consular Affairs (1983-1989)
  • *Clark, John E. (1939-)
    • Chargé d'Affaires ad interim, Saint Lucia (served as Chargé d'Affaires ad interim from Jun 1988.)
    • Chargé d'Affaires ad interim, Barbados (served as Chargé d'Affaires ad interim, Jun 1988-Nov 1990.)
  • Clark, Joshua Reuben (1871-1961)
    • Under Secretary of State (1928-1929)
    • Ambassador Extraordinary and Plenipotentiary, Mexico (1930-1933)
  • Clark, Mark Wayne (1896-1984)
    • Ambassador Extraordinary and Plenipotentiary, Holy See (Not commissioned; nomination of Oct 20, 1951, not confirmed by the Senate.)
  • *Clark, Warren (1936-)
    • Ambassador Extraordinary and Plenipotentiary, Gabon (1987-1989)
    • Ambassador Extraordinary and Plenipotentiary, Sao Tome and Principe (1987-1989)
  • *Clark, William (1930-)
    • Ambassador Extraordinary and Plenipotentiary, India (1989-1992)
    • Assistant Secretary of State for East Asian and Pacific Affairs (1992-1993)
  • Clark, William Patrick (1931-)
    • Deputy Secretary of State (1981-1982)
  • Clarke, Beverly Leonidas (1809-1860)
    • Minister Resident, Guatemala (1858-1860)
    • Minister Resident, Honduras (1858-1860)
  • *Clarke, Henry Lee (1941-)
    • Ambassador Extraordinary and Plenipotentiary, Uzbekistan (1992-1995)
  • Clarke, Richard A. (1950-)
    • Assistant Secretary of State for Politico-Military Affairs (1989-1992)
  • *Clarke, Walter Sheldon (1934-)
    • Chargé d'Affaires ad interim, Djibouti (The Embassy in Djibouti was established Jun 27, 1977, with Walter S. Clarke as Chargé d'Affaires ad interim)
  • *Clarke, William Davis (1941-)
    • Ambassador Extraordinary and Plenipotentiary, Eritrea (1998-2001)
  • Claussen, Eileen B. (1945-)
    • Assistant Secretary of State for Oceans and International Environmental and Scientific Affairs (1996-1997)
  • Clay, Brutus Junius (1847-1932)
    • Envoy Extraordinary and Minister Plenipotentiary, Switzerland (1905-1910)
  • Clay, Cassius Marcellus (1810-1903)
    • Envoy Extraordinary and Minister Plenipotentiary, Spain (1861)
    • Envoy Extraordinary and Minister Plenipotentiary, Russia (1861-1862)
    • Envoy Extraordinary and Minister Plenipotentiary, Russia (1863-1869)
  • Clay, Henry (1777-1852)
    • Secretary of State (1825-1829)
    • Envoy Extraordinary and Minister Plenipotentiary, Spain (1909-1913)
  • Clay, James Brown (1817-1864)
    • Chargé d'Affaires, Portugal (1849-1850)
  • Clay, John Randolph (1808-1885)
    • Chargé d'Affaires, Russia (1836-1837)
    • Chargé d'Affaires, Peru (1847)
    • Envoy Extraordinary and Minister Plenipotentiary, Peru (1853)
  • Clay, Thomas Hart (1803-1871)
    • Minister Resident, Nicaragua (1862-1863)
    • Minister Resident, Honduras (1863-1866)
  • Clayton, John Middleton (1796-1856)
    • Secretary of State (1849-1850)
  • Clayton, Powell (1833-1914)
    • Envoy Extraordinary and Minister Plenipotentiary, Mexico (1897)
    • Ambassador Extraordinary and Plenipotentiary, Mexico (1898-1905)
  • Clayton, William Lockhart (1880-1966)
    • Under Secretary of State for Economic, Energy, and Agricultural Affairs (1946-1947)
  • Clemson, Thomas Green (1807-1888)
    • Chargé d'Affaires, Belgium (1844-1851)
  • Cleveland, Harlan (1918-)
    • Assistant Secretary of State for International Organization Affairs (1961-1965)
    • U.S. Permanent Representative on the Council of the North Atlantic Treaty Organization (1965-1969)
  • *Cleveland, Paul Matthews (1931-)
    • Ambassador Extraordinary and Plenipotentiary, New Zealand (1985-1989)
    • Ambassador Extraordinary and Plenipotentiary, Samoa (1986-1989)
    • Ambassador Extraordinary and Plenipotentiary, Malaysia (1989-1992)
  • Clifford, Nathan (1803-1881)
    • Envoy Extraordinary and Minister Plenipotentiary, Mexico (1848-1849)
  • Cline, Ray S. (1918-)
    • Assistant Secretary of State for Intelligence and Research (1969-1973)
  • *Clingerman, John Rufus (1931-)
    • Ambassador Extraordinary and Plenipotentiary, Lesotho (1979-1981)
  • Clinton, Hillary Rodham (1947-)
    • Secretary of State (2009)
  • *Cloud, John A. (1953-)
    • Ambassador Extraordinary and Plenipotentiary, Lithuania (2006-2009)
  • *Cluverius, Wat Tyler (1934-)
    • Ambassador Extraordinary and Plenipotentiary, Bahrain (1976-1978)
  • Coats, Daniel Ray (1943-)
    • Ambassador Extraordinary and Plenipotentiary, Germany (2001-2005)
  • Cobb, Charles Elvan (1936-)
    • Ambassador Extraordinary and Plenipotentiary, Iceland (1989-1992)
  • Cobb, Sue McCourt (1937-)
    • Ambassador Extraordinary and Plenipotentiary, Jamaica (2001-2005)
  • *Cochran, Horace Merle (1892-1973)
    • Ambassador Extraordinary and Plenipotentiary, Pakistan (1949)
    • Ambassador Extraordinary and Plenipotentiary, Indonesia (1949-1953)
  • *Coe, Robert Douglas (1902-)
    • Ambassador Extraordinary and Plenipotentiary, Denmark (1953-1957)
  • *Coerr, Wymberley DeRenne (1913-1996)
    • Ambassador Extraordinary and Plenipotentiary, Uruguay (1962-1965)
    • Ambassador Extraordinary and Plenipotentiary, Ecuador (1965-1967)
  • Coggeshall, William Turner (1824-1867)
    • Minister Resident, Ecuador (1866-1867)
  • Cohen, Benjamin Victor (1894-1983)
    • Counselor (1945-1947)
  • Cohen, Bonnie R. (1942-)
    • Under Secretary of State for Management (1997-2001)
  • Cohen, Eliot A. (?-)
    • Counselor (2007-2009)
  • *Cohen, Herman Jay (1932-)
    • Ambassador Extraordinary and Plenipotentiary, Gambia, The (1977-1980)
    • Ambassador Extraordinary and Plenipotentiary, Senegal (1977-1980)
    • Assistant Secretary of State for African Affairs (1989-1993)
    • Career Ambassador (1992)
  • Colby, Bainbridge (1869-1950)
    • Secretary of State (1920-1921)
  • Cole, Charles Woolsey (1906-1978)
    • Ambassador Extraordinary and Plenipotentiary, Chile (1961-1964)
  • *Cole, Felix (1887-1969)
    • Envoy Extraordinary and Minister Plenipotentiary, Ethiopia (1945-1947)
    • Ambassador Extraordinary and Plenipotentiary, Sri Lanka (1948-1949)
  • Coleman, Frederick William Backus (1874-1947)
    • Envoy Extraordinary and Minister Plenipotentiary, Estonia (1922-1931)
    • Envoy Extraordinary and Minister Plenipotentiary, Latvia (1922-1931)
    • Envoy Extraordinary and Minister Plenipotentiary, Lithuania (1922-1931)
    • Envoy Extraordinary and Minister Plenipotentiary, Denmark (1931-1933)
  • Collier, William Miller (1867-1956)
    • Envoy Extraordinary and Minister Plenipotentiary, Spain (1905-1909)
    • Ambassador Extraordinary and Plenipotentiary, Chile (1921-1928)
  • *Collins, James Franklin (1939-)
    • Ambassador at Large (1995-1997)
    • Ambassador Extraordinary and Plenipotentiary, Russia (1996-2001)
  • Collins, Michael (1930-)
    • Assistant Secretary of State for Public Affairs (1969-1971)
  • Combs, Leslie (1852-1940)
    • Envoy Extraordinary and Minister Plenipotentiary, Guatemala (1902-1907)
    • Envoy Extraordinary and Minister Plenipotentiary, Honduras (1902-1907)
    • Envoy Extraordinary and Minister Plenipotentiary, Peru (1906-1911)
  • Comly, James Monroe Stewart (1832-1887)
    • Minister Resident, Hawaii (1877-1882)
  • Conant, James Bryant (1893-1978)
    • Ambassador Extraordinary and Plenipotentiary, Germany (1955-1957)
  • *Condayan, John (1933-)
    • Director of the Office of Foreign Missions (Served as Acting Director, Jan 1988-Jun 1989; a nomination of Sep 16, 1988, was not acted upon by the Senate. Harry W. Porter III served as Acting Director, Jun 1989-Mar 1990 and Jul 1992-May 1993.)
  • *Condon, John Peter (1920-)
    • Ambassador Extraordinary and Plenipotentiary, Fiji (1978-1980)
    • Ambassador Extraordinary and Plenipotentiary, Tonga (1979-1980)
    • Ambassador Extraordinary and Plenipotentiary, Tuvalu (1979-1980)
  • Coneway, Peter R. (1944-)
    • Ambassador Extraordinary and Plenipotentiary, Liechtenstein (2006-2008)
    • Ambassador Extraordinary and Plenipotentiary, Switzerland (2006-2008)
  • Conger, Edwin Hurd (1843-1907)
    • Envoy Extraordinary and Minister Plenipotentiary, Brazil (1890-1893)
    • Envoy Extraordinary and Minister Plenipotentiary, Brazil (1897-1898)
    • Envoy Extraordinary and Minister Plenipotentiary, China (1898-1905)
    • Ambassador Extraordinary and Plenipotentiary, Mexico (1905)
  • Conkling, Alfred (1789-1874)
    • Envoy Extraordinary and Minister Plenipotentiary, Mexico (1852-1853)
  • *Conlin, Michael M. (1928-)
    • Director of the Office of Management Policy (1979-1980)
  • Connan, Robert S. (1947-)
    • Ambassador Extraordinary and Plenipotentiary, Iceland (Nomination announced May 27, 2009 but not submitted to the Senate.)
  • *Connelly, Maura (1959-)
    • Ambassador Extraordinary and Plenipotentiary, Lebanon (2010)
  • Conrad, Charles Magill (1804-1878)
    • Secretary of State ad interim (1852)
  • *Constable, Elinor Greer (1934-)
    • Ambassador Extraordinary and Plenipotentiary, Kenya (1986-1989)
    • Assistant Secretary of State for Oceans and International Environmental and Scientific Affairs (1993-1995)
  • *Constable, Peter Dalton (1932-2000)
    • Ambassador Extraordinary and Plenipotentiary, Congo, Democratic Republic of the (1982-1984)
  • Constandy, John P. (1924-)
    • Deputy Inspector General of Foreign Assistance (1974-1976)
  • Constantinou, Clay (1951-)
    • Ambassador Extraordinary and Plenipotentiary, Luxembourg (1994-1999)
  • *Cook, Frances D. (1945-)
    • Ambassador Extraordinary and Plenipotentiary, Burundi (1980-1983)
    • Ambassador Extraordinary and Plenipotentiary, Cameroon (1989-1993)
    • Ambassador Extraordinary and Plenipotentiary, Oman (1995-1999)
  • *Cook, Frederick Bishop (1950-)
    • Ambassador Extraordinary and Plenipotentiary, Central African Republic (2007-2010)
  • Cook, Mercer (1903-1987)
    • Ambassador Extraordinary and Plenipotentiary, Niger (1961-1964)
    • Ambassador Extraordinary and Plenipotentiary, Senegal (1964-1966)
    • Ambassador Extraordinary and Plenipotentiary, Gambia, The (1965-1966)
  • Cook, Willis Clifford (1874-1942)
    • Envoy Extraordinary and Minister Plenipotentiary, Venezuela (1921-1929)
  • *Cooke, Goodwin (1931-)
    • Ambassador Extraordinary and Plenipotentiary, Central African Republic (1978-1980)
  • Cooley, James (1791-1828)
    • Chargé d'Affaires, Peru (1826-1828)
  • Coolidge, John Gardner (1863-1936)
    • Envoy Extraordinary and Minister Plenipotentiary, Nicaragua (1908)
  • Coolidge, Thomas Jefferson (1831-1920)
    • Envoy Extraordinary and Minister Plenipotentiary, France (1892-1893)
  • Coombs, Frank Leslie (1853-1934)
    • Envoy Extraordinary and Minister Plenipotentiary, Japan (1892-1893)
  • Coombs, Philip Hall (1915-2006)
    • Assistant Secretary of State for Educational and Cultural Affairs (1961-1962)
  • *Coon, Carleton Stevens (1927-)
    • Ambassador Extraordinary and Plenipotentiary, Nepal (1981-1984)
  • *Coon, Jane Abell (1929-)
    • Ambassador Extraordinary and Plenipotentiary, Bangladesh (1981-1984)
  • *Cooper, James Ford (1935-)
    • Chargé d'Affaires ad interim, Grenada ((Jun 1988-Jan 1991))
  • Cooper, Jerome Gary (1936-)
    • Ambassador Extraordinary and Plenipotentiary, Jamaica (1994-1997)
  • Cooper, John Sherman (1901-1991)
    • Ambassador Extraordinary and Plenipotentiary, India (1955-1956)
    • Ambassador Extraordinary and Plenipotentiary, Nepal (1955-1956)
    • Ambassador Extraordinary and Plenipotentiary, German Democratic Republic (1974-1976)
  • Cooper, Richard Newell (1934-)
    • Under Secretary of State for Economic, Energy, and Agricultural Affairs (1977-1981)
    • Secretary of State ad interim (1980)
  • Cooper, William Prentice (1895-?)
    • Ambassador Extraordinary and Plenipotentiary, Peru (1946-1948)
  • *Corcoran, Thomas James (1920-1994)
    • Ambassador Extraordinary and Plenipotentiary, Burundi (1978-1980)
    • Chargé d'Affaires ad interim, Laos (no date on record)
  • *Corr, Edwin Gharst (1934-)
    • Ambassador Extraordinary and Plenipotentiary, Peru (1980-1981)
    • Ambassador Extraordinary and Plenipotentiary, Bolivia (1981-1985)
    • Ambassador Extraordinary and Plenipotentiary, El Salvador (1985-1988)
  • Corrigan, Francis Patrick (1881-1968)
    • Envoy Extraordinary and Minister Plenipotentiary, El Salvador (1934-1937)
    • Envoy Extraordinary and Minister Plenipotentiary, Panama (1937-1939)
    • Ambassador Extraordinary and Plenipotentiary, Venezuela (1939-1947)
  • *Corrigan, Robert Foster (1914-)
    • Ambassador Extraordinary and Plenipotentiary, Rwanda (1971-1973)
  • *Corry, Andrew Vincent (1904-1981)
    • Ambassador Extraordinary and Plenipotentiary, Sierra Leone (1964-1967)
    • Ambassador Extraordinary and Plenipotentiary, Maldives (1967)
    • Ambassador Extraordinary and Plenipotentiary, Sri Lanka (1967-1970)
  • *Cortada, James Nicholas (1914-)
    • Chargé d'Affaires ad interim, Yemen ((Feb 1963-Aug 1964))
  • Corwin, Thomas (1794-1865)
    • Envoy Extraordinary and Minister Plenipotentiary, Mexico (1861-1864)
  • Corwin, William Henry (1829-?)
    • Chargé d'Affaires ad interim, Mexico ((Apr 1864-Apr 1866))
  • Costello, William Aloysious (1904-1969)
    • Ambassador Extraordinary and Plenipotentiary, Trinidad and Tobago (1967-1969)
  • *Cottam, Howard Rex (1910-1984)
    • Ambassador Extraordinary and Plenipotentiary, Kuwait (1963-1969)
  • Cotter, Francis P. (1922-)
    • Deputy Inspector General of Foreign Assistance (1962-1963)
  • *Cotter, Michael William (1943-)
    • Ambassador Extraordinary and Plenipotentiary, Turkmenistan (1995-1998)
  • Cotton, Joseph Potter (1875-1931)
    • Under Secretary of State (1929-1931)
  • Cottrell, Jesse Samuel (1878-1944)
    • Envoy Extraordinary and Minister Plenipotentiary, Bolivia (1921-1928)
  • *Countryman, John R. (1933-)
    • Ambassador Extraordinary and Plenipotentiary, Oman (1981-1985)
  • *Courtney, William Harrison (1944-)
    • Ambassador Extraordinary and Plenipotentiary, Kazakhstan (1992-1995)
    • Ambassador Extraordinary and Plenipotentiary, Georgia (1995-1997)
  • *Covey, James P. (1944-)
    • Assistant Secretary of State for South and Central Asian Affairs (Nomination not acted upon by the Senate. Edward P. Djerejian served as Acting Assistant Secretary, Aug 24, 1992-Mar 30, 1993.)
  • *Cowal, Sally G. (1944-)
    • Ambassador Extraordinary and Plenipotentiary, Trinidad and Tobago (1991-1994)
  • Cowan, Edgar (1815-1885)
    • Envoy Extraordinary and Minister Plenipotentiary, Austria (Not commissioned; nomination rejected by the Senate.)
  • Cowen, Myron Melvin (1898-1965)
    • Ambassador Extraordinary and Plenipotentiary, Australia (1948-1949)
    • Ambassador Extraordinary and Plenipotentiary, Philippines (1949-1951)
    • Ambassador Extraordinary and Plenipotentiary, Belgium (1952-1953)
  • *Cox, Raymond Edwin (1893-)
    • Chargé d'Affaires ad interim, Norway (was serving as Chargé d'Affaires ad interim when the Legation in Oslo was closed, Jul 15, 1940)
  • Cox, Samuel Sullivan (1824-1889)
    • Envoy Extraordinary and Minister Plenipotentiary, Turkey (1885-1886)
    • Envoy Extraordinary and Minister Plenipotentiary, Austria (Not commissioned; nomination rejected by the Senate.)
  • Coxe, Macgrane (1859-1923)
    • Envoy Extraordinary and Minister Plenipotentiary, Honduras (1896)
    • Envoy Extraordinary and Minister Plenipotentiary, Guatemala (1896-1897)
  • Craig, Gregory B. (1945-)
    • Director of the Policy Planning (1997-1998)
  • *Craig, John Bruce (1945-)
    • Ambassador Extraordinary and Plenipotentiary, Algeria (1985-1988)
    • Ambassador Extraordinary and Plenipotentiary, Oman (1998-2001)
  • Cralle, Richard K. (?-?)
    • Chief Clerk (1844-1845)
  • Cramer, Michael John (1835-1898)
    • Minister Resident, Denmark (1870-1876)
    • Chargé d'Affaires, Denmark (1876-1881)
    • Chargé d'Affaires, Switzerland (1881)
    • Minister Resident/Consul General, Switzerland (1882-1885)
  • Crane, Charles Richard (1858-1939)
    • Envoy Extraordinary and Minister Plenipotentiary, China (1909)
    • Envoy Extraordinary and Minister Plenipotentiary, China (1920-1921)
  • Crane, Richard (1882-1938)
    • Envoy Extraordinary and Minister Plenipotentiary, Czechoslovakia (1919-1921)
  • Craner, Lorne W. (1959-)
    • Assistant Secretary of State for Democracy, Human Rights, and Labor (2001)
  • *Crawford, William Avery (1915-)
    • Envoy Extraordinary and Minister Plenipotentiary, Romania (1961-1962)
    • Envoy Extraordinary and Minister Plenipotentiary, Romania (1964-1965)
  • Crawford, William Harris (1772-1834)
    • Minister Plenipotentiary, France (1813)
  • *Crawford, William Rex (1928-2002)
    • Ambassador Extraordinary and Plenipotentiary, Yemen (1972-1974)
    • Ambassador Extraordinary and Plenipotentiary, Cyprus (1974-1978)
  • *Creagan, James Francis (1940-)
    • Ambassador Extraordinary and Plenipotentiary, Honduras (1996-1999)
  • *Creekmore, Marion V. (1939-)
    • Ambassador Extraordinary and Plenipotentiary, Maldives (1989-1992)
    • Ambassador Extraordinary and Plenipotentiary, Sri Lanka (1989-1992)
  • *Cretz, Gene Allan (1950-)
    • Ambassador Extraordinary and Plenipotentiary, Libya (2008-2012)
  • Cridler, Thomas Wilbur (1850-1914)
    • Third Assistant Secretary of State (1897-1901)
  • *Crigler, Trusten Frank (1935-)
    • Ambassador Extraordinary and Plenipotentiary, Rwanda (1976-1979)
    • Ambassador Extraordinary and Plenipotentiary, Somalia (1987-1990)
  • *Crimmins, John Hugh (1919-)
    • Ambassador Extraordinary and Plenipotentiary, Dominican Republic (1966-1969)
    • Ambassador Extraordinary and Plenipotentiary, Brazil (1973-1978)
  • Crocker, Chester A. (1941-)
    • Assistant Secretary of State for African Affairs (1981-1989)
  • *Crocker, Edward Savage (1895-1968)
    • Ambassador Extraordinary and Plenipotentiary, Iraq (1948-1952)
  • *Crocker, Ryan Clark (1949-)
    • Ambassador Extraordinary and Plenipotentiary, Lebanon (1990-1993)
    • Ambassador Extraordinary and Plenipotentiary, Kuwait (1994-1997)
    • Ambassador Extraordinary and Plenipotentiary, Syria (1998-2001)
    • Ambassador Extraordinary and Plenipotentiary, Pakistan (2004)
    • Career Ambassador (2004)
    • Ambassador Extraordinary and Plenipotentiary, Iraq (2007-2009)
  • *Crockett, Kennedy McCampbell (1920-)
    • Ambassador Extraordinary and Plenipotentiary, Nicaragua (1967-1970)
  • *Crockett, William James (1914-)
    • Assistant Secretary of State for Administration (1961-1963)
    • Deputy Under Secretary of State for Management (1963-1967)
  • Cromwell, James Henry Roberts (1898-1990)
    • Envoy Extraordinary and Minister Plenipotentiary, Canada (1940)
  • *Cromwell, William Kennedy (1924-)
    • Chargé d'Affaires ad interim, Botswana ((Jun 1970-Sep 1971))
  • *Cronk, Edwin Monroe (1918-)
    • Ambassador Extraordinary and Plenipotentiary, Singapore (1972-1975)
  • Crook, William Herbert (1925-1997)
    • Ambassador Extraordinary and Plenipotentiary, Australia (1968-1969)
  • Crosby, Elisha Oscar (1818-1895)
    • Minister Resident, Guatemala (1861-1864)
  • *Crosby, Oliver Sexsmith (1920-)
    • Ambassador Extraordinary and Plenipotentiary, Guinea (1977-1980)
  • *Cross, Charles Tenney (1922-)
    • Ambassador Extraordinary and Plenipotentiary, Singapore (1969-1971)
  • Crossland, John R.A. (1864-1950)
    • Minister Resident/Consul General, Liberia (1902-1903)
  • Crotty, E. William (1931-1999)
    • Ambassador Extraordinary and Plenipotentiary, Antigua and Barbuda (1998-1999)
    • Ambassador Extraordinary and Plenipotentiary, Barbados (1998-1999)
    • Ambassador Extraordinary and Plenipotentiary, Dominica (1998-1999)
    • Ambassador Extraordinary and Plenipotentiary, Grenada (1998-1999)
    • Ambassador Extraordinary and Plenipotentiary, Saint Kitts and Nevis (1998-1999)
    • Ambassador Extraordinary and Plenipotentiary, Saint Lucia (1998-1999)
    • Ambassador Extraordinary and Plenipotentiary, Saint Vincent and the Grenadines (1998-1999)
  • Crouch, Jack Dyer (1958-)
    • Ambassador Extraordinary and Plenipotentiary, Romania (2004-2005)
  • Crowder, Enoch Herbert (1859-1932)
    • Ambassador Extraordinary and Plenipotentiary, Cuba (1923-1927)
  • Crowe, Philip Kingsland (1908-1976)
    • Ambassador Extraordinary and Plenipotentiary, Sri Lanka (1953-1956)
    • Ambassador Extraordinary and Plenipotentiary, South Africa (1959-1961)
    • Ambassador Extraordinary and Plenipotentiary, Norway (1969-1973)
    • Ambassador Extraordinary and Plenipotentiary, Denmark (1973-1975)
  • Crowe, William J. (1925-)
    • Ambassador Extraordinary and Plenipotentiary, United Kingdom (1994-1997)
  • *Crowley, John Joseph (1928-1995)
    • Ambassador Extraordinary and Plenipotentiary, Suriname (1980-1981)
  • Crowley, Philip J. (?-)
    • Assistant Secretary of State for Public Affairs (2009)
  • Croxton, John Thomas (1837-1874)
    • Minister Resident, Bolivia (1872-1874)
  • Crum, William Demos (1859-1912)
    • Minister Resident/Consul General, Liberia (1910-1912)
  • Crump, William Wood (1819-1897)
    • Chargé d'Affaires, Chile (1844-1847)
  • Crumpton, Henry (?-)
    • Coordinator for Combatting Terrorism (2005-2007)
  • Cudahy, John Clarence (1887-1943)
    • Ambassador Extraordinary and Plenipotentiary, Poland (1933-1937)
    • Envoy Extraordinary and Minister Plenipotentiary, Ireland (1937-1940)
    • Ambassador Extraordinary and Plenipotentiary, Belgium (1940)
    • Envoy Extraordinary and Minister Plenipotentiary, Luxembourg (1940)
  • Culbertson, James (1938-)
    • Ambassador Extraordinary and Plenipotentiary, Netherlands (2008-2009)
  • *Culbertson, Paul Trauger (1897-1968)
    • Chargé d'Affaires ad interim, Spain ((Jun 1947-Dec 1950).)
  • Culbertson, William Smith (1884-1966)
    • Envoy Extraordinary and Minister Plenipotentiary, Romania (1925-1928)
    • Ambassador Extraordinary and Plenipotentiary, Chile (1928-1933)
  • Culver, Erastus Dean (1803-1889)
    • Minister Resident, Venezuela (1862)
  • Cumback, William (1829-1905)
    • Minister Resident, Portugal (1870)
  • *Cumming, Hugh Smith (1900-1986)
    • Ambassador Extraordinary and Plenipotentiary, Indonesia (1953-1957)
    • Assistant Secretary of State for Intelligence and Research (1957-1961)
  • Cummings, Theodore E. (1907-1982)
    • Ambassador Extraordinary and Plenipotentiary, Austria (1981-1982)
  • *Cundiff, Carl Copeland (1941-)
    • Ambassador Extraordinary and Plenipotentiary, Niger (1988-1991)
  • *Cunningham, James B. (1952-)
    • Ambassador Extraordinary and Plenipotentiary, Israel (2008)
    • Representative of the U.S.A. to the International Atomic Energy Agency (Vienna) (Nomination of Apr. 8, 2004 withdrawn Oct. 8, 2004.)
  • Curiel, Carolyn (1954-)
    • Ambassador Extraordinary and Plenipotentiary, Belize (1997-2001)
  • Curley, James Michael (1874-1958)
    • Ambassador Extraordinary and Plenipotentiary, Poland (Not commissioned; nomination withdrawn before the Senate acted upon it.)
  • Curley, Walter Joseph Patrick (1922-)
    • Ambassador Extraordinary and Plenipotentiary, Ireland (1975-1977)
    • Ambassador Extraordinary and Plenipotentiary, France (1989-1993)
  • *Curran, Brian Dean (1948-)
    • Ambassador Extraordinary and Plenipotentiary, Mozambique (1997-2000)
    • Ambassador Extraordinary and Plenipotentiary, Haiti (2000-2003)
  • Curry, Jabez Lamar Monroe (1825-1903)
    • Envoy Extraordinary and Minister Plenipotentiary, Spain (1885-1888)
  • Curtin, Andrew Gregg (1815-1894)
    • Envoy Extraordinary and Minister Plenipotentiary, Russia (1869-1872)
  • *Curtis, Charles Boyd (1878-1962)
    • Envoy Extraordinary and Minister Plenipotentiary, Dominican Republic (1929-1931)
    • Envoy Extraordinary and Minister Plenipotentiary, El Salvador (1931)
  • Curtis, James L. (1870-1917)
    • Minister Resident/Consul General, Liberia (1915-1917)
  • Curtis, Kenneth Merwin (1931-)
    • Ambassador Extraordinary and Plenipotentiary, Canada (1979-1981)
  • Cushing, Caleb (1800-1879)
    • Envoy Extraordinary and Minister Plenipotentiary, China (1843-1844)
    • Commissioner, China (1843-1844)
    • Envoy Extraordinary and Minister Plenipotentiary, Spain (1874)
  • Cushing, Courtland (1809-1856)
    • Chargé d'Affaires, Ecuador (1850-1853)
  • Cushman, John Franklin (?-1862)
    • Minister Resident, Argentina (1859-1861)
  • *Cutler, Walter Leon (1931-)
    • Ambassador Extraordinary and Plenipotentiary, Congo, Democratic Republic of the (1975-1979)
    • Ambassador Extraordinary and Plenipotentiary, Iran (1979)
    • Ambassador Extraordinary and Plenipotentiary, Tunisia (1981-1984)
    • Ambassador Extraordinary and Plenipotentiary, Saudi Arabia (1984-1987)
    • Ambassador Extraordinary and Plenipotentiary, Saudi Arabia (1988-1989)
  • *Cyr, Leo George (1909-)
    • Ambassador Extraordinary and Plenipotentiary, Rwanda (1966-1971)