Principal Officers and Chiefs of Mission, by year: 1848

Note: Career Foreign Service appointees are asterisked.

• Appleton, John (1815-1864)
  • Chief Clerk (1848)
  • Chargé d'Affaires, Bolivia (1848-1849)
  • Assistant Secretary of State (1857-1860)
  • Envoy Extraordinary and Minister Plenipotentiary, Russia (1860-1861)
• Bagby, Arthur Pendleton (1794-1858)
  • Envoy Extraordinary and Minister Plenipotentiary, Russia (1848-1849)
• Bancroft, George (1800-1891)
  • Envoy Extraordinary and Minister Plenipotentiary, United Kingdom (1846-1849)
  • Envoy Extraordinary and Minister Plenipotentiary, Germany (1867)
  • Envoy Extraordinary and Minister Plenipotentiary, Germany (1871-1874)
• Barton, Seth (1795-1850)
  • Chargé d'Affaires, Chile (1847-1849)
• Bidlack, Benjamin A. (1804-1849)
  • Chargé d'Affaires, Colombia (1845-1849)
• Clemson, Thomas Green (1807-1888)
  • Chargé d'Affaires, Belgium (1844-1851)
• Clifford, Nathan (1803-1881)
  • Envoy Extraordinary and Minister Plenipotentiary, Mexico (1848-1849)
• Buchanan, James (1791-1868)
  • Envoy Extraordinary and Minister Plenipotentiary, Russia (1832-1833)
  • Secretary of State (1845-1849)
  • Envoy Extraordinary and Minister Plenipotentiary, United Kingdom (1853-1856)
• Carr, Dabney Smith (1802-1854)
  • Minister Resident, Turkey (1843-1849)
• Davezac (D'Avezac), Auguste Genevieve Valentin (1780-1851)
  • Chargé d'Affaires, Netherlands (1831-1839)
  • Chargé d'Affaires, Netherlands (1845-1850)
• Davis, John Wesley (1799-1859)
  • Commissioner, China (1848-1850)
• Donelson, Andrew Jackson (1799-1871)
  • Chargé d'Affaires, Texas (1844-1845)
  • Envoy Extraordinary and Minister Plenipotentiary, Germany (1846-1849)
  • Envoy Extraordinary and Minister Plenipotentiary, Germany (1848-1849)
• Derrick, William S. (?-1852)
  • Secretary of State ad interim (1843)
  • Chief Clerk (1843-1844)
  • Chief Clerk (1845)
  • Chief Clerk (1847-1848)
  • Chief Clerk (1848-1852)
• Ellsworth, Henry William (1814-1864)
  • Chargé d'Affaires, Sweden (1845-1861)
• Flenniken, Robert P. (1804-1879)
  • Chargé d'Affaires, Denmark (1847-1849)
• Harris, William Alexander (1805-1864)
  • Chargé d'Affaires, Argentina (1846-1851)
• Hise, Elijah (1802-1867)
  • Chargé d'Affaires, Guatemala (1848-1849)
• Hopkins, George Washington (1804-1861)
  • Chargé d'Affaires, Portugal (1847-1849)
• Ingersoll, Ralph Isaacs (1789-1872)
  • Envoy Extraordinary and Minister Plenipotentiary, Russia (1846-1848)
• Martin, Jacob L. (?-1848)
  • Chief Clerk (1840-1841)
  • Secretary of State ad interim (1841)
  • Chargé d'Affaires, Holy See (1848)
• McCauley, Daniel Smith (?-1852)
  • Agent/Consul General, Egypt (1848-1852)
• McLane, Louis (1786-1857)
  • Envoy Extraordinary and Minister Plenipotentiary, United Kingdom (1829-1831)
  • Secretary of State (1833-1834)
  • Envoy Extraordinary and Minister Plenipotentiary, United Kingdom (1845-1849)
• Livingston, Van Brugh (1792-1868)
  • Chargé d'Affaires, Ecuador (1848-1849)
• Niles, Nathaniel (1791-1869)
  • Chargé d'Affaires, Italy (1848-1850)
• Rowan, John (1773-1853)
  • Chargé d'Affaires, Two Sicilies (1848-1849)
• Saunders, Romulus Mitchell (1791-1867)
  • Envoy Extraordinary and Minister Plenipotentiary, Spain (1846-1849)
• Shields, Benjamin Glover (1808-?)
  • Chargé d'Affaires, Venezuela (1845-1850)
• Stiles, William Henry (1808-1865)
  • Chargé d'Affaires, Austria (1845-1849)
• Tod, David (1805-1868)
  • Envoy Extraordinary and Minister Plenipotentiary, Brazil (1847-1851)