Principal Officers and Chiefs of Mission, by Name: A

Note: Career Foreign Service appointees are asterisked.

• David Laurence Aaron (1938–)
  • Representative of the U.S.A. to the Organization for Economic Cooperation and Development (Paris) (1993–1997)
• John True Abbott (1850–1914)
  • Envoy Extraordinary and Minister Plenipotentiary, Colombia (1889–1893)
• Shirley Levoy Abbott (1924–2013)
  • Ambassador Extraordinary and Plenipotentiary, Lesotho (1984–1986)
• Tyler Abell (1932–)
  • Chief of Protocol (1968–1969)
• *Gina K. Abercrombie-Winstanley (1957–)
  • Ambassador Extraordinary and Plenipotentiary, Malta (2012–2016)
• John P. Abizaid (?–)
  • Ambassador Extraordinary and Plenipotentiary, Saudi Arabia (2019)
• Morris Berthold Abram (1918–2000)
  • Representative of the U.S.A. to the European Office of the United Nations (Geneva) (1989–1993)
• *Morton Isaac Abramowitz (1933–)
  • Ambassador Extraordinary and Plenipotentiary, Thailand (1978–1981)
  • Assistant Secretary of State for Intelligence and Research (1985–1989)
  • Career Ambassador (1989)
  • Ambassador Extraordinary and Plenipotentiary, Turkey (1989–1991)
• Elliott Abrams (1948–)
  • Assistant Secretary of State for International Organization Affairs (1981)
  • Assistant Secretary of State for Democracy, Human Rights, and Labor (1981–1985)
  • Assistant Secretary of State for Western Hemisphere Affairs (1985–1989)
• David Manker Abshire (1926–2014)
  • Assistant Secretary of State for Legislative Affairs (1970–1973)
  • U.S. Permanent Representative on the Council of the North Atlantic Treaty Organization (1983–1987)
• Dean Gooderham Acheson (1893–1971)
  • Assistant Secretary of State (1941)
  • Assistant Secretary of State for Legislative Affairs (1945)
  • Under Secretary of State (1945–1947)
  • Secretary of State (1949–1953)
• *Theodore Carter Achilles (1905–1986)
  • Ambassador Extraordinary and Plenipotentiary, Peru (1956–1960)
  • Counselor (1960–1961)
• *Ralph H. Ackerman (1892–1957)
  • Ambassador Extraordinary and Plenipotentiary, Dominican Republic (1948–1952)
• *Garret G. Ackerson Jr. (1904–1992)
  • Chargé d’Affaires ad interim, Hungary (1961)
• Hugh Gardner Ackley (1915–1998)
  • Ambassador Extraordinary and Plenipotentiary, Italy (1968–1969)
• *Charles Wallace Adair Jr. (1914–2006)
  • Ambassador Extraordinary and Plenipotentiary, Panama (1965–1969)
  • Ambassador Extraordinary and Plenipotentiary, Uruguay (1969–1972)
• Edwin Ross Adair (1907–1983)
  • Ambassador Extraordinary and Plenipotentiary, Ethiopia (1971–1974)
• *Alvin P. Adams (1942–2015)
  • Ambassador Extraordinary and Plenipotentiary, Djibouti (1983–1985)
  • Ambassador Extraordinary and Plenipotentiary, Haiti (1989–1992)
  • Ambassador Extraordinary and Plenipotentiary, Peru (1993–1996)
• Charles Adams (1845–1895)
  • Minister Resident/Consul General, Bolivia (1880–1882)
• Charles C. Adams Jr. (1947–)
  • Ambassador Extraordinary and Plenipotentiary, Finland (2015–2017)
• Charles Francis Adams (1807–1886)
  • Envoy Extraordinary and Minister Plenipotentiary, United Kingdom (1861–1868)
• David S. Adams (1961–)
  • Assistant Secretary of State for Legislative Affairs (2011–2013)
• John Adams (1735–1826)
  • Minister Plenipotentiary, Netherlands (1781–1788)
  • Minister Plenipotentiary, United Kingdom (1785–1788)
• John Quincy Adams (1767–1848)
  • Minister Resident, Netherlands (1794–1797)
  • Minister Plenipotentiary, Portugal (1796)
  • Minister Plenipotentiary, Germany (1797–1801)
  • Minister Plenipotentiary, Russia (1809–1814)
  • Envoy Extraordinary and Minister Plenipotentiary, United Kingdom (1815–1817)
  • Secretary of State (1817–1825)
• Robert Adams Jr. (1846–1906)
  • Envoy Extraordinary and Minister Plenipotentiary, Brazil (1889–1890)
  • Envoy Extraordinary and Minister Plenipotentiary, Brazil (1890)
• Samuel Clifford Adams Jr. (1920–2001)
  • Ambassador Extraordinary and Plenipotentiary, Niger (1968–1969)
• Weston Adams (1938–)
  • Ambassador Extraordinary and Plenipotentiary, Malawi (1984–1986)
• *Jonathan S. Addleton (1957–)
  • Ambassador Extraordinary and Plenipotentiary, Mongolia (2009–2012)
• Alvey Augustus Adee (1842–1924)
  • Third Assistant Secretary of State (1882–1886)
  • Second Assistant Secretary of State (1886–1924)
  • Secretary of State ad interim (1898)
  • Assistant Secretary of State (1924)
• David Adelman (1964–)
  • Ambassador Extraordinary and Plenipotentiary, Singapore (2010–2013)
• Kenneth Lee Adelman (1946–)
  • Director of the U.S. Arms Control and Disarmament Agency (1983–1987)
• Arthur Ainslie Ageton (1900–1971)
  • Ambassador Extraordinary and Plenipotentiary, Paraguay (1954–1957)
• *Orison Rudolph Aggrey (1926–2016)
  • Ambassador Extraordinary and Plenipotentiary, The Gambia (1973–1977)
  • Ambassador Extraordinary and Plenipotentiary, Senegal (1973–1977)
  • Ambassador Extraordinary and Plenipotentiary, Romania (1977–1981)
• Eduardo Aguirre (1946–)
  • Ambassador Extraordinary and Plenipotentiary, Andorra (2005–2009)
  • Ambassador Extraordinary and Plenipotentiary, Spain (2005–2009)
• Sharon Erdkamp Ahmad (1933–)
  • Ambassador Extraordinary and Plenipotentiary, The Gambia (1982)
• Stephen Akard (?–)
  • Director of the Office of Foreign Missions (2019)
  • Director General of the Foreign Service (Not commissioned; nomination of October 16, 2017 withdrawn by the president on March 20, 2018.)
• Anthony Boyce Akers (1914–1976)
  • Ambassador Extraordinary and Plenipotentiary, New Zealand (1961–1963)
• *James Elmer Akins (1926–2010)
  • Ambassador Extraordinary and Plenipotentiary, Saudi Arabia (1973–1975)
• *Cynthia Helen Akuetteh (1948–)
  • Ambassador Extraordinary and Plenipotentiary, Gabon (2014–2018)
  • Ambassador Extraordinary and Plenipotentiary, Sao Tome and Principe (2014–2018)
• Edward Albright (1873–1937)
  • Envoy Extraordinary and Minister Plenipotentiary, Finland (1933–1937)
  • Envoy Extraordinary and Minister Plenipotentiary, Costa Rica (1937)
• Madeleine Korbel Albright (1937–2022)
  • Representative of the U.S.A. to the United Nations (1993–1997)
  • Secretary of State (1997–2001)
• Roger Alden (1749–1836)
  • Chief Clerk (1790)
• Winthrop Williams Aldrich (1885–1974)
  • Ambassador Extraordinary and Plenipotentiary, United Kingdom (1953–1957)
• Donald Herman Alexander (1938–)
  • Ambassador Extraordinary and Plenipotentiary, Netherlands (Nomination of May 14, 1992, withdrawn on July 22, 1992.)
• Eben Alexander (1851–1910)
  • Envoy Extraordinary and Minister Plenipotentiary/Consul General, Romania (1893–1897)
  • Envoy Extraordinary and Minister Plenipotentiary/Consul General, Greece (1893–1897)
  • Envoy Extraordinary and Minister Plenipotentiary/Consul General, Serbia (1893–1897)
• *Leslie M. Alexander (1948–)
  • Ambassador Extraordinary and Plenipotentiary, Mauritius (1993–1996)
  • Ambassador Extraordinary and Plenipotentiary, Comoros (1993–1996)
  • Ambassador Extraordinary and Plenipotentiary, Ecuador (1996–1999)
• *Edward M. Alford (1951–)
  • Ambassador Extraordinary and Plenipotentiary, The Gambia (2012–2013)
• Frederick Moulton Alger Jr. (1907–1967)
  • Ambassador Extraordinary and Plenipotentiary, Belgium (1953–1957)
• *Theodore Allegra (?–)
  • Chargé d’Affaires ad interim (2017–2018)
• *Bernadette Mary Allen (1956–)
  • Ambassador Extraordinary and Plenipotentiary, Niger (2006–2010)
• *Craig B. Allen (1957–)
  • Ambassador Extraordinary and Plenipotentiary, Brunei (2014–2018)
• *George Venable Allen (1903–1970)
  • Ambassador Extraordinary and Plenipotentiary, Iran (1946–1948)
  • Assistant Secretary of State for Public Affairs (1948–1949)
  • Ambassador Extraordinary and Plenipotentiary, Socialist Federal Republic of Yugoslavia (1949–1953)
  • Ambassador Extraordinary and Plenipotentiary, Nepal (1953–1954)
  • Ambassador Extraordinary and Plenipotentiary, India (1953–1954)
  • Assistant Secretary of State for Near Eastern Affairs (1955–1956)
  • Ambassador Extraordinary and Plenipotentiary, Greece (1956–1957)
  • Director of the U.S. Information Agency (1957–1960)
  • Career Ambassador (1960)
  • Director of the Foreign Service Institute (1966–1968)
• Heman Allen (1779–1852)
  • Minister Plenipotentiary, Chile (1823–1827)
• Horace Newton Allen (1858–1932)
  • Minister Resident/Consul General, Korea (1897–1901)
  • Envoy Extraordinary and Minister Plenipotentiary, Korea (1901–1905)
• *Paul Humiston Alling (1896–1949)
  • Diplomatic Agent/Consul General, Morocco (1945–1947)
  • Envoy Extraordinary and Minister Plenipotentiary, Syria (1947)
  • Ambassador Extraordinary and Plenipotentiary, Pakistan (1947–1948)
• *John Moore Allison (1905–1978)
  • Assistant Secretary of State for East Asian and Pacific Affairs (1952–1953)
  • Ambassador Extraordinary and Plenipotentiary, Japan (1953–1957)
  • Ambassador Extraordinary and Plenipotentiary, Indonesia (1957–1958)
  • Ambassador Extraordinary and Plenipotentiary, Czechoslovakia (1958–1960)
• *Frank Almaguer (1945–)
  • Ambassador Extraordinary and Plenipotentiary, Honduras (1999–2002)
• Philip Henry Alston Jr. (1911–1988)
  • Ambassador Extraordinary and Plenipotentiary, Australia (1977–1981)
  • Ambassador Extraordinary and Plenipotentiary, Nauru (1979–1981)
• *Carolyn Patricia Alsup (1961–)
  • Ambassador Extraordinary and Plenipotentiary, The Gambia (2015–2018)
• Susan Coppedge Amato (1966–)
  • Ambassador at Large (2015–2017)
• Goli Ameri (1956–)
  • Assistant Secretary of State for Educational and Cultural Affairs (2008–2009)
• *J. Bruce Amstutz (1928–)
  • Chargé d’Affaires ad interim, Afghanistan (1980)
• *Jay Nicholas Anania (1959–)
  • Ambassador Extraordinary and Plenipotentiary, Suriname (2012–2015)
• William Allison Anders (1933–)
  • Ambassador Extraordinary and Plenipotentiary, Norway (1976–1977)
• Chandler Parsons Anderson (1866–1936)
  • Counselor (1912–1913)
• *David Anderson (1937–1997)
  • Ambassador Extraordinary and Plenipotentiary, Socialist Federal Republic of Yugoslavia (1981–1985)
• *G. Norman Anderson (1932–)
  • Ambassador Extraordinary and Plenipotentiary, Sudan (1986–1989)
• George Whelan Anderson Jr. (1906–1992)
  • Ambassador Extraordinary and Plenipotentiary, Portugal (1963–1966)
• Helen Eugenie Moore Anderson (1909–1997)
  • Ambassador Extraordinary and Plenipotentiary, Denmark (1949–1953)
  • Envoy Extraordinary and Minister Plenipotentiary, Bulgaria (1962–1964)
• J. Brady Anderson (1945–)
  • Ambassador Extraordinary and Plenipotentiary, Tanzania (1994–1997)
• John Alexander Anderson (1834–1892)
  • Agent/Consul General, Egypt (1891–1892)
• *L. Desaix Anderson (1936–)
  • Chargé d’Affaires ad interim, Vietnam (1997)
• Larz Anderson (1866–1937)
  • Envoy Extraordinary and Minister Plenipotentiary, Belgium (1911–1912)
  • Ambassador Extraordinary and Plenipotentiary, Japan (1912–1913)
• *Ollie Palmer Anderson (1937–2016)
  • Chargé d’Affaires, Grenada (1994)
• Rasmus Bjorn Anderson (1846–1936)
  • Minister Resident/Consul General, Denmark (1885–1889)
• Richard Clough Anderson (1788–1826)
  • Minister Plenipotentiary, Colombia (1823–1826)
• *Robert Anderson (1922–1996)
  • Ambassador Extraordinary and Plenipotentiary, Benin (1972–1974)
  • Ambassador Extraordinary and Plenipotentiary, Morocco (1976–1978)
  • Ambassador Extraordinary and Plenipotentiary, Dominican Republic (1982–1985)
• Stanton Dean Anderson (1940–)
  • Ambassador Extraordinary and Plenipotentiary, Costa Rica (Not commissioned; nomination of April 29, 1974, was not acted upon by the Senate.)
• Thomas H. Anderson Jr. (1946–)
  • Ambassador Extraordinary and Plenipotentiary, Antigua and Barbuda (1984–1986)
  • Ambassador Extraordinary and Plenipotentiary, Barbados (1984–1986)
  • Ambassador Extraordinary and Plenipotentiary, Dominica (1984–1986)
  • Ambassador Extraordinary and Plenipotentiary, Saint Vincent and the Grenadines (1984–1986)
  • Ambassador Extraordinary and Plenipotentiary, Saint Kitts and Nevis (1984–1986)
  • Ambassador Extraordinary and Plenipotentiary, Saint Lucia (1984–1986)
• Thomas Henry Anderson (1848–1916)
  • Minister Resident/Consul General, Bolivia (1889–1890)
  • Envoy Extraordinary and Minister Plenipotentiary, Bolivia (1890–1892)
• *Larry Edward Andre Jr. (1961–)
  • Ambassador Extraordinary and Plenipotentiary, Mauritania (2014–2017)
  • Ambassador Extraordinary and Plenipotentiary, Djibouti (2017)
• Anne Slaughter Andrews (1955–)
  • Ambassador Extraordinary and Plenipotentiary, Costa Rica (2009–2013)
• Christopher Columbus Andrews (1829–1922)
  • Minister Resident, Sweden (1869–1877)
  • Minister Resident, Denmark (1869)
• David Andrews (1942–)
  • Legal Adviser (1997–2000)
• *George Roberts Andrews (1932–2010)
  • Ambassador Extraordinary and Plenipotentiary, Mauritius (1983–1986)
• Stanley Andrews (1894–1994)
  • Administrator of the Technical Cooperation Administration (1952–1953)
• Benjamin Franklin Angel (1815–1894)
  • Minister Resident, Sweden (1857–1861)
• James Burrill Angell (1829–1916)
  • Envoy Extraordinary and Minister Plenipotentiary, China (1880–1881)
  • Envoy Extraordinary and Minister Plenipotentiary, Turkey (1897–1898)
• Leonore Annenberg (1918–2009)
  • Chief of Protocol (1981–1982)
• Walter H. Annenberg (1908–2002)
  • Ambassador Extraordinary and Plenipotentiary, United Kingdom (1969–1974)
• Mari Del Carmen Aponte (1946–)
  • Ambassador Extraordinary and Plenipotentiary, El Salvador (2010–2012)
  • Ambassador Extraordinary and Plenipotentiary, El Salvador (2012–2016)
  • Ambassador Extraordinary and Plenipotentiary, El Salvador (2012)
  • Permanent Representative of the U.S.A. to the Organization of American States (Washington) (Nomination of July 31, 2014, was not acted upon by the Senate. Re-nominated on July 8, 2015. Nomination returned by the Senate on January 3, 2017.)
  • Ambassador Extraordinary and Plenipotentiary, Dominican Republic (Nomination of April 28, 1998, withdrawn.)
• John Appleton (1815–1864)
  • Chargé d’Affaires, Bolivia (1848–1849)
  • Chief Clerk (1848)
  • Assistant Secretary of State (1857–1860)
  • Envoy Extraordinary and Minister Plenipotentiary, Russia (1860–1861)
• John James Appleton (1792–1864)
  • Chargé d’Affaires ad interim, Portugal (1821)
  • Chargé d’Affaires, Sweden (1826–1830)
  • Chargé d’Affaires, Portugal (Not commissioned; nomination to be Chargé d’Affaires at Rio de Janeiro rejected by the Senate.)
• Thomas Aranda Jr. (1934–)
  • Ambassador Extraordinary and Plenipotentiary, Uruguay (1981–1985)
• *Cresencio S. Arcos Jr. (1943–)
  • Ambassador Extraordinary and Plenipotentiary, Honduras (1989–1993)
• George L. Argyros Sr. (1937–)
  • Ambassador Extraordinary and Plenipotentiary, Andorra (2001–2004)
  • Ambassador Extraordinary and Plenipotentiary, Spain (2001–2004)
• *Michael R. Arietti (1947–)
  • Ambassador Extraordinary and Plenipotentiary, Rwanda (2005–2008)
• *Michael Hayden Armacost (1937–)
  • Ambassador Extraordinary and Plenipotentiary, Philippines (1982–1984)
  • Under Secretary of State for Political Affairs (1984–1989)
  • Ambassador Extraordinary and Plenipotentiary, Japan (1989–1993)
  • Secretary of State ad interim (1989)
• *Thomas H. Armbruster (1958–)
  • Ambassador Extraordinary and Plenipotentiary, Marshall Islands (2012–2016)
• Richard Lee Armitage (1945–)
  • Deputy Secretary of State (2001–2005)
  • Assistant Secretary of State for East Asian and Pacific Affairs (Nomination withdrawn.)
• *Norman Armour (1887–1982)
  • Envoy Extraordinary and Minister Plenipotentiary, Haiti (1932–1933)
  • Envoy Extraordinary and Minister Plenipotentiary, Haiti (1933–1935)
  • Envoy Extraordinary and Minister Plenipotentiary, Canada (1935–1938)
  • Ambassador Extraordinary and Plenipotentiary, Chile (1938–1939)
  • Ambassador Extraordinary and Plenipotentiary, Argentina (1939–1944)
  • Ambassador Extraordinary and Plenipotentiary, Spain (1944–1945)
  • Assistant Secretary of State for Political Affairs (1947–1948)
  • Ambassador Extraordinary and Plenipotentiary, Venezuela (1950–1951)
  • Ambassador Extraordinary and Plenipotentiary, Guatemala (1954–1955)
• Anne Legendre Armstrong (1927–2008)
  • Ambassador Extraordinary and Plenipotentiary, United Kingdom (1976–1977)
• David Armstrong (1836–1918)
  • Chargé d’Affaires, Holy See (Not commissioned; letter of credence dated April 30, 1869, but later cancelled.)
• John Armstrong (1755–1843)
  • Minister Plenipotentiary, France (1804–1810)
• Willis Coburn Armstrong (1912–1998)
  • Assistant Secretary of State for Economic, Energy, and Business Affairs (1972–1974)
• Roland Arnall (1939–2008)
  • Ambassador Extraordinary and Plenipotentiary, Netherlands (2006–2008)
• Daryl Arnold (1924–1998)
  • Ambassador Extraordinary and Plenipotentiary, Singapore (1987–1989)
• Frank Dundore Arnold (1881–1935)
  • Chargé d’Affaires ad interim, El Salvador (1921)
• Olney Arnold (1861–1916)
  • Agent/Consul General, Egypt (1913–1916)
• Bernard William Aronson (1946–)
  • Assistant Secretary of State for Western Hemisphere Affairs (1989–1993)
• *Luis E. Arreaga-Rodas (1952–)
  • Ambassador Extraordinary and Plenipotentiary, Iceland (2009–2013)
  • Ambassador Extraordinary and Plenipotentiary, Guatemala (2017–2020)
• *Alexander A. Arvizu (1958–)
  • Ambassador Extraordinary and Plenipotentiary, Albania (2010–2015)
• Alexander Asboth (1811–1868)
  • Minister Resident, Argentina (1866–1868)
  • Minister Resident, Uruguay (1867–1868)
• *Diego Cortes Asencio (1931–)
  • Ambassador Extraordinary and Plenipotentiary, Colombia (1977–1980)
  • Assistant Secretary of State for Consular Affairs (1980–1983)
  • Ambassador Extraordinary and Plenipotentiary, Brazil (1983–1986)
• Christopher C. Ashby (1946–)
  • Ambassador Extraordinary and Plenipotentiary, Uruguay (1997–2001)
• Victor Henderson Ashe (1945–)
  • Ambassador Extraordinary and Plenipotentiary, Poland (2004–2009)
• Reubin O’Donovan Askew (1928–)
  • U.S. Trade Representative (1979–1980)
• *Mark L. Asquino (1949–)
  • Ambassador Extraordinary and Plenipotentiary, Equatorial Guinea (2012–2015)
• William Waldorf Astor (1848–1919)
  • Envoy Extraordinary and Minister Plenipotentiary, Italy (1882–1885)
• *Alfred Leroy Atherton Jr. (1921–2002)
  • Assistant Secretary of State for Near Eastern Affairs (1974–1978)
  • Ambassador at Large (1978–1979)
  • Ambassador Extraordinary and Plenipotentiary, Egypt (1979–1983)
  • Career Ambassador (1981)
  • Director General of the Foreign Service (1983–1984)
• *Ray Atherton (1883–1960)
  • Chargé d’Affaires ad interim, Greece (1924)
  • Envoy Extraordinary and Minister Plenipotentiary, Bulgaria (1937–1939)
  • Envoy Extraordinary and Minister Plenipotentiary, Denmark (1939–1940)
  • Envoy Extraordinary and Minister Plenipotentiary, Luxembourg (1943)
  • Envoy Extraordinary and Minister Plenipotentiary, Canada (1943)
  • Ambassador Extraordinary and Plenipotentiary, Canada (1943–1948)
• William Hollingsworth Attwood (1919–1989)
  • Ambassador Extraordinary and Plenipotentiary, Guinea (1961–1963)
  • Ambassador Extraordinary and Plenipotentiary, Kenya (1964–1966)
• John Brian Atwood (1942–)
  • Assistant Secretary of State for Legislative Affairs (1979–1981)
  • Under Secretary of State for Management (1993)
  • Administrator of the Agency for International Development (1993)
  • Ambassador Extraordinary and Plenipotentiary, Brazil (Nomination of January 6, 1999, withdrawn on May 24, 1999.)
• Marcus Jacob (Mark Evans) Austad (1917–1988)
  • Ambassador Extraordinary and Plenipotentiary, Finland (1975–1977)
  • Ambassador Extraordinary and Plenipotentiary, Norway (1981–1984)
• Roy L. Austin (1939–)
  • Ambassador Extraordinary and Plenipotentiary, Trinidad and Tobago (2001–2009)
• Warren Robinson Austin (1877–1962)
  • Representative of the U.S.A. to the United Nations (1947–1953)
• Nicole A. Avant (1968–)
  • Ambassador Extraordinary and Plenipotentiary, The Bahamas (2009–2011)
• Benjamin Parke Avery (1828–1875)
  • Envoy Extraordinary and Minister Plenipotentiary, China (1874–1875)
• *Liliana Ayalde (1956–)
  • Ambassador Extraordinary and Plenipotentiary, Paraguay (2008–2011)
  • Ambassador Extraordinary and Plenipotentiary, Brazil (2013–2017)