Chiefs of Mission for Panama
- William Insco Buchanan (1853-1909)
Envoy Extraordinary and Minister Plenipotentiary (December 17, 1903-February 2, 1904) - John Barrett (1866-1938)
Envoy Extraordinary and Minister Plenipotentiary (July 22, 1904-May 13, 1905) - Charles Edward Magoon (1861-1920)
Envoy Extraordinary and Minister Plenipotentiary (August 7, 1905-September 25, 1906) - Herbert Goldsmith Squiers (1859-1911)
Envoy Extraordinary and Minister Plenipotentiary (November 8, 1906-August 3, 1909) - Robert Stockwell Reynolds Hitt (1876-1938)
Envoy Extraordinary and Minister Plenipotentiary (March 26, 1910-July 19, 1910) - Thomas Cleland Dawson (1865-1912)
Envoy Extraordinary and Minister Plenipotentiary (September 24, 1910-December 1, 1910) - Henry Percival Dodge (1870-1936)
Envoy Extraordinary and Minister Plenipotentiary (November 9, 1911-June 10, 1913) - William Jennings Price (1873-1952)
Envoy Extraordinary and Minister Plenipotentiary (October 11, 1913-December 28, 1921) - John Glover South (1873-1940)
Envoy Extraordinary and Minister Plenipotentiary (December 28, 1921-January 5, 1930) - Roy Tasco Davis (1889-1975)
Envoy Extraordinary and Minister Plenipotentiary (March 14, 1930-September 20, 1933) - Antonio Cornelius Gonzalez (1888-1965)
Envoy Extraordinary and Minister Plenipotentiary (October 11, 1933-January 9, 1935) - George Thomas Summerlin (1872-1947)
Envoy Extraordinary and Minister Plenipotentiary (December 10, 1934-) - George Thomas Summerlin (1872-1947)
Envoy Extraordinary and Minister Plenipotentiary (March 8, 1935-July 7, 1937) - Francis Patrick Corrigan (1881-1968)
Envoy Extraordinary and Minister Plenipotentiary (September 2, 1937-June 14, 1939) - William Dawson Jr. (1885-1972)
Ambassador Extraordinary and Plenipotentiary (July 14, 1939-April 21, 1941) - Edwin Carleton Wilson (1893-1972)
Ambassador Extraordinary and Plenipotentiary (May 23, 1941-September 23, 1943) - Avra Milvin Warren (1893-1957)
Ambassador Extraordinary and Plenipotentiary (June 22, 1944-January 5, 1945) - Raymond Henry Norweb (1894-1983)
Ambassador Extraordinary and Plenipotentiary (February 9, 1945-) - Frank Thomas Hines (1879-1960)
Ambassador Extraordinary and Plenipotentiary (August 17, 1945-) - Frank Thomas Hines (1879-1960)
Ambassador Extraordinary and Plenipotentiary (November 1, 1945-February 20, 1948) - Monnett Bain Davis (1893-1953)
Ambassador Extraordinary and Plenipotentiary (May 28, 1948-January 24, 1951) - John Cooper Wiley (1893-1967)
Ambassador Extraordinary and Plenipotentiary (July 25, 1951-November 27, 1953) - Selden Chapin (1899-1963)
Ambassador Extraordinary and Plenipotentiary (January 22, 1954-May 29, 1955) - Julian Fiske Harrington (1901-1984)
Ambassador Extraordinary and Plenipotentiary (August 30, 1955-July 14, 1960) - Joseph Simpson Farland (1914-2007)
Ambassador Extraordinary and Plenipotentiary (August 29, 1960-August 31, 1963) - Jack Hood Vaughn (1920-2012)
Ambassador Extraordinary and Plenipotentiary (May 6, 1964-February 27, 1965) - Charles Wallace Adair Jr. (1914-2006)
Ambassador Extraordinary and Plenipotentiary (May 13, 1965-September 6, 1969) - Robert Marion Sayre (1924-)
Ambassador Extraordinary and Plenipotentiary (October 31, 1969-March 14, 1974) - Frank Townsend Bow (1901-1972)
Ambassador Extraordinary and Plenipotentiary (September 11, 1972-) - William John Jorden (1923-2009)
Ambassador Extraordinary and Plenipotentiary (April 17, 1974-August 25, 1978) - Ambler Holmes Moss Jr. (1937-)
Ambassador Extraordinary and Plenipotentiary (October 6, 1978-July 15, 1982) - Everett Ellis Briggs (1934-)
Ambassador Extraordinary and Plenipotentiary (October 29, 1982-February 24, 1986) - Arthur H. Davis Jr. (1917-2000)
Ambassador Extraordinary and Plenipotentiary (April 4, 1986-January 3, 1990) - Deane Roesch Hinton (1923-)
Ambassador Extraordinary and Plenipotentiary (January 9, 1990-February 12, 1994) - William J. Hughes (1932-)
Ambassador Extraordinary and Plenipotentiary (November 7, 1995-October 13, 1998) - Simon Ferro (1953-)
Ambassador Extraordinary and Plenipotentiary (February 26, 1999-March 1, 2001) - Linda Ellen Watt (1951-)
Ambassador Extraordinary and Plenipotentiary (December 17, 2002-June 3, 2005) - William A. Eaton (1952-)
Ambassador Extraordinary and Plenipotentiary (September 9, 2005-July 5, 2008) - Barbara Jean Stephenson (1958-)
Ambassador Extraordinary and Plenipotentiary (August 6, 2008-July 14, 2010) - Phyllis Marie Powers (1953-)
Ambassador Extraordinary and Plenipotentiary (September 16, 2010-August 2011) - Jonathan D. Farrar (1956-)
Ambassador Extraordinary and Plenipotentiary (May 16, 2012-June 5, 2015) - John D. Feeley (1961–)
Ambassador Extraordinary and Plenipotentiary (February 16, 2016-March 9, 2018)