Since 1789, 74 senators have served as ambassadors, and a total of 88 have served as ambassadors or held other diplomatic posts. Some diplomatic titles have been abbreviated, a key to abbreviations is below.
Name & Senate Service Dates
Title
Country
Dates as Diplomat
John Quincy Adams (1803-1808)
Minister Resident
Minister Resident
Minister Plenipotentiary
EE/MP
Netherlands
Prussia
Russia
United Kingdom
1794-1797
1797-1801
1809-1814
1815-1817
John Armstrong (1802-1804)
Warren R. Austin (1931-1804)
Arthur P. Bagby (1841-1848)
Howard Baker (1967-1984)
James Barbour (1813-1826)
Richard H. Bayard (1836-1839;
1841-1845)
Minister Plenipotentiary
Representative
EE/MP
Ambassador
EE/MP
Charge d'Affaires
France
United Nations
Russia
Japan
United Kingdom
Belgium
1804-1810
1947-1953
1848-1849
2001-2005
1828-1829
1850-1853
Thomas F. Bayard (1869-1886)
Solon Borland (1847-1853)
Wiilam E. Brock III (1971-1977)
AE/P
EE/MP
U.S. Trade Rep.
Great Britian
Central America
1893-1897
1853-1854
1981-1985
Ethan Allen Brown (1822-1825)
James Buchanan (1834-1845)
Charge d'Affaires
EE/MP
EE/MP
Brazil
Russia
United Kingdom
1830-1834
1832-1833
1853-1856
Simon Cameron (1845-1849;
1857-1861; 1867-1877)
EE/MP
Russia
1862
George W. Campbell (1811-1814;
1815-1818)
EE/MP
Russia
1818-1820
Lewis Cass (1845-1857)
Person C. Cheney (1886-1887)
Isaac P. Christiancy (1875-1879)
Richard C. Clark (1973-1979)
EE/MP
EE/MP
EE/MP
Amb. at Large
France
Switzerland
Peru
1836-1842
1892-1893
1879-1881
1979
Powell Clayton (1871-1877)
Daniel Coats (1989-1999)
John Sherman Cooper (1946-
1949; 1952-1955; 1956-1973)
EEMP, AE/P
Amb.
AE/P
AE/P
Mexico
Germany
India & Nepal
German Dem.
Republic
1897-1905
2001-2005
1995-1956
1974-1976
Thomas Corwin (1845-1850)
William H. Crawford (1807-1813)
George M. Dallas (1831-1833)
EE/MP
MP
EE/MP
EE/MP
Mexico
France
Russia
United Kingdom
1861-1864
1813-1815
1837-1839
1856-1861
John Danforth ( 1976-1995)
William L. Dayton (1842-1851)
John A. Dix (1845-1849)
Augustus C. Dodge (1848-1855)
Peter H. Dominick (1963-1975)
John H. Eaton (1818-1829)
Walter E. Edge (1919-1929)
Powhatan Ellis (1825-1832)
AE/P
EE/MP
EE/MP
EE/MP
AE/P
EE/MP
AE/P
Charge d’Affaires
EE/MP
United Nations
France
France
Spain
Switzerland
Spain
France
Mexico
Mexico
2004-2005
1861-1864
1866-1869
1855-1859
1975
1836-1840
1929-1933
1836
1839-1842
James B. Eustis (1876-1879;
1885-1891)
AE/P
France
1893-1897
Edward Everett (1853-1854)
Homer Ferguson (1943-1955)
George G. Fogg (1866-1867)
John Forsyth (1818-1819;
1829-1834)
EE/MP
AE/P
Minister Resident
Minister Plenipotentiary
United Kingdom
Philippines
Switzerland
Spain
1841-1845
1955-1956
1861-1865
1819-1823
Wyche Fowler, Jr. (1987-1993)
James S. Green (1857-1861)
John P. Hale (1847-1853;
1855-1865)
Ambassador
Charge d’Affaires
EE/MP
Saudi Arabia
New Granada*
Spain
1997-2001
1853-1854
1865-1869
Hannibal Hamlin ( 1848-1849;
1869-1881)
EE/MP
Spain
1881-1882
Edward A. Hannegan (1843-1849)
Chic Hecht (1983-1989)
Robert Hendrickson (1949-1955)
William Hunter (1811-1821)
Thomas J. Jarvis (1894-1895)
Reverdy Johnson (1845-1849;
1863-1868)
EE/MP
AE/P
AE/P
CdA, EE/MP
EE/MP
EE/MP
Prussia
The Bahamas
New Zealand
Brazil
Brazil
England
1849-1850
1989-1993
1955-1956
1834-1843
1885-1888
1868-1869
George W. Jones (1848-1859)
Kenneth B. Keating (1959-1965)
MR
AE/P
AE/P
New Granada*
India
Israel
1859-1861
1969-1972
1973-1975
Frank B. Kellogg (1917-1923)
Rufus King (1789-1796;
1813-1825)
AE/P
MP
EE/MP
Great Britain
Great Britain
United Kingdom
1923-1925
1796-1803
1825-1826
William R. King (1819-1844;
1848-1852)
EE/MP
France
1844-1846
Robert C. Krueger (1993)
Ambassador at Large
1979-1981
Ambassador
Ambassador
Burundi
Botswana
1994-1996
1996-1999
Edward Livingston (1829-1831)
Henry C. Lodge, Jr. (1937-1944;
1947-1953)
EE/MP
Representative
AE/P
Amb. at Large
France
United Nations
Vietnam
1833-1835
1953-1960
1965-1967
1967-1968
AE/P
Personal Rep.
Germany
Vatican
1968-1969
1970-1977
Michael Mansfield (1953-1977)
Mack Mattingly (1981-1987)
Gale W. McGee (1959-1977)
George McGovern (1963-1981)
AE/P
AE/P
Perm. Rep.
Ambassador
Japan
Seychelles
OAS
UN Food and
Agriculture
Agency
1977-1988
1992-1993
1977-1981
1998-2001
Louis McLane (1827-1829)
EE/MP
EE/MP
United Kingdom
United Kingdom
1829-1831
1845-1846
Walter F. Mondale (1964-1976)
James Monroe (1790-1794)
AE/P
MP
MP
Japan
France
Great Britain
1993-1996
1794-1796
1803-1807
Dwight W. Morrow (1930-1931)
Carol Moseley-Braun (1993-1999)
Daniel Patrick Moynihan (1997-2001)
Ambassador
Ambassador
AE/P
Mexico
New Zealand
India
1927-1930
1999-2001
1973-1975
Thomas W. Palmer (1883-1889)
Frank C. Partridge (1930-1931)
George H. Pendleton (1879-1885)
Samuel H. Piles (1905-1911)
Charles Pinckney (1789-1801)
William Pinkney (1819-1822)
EE/MP
EE/MP
EE/MP
EE/MP
Minister Plenipotentiary
Minister Plenipotentiary
EE/MP
Spain
Venezuela
Germany
Colombia
Spain
Great Britain
Russia
1889-1890
1893-1894
1885-1889
1922-1928
1801-1804
1808-1811
1816-1818
Miles Poindexter (1911-1932)
Matt W. Ransom (1872-1895)
William C. Rives (1832-1834;
1836-1839; 1841-1845)
AE/P
EE/MP
EE/MP
Peru
Mexico
France
1923-1928
1895-1897
1829-1832
Frederic M. Sackett (1925-1930)
Aaron A. Sargent (1873-1879)
James R. Sasser (1977-1995)
William B. Saxbe (1969-1974)
Carl Schurz (1869-1875)
James Semple (1843-1847)
Pierre Soule (1847; 1849-1853)
AE/P
EE/MP
AE/P
AE/P
EE/MP
Charge D'Affaires
EE/MP
Germany
Germany
China
India
Spain
New Granada*
Spain
1930-1933
1882-1884
1995-1999
1975-1976
1861
1837-1842
1853-1855
John P. Stockton (1865-1866;
1869-1875)
Minister Resident
Papal States
1858-1861
Richard B. Stone (1975-1980)
Ambassador at Large
1983-1984
Martin Van Buren **(1821-1828)
John Weller (1852-1857)
William Wilkins (1831-1834)
John Williams (1815-1823)
Joseph Wright (1862-1863)
EE/MP
EE/MP
EE/MP
Charge D’Affaires
EE/MP
United Kingdom
Mexico
Russia
Central America
Prussia
1831-1832
1860-1861
1834-1835
1825-1826
1857-1861
1865-1867
AE/P = Ambassador Extrodinary and Plenipotentiary
EE/MP = Envoy Extrodinary and Minister Plenipotentiary
Perm. Rep. = Permanent Representative
CdA = Charge d'Affaires
OAS = Organization of American States
* Colombia
**Nomination rejected by the Senate in January 1832 after he had begun his service.
Source: U.S. Department of State, Principal Officers of the Department og State and United States Chiefs of Mission, 1778-1990, Dept. of State Publication 9825, January 1991; news accounts.