{| class=wikitable
! Name !! Life dates !! Party !! Ambassadorship(s) with dates
|-
| James E. Akins || || || 1973-1975: Ambassador to Saudi Arabia
|-
| Horace N. Allen || || || 1897-1905: Ambassador to Korea
|-
| Thomas H. Anderson || || || 1889-1892: Ambassador to Bolivia
|-
| John A. Bingham || || || 1873-1885: Ambassador to Japan
|-
| Paul H. Boeker || 1938-2003 || || 1977-1980: Ambassador to Bolivia <br>1984-1987: Ambassador to Jordan
|-
| Davis Eugene Boster || || || 1974-1976: Ambassador to Bangladesh<br>1976-1979: Ambassador to Guatemala
|-
| Thomas D. Boyatt || || || 1978-1980: Ambassador to Burkina Faso<br>1980-1983: Ambassador to Colombia
|-
| Ethan Allen Brown || 1776-1852 || Democratic || 1830-1834: Ambassador to Brazil
|-
| John A. Bryan || || || 1844-1845: Ambassador to Peru
|-
| Charles R. Burrows || || || 1960-1965: Ambassador to Honduras
|-
| Patricia M. Byrne || || || 1976-1979: Ambassador to Mali<br>1979-1983: Ambassador to Burma
|-
| John W. Caldwell || || || 1868-1869: Ambassador to Bolivia
|-
| Lewis D. Campbell || || || 1866: Sworn in as ambassador to Mexico, but did not serve
|-
| David K. Cartter || || || 1861-1862: Ambassador to Bolivia
|-
| Richard F. "Dick" Celeste || 1937- || Democratic || 1997-2001: Ambassador to India
|-
| William T. Coggeshall || 1824-1867 || || 1866-1867: Ambassador to Ecuador
|-
| James M. Comly || 1832-1887 || || 1877-1882: Ambassador to Hawaii
|-
| James Cooley || || || 1826-1828: Ambassador to Peru
|-
| Frank P. Corrigan || || || 1934-1937: Ambassador to El Salvador<br>1937-1939: Ambassador to Panama<br>1939-1947: Ambassador to Venezuela
|-
| Robert Foster Corrigan || || || 1971-1973: Ambassador to Rwanda
|-
| Thomas Corwin || 1794-1865 || Whig || 1861-1864: Ambassador to Mexico
|-
| Joseph E. Denning || || || 1922-1924: Ambassador to Mongolia
|-
| John E. Dolibois || || || 1981-1985: Ambassador to Luxembourg
|-
| Edwin Dun || || || 1893-1897: Ambassador to Japan
|-
| John Arthur Ferch || || || 1985-1986: Ambassador to Honduras
|-
| George H. Flood || || || 1840-1841: Ambassador to Texas
|-
| Joseph C. Green || || || 1952-1953: Ambassador to Jordan,
|-
| Fred L. Hadsel || || || 1971-1974: Ambassador to Ghana
|-
| John Hamm || || || 1831-1833: Ambassador to Chile
|-
| Holsey G. Handyside || || || 1975-1977: Ambassador to Mauritania
|-
| Matthew E. Hanna || || || 1929-1933: Ambassador to Nicaragua<br>1933-1936: Ambassador to Guatemala
|-
| William Henry Harrison || 1773-1841 || Republican || 1828-1829: Ambassador to Colombia
|-
| Frederick Hassaurek || || || 1861-1866: Ambassador to Ecuador
|-
| Myron T. Herrick || 1854-1929 || Republican || 1912-1914, 1921-1929: Ambassador to France
|-
| J. Morton Howell || || || 1921-1927: Ambassador to Egypt
|-
| J. Klahr Huddle || || || 1947-1949: Ambassador to Burma
|-
| Joseph J. Johnson || || || 1918-1922: Ambassador to Liberia
|-
| Harmon Elwood Kirby || || || 1990-1994: Ambassador to Togo
|-
| Robert C. Kirk || || || 1862-1866: Ambassador to Argentina<br>1869-1871: Ambassador to Argentina and Uruguay
|-
| Paul Knabenshue || || || 1932-1942: Ambassador to Iraq
|-
| Foy D. Kohler || || || 1962-1966: Ambassador to Russia
|-
| Joseph Saul Kornfeld || || || 1921-1924: Ambassador to Iran (Persia)
|-
| Edward S. Little || || || 1974-1976: Ambassador to Chad
|-
| Jesse D. Locker || 1891-1955 || Republican
|| 1953-1955: Ambassador to Liberia
|-
| Francis B. Loomis || || || 1897-1901: Ambassador to Venezuela<br>1901-1902: Ambassador to Portugal
|-
| Stephen Low || || || 1976-1979: Ambassador to Zambia<br>1979-1981: Ambassador to Nigeria
|-
| Leopold Markbreit || || || 1869-1873: Ambassador to Bolivia
|-
| Edwin M. Martin || || || 1964-1968: Ambassador to Argentina
|-
| Edward E. Masters || || || 1976-1977: Ambassador to Bangladesh<br>1977-1981: Ambassador to Indonesia
|-
| Donald J. McConnell || || || 1993-1996: Ambassador to Burkina Faso
|-
| Tom McDonald || || || 1997–present: Ambassador to Zimbabwe
|-
| Roger A. McGuire || || || 1992-1995: Ambassador to Guinea-Bissau
|-
| Samuel Medary || 1801-1864 || Democratic || 1853: Sworn in as ambassador to Chile, but did not serve
|-
| Lloyd I. Miller || || || 1973-1975: Ambassador to Trinidad and Tobago
|-
| Daniel F. Mooney || || || 1914-1921: Ambassador to Paraguay
|-
| George W. Morgan || || || 1858-1861: Ambassador to Portugal
|-
| William S. Murphy || || || 1843-1844: Ambassador to Texas
|-
| Wallace Murray || || || 1935-1936: Ambassador to Iran
|-
| Edwin L. Neville || || || 1937-1940: Ambassador to Thailand
|-
| Raymond Henry Norweb || || || 1936-1937: Ambassador to Bolivia<br>1937-1940: Ambassador to the Dominican Republic<br>1940-1943: Ambassador to Peru<br>1943-1945: Ambassador to Portugal<br>1945-1948: Ambassador to Cuba
|-
| Edward F. Noyes || 1832-1890 || Republican || 1877-1881: Ambassador to France
|-
| Jefferson Patterson || || || 1956-1958: Ambassador to Uruguay
|-
| H. E. Peck || || || 1865-1867: Ambassador to Haiti
|-
| George H. Pendleton || 1825-1889 || Democratic || 1885-1889: Ambassador to Germany
|-
| Charles J. Pilliod, Jr. || || || 1986-1989: Ambassador to Mexico
|-
| William S. Rosecrans || 1819-1898 || Republican || 1868-1869: Ambassador to Mexico
|-
| Charles W. Sawyer || || || 1944-1945: Ambassador to Belgium and Luxembourg
|-
| William B. Saxbe || 1916- || Republican || 1975-1976: Ambassador to India
|-
| William E. Schaufele Jr. || || || 1969-1971: Ambassador to Burkina Faso<br>1978-1980: Ambassador to Poland
|-
| Robert C. Schenck || || || 1851-1853: Ambassador to Brazil<br>1870-1876: Ambassador to the United Kingdom
|-
| John Seys || || || 1866-1870: Ambassador to Liberia
|-
| Wilson Shannon || 1802-1877 || Democratic || 1844-1845: Ambassador to Mexico
|-
| William G. Sharp || || || 1914-1919: Ambassador to France
|-
| Samuel Shellabarger I || || || 1869-1870: Ambassador to Portugal
|-
| Daniel Howard Simpson || || || 1989-1992: Ambassador to the Central African Republic<br>1995–present: Ambassador to Congo (Kinshasa)
|-
| Robert Peet Skinner || || || 1931-1933: Ambassador to Estonia, Latvia, and Lithuania<br>1926-1932: Ambassador to Greece<br>1933-1936: Ambassador to Turkey
|-
| Carroll Sprigg || || || 1920-1921: Ambassador to Egypt
|-
| John B. Stallo || || || 1885-1889: Ambassador to Italy
|-
| David A. Starkweather || || || 1854-1847: Ambassador to Chile
|-
| Carl B. Stokes || 1927-1996 || Democratic || 1994-1995: Ambassador to the Seychelles
|-
| Bellamy Storer || || || 1899-1902: Ambassador to Spain<br>1902-1906: Ambassador to Austria<br>1897-1899: Ambassador to Belgium
|-
| Peter J. Sullivan || || || 1867-1869: Ambassador to Colombia
|-
| Alphonso Taft || 1810-1891 || Republican || 1882-1884: Ambassador to Austria<br>1884-1885: Ambassador to Russia
|-
| Richard W. Teare || || || 1993-1996: Ambassador to Papua New Guinea, the Solomon Islands, and Vanuatu
|-
| David Tod || 1805-1868 || Republican || 1847-1851: Ambassador to Brazil
|-
| Timothy Lathrop Towell || || || 1988-1991: Ambassador to Paraguay
|-
| Sandra Louise Vogelgesang || || || 1994-1997: Ambassador to Nepal
|-
| Marvin L. Warner || || || 1977-1979: Ambassador to Switzerland
|-
| Brand Whitlock || || || 1913-1914: Envoy to Belgium<br>1919-1921: Ambassador to Belgium
|-
| John N. Willys || || || 1930-1932: Ambassador to Poland
|-
| Milton A. Wolf || || || 1977-1980: Ambassador to Austria
|-
| Jonathan F. Woodside || || || 1835-1841: Ambassador to Denmark
|}
