# List of ambassadors of the United States from Ohio

| 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 1984-1987: Ambassador to Jordan |
| Davis Eugene Boster | | | 1974-1976: Ambassador to Bangladesh 1976-1979: Ambassador to Guatemala |
| Thomas D. Boyatt | | | 1978-1980: Ambassador to Burkina Faso 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 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 1937-1939: Ambassador to Panama 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 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 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 1901-1902: Ambassador to Portugal |
| Stephen Low | | | 1976-1979: Ambassador to Zambia 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 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 1937-1940: Ambassador to the Dominican Republic 1940-1943: Ambassador to Peru 1943-1945: Ambassador to Portugal 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 1978-1980: Ambassador to Poland |
| Robert C. Schenck | | | 1851-1853: Ambassador to Brazil 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 1995–present: Ambassador to Congo (Kinshasa) |
| Robert Peet Skinner | | | 1931-1933: Ambassador to Estonia, Latvia, and Lithuania 1926-1932: Ambassador to Greece 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 1902-1906: Ambassador to Austria 1897-1899: Ambassador to Belgium |
| Peter J. Sullivan | | | 1867-1869: Ambassador to Colombia |
| Alphonso Taft | 1810-1891 | Republican | 1882-1884: Ambassador to Austria 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 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 |