Principal Officers and Chiefs of Mission, by Name: H

Note: Career Foreign Service appointees are asterisked.

• Richard Nathan Haass (1951–)
  • Director of Policy Planning (2001–2003)
• *Philip Charles Habib (1920–1992)
  • Ambassador Extraordinary and Plenipotentiary, Korea (1971–1974)
  • Assistant Secretary of State for East Asian and Pacific Affairs (1974–1976)
  • Under Secretary of State for Political Affairs (1976–1978)
  • Secretary of State ad interim (1977)
• Nina Hachigian (1967–)
  • Representative of the U.S.A. to the Association of Southeast Asian Nations (Jakarta) (2014–2017)
• *Paul Hacker (1946–)
  • Chargé d’Affaires ad interim, Slovakia (1993)
• Kenneth Francis Hackett (1947–)
  • Ambassador Extraordinary and Plenipotentiary, Holy See (2013–2017)
• Green Haywood Hackworth (1883–1973)
  • Legal Adviser (1931–1946)
• Charles Brickett Haddock (1796–1861)
  • Chargé d’Affaires, Portugal (1850–1854)
• *Fred Latimer Hadsel (1916–2010)
  • Ambassador Extraordinary and Plenipotentiary, Somalia (1969–1971)
  • Ambassador Extraordinary and Plenipotentiary, Ghana (1971–1974)
• Eric Hill Hager (1918–1973)
  • Legal Adviser (1959–1961)
• William F. Hagerty IV (?–)
  • Ambassador Extraordinary and Plenipotentiary, Japan (2017–2019)
• Alexander Meigs Haig Jr. (1924–2010)
  • Secretary of State (1981–1982)
• Avril D. Haines (1969–)
  • Legal Adviser (Nomination of April 18, 2013 withdrawn on June 13, 2013. Mary McLeod has served as Acting Legal Adviser (September 1, 2013-).)
• Jacob Samils Haldeman (1827–1889)
  • Minister Resident, Sweden (1861–1864)
• John Acoming Halderman Jr. (1838–1908)
  • Minister Resident/Consul General, Thailand (1882–1885)
• Chandler Hale (1873–1951)
  • Third Assistant Secretary of State (1909–1913)
• Charles Hale (1831–1882)
  • Agent/Consul General, Egypt (1864–1870)
  • Assistant Secretary of State (1872–1873)
• *David Hale (1961–)
  • Chargé d’Affaires ad interim, Jordan (2005)
  • Ambassador Extraordinary and Plenipotentiary, Jordan (2005–2008)
  • Ambassador Extraordinary and Plenipotentiary, Lebanon (2013–2015)
  • Ambassador Extraordinary and Plenipotentiary, Pakistan (2015–2018)
  • Under Secretary of State for Political Affairs (2018)
  • Career Ambassador (2018)
• Edward Joseph Hale (1839–1922)
  • Envoy Extraordinary and Minister Plenipotentiary, Costa Rica (1913–1917)
• John Parker Hale (1806–1873)
  • Envoy Extraordinary and Minister Plenipotentiary, Spain (1865–1869)
• *Suzanne Hale (1948–)
  • Ambassador Extraordinary and Plenipotentiary, Micronesia, Federated States of (2004–2007)
• George Williford Boyce Haley (1925–2015)
  • Ambassador Extraordinary and Plenipotentiary, The Gambia (1998–2001)
• Nikki R. Haley (?–)
  • Representative of the U.S.A. to the United Nations (2017–2018)
• Allen A. Hall (?–1867)
  • Chargé d’Affaires, Venezuela (1841–1844)
  • Minister Resident, Bolivia (1863–1867)
• *Anne Hall (?–)
  • Ambassador Extraordinary and Plenipotentiary, Lithuania (2016–2019)
• Henry Cook Hall (1820–1901)
  • Minister Resident, El Salvador (1882–1883)
  • Envoy Extraordinary and Minister Plenipotentiary, El Salvador (1882–1889)
  • Minister Resident, Costa Rica (1882)
  • Envoy Extraordinary and Minister Plenipotentiary, Costa Rica (1882–1889)
  • Minister Resident, Honduras (1882)
  • Envoy Extraordinary and Minister Plenipotentiary, Honduras (1882–1889)
  • Minister Resident, Guatemala (1882)
  • Envoy Extraordinary and Minister Plenipotentiary, Guatemala (1882–1889)
  • Minister Resident, Nicaragua (1882)
  • Envoy Extraordinary and Minister Plenipotentiary, Nicaragua (1882–1889)
• Kathryn Walt Hall (1947–)
  • Ambassador Extraordinary and Plenipotentiary, Austria (1997–2001)
• Tony P. Hall (1942–)
  • U.S. Representative to the United Nations Agencies for Food and Agriculture (Rome) (2002–2006)
• *William O. Hall (1914–1977)
  • Ambassador Extraordinary and Plenipotentiary, Ethiopia (1967–1971)
  • Director General of the Foreign Service (1971–1973)
• Carol Boyd Hallett (1937–)
  • Ambassador Extraordinary and Plenipotentiary, The Bahamas (1986–1989)
• Morton H. Halperin (1938–)
  • Director of Policy Planning (1998–2001)
• Murat Halstead (1829–1908)
  • Envoy Extraordinary and Minister Plenipotentiary, Germany (Not commissioned; nomination rejected by the Senate.)
• *David Crane Halsted (1941–)
  • Ambassador Extraordinary and Plenipotentiary, Chad (1996–1999)
  • Chargé d’Affaires ad interim, Uganda ()
• Pamela K. Hamamoto (1960–)
  • Representative of the U.S.A. to the European Office of the United Nations (Geneva) (2014–2017)
• *Mark Gregory Hambley (1948–)
  • Ambassador Extraordinary and Plenipotentiary, Qatar (1989–1992)
  • Ambassador Extraordinary and Plenipotentiary, Lebanon (1993–1994)
• Fowler Hamilton (1911–1984)
  • Administrator of the Agency for International Development (1961–1962)
• James Alexander Hamilton (1788–1878)
  • Secretary of State ad interim (1829)
• *John Randle Hamilton (1944–)
  • Ambassador Extraordinary and Plenipotentiary, Peru (1999–2002)
  • Ambassador Extraordinary and Plenipotentiary, Guatemala (2002–2005)
• *Maxwell McGaughey Hamilton (1896–1957)
  • Envoy Extraordinary and Minister Plenipotentiary, Finland (1945–1947)
• *William Cowles Hamilton (1922–2015)
  • Chargé d’Affaires ad interim, Sweden (1981)
• Hannibal Hamlin (1809–1891)
  • Envoy Extraordinary and Minister Plenipotentiary, Spain (1881–1882)
• John Hamm (1777–1861)
  • Chargé d’Affaires, Chile (1830–1833)
  • Chargé d’Affaires, Guatemala (Commissioned to the Republic of Central America. Not commissioned; nomination withdrawn before the Senate acted upon it.)
• *Michael A. Hammer (1963–)
  • Assistant Secretary of State for Public Affairs (2012–2013)
  • Ambassador Extraordinary and Plenipotentiary, Chile (2014–2016)
  • Ambassador Extraordinary and Plenipotentiary, Congo (Kinshasa) (2018)
• Ogden Haggerty Hammond (1869–1956)
  • Ambassador Extraordinary and Plenipotentiary, Spain (1925–1929)
• Lloyd Nelson Hand (1929–)
  • Chief of Protocol (1965–1966)
• *William Jules Handley (1918–1979)
  • Ambassador Extraordinary and Plenipotentiary, Mali (1961–1964)
  • Ambassador Extraordinary and Plenipotentiary, Turkey (1969–1973)
• *Holsey Gates Handyside (1927–)
  • Ambassador Extraordinary and Plenipotentiary, Mauritania (1975–1977)
• Stafford Fitzgerald Haney (1969–)
  • Ambassador Extraordinary and Plenipotentiary, Costa Rica (2015–2017)
• John V. Hanford 3rd (1954–)
  • Ambassador at Large (2002–2009)
• *Dennis B. Hankins (1959–)
  • Ambassador Extraordinary and Plenipotentiary, Guinea (2015–2019)
  • Ambassador Extraordinary and Plenipotentiary, Mali (2019)
• Bayless W. Hanna (1830–1891)
  • Minister Resident/Consul General, Argentina (1885–1887)
  • Minister Resident/Consul General, Iran (1885)
  • Envoy Extraordinary and Minister Plenipotentiary, Argentina (1887–1889)
• *Matthew Elting Hanna (1873–1936)
  • Envoy Extraordinary and Minister Plenipotentiary, Nicaragua (1929–1933)
  • Envoy Extraordinary and Minister Plenipotentiary, Guatemala (1933–1936)
• John A. Hannah (1902–1991)
  • Administrator of the Agency for International Development (1969–1973)
• Edward A. Hannegan (1807–1859)
  • Envoy Extraordinary and Minister Plenipotentiary, Germany (1849–1850)
• Herbert J. Hansell (1925–2015)
  • Legal Adviser (1977–1979)
• Abraham Hanson (1818–1866)
  • Commissioner and Consul General, Liberia (1863–1866)
• Norman Hapgood (1868–1937)
  • Envoy Extraordinary and Minister Plenipotentiary, Denmark (1919)
• *D. Brent Hardt (1962–)
  • Chargé d’Affaires ad interim, Dominica (2011)
  • Chargé d’Affaires ad interim, Barbados (2011)
  • Chargé d’Affaires ad interim, Antigua and Barbuda (2011)
  • Ambassador Extraordinary and Plenipotentiary, Guyana (2011–2014)
  • Chargé d’Affaires ad interim, Grenada (2011)
  • Chargé d’Affaires ad interim, Saint Vincent and the Grenadines (2011)
  • Chargé d’Affaires ad interim, Saint Lucia (2011)
  • Chargé d’Affaires ad interim, Saint Kitts and Nevis (2011)
• *Alan M. Hardy (1934–)
  • Ambassador Extraordinary and Plenipotentiary, Equatorial Guinea (1981–1984)
• Arthur Sherburne Hardy (1847–1930)
  • Minister Resident/Consul General, Iran (1897–1899)
  • Envoy Extraordinary and Minister Plenipotentiary, Greece (1899–1901)
  • Envoy Extraordinary and Minister Plenipotentiary, Serbia (1899–1901)
  • Envoy Extraordinary and Minister Plenipotentiary, Romania (1899–1901)
  • Envoy Extraordinary and Minister Plenipotentiary, Switzerland (1900–1903)
  • Envoy Extraordinary and Minister Plenipotentiary, Spain (1902–1905)
• *Paul Julian Hare (1937–)
  • Ambassador Extraordinary and Plenipotentiary, Zambia (1985–1988)
• *Raymond Arthur Hare (1901–1994)
  • Ambassador Extraordinary and Plenipotentiary, Saudi Arabia (1950–1953)
  • Envoy Extraordinary and Minister Plenipotentiary, Yemen (1950–1953)
  • Ambassador Extraordinary and Plenipotentiary, Lebanon (1953–1954)
  • Ambassador Extraordinary and Plenipotentiary, Egypt (1956–1958)
  • Ambassador Extraordinary and Plenipotentiary, Egypt (1958–1959)
  • Envoy Extraordinary and Minister Plenipotentiary, Yemen (1959)
  • Deputy Under Secretary of State for Political Affairs (1960–1961)
  • Career Ambassador (1960)
  • Ambassador Extraordinary and Plenipotentiary, Turkey (1961–1965)
  • Assistant Secretary of State for Near Eastern Affairs (1965–1966)
• James Ward Hargrove (1922–2004)
  • Ambassador Extraordinary and Plenipotentiary, Australia (1976–1977)
  • Ambassador Extraordinary and Plenipotentiary, Nauru (1976–1977)
• *Reno Leon Harnish III (1949–)
  • Ambassador Extraordinary and Plenipotentiary, Azerbaijan (2003–2006)
• Conrad K. Harper (1940–)
  • Legal Adviser (1993–1996)
• Florence Jaffray Hurst Harriman (1870–1967)
  • Envoy Extraordinary and Minister Plenipotentiary, Norway (1937–1940)
• Pamela C. Harriman (1920–1997)
  • Ambassador Extraordinary and Plenipotentiary, France (1993–1997)
• William Averell Harriman (1891–1986)
  • Ambassador Extraordinary and Plenipotentiary, Russia (1943–1946)
  • Ambassador Extraordinary and Plenipotentiary, United Kingdom (1946)
  • Director of the Mutual Security Agency (1951–1953)
  • Assistant Secretary of State for East Asian and Pacific Affairs (1961–1963)
  • Ambassador at Large (1961)
  • Under Secretary of State for Political Affairs (1963–1965)
  • Ambassador at Large (1965–1969)
• Anthony Stephen Harrington (1941–)
  • Ambassador Extraordinary and Plenipotentiary, Brazil (1999–2001)
• George Harrington (1815–1892)
  • Minister Resident, Switzerland (1865–1869)
• *Julian Fiske Harrington (1901–1984)
  • Ambassador Extraordinary and Plenipotentiary, Panama (1955–1960)
• *Matthew Tracy Harrington (1966–)
  • Ambassador Extraordinary and Plenipotentiary, Lesotho (2014–2017)
• Addison Clay Harris (1840–1916)
  • Envoy Extraordinary and Minister Plenipotentiary, Austria (1899–1901)
• Harry B. Harris Jr. (?–)
  • Ambassador Extraordinary and Plenipotentiary, Korea (2018)
• Levett Harris (?–)
  • Chargé d’Affaires, France (1833)
• Patricia Roberts Harris (1924–1985)
  • Ambassador Extraordinary and Plenipotentiary, Luxembourg (1965–1967)
• Townsend Harris (1804–1878)
  • Minister Resident, Japan (1859–1862)
• William Alexander Harris (1805–1864)
  • Chargé d’Affaires, Argentina (1846–1851)
• *Leland Harrison (1883–1951)
  • Assistant Secretary of State (1922–1924)
  • Assistant Secretary of State (1924–1927)
  • Envoy Extraordinary and Minister Plenipotentiary, Sweden (1927–1929)
  • Envoy Extraordinary and Minister Plenipotentiary, Uruguay (1929–1930)
  • Envoy Extraordinary and Minister Plenipotentiary, Romania (1935–1937)
  • Envoy Extraordinary and Minister Plenipotentiary, Switzerland (1937–1947)
• Patricia DeStacy Harrison (1939–)
  • Assistant Secretary of State for Educational and Cultural Affairs (2001–2005)
• *Roger Gran Harrison (1943–)
  • Ambassador Extraordinary and Plenipotentiary, Jordan (1990–1993)
• Thomas Skelton Harrison (1837–1919)
  • Agent/Consul General, Egypt (1897–1899)
• William Henry Harrison (1773–1841)
  • Envoy Extraordinary and Minister Plenipotentiary, Colombia (1828–1829)
• *William Caldwell Harrop (1929–)
  • Ambassador Extraordinary and Plenipotentiary, Guinea (1975–1977)
  • Ambassador Extraordinary and Plenipotentiary, Kenya (1980–1983)
  • Ambassador Extraordinary and Plenipotentiary, Seychelles (1980–1983)
  • Inspector General of the Department of State and the Foreign Service (1983–1986)
  • Ambassador Extraordinary and Plenipotentiary, Congo (Kinshasa) (1987–1991)
  • Ambassador Extraordinary and Plenipotentiary, Israel (1991–1993)
• Charles Burdett Hart (1851–1930)
  • Envoy Extraordinary and Minister Plenipotentiary, Colombia (1897–1903)
• Charles Calmer Hart (1878–1956)
  • Envoy Extraordinary and Minister Plenipotentiary, Albania (1925–1928)
  • Envoy Extraordinary and Minister Plenipotentiary, Albania (1929)
  • Envoy Extraordinary and Minister Plenipotentiary, Iran (1929–1933)
• *Parker Thompson Hart (1910–1997)
  • Ambassador Extraordinary and Plenipotentiary, Jordan (1958)
  • Ambassador Extraordinary and Plenipotentiary, Kuwait (1961–1963)
  • Ambassador Extraordinary and Plenipotentiary, Saudi Arabia (1961–1965)
  • Envoy Extraordinary and Minister Plenipotentiary, Yemen (1961–1962)
  • Ambassador Extraordinary and Plenipotentiary, Turkey (1965–1968)
  • Assistant Secretary of State for Near Eastern Affairs (1968–1969)
  • Director of the Foreign Service Institute (1969)
• *Samuel Friedlander Hart (1933–)
  • Ambassador Extraordinary and Plenipotentiary, Ecuador (1982–1985)
• *Brent Robert Hartley (1955–)
  • Ambassador Extraordinary and Plenipotentiary, Slovenia (2014–2018)
• Jane Dorothy Hartley (1947–)
  • Ambassador Extraordinary and Plenipotentiary, France (2014–2017)
  • Ambassador Extraordinary and Plenipotentiary, Monaco (2014–2017)
• *Arthur Adair Hartman (1926–2015)
  • Assistant Secretary of State for European and Eurasian Affairs (1973–1977)
  • Ambassador Extraordinary and Plenipotentiary, France (1977–1981)
  • Ambassador Extraordinary and Plenipotentiary, Russia (1981–1987)
  • Career Ambassador (1984)
• Charles Sampson Hartman (1861–1929)
  • Envoy Extraordinary and Minister Plenipotentiary, Ecuador (1913–1922)
• *Douglas Alan Hartwick (1950–)
  • Ambassador Extraordinary and Plenipotentiary, Laos (2001–2004)
• *Maura Ann Harty (1959–)
  • Ambassador Extraordinary and Plenipotentiary, Paraguay (1997–1999)
  • Executive Secretary (2001–2002)
  • Assistant Secretary of State for Consular Affairs (2002–2008)
• George Brinton McClellan Harvey (1864–1928)
  • Ambassador Extraordinary and Plenipotentiary, United Kingdom (1921–1923)
• James E. Harvey (1820–)
  • Minister Resident, Portugal (1861–1869)
• *Norris S. Haselton (1902–1981)
  • Deputy Inspector General of Foreign Assistance (1961–1962)
  • Inspector General of the Department of State and the Foreign Service (1962–1964)
• Seneca Haselton (1848–1921)
  • Envoy Extraordinary and Minister Plenipotentiary, Venezuela (1894–1895)
• *Jennifer Haskell (?–)
  • Chargé d’Affaires ad interim, Congo (Kinshasa) (2018)
• *Todd P. Haskell (?–)
  • Ambassador Extraordinary and Plenipotentiary, Congo (Brazzaville) (2017)
• *Patricia Marie Haslach (1956–)
  • Ambassador Extraordinary and Plenipotentiary, Laos (2004–2007)
  • Ambassador Extraordinary and Plenipotentiary, Ethiopia (2013–2016)
• Frederick (Friedrich) Hassaurek (1831–1885)
  • Minister Resident, Ecuador (1861–1866)
• Howard E. Haugerud (1924–)
  • Deputy Inspector General of Foreign Assistance (1963)
  • Deputy Inspector General of Foreign Assistance (1964–1969)
• Crane Haussamen (1907–)
  • U.S. Permanent Representative to the United Nations Educational, Scientific and Cultural Organization (1962–1964)
• Jennifer A. Haverkamp (1957–)
  • Assistant Secretary of State for Oceans and International Environmental and Scientific Affairs (Nomination of September 8, 2014, not acted upon by the Senate.)
• *Roy T. Haverkamp (1924–)
  • Chargé d’Affaires ad interim, Grenada (1986)
• *Andrew B. Haviland (?–)
  • Chargé d’Affaires ad interim, Côte d’Ivoire (2017)
  • Chargé d’Affaires ad interim (2017–2020)
• Harry C. Hawkins (1894–1983)
  • Director of the Foreign Service Institute (1950–1952)
• *Jeffrey J. Hawkins Jr. (1966–)
  • Ambassador Extraordinary and Plenipotentiary, Central African Republic (2015–2017)
• *Patricia McMahon Hawkins (1949–)
  • Ambassador Extraordinary and Plenipotentiary, Togo (2008–2011)
• John Milton Hay (1838–1905)
  • Assistant Secretary of State (1879–1881)
  • Ambassador Extraordinary and Plenipotentiary, United Kingdom (1897–1898)
  • Secretary of State (1898–1905)
• Carlton Joseph Huntley Hayes (1882–1964)
  • Ambassador Extraordinary and Plenipotentiary, Spain (1942–1945)
• John Susskind Hayes (1910–1981)
  • Ambassador Extraordinary and Plenipotentiary, Switzerland (1966–1969)
• *Peter M. Haymond (?–)
  • Ambassador Extraordinary and Plenipotentiary, Laos (2019)
• Ulric St. Clair Haynes Jr. (1931–)
  • Ambassador Extraordinary and Plenipotentiary, Algeria (1977–1981)
• *Dennis K. Hays (1953–)
  • Chargé d’Affaires ad interim, Guyana (1992)
  • Ambassador Extraordinary and Plenipotentiary, Suriname (1997–2000)
• Lawrence Brooks Hays (1898–1981)
  • Assistant Secretary of State for Legislative Affairs (1961)
• William Henry Haywood Jr. (1801–1852)
  • Chargé d’Affaires, Belgium (1837)
• *Theresa Ann Healy (1932–2016)
  • Ambassador Extraordinary and Plenipotentiary, Sierra Leone (1980–1983)
• Augustine Heard (1827–1905)
  • Minister Resident/Consul General, Korea (1890–1893)
• William Henry Heard (1850–1937)
  • Minister Resident/Consul General, Liberia (1895–1898)
• *Dennis Walter Hearne (?–)
  • Ambassador Extraordinary and Plenipotentiary, Mozambique (2019)
• *Donald Read Heath (1894–1981)
  • Envoy Extraordinary and Minister Plenipotentiary, Bulgaria (1947–1950)
  • Envoy Extraordinary and Minister Plenipotentiary, Cambodia (1950–1952)
  • Envoy Extraordinary and Minister Plenipotentiary, Laos (1950–1954)
  • Envoy Extraordinary and Minister Plenipotentiary, State of Vietnam (1950–1952)
  • Ambassador Extraordinary and Plenipotentiary, Cambodia (1952–1954)
  • Ambassador Extraordinary and Plenipotentiary, State of Vietnam (1952–1954)
  • Ambassador Extraordinary and Plenipotentiary, Lebanon (1955–1958)
  • Ambassador Extraordinary and Plenipotentiary, Saudi Arabia (1957–1961)
  • Envoy Extraordinary and Minister Plenipotentiary, Yemen (1957)
• William Womack Heath (1903–1971)
  • Ambassador Extraordinary and Plenipotentiary, Sweden (1967–1969)
• Chic Hecht (1928–2006)
  • Ambassador Extraordinary and Plenipotentiary, The Bahamas (1989–1993)
• *Louis Douglas Heck (1918–1993)
  • Ambassador Extraordinary and Plenipotentiary, Niger (1974–1976)
  • Director of the Bureau of Counterterrorism (1976–1977)
  • Ambassador Extraordinary and Plenipotentiary, Nepal (1977–1980)
  • Chargé d’Affaires ad interim, Cyprus ()
• Margaret Mary O’Shaughnessy Heckler (1931–)
  • Ambassador Extraordinary and Plenipotentiary, Ireland (1985–1989)
• *Richard E. Hecklinger (1943–)
  • Ambassador Extraordinary and Plenipotentiary, Thailand (1998–2001)
• *Llewellyn H. Hedgbeth (1952–)
  • Chargé d’Affaires ad interim, Mongolia (1997)
• *John A. Heffern (1953–)
  • Ambassador Extraordinary and Plenipotentiary, Armenia (2011–2014)
• *Donald J. Heflin (1958–)
  • Ambassador Extraordinary and Plenipotentiary, Cape Verde (2014–2018)
• *Chris Hegadorn (?–)
  • Chargé d’Affaires ad interim (2017–2018)
• *William A. Heidt (1961–)
  • Ambassador Extraordinary and Plenipotentiary, Cambodia (2015–2018)
• *Carolee Heileman (1946–)
  • Chargé d’Affaires ad interim, Mali (1996)
• Charles A. Heimbold Jr. (1933–)
  • Ambassador Extraordinary and Plenipotentiary, Sweden (2001–2004)
• William Heimke (1847–1931)
  • Envoy Extraordinary and Minister Plenipotentiary, Guatemala (1908–1909)
  • Envoy Extraordinary and Minister Plenipotentiary, El Salvador (1909–1914)
• Samuel D. Heins (1947–)
  • Ambassador Extraordinary and Plenipotentiary, Norway (2016–2017)
• *Gerald B. Helman (1932–)
  • Representative of the U.S.A. to the European Office of the United Nations (Geneva) (1979–1981)
• Richard McGarrah Helms (1913–2002)
  • Ambassador Extraordinary and Plenipotentiary, Iran (1973–1976)
• Smith Hempstone Jr. (1929–2006)
  • Ambassador Extraordinary and Plenipotentiary, Kenya (1989–1993)
• *Douglas Henderson (1914–2010)
  • Ambassador Extraordinary and Plenipotentiary, Bolivia (1963–1968)
• *Loy Wesley Henderson (1892–1986)
  • Envoy Extraordinary and Minister Plenipotentiary, Iraq (1943–1945)
  • Ambassador Extraordinary and Plenipotentiary, India (1948–1951)
  • Envoy Extraordinary and Minister Plenipotentiary, Nepal (1948–1951)
  • Ambassador Extraordinary and Plenipotentiary, Iran (1951–1954)
  • Deputy Under Secretary of State for Management (1955)
  • Deputy Under Secretary of State for Management (1955–1961)
  • Assistant Secretary of State for Administration (1955)
  • Career Ambassador (1956)
• Robert Clymer Hendrickson (1898–1964)
  • Ambassador Extraordinary and Plenipotentiary, New Zealand (1955–1956)
• *Robert Thomas Hennemeyer (1925–)
  • Ambassador Extraordinary and Plenipotentiary, The Gambia (1984–1986)
• *John Hennessey-Niland (?–)
  • Ambassador Extraordinary and Plenipotentiary, Palau (2020)
• John Francis Henning (1915–2009)
  • Ambassador Extraordinary and Plenipotentiary, New Zealand (1967–1969)
• John J. Henry (?–)
  • Commissioner and Consul General, Liberia (1863)
• *Simon Henshaw (?–)
  • Ambassador Extraordinary and Plenipotentiary, Guinea (2019–2020)
• *Christopher Henzel (1962–)
  • Chargé d’Affaires ad interim, Saudi Arabia (2019)
  • Ambassador Extraordinary and Plenipotentiary, Yemen (2019)
• Patricia Louise Herbold (1940–)
  • Ambassador Extraordinary and Plenipotentiary, Singapore (2005–2009)
• *John Edward Herbst (1952–)
  • Ambassador Extraordinary and Plenipotentiary, Uzbekistan (2000–2003)
  • Ambassador Extraordinary and Plenipotentiary, Ukraine (2003–2006)
• David B. Hermelin (1936–2000)
  • Ambassador Extraordinary and Plenipotentiary, Norway (1997–2000)
• Benigno Carlos Hernandez (1917–2007)
  • Ambassador Extraordinary and Plenipotentiary, Paraguay (1967–1969)
• Myron Timothy Herrick (1854–1929)
  • Ambassador Extraordinary and Plenipotentiary, France (1912–1914)
  • Ambassador Extraordinary and Plenipotentiary, France (1921–1929)
• Hans H. Hertell (1950–)
  • Ambassador Extraordinary and Plenipotentiary, Dominican Republic (2001–2007)
• Christian Archibald Herter (1895–1966)
  • Under Secretary of State (1957–1959)
  • Secretary of State (1959–1961)
  • U.S. Trade Representative (1962–1966)
• *Martin Florian Herz (1917–1983)
  • Ambassador Extraordinary and Plenipotentiary, Bulgaria (1974–1977)
• Scott Heuer Jr. (1925–1982)
  • Inspector General of Foreign Assistance (1969–1971)
• William Alexander Hewitt (1914–1998)
  • Ambassador Extraordinary and Plenipotentiary, Jamaica (1982–1985)
• Bruce Alan Heyman (1958–)
  • Ambassador Extraordinary and Plenipotentiary, Canada (2014–2017)
• *John Dewey Hickerson (1898–1989)
  • Assistant Secretary of State for International Organization Affairs (1949–1953)
  • Ambassador Extraordinary and Plenipotentiary, Finland (1955–1959)
  • Ambassador Extraordinary and Plenipotentiary, Philippines (1959–1961)
• *Irvin Hicks (1938–)
  • Ambassador Extraordinary and Plenipotentiary, Seychelles (1985–1987)
  • Ambassador Extraordinary and Plenipotentiary, Ethiopia (1994–1996)
• John Hicks (1847–1917)
  • Envoy Extraordinary and Minister Plenipotentiary, Peru (1889–1893)
  • Envoy Extraordinary and Minister Plenipotentiary, Chile (1905–1909)
• *John F. Hicks (1949–)
  • Ambassador Extraordinary and Plenipotentiary, Eritrea (1996–1997)
• Heather Anne Higginbottom (1972–)
  • Deputy Secretary of State for Management and Resources (2013–2017)
• Bradford R. Higgins (1952–)
  • Assistant Secretary of State for Resource Management (2006–2009)
• Horace Augustus Hildreth (1902–1988)
  • Ambassador Extraordinary and Plenipotentiary, Pakistan (1953–1957)
• *Christopher Robert Hill (1952–)
  • Chargé d’Affaires ad interim, Albania (1991)
  • Ambassador Extraordinary and Plenipotentiary, Macedonia (1996–1999)
  • Ambassador Extraordinary and Plenipotentiary, Poland (2000–2004)
  • Ambassador Extraordinary and Plenipotentiary, Korea (2004–2005)
  • Assistant Secretary of State for East Asian and Pacific Affairs (2005–2009)
  • Ambassador Extraordinary and Plenipotentiary, Iraq (2009–2010)
• David Jayne Hill (1850–1932)
  • Assistant Secretary of State (1898–1903)
  • Envoy Extraordinary and Minister Plenipotentiary, Switzerland (1903–1905)
  • Envoy Extraordinary and Minister Plenipotentiary, Netherlands (1905–1908)
  • Envoy Extraordinary and Minister Plenipotentiary, Luxembourg (1905–1908)
  • Ambassador Extraordinary and Plenipotentiary, Germany (1908–1911)
• *G. Kathleen Hill (1964–)
  • Ambassador Extraordinary and Plenipotentiary, Malta (2015–2018)
• *Hugh Kenneth Hill (1937–)
  • Ambassador Extraordinary and Plenipotentiary, Bulgaria (1990–1993)
• *John Calvin Hill Jr. (1921–1973)
  • Chargé d’Affaires ad interim, Dominican Republic ()
• *M. Charles Hill (1936–)
  • Executive Secretary (1983–1985)
• *Nicholas Manning Hill (1959–)
  • Chargé d’Affaires ad interim, Bosnia and Herzegovina (2015)
• Robert Charles Hill (1917–1978)
  • Ambassador Extraordinary and Plenipotentiary, Costa Rica (1953–1954)
  • Ambassador Extraordinary and Plenipotentiary, El Salvador (1954–1955)
  • Assistant Secretary of State for Legislative Affairs (1956–1957)
  • Ambassador Extraordinary and Plenipotentiary, Mexico (1957–1960)
  • Ambassador Extraordinary and Plenipotentiary, Spain (1969–1972)
  • Ambassador Extraordinary and Plenipotentiary, Argentina (1973–1977)
• John Henry Hilldring (1895–1974)
  • Assistant Secretary of State for Occupied Areas (1946–1947)
• John Hillen (1966–)
  • Assistant Secretary of State for Politico-Military Affairs (2005–2008)
• *Martin Joseph Anthony Hillenbrand (1915–2005)
  • Ambassador Extraordinary and Plenipotentiary, Hungary (1967–1969)
  • Assistant Secretary of State for European and Eurasian Affairs (1969–1972)
  • Ambassador Extraordinary and Plenipotentiary, Germany (1972–1976)
• Henry Washington Hilliard (1808–1892)
  • Chargé d’Affaires, Belgium (1842–1844)
  • Envoy Extraordinary and Minister Plenipotentiary, Brazil (1877–1881)
• Carla Anderson Hills (1934–)
  • U.S. Trade Representative (1989–1993)
• Roger Hilsman Jr. (1919–2014)
  • Assistant Secretary of State for Intelligence and Research (1961–1963)
  • Assistant Secretary of State for East Asian and Pacific Affairs (1963–1964)
• Frank Thomas Hines (1879–1960)
  • Ambassador Extraordinary and Plenipotentiary, Panama (1945–1948)
  • Ambassador Extraordinary and Plenipotentiary, Panama (1945)
• *Deane Roesch Hinton (1923–2017)
  • Ambassador Extraordinary and Plenipotentiary, Congo (Kinshasa) (1974–1975)
  • Representative of the U.S.A. to the European Union, with the rank and status of Ambassador Extraordinary and Plenipotentiary (1976–1979)
  • Assistant Secretary of State for Economic, Energy, and Business Affairs (1979–1981)
  • Ambassador Extraordinary and Plenipotentiary, El Salvador (1981–1983)
  • Ambassador Extraordinary and Plenipotentiary, Pakistan (1983–1986)
  • Ambassador Extraordinary and Plenipotentiary, Costa Rica (1987–1990)
  • Career Ambassador (1987)
  • Ambassador Extraordinary and Plenipotentiary, Panama (1990–1994)
• *John Lewis Hirsch (1936–)
  • Ambassador Extraordinary and Plenipotentiary, Sierra Leone (1995–1998)
• Solomon Hirsch (1839–1902)
  • Envoy Extraordinary and Minister Plenipotentiary, Turkey (1889–1892)
• Elijah Hise (1802–1867)
  • Chargé d’Affaires, Guatemala (1848–1849)
• Ethan Allen Hitchcock (1835–1909)
  • Envoy Extraordinary and Minister Plenipotentiary, Russia (1897–1898)
  • Ambassador Extraordinary and Plenipotentiary, Russia (1898–1899)
• Robert Roberts Hitt (1834–1906)
  • Assistant Secretary of State (1881)
• Robert Stockwell Reynolds Hitt (1876–1938)
  • Envoy Extraordinary and Minister Plenipotentiary, Panama (1909–1910)
  • Envoy Extraordinary and Minister Plenipotentiary, Guatemala (1910–1913)
  • Envoy Extraordinary and Minister Plenipotentiary, Venezuela (1910)
• *Richard Eugene Hoagland (1950–)
  • Ambassador Extraordinary and Plenipotentiary, Tajikistan (2003–2006)
  • Ambassador Extraordinary and Plenipotentiary, Kazakhstan (2008–2011)
  • Chargé d’Affaires ad interim, Turkmenistan (2008)
  • Ambassador Extraordinary and Plenipotentiary, Armenia (Nomination of May 23, 2006, not acted upon by the Senate. Renominated January 9, 2007. Nomination withdrawn August 3, 2007.)
• *David L. Hobbs (1940–)
  • Ambassador Extraordinary and Plenipotentiary, Guyana (1995–1996)
• Amos J. Hochstein (?–)
  • Assistant Secretary of State for Energy Resources (Nomination of October 8, 2015, not acted upon by the Senate.)
• *Heather M. Hodges (1946–)
  • Ambassador Extraordinary and Plenipotentiary, Moldova (2003–2006)
  • Ambassador Extraordinary and Plenipotentiary, Ecuador (2008–2011)
• James Day Hodgson (1915–2012)
  • Ambassador Extraordinary and Plenipotentiary, Japan (1974–1977)
• Peter Hoekstra (?–)
  • Ambassador Extraordinary and Plenipotentiary, Netherlands (2017)
• *Roscoe Lewis Hoffacker (1923–2013)
  • Ambassador Extraordinary and Plenipotentiary, Equatorial Guinea (1969–1972)
  • Ambassador Extraordinary and Plenipotentiary, Cameroon (1969–1972)
  • Chargé d’Affaires ad interim, Algeria (1969)
• Alfred Hoffman (1934–)
  • Ambassador Extraordinary and Plenipotentiary, Portugal (2005–2007)
• Paul Gray Hoffman (1891–1974)
  • Administrator of the Economic Cooperation Administration (1948–1950)
• Wickham Hoffman (1821–1900)
  • Minister Resident/Consul General, Denmark (1883–1885)
• *Karl William Hofmann (1961–)
  • Chargé d’Affaires ad interim, Lesotho (1995)
  • Ambassador Extraordinary and Plenipotentiary, Togo (2000–2002)
  • Executive Secretary (2002–2005)
• *Dereck J. Hogan (?–)
  • Ambassador Extraordinary and Plenipotentiary, Moldova (2018)
• Richard Charles Albert Holbrooke (1941–2010)
  • Assistant Secretary of State for East Asian and Pacific Affairs (1977–1981)
  • Ambassador Extraordinary and Plenipotentiary, Germany (1993–1994)
  • Assistant Secretary of State for European and Eurasian Affairs (1994–1996)
  • Representative of the U.S.A. to the United Nations (1999–2001)
• Thomas Holcomb Jr. (1879–1965)
  • Envoy Extraordinary and Minister Plenipotentiary, South Africa (1944–1948)
• Glen A. Holden (1927–)
  • Ambassador Extraordinary and Plenipotentiary, Jamaica (1989–1993)
• William Woods Holden (1818–1892)
  • Minister Resident, El Salvador (Not commissioned, nomination rejected by the Senate.)
• *John Herbert Holdridge (1924–2001)
  • Ambassador Extraordinary and Plenipotentiary, Singapore (1975–1978)
  • Assistant Secretary of State for East Asian and Pacific Affairs (1981–1982)
  • Ambassador Extraordinary and Plenipotentiary, Indonesia (1982–1986)
• Laura S. H. Holgate (1965–)
  • Representative of the U.S.A. to the Vienna Office of the United Nations (Vienna) (2016–2017)
  • Representative of the U.S.A. to the International Atomic Energy Agency (Vienna) (2016–2017)
• Henry Finch Holland (1912–1962)
  • Assistant Secretary of State for Western Hemisphere Affairs (1954–1956)
• Jerome Heartwell Holland (1916–1985)
  • Ambassador Extraordinary and Plenipotentiary, Sweden (1970–1972)
• *Hugh Byron Hollingsworth (1933–)
  • Inspector General of the Department of State and the Foreign Service (Designated Program Inspector General, Oct 9, 1985. P.L. 99-399 of Aug 27, 1986 (100 Stat. 867), abolished the position and created the office of Inspector General of the Department of State. H. Byron Hollingsworth of Virginia (Foreign Service officer) served as Acting Inspector General, Aug 1986-Aug 1987.)
• Gideon Hiram Hollister (1817–1881)
  • Minister Resident/Consul General, Haiti (1868–1869)
• John Baker Hollister (1890–1979)
  • Director of the International Cooperation Administration (1955–1957)
• Anne Forrester Holloway (1941–2006)
  • Ambassador Extraordinary and Plenipotentiary, Mali (1979–1981)
• *Perry L. Holloway (1960–)
  • Ambassador Extraordinary and Plenipotentiary, Guyana (2015–2018)
• Bradley Paul Holmes (1953–)
  • Coordinator for International Communications and Information Policy (1989–1993)
• *Edward Warren Holmes (1923–2010)
  • Chargé d’Affaires ad interim, Malawi ()
• *Genta Hawkins Holmes (1940–)
  • Ambassador Extraordinary and Plenipotentiary, Namibia (1990–1992)
  • Director General of the Foreign Service (1992–1995)
  • Ambassador Extraordinary and Plenipotentiary, Australia (1997–2000)
• *Henry Allen Holmes Jr. (1933–)
  • Ambassador Extraordinary and Plenipotentiary, Portugal (1982–1985)
  • Assistant Secretary of State for Politico-Military Affairs (1985–1989)
  • Ambassador at Large (1989–1993)
• *J. Anthony Holmes (1950–)
  • Ambassador Extraordinary and Plenipotentiary, Burkina Faso (2002–2005)
• *James Howard Holmes (1943–)
  • Ambassador Extraordinary and Plenipotentiary, Latvia (1998–2001)
• *Julius Cecil Holmes (1899–1968)
  • Assistant Secretary of State for Administration (1944–1945)
  • Diplomatic Agent/Consul General, Morocco (1955–1956)
  • Ambassador Extraordinary and Plenipotentiary, Iran (1961–1965)
  • Ambassador Extraordinary and Plenipotentiary, Iran (Not commissioned; nomination withdrawn before the Senate acted upon it.)
• Kim R. Holmes (1952–)
  • Assistant Secretary of State for International Organization Affairs (2002–2005)
• Henrietta Holsman Fore (1948–)
  • Under Secretary of State for Management (2005–2007)
• Henry Frank Holthusen (1894–1971)
  • Envoy Extraordinary and Minister Plenipotentiary, Czechoslovakia (Not commissioned; nomination not confirmed by the Senate.)
• Abner Linwood Holton (1923–)
  • Assistant Secretary of State for Legislative Affairs (1974–1975)
• *Greta Christine Holtz (1959–)
  • Ambassador Extraordinary and Plenipotentiary, Oman (2012–2015)
• John David Holum (1940–)
  • Director of the U.S. Arms Control and Disarmament Agency (1993–1999)
  • Under Secretary of State for Arms Control and International Security Affairs (2000–2001)
• Richard Newton Holwill (1945–)
  • Ambassador Extraordinary and Plenipotentiary, Ecuador (1988–1989)
• *John C. Holzman (1944–)
  • Ambassador Extraordinary and Plenipotentiary, Bangladesh (1997–2000)
• Solomon Porter Hood (1853–1943)
  • Minister Resident/Consul General, Liberia (1921–1926)
• Brian H. Hook (1968–)
  • Assistant Secretary of State for International Organization Affairs (2008–2009)
  • Director of Policy Planning (2017–2018)
• *Aubrey Hooks (1948–)
  • Ambassador Extraordinary and Plenipotentiary, Congo (Brazzaville) (1996–1999)
  • Ambassador Extraordinary and Plenipotentiary, Congo (Kinshasa) (2001–2004)
  • Ambassador Extraordinary and Plenipotentiary, Côte d’Ivoire (2004–2007)
• Herbert Clark Hoover Jr. (1903–1969)
  • Under Secretary of State (1954–1957)
• *John F. Hoover (1960–)
  • Ambassador Extraordinary and Plenipotentiary, Sierra Leone (2014–2017)
• George Washington Hopkins (1804–1861)
  • Chargé d’Affaires, Portugal (1847–1849)
• Moses Aaron Hopkins (1846–1886)
  • Minister Resident/Consul General, Liberia (1885–1886)
• *Harold Eugene Horan (1927–2008)
  • Ambassador Extraordinary and Plenipotentiary, Malawi (1978–1980)
• *Hume Alexander Horan (1934–2004)
  • Ambassador Extraordinary and Plenipotentiary, Equatorial Guinea (1980–1981)
  • Ambassador Extraordinary and Plenipotentiary, Cameroon (1980–1983)
  • Ambassador Extraordinary and Plenipotentiary, Sudan (1983–1986)
  • Ambassador Extraordinary and Plenipotentiary, Saudi Arabia (1987–1988)
  • Ambassador Extraordinary and Plenipotentiary, Côte d’Ivoire (1992–1995)
• Robert David Hormats (1943–)
  • Assistant Secretary of State for Economic, Energy, and Business Affairs (1981–1982)
  • Under Secretary for Economic Growth, Energy, and the Environment (2009–2013)
• James Catherwood Hormel (1933–)
  • Ambassador Extraordinary and Plenipotentiary, Luxembourg (1999–2001)
• Stanley Kuhl Hornbeck (1883–1966)
  • Ambassador Extraordinary and Plenipotentiary, Netherlands (1944–1947)
• *John Evarts Horner (1916–1997)
  • Chargé d’Affaires ad interim, Bulgaria ()
• William Harrison Hornibrook (1884–1946)
  • Envoy Extraordinary and Minister Plenipotentiary, Thailand (1915–1916)
  • Envoy Extraordinary and Minister Plenipotentiary, Iran (1933–1936)
  • Envoy Extraordinary and Minister Plenipotentiary, Afghanistan (1935–1936)
  • Envoy Extraordinary and Minister Plenipotentiary, Costa Rica (1937–1941)
• *Herbert E. Horowitz (1930–)
  • Ambassador Extraordinary and Plenipotentiary, The Gambia (1986–1989)
• *Outerbridge Horsey II (1910–1983)
  • Ambassador Extraordinary and Plenipotentiary, Czechoslovakia (1962–1966)
• *Elizabeth K. Horst (?–)
  • Chargé d’Affaires ad interim, Estonia (2019)
• Harold Boies Hoskins (1895–)
  • Director of the Foreign Service Institute (1955–1961)
• Charles Warren Hostler (1920–2014)
  • Ambassador Extraordinary and Plenipotentiary, Bahrain (1989–1993)
• *Robert Gordon Houdek (1940–)
  • Ambassador Extraordinary and Plenipotentiary, Uganda (1985–1988)
  • Chargé d’Affaires ad interim, Ethiopia (1991)
  • Ambassador Extraordinary and Plenipotentiary, Eritrea (1993–1996)
• Alanson Bigelow Houghton (1863–1941)
  • Ambassador Extraordinary and Plenipotentiary, Germany (1922–1925)
  • Ambassador Extraordinary and Plenipotentiary, United Kingdom (1925–1929)
• Amory Houghton (1899–1981)
  • Ambassador Extraordinary and Plenipotentiary, France (1957–1961)
• Alvin Peterson Hovey (1821–1891)
  • Envoy Extraordinary and Minister Plenipotentiary, Peru (1865–1870)
• Findley Burtch Howard (1885–)
  • Envoy Extraordinary and Minister Plenipotentiary, Paraguay (1935–1941)
• Henry Clay Howard (1860–1928)
  • Envoy Extraordinary and Minister Plenipotentiary, Peru (1911–1913)
• Jacob Merritt Howard (1805–1871)
  • Minister Resident, Honduras (1861)
• Tilghman Ashurst Howard (1797–1844)
  • Chargé d’Affaires, Texas (1844)
• William Alanson Howard (1813–1880)
  • Envoy Extraordinary and Minister Plenipotentiary, China (Commissioned to China. Took oath of office, but did not proceed to post.)
• Jonathan Trumbull Howe (1935–)
  • Assistant Secretary of State for Politico-Military Affairs (1982–1984)
• Walter Howe (1907–1966)
  • Ambassador Extraordinary and Plenipotentiary, Chile (1958–1961)
• Joseph Morton Howell (1863–1937)
  • Agent/Consul General, Egypt (1921–1922)
  • Envoy Extraordinary and Minister Plenipotentiary, Egypt (1922–1927)
• *W. Nathaniel Howell (1939–)
  • Ambassador Extraordinary and Plenipotentiary, Kuwait (1987–1990)
• *Williamson Smith Howell Jr. (1890–1947)
  • Ambassador Extraordinary and Plenipotentiary, Uruguay (1947)
• Kenneth A. Howery (?–)
  • Ambassador Extraordinary and Plenipotentiary, Sweden (2019)
• *Richard C. Howland (1934–)
  • Ambassador Extraordinary and Plenipotentiary, Suriname (1987–1990)
• *Henry Augustus Hoyt (1914–1967)
  • Ambassador Extraordinary and Plenipotentiary, Uruguay (1965–1967)
• *Michael Stephen Hoza (1957–)
  • Ambassador Extraordinary and Plenipotentiary, Cameroon (2014–2017)
• *Donna Jean Hrinak (1951–)
  • Ambassador Extraordinary and Plenipotentiary, Dominican Republic (1994–1997)
  • Ambassador Extraordinary and Plenipotentiary, Bolivia (1997–2000)
  • Ambassador Extraordinary and Plenipotentiary, Venezuela (2000–2002)
  • Ambassador Extraordinary and Plenipotentiary, Brazil (2002–2004)
• John Randolph Hubbard (1918–2011)
  • Ambassador Extraordinary and Plenipotentiary, India (1988–1989)
• Richard Bennet Hubbard (1832–1901)
  • Envoy Extraordinary and Minister Plenipotentiary, Japan (1885–1889)
• *Thomas C. Hubbard (1943–)
  • Ambassador Extraordinary and Plenipotentiary, Philippines (1996–2000)
  • Ambassador Extraordinary and Plenipotentiary, Palau (1996–2000)
  • Ambassador Extraordinary and Plenipotentiary, Korea (2001–2004)
• James Randolph Hubbell (1824–1896)
  • Minister Resident, Ecuador (Not commissioned; nomination rejected by the Senate.)
• *Franklin Pierce Huddle Jr. (1943–)
  • Chargé d’Affaires ad interim, Burma (1994)
  • Ambassador Extraordinary and Plenipotentiary, Tajikistan (2001–2003)
• *Jerome Klahr Huddle (1891–1959)
  • Ambassador Extraordinary and Plenipotentiary, Burma (1947–1949)
• *Vicki J. Huddleston (1942–)
  • Ambassador Extraordinary and Plenipotentiary, Madagascar (1995–1997)
  • Principal Officer, Cuba (2002)
  • Ambassador Extraordinary and Plenipotentiary, Mali (2002–2005)
• Silas A. Hudson (1815–1896)
  • Minister Resident, Guatemala (1869–1872)
• *William J. Hudson (1946–)
  • Ambassador Extraordinary and Plenipotentiary, Tunisia (2003–2006)
• David Huebner (1960–)
  • Ambassador Extraordinary and Plenipotentiary, Samoa (2009–2014)
  • Ambassador Extraordinary and Plenipotentiary, New Zealand (2009–2014)
• Roy M. Huffington (1917–2008)
  • Ambassador Extraordinary and Plenipotentiary, Austria (1990–1993)
• *Joseph Huggins (1951–)
  • Ambassador Extraordinary and Plenipotentiary, Botswana (2002–2005)
• *Arthur Hayden Hughes (1939–)
  • Ambassador Extraordinary and Plenipotentiary, Yemen (1991–1994)
• Charles Evans Hughes (1862–1948)
  • Secretary of State (1921–1925)
• Christopher Hughes Jr. (1786–1849)
  • Chargé d’Affaires, Sweden (1819–1825)
  • Chargé d’Affaires, Netherlands (1825–1830)
  • Chargé d’Affaires, Sweden (1830–1841)
  • Chargé d’Affaires, Netherlands (1842–1845)
  • Envoy Extraordinary and Minister Plenipotentiary, Netherlands (Nomination of December 11, 1828, tabled by the Senate.)
• G. Philip Hughes (1953–)
  • Ambassador Extraordinary and Plenipotentiary, Dominica (1990–1993)
  • Ambassador Extraordinary and Plenipotentiary, Barbados (1990–1993)
  • Ambassador Extraordinary and Plenipotentiary, Saint Vincent and the Grenadines (1990–1993)
  • Ambassador Extraordinary and Plenipotentiary, Saint Lucia (1990–1993)
• John Chambers Hughes (1891–1971)
  • U.S. Permanent Representative on the Council of the North Atlantic Treaty Organization (1953–1955)
• Karen P. Hughes (1956–)
  • Under Secretary of State for Public Diplomacy and Public Affairs (2005–2007)
• *Lisa Bobbie Schreiber Hughes (1958–)
  • Ambassador Extraordinary and Plenipotentiary, Suriname (2006–2009)
• *Miriam K. Hughes (1945–)
  • Ambassador Extraordinary and Plenipotentiary, Micronesia, Federated States of (2007–2009)
• *Morris Nelson Hughes (1901–)
  • Chargé d’Affaires, Tunisia (1956)
• *Morris Nelson Hughes Jr. (1945–2016)
  • Ambassador Extraordinary and Plenipotentiary, Burundi (1996–1999)
• (Robert) John Hughes (1930–)
  • Assistant Secretary of State for Public Affairs (1982–1985)
• Thomas Lowe Hughes (1925–)
  • Assistant Secretary of State for Intelligence and Research (1963–1969)
• William J. Hughes (1932–)
  • Ambassador Extraordinary and Plenipotentiary, Panama (1995–1998)
• *Marie T. Huhtala (1949–)
  • Ambassador Extraordinary and Plenipotentiary, Malaysia (2001–2004)
• *Joseph S. Hulings III (1941–)
  • Ambassador Extraordinary and Plenipotentiary, Turkmenistan (1992–1995)
• Cordell Hull (1871–1955)
  • Secretary of State (1933–1944)
• *Edmund James Hull (1949–)
  • Ambassador Extraordinary and Plenipotentiary, Yemen (2001–2004)
• *Thomas Neil Hull (1945–)
  • Ambassador Extraordinary and Plenipotentiary, Sierra Leone (2004–2007)
• *Benjamin Mayham Hulley (1898–)
  • Chargé d’Affaires ad interim, Finland ()
• *Cameron R. Hume (1947–)
  • Ambassador Extraordinary and Plenipotentiary, Algeria (1997–2000)
  • Ambassador Extraordinary and Plenipotentiary, South Africa (2001–2004)
  • Ambassador Extraordinary and Plenipotentiary, Indonesia (2007–2010)
  • Chargé d’Affaires, Sudan (2007)
• Carlisle Hubbard Humelsine (1915–1989)
  • Deputy Under Secretary of State for Management (1950–1953)
  • Assistant Secretary of State for Administration (1950–1953)
• John Portner Humes (1921–1985)
  • Ambassador Extraordinary and Plenipotentiary, Austria (1969–1975)
• *Arthur William Hummel Jr. (1920–2001)
  • Ambassador Extraordinary and Plenipotentiary, Burma (1968–1971)
  • Ambassador Extraordinary and Plenipotentiary, Ethiopia (1975–1976)
  • Assistant Secretary of State for East Asian and Pacific Affairs (1976–1977)
  • Ambassador Extraordinary and Plenipotentiary, Pakistan (1977–1981)
  • Ambassador Extraordinary and Plenipotentiary, China (1981–1985)
  • Career Ambassador (1981)
• David Humphreys (1752–1818)
  • Minister Resident, Portugal (1791–1797)
  • Minister Plenipotentiary, Spain (1796–1801)
• *J. Baxter Hunt III (?–)
  • Chargé d’Affaires ad interim, Chile (2019–2020)
• George Wylie Paul Hunt (1859–1934)
  • Envoy Extraordinary and Minister Plenipotentiary, Thailand (1920–1921)
• Swanee Grace Hunt (1950–)
  • Ambassador Extraordinary and Plenipotentiary, Austria (1993–1997)
• William Henry Hunt (1823–1884)
  • Envoy Extraordinary and Minister Plenipotentiary, Russia (1882–1884)
• *Charles F. Hunter (1961–)
  • Chargé d’Affaires ad interim, Syria (2011)
• Robert E. Hunter (1940–)
  • U.S. Permanent Representative on the Council of the North Atlantic Treaty Organization (1993–1997)
• Whiteside Godfrey Hunter (1841–1917)
  • Envoy Extraordinary and Minister Plenipotentiary, Honduras (1897–1903)
  • Envoy Extraordinary and Minister Plenipotentiary, Guatemala (1897–1903)
• William Hunter (1805–1886)
  • Chief Clerk (1852–1855)
  • Secretary of State ad interim (1853)
  • Assistant Secretary of State (1855)
  • Secretary of State ad interim (1860)
  • Second Assistant Secretary of State (1866–1886)
• William Hunter Jr. (1774–1849)
  • Chargé d’Affaires, Brazil (1834–1842)
  • Envoy Extraordinary and Minister Plenipotentiary, Brazil (1841–1843)
• Jon M. Huntsman Jr. (1960–)
  • Ambassador Extraordinary and Plenipotentiary, Singapore (1992–1993)
  • Ambassador Extraordinary and Plenipotentiary, China (2009–2011)
  • Ambassador Extraordinary and Plenipotentiary, Russia (2017–2019)
• John Gavin Hurd (1914–2001)
  • Ambassador Extraordinary and Plenipotentiary, South Africa (1970–1975)
  • Ambassador Extraordinary and Plenipotentiary, Venezuela (Not commissioned; nomination withdrawn before the Senate acted upon it.)
• Stephen Augustus Hurlbut (1815–1882)
  • Minister Resident, Colombia (1869–1872)
  • Envoy Extraordinary and Minister Plenipotentiary, Peru (1881)
• Patrick Jay Hurley (1883–1963)
  • Envoy Extraordinary and Minister Plenipotentiary, New Zealand (1942)
  • Ambassador Extraordinary and Plenipotentiary, China (1944–1945)
• *Robert A. Hurwitch (1920–1997)
  • Ambassador Extraordinary and Plenipotentiary, Dominican Republic (1973–1978)
• *Edward Hurwitz (1931–)
  • Chargé d’Affaires ad interim, Afghanistan (1986)
  • Ambassador Extraordinary and Plenipotentiary, Kyrgyzstan (1992–1994)
• *Thomas J. Hushek (?–)
  • Ambassador Extraordinary and Plenipotentiary, South Sudan (2018–2020)
• *Ravic R. Huso (1953–)
  • Ambassador Extraordinary and Plenipotentiary, Laos (2007–2010)
• *William Bertrand Hussey (1915–2013)
  • Chargé d’Affaires ad interim, Mauritius ()
• John H. Hutchenson (?–)
  • Minister Resident, Hawaii (Not commissioned; nomination not confirmed by the Senate.)
• Kay Bailey Hutchison (?–)
  • U.S. Permanent Representative on the Council of the North Atlantic Treaty Organization (2017)
• *Amy Jane Hyatt (1955–)
  • Ambassador Extraordinary and Plenipotentiary, Palau (2015–2020)
• Jeanette W. Hyde (1938–)
  • Ambassador Extraordinary and Plenipotentiary, Dominica (1994–1998)
  • Ambassador Extraordinary and Plenipotentiary, Barbados (1994–1998)
  • Ambassador Extraordinary and Plenipotentiary, Saint Vincent and the Grenadines (1994–1998)
  • Ambassador Extraordinary and Plenipotentiary, Saint Lucia (1994–1998)
  • Ambassador Extraordinary and Plenipotentiary, Antigua and Barbuda (1995–1998)
  • Ambassador Extraordinary and Plenipotentiary, Grenada (1995–1998)
  • Ambassador Extraordinary and Plenipotentiary, Saint Kitts and Nevis (1995–1998)
• William G. Hyland (1929–2008)
  • Assistant Secretary of State for Intelligence and Research (1974–1975)