Principal Officers and Chiefs of Mission, by Name: K

Note: Career Foreign Service appointees are asterisked.

• David H. Kaeuper (1943–)
  • Ambassador Extraordinary and Plenipotentiary, Congo (Brazzaville) (1999–2002)
  • Chargé d’Affaires, Sudan (2005)
• Charles Lemuel Kagey (1876–1941)
  • Envoy Extraordinary and Minister Plenipotentiary, Finland (1921–1925)
• *Tina S. Kaidanow (1965–)
  • Chargé d’Affaires ad interim, Kosovo (2008)
  • Ambassador Extraordinary and Plenipotentiary, Kosovo (2008–2009)
  • Director of the Bureau of Counterterrorism (2014–2016)
  • Assistant Secretary of State for Politico-Military Affairs ()
• Philip Mayer Kaiser (1913–2007)
  • Ambassador Extraordinary and Plenipotentiary, Senegal (1961–1964)
  • Ambassador Extraordinary and Plenipotentiary, Mauritania (1961–1964)
  • Ambassador Extraordinary and Plenipotentiary, Hungary (1977–1980)
  • Ambassador Extraordinary and Plenipotentiary, Austria (1980–1981)
• Bernard Kalb (1922–)
  • Assistant Secretary of State for Public Affairs (1985–1986)
• Thorsten Valentine Kalijarvi (1897–1980)
  • Ambassador Extraordinary and Plenipotentiary, El Salvador (1957–1960)
  • Assistant Secretary of State for Economic, Energy, and Business Affairs (1957)
• *Harry R. Kamian (?–)
  • Chargé d’Affaires ad interim (2017–2019)
• *Curtis W. Kamman (1939–)
  • Principal Officer, Cuba (1987)
  • Ambassador Extraordinary and Plenipotentiary, Chile (1991–1994)
  • Ambassador Extraordinary and Plenipotentiary, Bolivia (1994–1997)
  • Ambassador Extraordinary and Plenipotentiary, Colombia (1997–2000)
• Max M. Kampelman (1920–2013)
  • Ambassador Extraordinary and Plenipotentiary to the U.S. Office for Arms Reduction Negotiations (Geneva) (1985)
  • Counselor (1987–1989)
• Robert Francis Kane (1926–2007)
  • Ambassador Extraordinary and Plenipotentiary, Ireland (1984–1985)
• Walter Kansteiner (1955–)
  • Assistant Secretary of State for African Affairs (2001–2003)
• Arnold Lee Kanter (1945–)
  • Under Secretary of State for Political Affairs (1991–1993)
• Mickey (Michael) Kantor (1939–)
  • U.S. Trade Representative (1993)
• Samuel Louis Kaplan (1936–)
  • Ambassador Extraordinary and Plenipotentiary, Morocco (2009–2013)
• *Arma Jane Karaer (1941–)
  • Ambassador Extraordinary and Plenipotentiary, Solomon Islands (1997–2000)
  • Ambassador Extraordinary and Plenipotentiary, Papua New Guinea (1997–2000)
  • Ambassador Extraordinary and Plenipotentiary, Vanuatu (1997–2000)
• David Brewer Karrick (1893–1960)
  • Ambassador Extraordinary and Plenipotentiary, Ecuador (1960)
• John Adam Kasson (1822–1910)
  • Envoy Extraordinary and Minister Plenipotentiary, Austria (1877–1881)
  • Envoy Extraordinary and Minister Plenipotentiary, Germany (1884–1885)
• *Theodore H. Kattouf (1946–)
  • Chargé d’Affaires ad interim, Yemen (1988)
  • Ambassador Extraordinary and Plenipotentiary, United Arab Emirates (1998–2001)
  • Ambassador Extraordinary and Plenipotentiary, Syria (2001–2003)
• *Abraham Katz (1926–2013)
  • Representative of the U.S.A. to the Organization for Economic Cooperation and Development (Paris) (1981–1984)
• Allan J. Katz (1947–)
  • Ambassador Extraordinary and Plenipotentiary, Portugal (2010–2013)
• Julius Louis Katz (1925–2000)
  • Assistant Secretary of State for Economic, Energy, and Business Affairs (1976–1979)
• *Jay Kenneth Katzen (1936–)
  • Chargé d’Affaires ad interim, Congo (Brazzaville) ()
• Nicholas deBelleville Katzenbach (1922–2012)
  • Under Secretary of State (1966–1969)
• David E. Kaufman (1883–1962)
  • Envoy Extraordinary and Minister Plenipotentiary, Bolivia (1928–1929)
  • Envoy Extraordinary and Minister Plenipotentiary, Thailand (1930–1933)
• *Richard Dale Kauzlarich (1944–)
  • Ambassador Extraordinary and Plenipotentiary, Azerbaijan (1994–1997)
  • Ambassador Extraordinary and Plenipotentiary, Bosnia and Herzegovina (1997–1999)
• Katherine A. Kavalec (?–)
  • Ambassador Extraordinary and Plenipotentiary, Albania (Nominated July 3, 2018; nominaion returned by the Senate on January 3, 2019.)
• Edward Kavanagh (1795–1844)
  • Chargé d’Affaires, Portugal (1835–1841)
• *John F. Keane (1944–)
  • Ambassador Extraordinary and Plenipotentiary, Paraguay (2002–2005)
• Kenneth Barnard Keating (1900–1975)
  • Ambassador Extraordinary and Plenipotentiary, India (1969–1972)
  • Ambassador Extraordinary and Plenipotentiary, Israel (1973–1975)
• Robert Brendon Keating (1924–2012)
  • Ambassador Extraordinary and Plenipotentiary, Comoros (1983–1986)
  • Ambassador Extraordinary and Plenipotentiary, Madagascar (1983–1986)
• Alton Gold Keel Jr. (1943–)
  • U.S. Permanent Representative on the Council of the North Atlantic Treaty Organization (1987–1989)
• *James Hugh Keeley Jr. (1895–1985)
  • Envoy Extraordinary and Minister Plenipotentiary, Syria (1947–1950)
• *Robert Vossler Keeley (1929–2015)
  • Chargé d’Affaires ad interim, Uganda (1973)
  • Ambassador Extraordinary and Plenipotentiary, Mauritius (1976–1978)
  • Ambassador Extraordinary and Plenipotentiary, Zimbabwe (1980–1984)
  • Ambassador Extraordinary and Plenipotentiary, Greece (1985–1989)
• *Leo John Keena (1878–1967)
  • Envoy Extraordinary and Minister Plenipotentiary, Honduras (1935–1937)
  • Envoy Extraordinary and Minister Plenipotentiary, South Africa (1937–1942)
• *Kelly Keiderling-Franz (?–)
  • Ambassador Extraordinary and Plenipotentiary, Uruguay (2016–2019)
• Anthony Michael Keiley (1835–1905)
  • Envoy Extraordinary and Minister Plenipotentiary, Austria (1885)
  • Envoy Extraordinary and Minister Plenipotentiary, Italy (1885)
• *James R. Keith (1957–)
  • Ambassador Extraordinary and Plenipotentiary, Malaysia (2007–2009)
• *Kenton Wesley Keith (1939–)
  • Ambassador Extraordinary and Plenipotentiary, Qatar (1992–1995)
• *Edward Eugene Keller Jr. (1929–2009)
  • Chargé d’Affaires ad interim, Yemen (1969)
• Frank Billings Kellogg (1856–1937)
  • Ambassador Extraordinary and Plenipotentiary, United Kingdom (1923–1925)
  • Secretary of State (1925–1929)
• William Kellogg (1814–1872)
  • Minister Resident, Guatemala (1864)
• *Craig Allen Kelly (1953–)
  • Ambassador Extraordinary and Plenipotentiary, Chile (2004–2007)
• *Ian C. Kelly (1953–)
  • Representative of the U.S.A. to the Organization for Security and Cooperation in Europe (Vienna) (2010–2013)
  • Ambassador Extraordinary and Plenipotentiary, Georgia (2015–2018)
• James Andrew Kelly (1936–)
  • Assistant Secretary of State for East Asian and Pacific Affairs (2001–2005)
• *John Hubert Kelly (1939–2011)
  • Ambassador Extraordinary and Plenipotentiary, Lebanon (1986–1988)
  • Assistant Secretary of State for Near Eastern Affairs (1989–1991)
  • Ambassador Extraordinary and Plenipotentiary, Finland (1991–1994)
• Paul Vincent Kelly (1947–)
  • Assistant Secretary of State for Legislative Affairs (2001–2005)
• *Thomas P. Kelly III (1961–)
  • Ambassador Extraordinary and Plenipotentiary, Djibouti (2014–2017)
• *LaRae Washington Kemp (1941–)
  • Director of the Office of Medical Services (1991–1994)
• James Scott Kemper (1886–1981)
  • Ambassador Extraordinary and Plenipotentiary, Brazil (1953–1955)
• *Lisa D. Kenna (1965–)
  • Executive Secretary (2017)
• *George Frost Kennan (1904–2005)
  • Director of Policy Planning (1947–1949)
  • Counselor (1949–1951)
  • Ambassador Extraordinary and Plenipotentiary, Russia (1952)
  • Ambassador Extraordinary and Plenipotentiary, Socialist Federal Republic of Yugoslavia (1961–1963)
• William E. Kennard (1957–)
  • Representative of the U.S.A. to the European Union, with the rank and status of Ambassador Extraordinary and Plenipotentiary (2009–2013)
• Caroline Bouvier Kennedy (1957–)
  • Ambassador Extraordinary and Plenipotentiary, Japan (2013–2017)
• David Matthew Kennedy (1905–1996)
  • Ambassador at Large (1971–1973)
  • U.S. Permanent Representative on the Council of the North Atlantic Treaty Organization (1972–1973)
• Joseph Patrick Kennedy (1888–1969)
  • Ambassador Extraordinary and Plenipotentiary, United Kingdom (1938–1940)
• *Laura Elizabeth Kennedy (1951–)
  • Ambassador Extraordinary and Plenipotentiary, Turkmenistan (2001–2003)
• Rodney O’Gliasain Kennedy-Minott (1928–2004)
  • Ambassador Extraordinary and Plenipotentiary, Sweden (1977–1980)
• *Patrick Francis Kennedy (1949–)
  • Assistant Secretary of State for Administration (1993–2001)
  • Under Secretary of State for Management (2007–2017)
  • Representative of the U.S.A. to the European Office of the United Nations (Geneva) (Nomination of February 24, 2000, not acted upon by the Senate.)
• Richard Thomas Kennedy (1919–1998)
  • Representative of the U.S.A. to the International Atomic Energy Agency (Vienna) (1981–1993)
  • Under Secretary of State for Management (1981–1982)
  • Ambassador at Large (1982–1993)
• *Kristie Ann Kenney (1955–)
  • Executive Secretary (1998–2001)
  • Ambassador Extraordinary and Plenipotentiary, Ecuador (2002–2005)
  • Ambassador Extraordinary and Plenipotentiary, Philippines (2006–2009)
  • Ambassador Extraordinary and Plenipotentiary, Thailand (2010–2014)
  • Career Ambassador (2012)
  • Counselor (2016–2017)
• James Casey Kenny (1953–)
  • Ambassador Extraordinary and Plenipotentiary, Ireland (2003–2006)
• James Keogh (1916–2006)
  • Director of the U.S. Information Agency (1973–1976)
• Richard C. Kerens (1841–1916)
  • Ambassador Extraordinary and Plenipotentiary, Austria (1909–1913)
• John Bozman Kerr (1809–1878)
  • Chargé d’Affaires, Nicaragua (1851–1853)
  • Chargé d’Affaires, Colombia (Not commissioned; nomination withdrawn before the Senate acted upon it.)
• John Forbes Kerry (1943–)
  • Secretary of State (2013–2017)
• *Atul Keshap (1971–)
  • Ambassador Extraordinary and Plenipotentiary, Maldives (2015–2018)
  • Ambassador Extraordinary and Plenipotentiary, Sri Lanka (2015–2018)
• *David McKendree Key II (1900–1988)
  • Ambassador Extraordinary and Plenipotentiary, Burma (1950–1951)
  • Assistant Secretary of State for International Organization Affairs (1953–1955)
• Alan L. Keyes (1950–)
  • Assistant Secretary of State for International Organization Affairs (1985–1987)
• Zalmay Khalilzad (1951–)
  • Ambassador Extraordinary and Plenipotentiary, Afghanistan (2003–2005)
  • Ambassador Extraordinary and Plenipotentiary, Iraq (2005–2007)
  • Representative of the U.S.A. to the United Nations (2007–2009)
• *Eric Khant (?–)
  • Chargé d’Affaires ad interim, Jamaica (2019)
• *Randolph Appleton Kidder (1913–1996)
  • Ambassador Extraordinary and Plenipotentiary, Cambodia (1964)
• *Lowell C. Kilday (1931–2011)
  • Ambassador Extraordinary and Plenipotentiary, Dominican Republic (1985–1988)
• *Andrew Ivy Killgore (1919–2016)
  • Ambassador Extraordinary and Plenipotentiary, Qatar (1977–1980)
• David Killion (1966–)
  • U.S. Permanent Representative to the United Nations Educational, Scientific and Cultural Organization (2009–2013)
• Judson Kilpatrick (1836–1881)
  • Envoy Extraordinary and Minister Plenipotentiary, Chile (1865–1870)
  • Envoy Extraordinary and Minister Plenipotentiary, Chile (1881)
• *Sung Y. Kim (1960–)
  • Ambassador Extraordinary and Plenipotentiary, Korea (2011–2014)
  • Ambassador Extraordinary and Plenipotentiary, Philippines (2016–2020)
  • Ambassador Extraordinary and Plenipotentiary, Indonesia (2020)
• *Yuri Kim (?–)
  • Ambassador Extraordinary and Plenipotentiary, Albania (2019)
• Henry L. Kimelman (1921–2009)
  • Ambassador Extraordinary and Plenipotentiary, Haiti (1980–1981)
• Mark Kimmitt (1954–)
  • Assistant Secretary of State for Politico-Military Affairs (2008–2009)
• Robert Michael Kimmitt (1947–)
  • Under Secretary of State for Political Affairs (1989–1991)
  • Ambassador Extraordinary and Plenipotentiary, Germany (1991–1993)
• *Barrington King (1930–2006)
  • Ambassador Extraordinary and Plenipotentiary, Brunei (1984–1987)
• Betty E. King (1944–)
  • Representative of the U.S.A. to the European Office of the United Nations (Geneva) (2010–2013)
• David Sjodahl King (1917–2009)
  • Ambassador Extraordinary and Plenipotentiary, Madagascar (1967–1969)
  • Ambassador Extraordinary and Plenipotentiary, Mauritius (1968–1969)
• Hamilton King (1852–1912)
  • Minister Resident/Consul General, Thailand (1898–1903)
  • Envoy Extraordinary and Minister Plenipotentiary, Thailand (1903–1912)
• Rufus King (1755–1827)
  • Minister Plenipotentiary, United Kingdom (1796–1803)
  • Envoy Extraordinary and Minister Plenipotentiary, United Kingdom (1825–1826)
• Rufus King (1814–1876)
  • Minister Resident, Holy See (1861)
  • Minister Resident, Holy See (1863–1867)
• *Spencer Mathews King (1917–1988)
  • Ambassador Extraordinary and Plenipotentiary, Guyana (1969–1974)
• Stephen B. King (?–)
  • Ambassador Extraordinary and Plenipotentiary, Czech Republic (2017)
• William Rufus de Vane King (1786–1853)
  • Envoy Extraordinary and Minister Plenipotentiary, France (1844–1846)
• Yelverton P. King (1794–1868)
  • Chargé d’Affaires, Colombia (1851–1853)
• Alfred Hugh Kingon (1931–)
  • Representative of the U.S.A. to the European Union, with the rank and status of Ambassador Extraordinary and Plenipotentiary (1987–1989)
• William Burnet Kinney (1799–1880)
  • Chargé d’Affaires, Italy (1850–1853)
• William Roscoe Kintner (1915–1997)
  • Ambassador Extraordinary and Plenipotentiary, Thailand (1973–1975)
• *Harmon Elwood Kirby (1934–2014)
  • Ambassador Extraordinary and Plenipotentiary, Togo (1990–1994)
• John F. Kirby (?–)
  • Assistant Secretary of State for Public Affairs (2015–2017)
• *Michael David Kirby (1953–)
  • Ambassador Extraordinary and Plenipotentiary, Moldova (2006–2008)
  • Ambassador Extraordinary and Plenipotentiary, Serbia (2012–2016)
• Alan Goodrich Kirk (1888–1963)
  • Ambassador Extraordinary and Plenipotentiary, Belgium (1946–1949)
  • Envoy Extraordinary and Minister Plenipotentiary, Luxembourg (1946–1949)
  • Ambassador Extraordinary and Plenipotentiary, Russia (1949–1951)
  • Ambassador Extraordinary and Plenipotentiary, China (1962–1963)
• *Alexander Comstock Kirk (1888–1979)
  • Chargé d’Affaires ad interim, Germany (1940)
  • Envoy Extraordinary and Minister Plenipotentiary, Egypt (1941–1944)
  • Envoy Extraordinary and Minister Plenipotentiary, Saudi Arabia (1941–1943)
  • Ambassador Extraordinary and Plenipotentiary, Greece (1943)
  • Ambassador Extraordinary and Plenipotentiary, Italy (1944–1946)
• Robert Crothers Kirk (1821–1898)
  • Minister Resident, Argentina (1862–1866)
  • Minister Resident, Argentina (1869–1871)
  • Minister Resident, Uruguay (1869–1870)
• *Roger Kirk (1930–)
  • Ambassador Extraordinary and Plenipotentiary, Somalia (1973–1975)
  • Representative of the U.S.A. to the United Nations Industrial Development Organization (Vienna) (1980–1983)
  • Ambassador Extraordinary and Plenipotentiary, Romania (1985–1989)
• Jeane Jordan Kirkpatrick (1926–2006)
  • Representative of the U.S.A. to the United Nations (1981–1985)
• Samuel Jordan Kirkwood (1813–1894)
  • Minister Resident, Denmark (1863)
• Henry A. (Heinz Alfred) Kissinger (1923–2023)
  • Secretary of State (1973–1977)
• *Michael S. Klecheski (?–)
  • Ambassador Extraordinary and Plenipotentiary, Mongolia (2019)
• *Hans G. Klemm (1957–)
  • Ambassador Extraordinary and Plenipotentiary, Timor-Leste (2007–2010)
  • Ambassador Extraordinary and Plenipotentiary, Romania (2015–2019)
• *Alfred Will Klieforth (1889–1969)
  • Chargé d’Affaires ad interim, Czechoslovakia ()
• Matthew S. Klimow (?–)
  • Ambassador Extraordinary and Plenipotentiary, Turkmenistan (2019)
• *Michael Klosson (1949–)
  • Ambassador Extraordinary and Plenipotentiary, Cyprus (2002–2005)
• Douglas Kmiec (1951–)
  • Ambassador Extraordinary and Plenipotentiary, Malta (2009–2011)
• *Paul Knabenshue (1883–1942)
  • Minister Resident/Consul General, Iraq (1932–1933)
  • Minister Resident/Consul General, Iraq (1933–1942)
• *Marc E. Knapper (?–)
  • Chargé d’Affaires ad interim, Korea (2018)
• Richard Francis Kneip (1933–1987)
  • Ambassador Extraordinary and Plenipotentiary, Singapore (1978–1980)
• *James Knight (1948–)
  • Ambassador Extraordinary and Plenipotentiary, Benin (2009–2012)
  • Ambassador Extraordinary and Plenipotentiary, Chad (2013–2016)
• *Ridgway Brewster Knight (1911–2001)
  • Ambassador Extraordinary and Plenipotentiary, Syria (1961–1965)
  • Chargé d’Affaires ad interim, Syria (1962)
  • Ambassador Extraordinary and Plenipotentiary, Belgium (1965–1969)
  • Ambassador Extraordinary and Plenipotentiary, Portugal (1969–1973)
• Horace Greeley Knowles (1863–1913)
  • Diplomatic Agent, Bulgaria (1907–1909)
  • Envoy Extraordinary and Minister Plenipotentiary, Serbia (1907–1909)
  • Envoy Extraordinary and Minister Plenipotentiary, Serbia (1907)
  • Envoy Extraordinary and Minister Plenipotentiary, Romania (1907)
  • Envoy Extraordinary and Minister Plenipotentiary, Romania (1907–1909)
  • Minister Resident/Consul General, Dominican Republic (1909–1910)
  • Envoy Extraordinary and Minister Plenipotentiary, Nicaragua (1909)
  • Envoy Extraordinary and Minister Plenipotentiary, Bolivia (1910–1913)
• *Clinton Everett Knox (1908–1980)
  • Ambassador Extraordinary and Plenipotentiary, Benin (1964–1969)
  • Ambassador Extraordinary and Plenipotentiary, Haiti (1969–1973)
• Philander Chase Knox (1853–1921)
  • Secretary of State (1909–1913)
• *John M. Koenig (1958–)
  • Ambassador Extraordinary and Plenipotentiary, Cyprus (2012–2015)
• Gustavus Koerner (1809–1896)
  • Envoy Extraordinary and Minister Plenipotentiary, Spain (1862–1864)
• Harold Hongju Koh (1954–)
  • Assistant Secretary of State for Democracy, Human Rights, and Labor (1998–2001)
  • Legal Adviser (2009–2013)
• *Foy David Kohler (1908–1990)
  • Assistant Secretary of State for European and Eurasian Affairs (1959–1962)
  • Ambassador Extraordinary and Plenipotentiary, Russia (1962–1966)
  • Career Ambassador (1964)
  • Deputy Under Secretary of State for Political Affairs (1966–1967)
• W. Robert Kohorst (?–)
  • Ambassador Extraordinary and Plenipotentiary, Croatia (2017)
• *Jimmy J. Kolker (1948–)
  • Ambassador Extraordinary and Plenipotentiary, Burkina Faso (1999–2002)
  • Ambassador Extraordinary and Plenipotentiary, Uganda (2002–2005)
• Robert William Komer (1922–2000)
  • Ambassador Extraordinary and Plenipotentiary, Turkey (1968–1969)
• Constantine William Kontos (1922–2000)
  • Ambassador Extraordinary and Plenipotentiary, Sudan (1980–1983)
• *Donald W. Koran (1955–)
  • Ambassador Extraordinary and Plenipotentiary, Rwanda (2011–2015)
• Jerome M. Korcak (1937–)
  • Director of the Office of Medical Services (1980–1984)
• *John Florian Kordek (1938–)
  • Ambassador Extraordinary and Plenipotentiary, Botswana (1988–1989)
• *Henry Lloyd Thornell Koren (1911–1994)
  • Ambassador Extraordinary and Plenipotentiary, Congo (Brazzaville) (1964–1965)
• *David Adolph Korn (1930–)
  • Chargé d’Affaires ad interim, Ethiopia (1985)
  • Ambassador Extraordinary and Plenipotentiary, Togo (1986–1988)
• *John Christian Kornblum (1943–)
  • Assistant Secretary of State for European and Eurasian Affairs (1996–1997)
  • Ambassador Extraordinary and Plenipotentiary, Germany (1997–2001)
• Karen Kornblum (1963–)
  • Representative of the U.S.A. to the Organization for Economic Cooperation and Development (Paris) (2009–2012)
• Joseph Saul Kornfeld (1876–1943)
  • Envoy Extraordinary and Minister Plenipotentiary, Iran (1921–1924)
• Tom C. Korologos (1933–)
  • Ambassador Extraordinary and Plenipotentiary, Belgium (2004–2007)
• Edward Malcolm Korry (1922–2003)
  • Ambassador Extraordinary and Plenipotentiary, Ethiopia (1963–1967)
  • Ambassador Extraordinary and Plenipotentiary, Chile (1967–1971)
• Penne Percy Korth (1942–)
  • Ambassador Extraordinary and Plenipotentiary, Mauritius (1989–1992)
• *Philip S. Kosnett (?–)
  • Ambassador Extraordinary and Plenipotentiary, Kosovo (2018)
• *David Kostelancik (?–)
  • Chargé d’Affaires ad interim, Hungary (2018)
• Eleni Tsakopoulos Kounalakis (1966–)
  • Ambassador Extraordinary and Plenipotentiary, Hungary (2009–2013)
• *Steven Koutsis (?–)
  • Chargé d’Affaires, Sudan (2019)
• Michael G. Kozak (1946–)
  • Principal Officer, Cuba (1999)
  • Ambassador Extraordinary and Plenipotentiary, Belarus (2000–2003)
  • Ambassador Extraordinary and Plenipotentiary, El Salvador (Nomination not acted upon by the Senate.)
• Keith Krach (?–)
  • Under Secretary for Economic Growth, Energy, and the Environment (2019)
• *Thomas Charles Krajeski (1950–)
  • Ambassador Extraordinary and Plenipotentiary, Yemen (2004–2007)
  • Ambassador Extraordinary and Plenipotentiary, Bahrain (2011–2014)
• David J. Kramer (1964–)
  • Assistant Secretary of State for Democracy, Human Rights, and Labor (2008–2009)
• Mary Kramer (1935–)
  • Ambassador Extraordinary and Plenipotentiary, Dominica (2003–2006)
  • Ambassador Extraordinary and Plenipotentiary, Barbados (2003–2006)
  • Ambassador Extraordinary and Plenipotentiary, Antigua and Barbuda (2003–2006)
  • Ambassador Extraordinary and Plenipotentiary, Grenada (2003–2006)
  • Ambassador Extraordinary and Plenipotentiary, Saint Vincent and the Grenadines (2003–2006)
  • Ambassador Extraordinary and Plenipotentiary, Saint Lucia (2003–2006)
  • Ambassador Extraordinary and Plenipotentiary, Saint Kitts and Nevis (2003–2006)
• Stephen Krasner (1942–)
  • Director of Policy Planning (2005–2007)
• *Max Vance Krebs (1916–2006)
  • Ambassador Extraordinary and Plenipotentiary, Guyana (1974–1976)
• George Lewis Kreeck (1882–1945)
  • Envoy Extraordinary and Minister Plenipotentiary, Paraguay (1925–1930)
• Victor John Krehbiel (1905–1997)
  • Ambassador Extraordinary and Plenipotentiary, Finland (1973–1975)
• *Daniel Kritenbrink (?–)
  • Ambassador Extraordinary and Plenipotentiary, Vietnam (2017)
• *George Albert Krol (1956–)
  • Ambassador Extraordinary and Plenipotentiary, Belarus (2003–2006)
  • Ambassador Extraordinary and Plenipotentiary, Uzbekistan (2011–2014)
  • Ambassador Extraordinary and Plenipotentiary, Kazakhstan (2014–2018)
  • Ambassador Extraordinary and Plenipotentiary, Turkmenistan (Nomination of June 27, 2007, withdrawn on April 28, 2008.)
• Howard J. Krongard (1940–)
  • Inspector General of the Department of State and the Foreign Service (2005–2008)
• Robert C. Krueger (1935–)
  • Ambassador at Large (1979–1981)
  • Ambassador Extraordinary and Plenipotentiary, Burundi (1994–1995)
  • Ambassador Extraordinary and Plenipotentiary, Botswana (1996–1999)
• *Sheldon J. Krys (1934–)
  • Ambassador Extraordinary and Plenipotentiary, Trinidad and Tobago (1985–1988)
  • Assistant Secretary of State for Administration (1988–1989)
  • Assistant Secretary of State for Diplomatic Security (1989–1992)
• *Elmer Gregory Kryza (1922–1998)
  • Ambassador Extraordinary and Plenipotentiary, Mauritania (1977–1980)
• *Jack Bloom Kubisch (1921–2007)
  • Assistant Secretary of State for Western Hemisphere Affairs (1973–1974)
  • Ambassador Extraordinary and Plenipotentiary, Greece (1974–1977)
• *Lisa J. Kubiske (1954–)
  • Ambassador Extraordinary and Plenipotentiary, Honduras (2011–2014)
• *Ronald Karl Kuchel (1939–)
  • Ambassador Extraordinary and Plenipotentiary, Zambia (1993–1996)
• Madeleine May Kunin (1933–)
  • Ambassador Extraordinary and Plenipotentiary, Switzerland (1996–1999)
  • Ambassador Extraordinary and Plenipotentiary, Liechtenstein (1997–1999)
• *Daniel Charles Kurtzer (1949–)
  • Ambassador Extraordinary and Plenipotentiary, Egypt (1997–2001)
  • Ambassador Extraordinary and Plenipotentiary, Israel (2001–2005)
• *Len Kusnitz (1956–)
  • Chargé d’Affaires ad interim, Trinidad and Tobago (2010)
• Laurence Sherman Kuter (1905–1979)
  • Representative of the U.S.A. on the Council of the International Civil Aviation Organization (Montreal) (1947–1948)
• *Dennis Kux (1931–)
  • Ambassador Extraordinary and Plenipotentiary, Côte d’Ivoire (1986–1989)
• Edwin Jackson Kyle (1876–1963)
  • Ambassador Extraordinary and Plenipotentiary, Guatemala (1945–1948)