List of ambassadors of the United States to Costa Rica
# List of ambassadors of the United States to Costa Rica

The following is a list of United States ambassadors, or other chiefs of mission, to Costa Rica. On February 16, 2022, Cynthia Telles was sworn in as the 60th ambassador to the Republic of Costa Rica.

| Representative | Title | Presentation of credentials | Termination of mission | Appointed by |
| - | - | - | - | - |
| Solon Borland | Envoy Extraordinary and Minister Plenipotentiary | | April 17, 1854 | Franklin Pierce |
| Mirabeau B. Lamar | Minister Resident | September 14, 1858 | May 20, 1859 | James Buchanan |
| Alexander Dimitry | Minister Resident | September 29, 1859 | April 27, 1861 | James Buchanan |
| Charles N. Riotte | Minister Resident | August 29, 1861 | January 18, 1867 | Abraham Lincoln |
| Albert G. Lawrence | Minister Resident | January 18, 1867 | June 24, 1868 | Andrew Johnson |
| Jacob B. Blair | Minister Resident | October 6, 1868 | June 30, 1873 | Andrew Johnson |
| George Williamson | Minister Resident | August 13, 1873 | January 31, 1879 | Ulysses S. Grant |
| Cornelius A. Logan | Minister Resident | December 25, 1879 | April 17, 1882 | Rutherford B. Hayes |
| Henry Cook Hall | Envoy Extraordinary and Minister Plenipotentiary | November 22, 1882 | May 16, 1889 | Chester A. Arthur |
| Lansing B. Mizner | Envoy Extraordinary and Minister Plenipotentiary | August 30, 1889 | December 31, 1890 | Benjamin Harrison |
| Romualdo Pacheco | Envoy Extraordinary and Minister Plenipotentiary | May 7, 1891 | October 31, 1891 | Benjamin Harrison |
| Richard Cutts Shannon | Envoy Extraordinary and Minister Plenipotentiary | October 31, 1891 | April 30, 1893 | Benjamin Harrison |
| Lewis Baker | Envoy Extraordinary and Minister Plenipotentiary | May 20, 1893 | December 9, 1897 | Grover Cleveland |
| William L. Merry | Envoy Extraordinary and Minister Plenipotentiary | January 15, 1898 | March 4, 1911 | William McKinley |
| Lewis Einstein | Envoy Extraordinary and Minister Plenipotentiary | November 3, 1911 | December 29, 1911 | William H. Taft |
| Edward J. Hale | Envoy Extraordinary and Minister Plenipotentiary | August 29, 1913 | April 19, 1917 | Woodrow Wilson |
| Stewart Johnson | Chargé d'Affaires ad interim | April 19, 1917 | December 5, 1918 | Woodrow Wilson |
| John F. Martin, Jr. | Chargé d'Affaires ad interim | October 15, 1920 | January 1921 | Woodrow Wilson |
| Walter C. Thurston | Chargé d'Affaires ad interim | January 1921 | March 1922 | Warren G. Harding |
| Roy T. Davis | Envoy Extraordinary and Minister Plenipotentiary | March 14, 1922 | January 4, 1930 | Warren G. Harding |
| Charles C. Eberhardt | Envoy Extraordinary and Minister Plenipotentiary | March 14, 1930 | September 24, 1933 | Herbert Hoover |
| Leo R. Sack | Envoy Extraordinary and Minister Plenipotentiary | October 16, 1933 | January 10, 1937 | Franklin D. Roosevelt |
| William H. Hornibrook | Envoy Extraordinary and Minister Plenipotentiary | September 2, 1937 | September 1, 1941 | Franklin D. Roosevelt |
| Arthur Bliss Lane | Envoy Extraordinary and Minister Plenipotentiary | October 27, 1941 | March 17, 1942 | Franklin D. Roosevelt |
| Robert M. Scotten | Envoy Extraordinary and Minister Plenipotentiary | March 31, 1942 | April 20, 1943 | Franklin D. Roosevelt |
| Fay Allen Des Portes | Ambassador Extraordinary and Plenipotentiary | May 20, 1943 | September 11, 1944 | Franklin D. Roosevelt |
| Hallett Johnson | Ambassador Extraordinary and Plenipotentiary | February 14, 1945 | May 16, 1947 | Franklin D. Roosevelt |
| Walter J. Donnelly | Ambassador Extraordinary and Plenipotentiary | June 27, 1947 | October 15, 1947 | Harry S. Truman |
| Nathaniel Penistone Davis | Ambassador Extraordinary and Plenipotentiary | January 31, 1948 | June 8, 1949 | Harry S. Truman |
| Joseph Flack | Ambassador Extraordinary and Plenipotentiary | August 13, 1949 | September 21, 1950 | Harry S. Truman |
| Philip Bracken Fleming | Ambassador Extraordinary and Plenipotentiary | November 20, 1951 | August 7, 1953 | Harry S. Truman |
| Robert C. Hill | Ambassador Extraordinary and Plenipotentiary | November 4, 1953 | September 10, 1954 | Dwight D. Eisenhower |
| Robert F. Woodward | Ambassador Extraordinary and Plenipotentiary | December 3, 1954 | March 15, 1958 | Dwight D. Eisenhower |
| Whiting Willauer | Ambassador Extraordinary and Plenipotentiary | May 5, 1958 | April 17, 1961 | Dwight D. Eisenhower |
| Raymond Telles | Ambassador Extraordinary and Plenipotentiary | May 22, 1961 | February 19, 1967 | John F. Kennedy |
| Clarence A. Boonstra | Ambassador Extraordinary and Plenipotentiary | March 8, 1967 | August 11, 1969 | Lyndon B. Johnson |
| Walter C. Ploeser | Ambassador Extraordinary and Plenipotentiary | April 27, 1970 | April 13, 1972 | Richard Nixon |
| Viron P. Vaky | Ambassador Extraordinary and Plenipotentiary | October 17, 1972 | February 9, 1974 | Richard Nixon |
| Terence A. Todman | Ambassador Extraordinary and Plenipotentiary | March 17, 1975 | January 24, 1977 | Gerald Ford |
| Marvin Weissman | Ambassador Extraordinary and Plenipotentiary | June 28, 1977 | March 22, 1980 | Jimmy Carter |
| Francis J. McNeil | Ambassador Extraordinary and Plenipotentiary | July 8, 1980 | June 27, 1983 | Jimmy Carter |
| Curtin Winsor, Jr. | Ambassador Extraordinary and Plenipotentiary | July 14, 1983 | February 18, 1985 | Ronald Reagan |
| Lewis Arthur Tambs | Ambassador Extraordinary and Plenipotentiary | August 1, 1985 | January 1, 1987 | Ronald Reagan |
| Deane Roesch Hinton | Ambassador Extraordinary and Plenipotentiary | November 17, 1987 | January 4, 1990 | Ronald Reagan |
| Luis Guinot, Jr. | Ambassador Extraordinary and Plenipotentiary | August 27, 1991 | March 1, 1993 | George H. W. Bush |
| Robert O. Homme | Chargé d'Affaires ad interim | March 1, 1993 | July 1993 | Bill Clinton |
| Donald Harrington | Chargé d'Affaires ad interim | July 1993 | August 1993 | Bill Clinton |
| Joseph Becelia | Chargé d'Affaires ad interim | August 1993 | October 21, 1994 | Bill Clinton |
| Peter Jon de Vos | Ambassador Extraordinary and Plenipotentiary | October 21, 1994 | October 14, 1997 | Bill Clinton |
| Thomas J. Dodd, Jr. | Ambassador Extraordinary and Plenipotentiary | November 26, 1997 | March 1, 2001 | Bill Clinton |
| John J. Danilovich | Ambassador Extraordinary and Plenipotentiary | October 10, 2001 | June 1, 2004 | George W. Bush |
| Mark Langdale | Ambassador Extraordinary and Plenipotentiary | November 8, 2005 | July 31, 2007 | George W. Bush |
| Peter M. Brennan | Chargé d'Affaires ad interim | August 1, 2007 | May 5, 2008 | George W. Bush |
| Peter Cianchette | Ambassador Extraordinary and Plenipotentiary | May 5, 2008 | June 19, 2009 | George W. Bush |
| Anne S. Andrew | Ambassador Extraordinary and Plenipotentiary | December 29, 2009 | June 12, 2013 | Barack Obama |
| S. Fitzgerald Haney | Ambassador Extraordinary and Plenipotentiary | June 28, 2015 | July 15, 2017 | Barack Obama |
| Sharon Day | Ambassador Extraordinary and Plenipotentiary | September 25, 2017 | January 20, 2021 | Donald Trump |
| Cynthia Telles | Ambassador Extraordinary and Plenipotentiary | March 11, 2022 | Present | Joe Biden |
