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 September 25, 2017, Sharon Day was sworn in as the 59th Ambassador to the Republic of Costa Rica.

List of ambassadors of the United States to Costa Rica

Section Title:
Table Section Text: The following is a list of United States Ambassadors, or other Chiefs of Mission, to Costa Rica. On September 25, 2017, Sharon Day was sworn in as the 59th 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

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

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 C. 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

Richard Cutts Shannon	Envoy Extraordinary and Minister Plenipotentiary	October 31, 1891	April 30, 1893

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

John F. Martin, Jr.	Chargé d'Affaires ad interim	October 15, 1920	January 1921

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

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

Arthur Bliss Lane	Envoy Extraordinary and Minister Plenipotentiary	October 27, 1941	March 17, 1942

Robert M. Scotten	Envoy Extraordinary and Minister Plenipotentiary	March 31, 1942	April 20, 1943

Fay Allen Des Portes	Ambassador Extraordinary and Plenipotentiary	May 20, 1943	September 11, 1944

Hallett Johnson	Ambassador Extraordinary and Plenipotentiary	February 14, 1945	May 16, 1947

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

Joseph Flack	Ambassador Extraordinary and Plenipotentiary	August 13, 1949	September 21, 1950

Philip Bracken Fleming	Ambassador Extraordinary and Plenipotentiary	November 20, 1951	August 7, 1953

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

Whiting Willauer	Ambassador Extraordinary and Plenipotentiary	May 5, 1958	April 17, 1961

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

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

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

Deane Roesch Hinton	Ambassador Extraordinary and Plenipotentiary	November 17, 1987	January 4, 1990

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 1993	July 1993	Bill Clinton

Donald Harrington	Chargé d'Affaires ad interim	July 1993	August 1993

Joseph Becelia	Chargé d'Affaires ad interim	August 1993	October 1994

Peter Jon de Vos	Ambassador Extraordinary and Plenipotentiary	October 21, 1994	October 14, 1997

Thomas J. Dodd, Jr.	Ambassador Extraordinary and Plenipotentiary	November 26, 1997	March 1, 2001

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

Peter M. Brennan	Chargé d'Affaires ad interim	August 2007	May 2008

Peter Cianchette	Ambassador Extraordinary and Plenipotentiary	May 5, 2008	June 19, 2009

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

Sharon Day	Ambassador Extraordinary and Plenipotentiary	September 25, 2017	present	Donald Trump

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