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.
RepresentativeTitlePresentation
of Credentials		Termination
of Mission		Appointed by
Solon BorlandEnvoy Extraordinary and Minister PlenipotentiaryApril 17, 1854Franklin Pierce
Mirabeau B. LamarMinister ResidentSeptember 14, 1858May 20, 1859James Buchanan
Alexander DimitryMinister ResidentSeptember 29, 1859April 27, 1861James Buchanan
Charles N. RiotteMinister ResidentAugust 29, 1861January 18, 1867Abraham Lincoln
Albert G. LawrenceMinister ResidentJanuary 18, 1867June 24, 1868Andrew Johnson
Jacob B. BlairMinister ResidentOctober 6, 1868June 30, 1873Andrew Johnson
George WilliamsonMinister ResidentAugust 13, 1873January 31, 1879Ulysses S. Grant
Cornelius A. LoganMinister ResidentDecember 25, 1879April 17, 1882Rutherford B. Hayes
Henry Cook HallEnvoy Extraordinary and Minister PlenipotentiaryNovember 22, 1882May 16, 1889Chester A. Arthur
Lansing B. MiznerEnvoy Extraordinary and Minister PlenipotentiaryAugust 30, 1889December 31, 1890Benjamin Harrison
Romualdo PachecoEnvoy Extraordinary and Minister PlenipotentiaryMay 7, 1891October 31, 1891Benjamin Harrison
Richard Cutts ShannonEnvoy Extraordinary and Minister PlenipotentiaryOctober 31, 1891April 30, 1893Benjamin Harrison
Lewis BakerEnvoy Extraordinary and Minister PlenipotentiaryMay 20, 1893December 9, 1897Grover Cleveland
William L. MerryEnvoy Extraordinary and Minister PlenipotentiaryJanuary 15, 1898March 4, 1911William McKinley
Lewis EinsteinEnvoy Extraordinary and Minister PlenipotentiaryNovember 3, 1911December 29, 1911William H. Taft
Edward J. HaleEnvoy Extraordinary and Minister PlenipotentiaryAugust 29, 1913April 19, 1917Woodrow Wilson
Stewart JohnsonChargé d'Affaires ad interimApril 19, 1917December 5, 1918Woodrow Wilson
John F. Martin, Jr.Chargé d'Affaires ad interimOctober 15, 1920January 1921Woodrow Wilson
Walter C. ThurstonChargé d'Affaires ad interimJanuary 1921March 1922Warren G. Harding
Roy T. DavisEnvoy Extraordinary and Minister PlenipotentiaryMarch 14, 1922January 4, 1930Warren G. Harding
Charles C. EberhardtEnvoy Extraordinary and Minister PlenipotentiaryMarch 14, 1930September 24, 1933Herbert Hoover
Leo R. SackEnvoy Extraordinary and Minister PlenipotentiaryOctober 16, 1933January 10, 1937Franklin D. Roosevelt
William H. HornibrookEnvoy Extraordinary and Minister PlenipotentiarySeptember 2, 1937September 1, 1941Franklin D. Roosevelt
Arthur Bliss LaneEnvoy Extraordinary and Minister PlenipotentiaryOctober 27, 1941March 17, 1942Franklin D. Roosevelt
Robert M. ScottenEnvoy Extraordinary and Minister PlenipotentiaryMarch 31, 1942April 20, 1943Franklin D. Roosevelt
Fay Allen Des PortesAmbassador Extraordinary and PlenipotentiaryMay 20, 1943September 11, 1944Franklin D. Roosevelt
Hallett JohnsonAmbassador Extraordinary and PlenipotentiaryFebruary 14, 1945May 16, 1947Franklin D. Roosevelt
Walter J. DonnellyAmbassador Extraordinary and PlenipotentiaryJune 27, 1947October 15, 1947Harry S. Truman
Nathaniel Penistone DavisAmbassador Extraordinary and PlenipotentiaryJanuary 31, 1948June 8, 1949Harry S. Truman
Joseph FlackAmbassador Extraordinary and PlenipotentiaryAugust 13, 1949September 21, 1950Harry S. Truman
Philip Bracken FlemingAmbassador Extraordinary and PlenipotentiaryNovember 20, 1951August 7, 1953Harry S. Truman
Robert C. HillAmbassador Extraordinary and PlenipotentiaryNovember 4, 1953September 10, 1954Dwight D. Eisenhower
Robert F. WoodwardAmbassador Extraordinary and PlenipotentiaryDecember 3, 1954March 15, 1958Dwight D. Eisenhower
Whiting WillauerAmbassador Extraordinary and PlenipotentiaryMay 5, 1958April 17, 1961Dwight D. Eisenhower
Raymond TellesAmbassador Extraordinary and PlenipotentiaryMay 22, 1961February 19, 1967John F. Kennedy
Clarence A. BoonstraAmbassador Extraordinary and PlenipotentiaryMarch 8, 1967August 11, 1969Lyndon B. Johnson
Walter C. PloeserAmbassador Extraordinary and PlenipotentiaryApril 27, 1970April 13, 1972Richard Nixon
Viron P. VakyAmbassador Extraordinary and PlenipotentiaryOctober 17, 1972February 9, 1974Richard Nixon
Terence A. TodmanAmbassador Extraordinary and PlenipotentiaryMarch 17, 1975January 24, 1977Gerald Ford
Marvin WeissmanAmbassador Extraordinary and PlenipotentiaryJune 28, 1977March 22, 1980Jimmy Carter
Francis J. McNeilAmbassador Extraordinary and PlenipotentiaryJuly 8, 1980June 27, 1983Jimmy Carter
Curtin Winsor, Jr.Ambassador Extraordinary and PlenipotentiaryJuly 14, 1983February 18, 1985Ronald Reagan
Lewis Arthur TambsAmbassador Extraordinary and PlenipotentiaryAugust 1, 1985January 1, 1987Ronald Reagan
Deane Roesch HintonAmbassador Extraordinary and PlenipotentiaryNovember 17, 1987January 4, 1990Ronald Reagan
Luis Guinot, Jr.Ambassador Extraordinary and PlenipotentiaryAugust 27, 1991March 1, 1993George H. W. Bush
Robert O. HommeChargé d'Affaires ad interimMarch 1993July 1993Bill Clinton
Donald HarringtonChargé d'Affaires ad interimJuly 1993August 1993Bill Clinton
Joseph BeceliaChargé d'Affaires ad interimAugust 1993October 1994Bill Clinton
Peter Jon de VosAmbassador Extraordinary and PlenipotentiaryOctober 21, 1994October 14, 1997Bill Clinton
Thomas J. Dodd, Jr.Ambassador Extraordinary and PlenipotentiaryNovember 26, 1997March 1, 2001Bill Clinton
John J. DanilovichAmbassador Extraordinary and PlenipotentiaryOctober 10, 2001June 1, 2004George W. Bush
Mark LangdaleAmbassador Extraordinary and PlenipotentiaryNovember 8, 2005July 31, 2007George W. Bush
Peter M. BrennanChargé d'Affaires ad interimAugust 2007May 2008George W. Bush
Peter CianchetteAmbassador Extraordinary and PlenipotentiaryMay 5, 2008June 19, 2009George W. Bush
Anne S. AndrewAmbassador Extraordinary and PlenipotentiaryDecember 29, 2009June 12, 2013Barack Obama
S. Fitzgerald HaneyAmbassador Extraordinary and PlenipotentiaryJune 28, 2015July 15, 2017Barack Obama
Sharon DayAmbassador Extraordinary and PlenipotentiarySeptember 25, 2017presentDonald Trump