John Slidell
Appointment: Mar 29, 1853
Note: Commissioned to Central America; declined appointment. Commissioned during a recess of the Senate.
Solon Borland
Appointment: Apr 18, 1853
Note:Commissioned to Central America; did not present credentials in Costa Rica. Commissioned during a recess of the Senate; recommissioned after confirmation on Feb 9, 1854.
Mirabeau B. Lamar
Appointment: Jan 20, 1858
Presentation of Credentials: Sep 14, 1858
Termination of Mission: Notified Govt. of Costa Rica by note from Releajo, Nicaragua, May 20, 1859, of termination of his mission
Note: Accredited also to Nicaragua; resident at Managua.
Alexander Dimitry
Appointment: Aug 15, 1859
Presentation of Credentials: Sep 29, 1859
Termination of Mission: Presented recall, Apr 27, 1861
Note: Commissioned during a recess of the Senate; recommissioned after confirmation on Jan 24, 1860. Accredited also to Nicaragua; resident at Managua.
Charles N. Riotte
Appointment: Jun 8, 1861
Presentation of Credentials: Aug 29, 1861
Termination of Mission: Presented recall, Jan 18, 1867
Note: Commissioned during a recess of the Senate; recommissioned after confirmation on Jul 22, 1861.
Albert G. Lawrence
Appointment: Oct 2, 1866
Presentation of Credentials: Jan 18, 1867
Termination of Mission: Probably presented recall soon after Jun 24, 1868
Note: Commissioned during a recess of the Senate; recommissioned after confirmation on Jan 11, 1867.
Thaddeus P. Mott
Note: Not commissioned; nomination withdrawn before the Senate acted upon it.
Jacob B. Blair
Appointment: Jul 25, 1868
Presentation of Credentials: Oct 6, 1868
Termination of Mission: Presented recall, Jun 30, 1873.
Charles N. Riotte
Note: Not commissioned; nomination tabled by the Senate.
George Williamson
Appointment: May 17, 1873
Presentation of Credentials: Aug 13, 1873
Termination of Mission: Notified Government of Costa Rica by note from Amapala, Honduras, Jan 31, 1879, that he had resigned
Note: Commissioned during a recess of the Senate; recommissioned after confirmation on Dec 10, 1873. Commissioned to "the Central American States" but accredited individually to Costa Rica, El Salvador, Guatemala, Honduras, and Nicaragua; resident at Guatemala.
Cornelius A. Logan
Appointment: Apr 2, 1879
Presentation of Credentials: [Dec 25, 1879]
Termination of Mission: Left San Jose, Apr 17, 1882
Note: Officially recognized on Dec 25, 1879. Commissioned to "the Central American States" but accredited individually to Costa Rica, El Salvador, Guatemala, Honduras, and Nicaragua; resident at Guatemala.
Henry C. Hall
Presentation of Credentials: Nov 22, 1882
Termination of Mission: Promoted to Envoy Extraordinary and Minister Plenipotentiary
Note:Presented credentials the same day as Minister Resident and as Envoy Extraordinary and Minister Plenipotentiary. Commissioned to "the Central American States" but accredited individually to Costa Rica, El Salvador, Guatemala, Honduras, and Nicaragua; resident at Guatemala.
Henry C. Hall
Presentation of Credentials: Nov 22, 1882
Termination of Mission: Transmitted recall by note on or shortly before May 16, 1889
Note: Commissioned to "the Central American States" but accredited individually to Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua; resident at Guatemala.
Lansing B. Mizner
Appointment: Mar 30, 1889
Presentation of Credentials: Aug 30, 1889
Termination of Mission: Relinquished charge at Guatemala, Dec 31, 1890
Note: Commissioned to "the Central American States" but accredited individually to Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua; resident at Guatemala.
Romualdo Pacheco
Appointment: Dec 11, 1890
Presentation of Credentials: May 7, 1891
Termination of Mission: Presented recall, Oct 31, 1891
Note:Commissioned to "the Central American States" but accredited individually to Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua; resident at Guatemala.
Richard Cutts Shannon
Appointment: Aug 8, 1891
Presentation of Credentials: Oct 31, 1891
Termination of Mission: Left Managua, Apr 30, 1893
Note: Also accredited to El Salvador and Nicaragua; resident at Managua. Note: Commissioned during a recess of the Senate; recommissioned after confirmation on Dec 23, 1891.
Lewis Baker
Appointment: Apr 4, 1893
Presentation of Credentials: May 20, 1893
Termination of Mission: Transmitted recall by note about Dec 9, 1897
Note: Also accredited to El Salvador and Nicaragua; resident Managua. Note: Accredited also to El Salvador and Nicaragua; resident at Managua. Transmitted credentials by note from Managua on this date.
William L. Merry
Appointment: Jul 17, 1897
Presentation of Credentials: Jan 15, 1898
Termination of Mission: Recommissioned to a different combination of countries
Note: Commissioned as Envoy Extraordinary and Minister Plenipotentiary to Nicaragua, Costa Rica, and El Salvador; resident at San Jose.
William L. Merry
Appointment: Dec 12, 1907
Termination of Mission: Recommissioned to Costa Rica only
Note: Commissioned as Envoy Extraordinary and Minister Plenipotentiary to Nicaragua and Costa Rica; resident at San Jose.
William L. Merry
Appointment: Jul 1, 1908
Presentation of Credentials: Left Costa Rica, Mar 4, 1911
Note: Commissioned during a recess of the Senate; recommissioned after confirmation on Dec 10, 1908.
Lewis Einstein
Appointment: Jul 6, 1911
Presentation of Credentials: Nov 3, 1911
Termination of Mission: Left post, Dec 29, 1911
Edward J. Hale
Non-career appointee
Appointment: Jun 21, 1913
Presentation of Credentials: Aug 29, 1913
Termination of Mission: Normal relations interrupted, Jan 27, 1917; new Government of Costa Rica still unrecognized by the U.S. when Hale left Costa Rica, Apr 19, 1917
Note: Stewart Johnson was serving as Chargé d'Affaires ad interim when Legation San Jose was closed, Dec 5, 1918. The Legation was reopened Oct 15, 1920 with John F. Martin, Jr., as Chargé d'Affaires ad interim. Walter C. Thurston served in that capacity, Jan 1921–Mar 1922.
Roy T. Davis
Non-career appointee
Appointment: Feb 10, 1922
Presentation of Credentials: Mar 14, 1922
Termination of Mission: Left Costa Rica, Jan 4, 1930
H. F. Arthur Schoenfeld
Appointment: Dec 16, 1929
Note: Did not serve under this appointment.
Charles C. Eberhardt
Appointment: Jan 9, 1930
Presentation of Credentials: Mar 14, 1930
Termination of Mission: Left Costa Rica, Sep 24, 1933
Leo R. Sack
Non-career appointee
Appointment: Aug 17, 1933
Presentation of Credentials: Oct 16, 1933
Termination of Mission: Left post, Jan 10, 1937
Note: Commissioned during a recess of the Senate; recommissioned after confirmation on Jan 15, 1934.
Edward Albright
Non-career appointee
Appointment: Apr 22, 1937
Note: Took oath of office, but died in the U.S. before proceeding to post.
William H. Hornibrook
Non-career appointee
Appointment: Jul 2, 1937
Presentation of Credentials: Sep 2, 1937
Termination of Mission: Relinquished charge, Sep 1, 1941
Arthur Bliss Lane
Appointment: Oct 9, 1941
Presentation of Credentials: Oct 27, 1941
Termination of Mission: Left post, Mar 17, 1942
Robert M. Scotten
Appointment: Mar 5, 1942
Presentation of Credentials: Mar 31, 1942
Termination of Mission: Left post, Apr 20, 1943
Fay A. DesPortes
Non-career appointee
Appointment: Mar 27, 1943
Presentation of Credentials: May 20, 1943
Termination of Mission: Left post, Sep 11, 1944
Hallett Johnson
Appointment: Dec 16, 1944
Presentation of Credentials: Feb 14, 1945
Termination of Mission: Left post, May 16, 1947
Walter J. Donnelly
Appointment: Apr 10, 1947
Presentation of Credentials: Jun 27, 1947
Termination of Mission: Left post, Oct 15, 1947
Nathaniel P. Davis
Appointment: Sep 30, 1947
Presentation of Credentials: Jan 31, 1948
Termination of Mission: Left post, Jun 8, 1949
Note:Commissioned during a recess of the Senate; recommissioned after confirmation on Dec 9, 1947.
Joseph Flack
Appointment: Jun 24, 1949
Presentation of Credentials: Aug 13, 1949
Termination of Mission: Left post, Sep 21, 1950
Philip B. Fleming
Non-career appointee
Appointment: Apr 18, 1951
Presentation of Credentials: Nov 20, 1951
Termination of Mission: Left post, Aug 7, 1953
Robert C. Hill
Non-career appointee
Appointment: Oct 23, 1953
Presentation of Credentials: Nov 4, 1953
Termination of Mission: Left post, Sep 10, 1954
Note: Commissioned during a recess of the Senate; recommissioned after confirmation on Jan 26, 1954.
Robert F. Woodward
Appointment: Sep 24, 1954
Presentation of Credentials: Dec 3, 1954
Termination of Mission: Left post, Mar 15, 1958
Note:Commissioned during a recess of the Senate; recommissioned after confirmation on Dec 3, 1954.
Whiting Willauer
Non-career appointee
Appointment: Apr 22, 1958
Presentation of Credentials: May 5, 1958
Termination of Mission: Left post, Apr 17, 1961
Raymond Telles
Non-career appointee
Appointment: Apr 6, 1961
Presentation of Credentials: May 22, 1961
Termination of Mission: Left post, Feb 19, 1967
Clarence A. Boonstra
Appointment: Jan 26, 1967
Presentation of Credentials: Mar 8, 1967
Termination of Mission: Left post, Aug 11, 1969
Walter C. Ploeser
Non-career appointee
Appointment: Apr 8, 1970
Presentation of Credentials: Apr 27, 1970
Termination of Mission: Left post, Apr 13, 1972
Viron P. Vaky
Appointment: Sep 11, 1972
Presentation of Credentials: Oct 17, 1972
Termination of Mission: Left post, Feb 9, 1974
Stanton D. Anderson
Non-career appointee
Note: Not commissioned; nomination of Apr 29, 1974 was not acted upon by the Senate.
Terence A. Todman
Appointment: Dec 18, 1974
Presentation of Credentials: Mar 17, 1975
Termination of Mission: Left post, Jan 24, 1977
Marvin Weissman
Non-career appointee
Appointment: May 26, 1977
Presentation of Credentials: Jun 28, 1977
Termination of Mission: Left post, Mar 22, 1980
Francis J. McNeil
Appointment: Jun 30, 1980
Presentation of Credentials: Jul 8, 1980
Termination of Mission: Left post, Jun 27, 1983
Curtin Winsor, Jr.
Non-career appointee
Appointment: May 26, 1983
Presentation of Credentials: Jul 14, 1983
Termination of Mission: Left post, Feb 18, 1985
Lewis Arthur Tambs
Non-career appointee
Appointment: Jul 12, 1985
Presentation of Credentials: Aug 1, 1985
Termination of Mission: Left post, Jan 1, 1987
Deane Roesch Hinton
Appointment: Nov 6, 1987
Presentation of Credentials: Nov 17, 1987
Termination of Mission: Left post, Jan 4, 1990
Note: Hinton was commissioned during a recess of the Senate as Ambassador to Panama, Jan 2, 1990, and presented his credentials there on Jan 9, 1990 (see under Panama).
Note:The following officers served as Chargé d'Affaires ad interim: Robert O. Homme (Mar–Jul 1993), Donald Harrington (Jul–Aug 1993), and Joseph Beceila (Aug 1993–Oct 1994).
Luis Guinot, Jr.
Non-career appointee
Appointment: Aug 2, 1991
Presentation of Credentials: Aug 27, 1991
Termination of Mission: Left post, Mar 1, 1993
Peter Jon de Vos
Appointment: Oct 5, 1994
Presentation of Credentials: Oct 21, 1994
Termination of Mission: Left post, Oct 14, 1997
Thomas J. Dodd
Non-career appointee
Appointment: Oct 14, 1997
Presentation of Credentials: Nov 26, 1997
Termination of Mission: Left post Mar 1, 2001
John J. Danilovich
Non-career appointee
Appointment: Oct 1, 2001
Presentation of Credentials: Oct 10, 2001
Termination of Mission: Left post, June 1, 2004
Mark Langdale
Non-career appointee
Appointment: Oct 12, 2005
Presentation of Credentials: Nov 8, 2005
Termination of Mission: January 1, 2008
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