State of Residency: Delaware
Title: Minister Plenipotentiary
Appointment: Jan 27, 1823
Presentation of Credentials: Dec 27, 1823
Termination of Mission: Died at post, Jun 10, 1824
Note: Commissioned as Minister Plenipotentiary at Buenos Aires.
Name: John M. Forbes
State of Residency: Massachusetts
Title: Charg? d'Affaires
Appointment: Mar 9, 1825
Presentation of Credentials: [Aug 20, 1825]
Termination of Mission: Died at post, Jun 14, 1831
Note: Commissioned as Charg? d'Affaires near the Government of Buenos Aires. Formally recognized on this date.
Name: Francis Baylies
State of Residency: Massachusetts
Title: Charg? d'Affaires
Appointment: Jan 3, 1832
Presentation of Credentials: Jun 15, 1832
Termination of Mission: Left post, Sep 26, 1832
Note: Commissioned to the Republic of Buenos Aires.
Name: Richard Pollard
State of Residency: Virginia
Title: Charg? d'Affaires
Note: Not commissioned; nomination (which had been submitted by error) withdrawn before the Senate acted upon it.
Name: H. M. Watterson
State of Residency: Tennessee
Title: Charg? d'Affaires
Note: Not commissioned; nomination rejected by the Senate.
Name: William Brent, Jr.
State of Residency: District of Columbia
Title:. Charg? d'Affaires
Appointment: Jun 14, 1844
Presentation of Credentials: Nov 15, 1844
Termination of Mission: Presented recall, Jul 7, 1846
Note: Commissioned to the Republic of Buenos Aires.
Name: William A. Harris
State of Residency: Virginia
Title: Charg? d'Affaires
Appointment: Feb 19, 1846
Presentation of Credentials: Jul 7, 1846
Termination of Mission: Probably presented recall before Sep 12, 1851
Note: Commissioned to the Argentine Confederation.
Name: John S. Pendleton
State of Residency: Virginia
Title: Charg? d'Affaires
Appointment: Feb 27, 1851
Presentation of Credentials: Sep 12, 1851 or soon thereafter
Termination of Mission: Relinquished charge from Montevideo, Uruguay, as of Mar 31, 1854.
Note: Commissioned to the Argentine Republic.
Name: William H. Bissell
State of Residency: Illinois
Title: Charg? d'Affaires
Appointment: May 24, 1853
Note: Commissioned near the Government of Buenos Aires.
Commissioned during a recess of the Senate; declined appointment.
Name: James A. Peden
State of Residency: Florida
Title: Minister Resident
Appointment: Jun 29, 1854
Presentation of Credentials: Jan 22, 1855
Termination of Mission: Left Buenos Aires about May 1, 1857
Note: Commissioned on May 22, 1854, as Charg? d'Affaires to the Republic of Buenos Aires, but did not proceed to post in this capacity. Nominated Feb 25, 1856, to be Envoy Extraordinary and Minister Plenipotentiary to the Argentine Confederation; nomination withdrawn before the Senate acted upon it. The dates given on the second line [see entry below] are for Peden's service as Minister Resident to the Republic of Buenos Aires; those in brackets on the third line relate to his service as Minister Resident to the Argentine Confederation, with its capital at Parana. Although Peden was not commissioned as Minister Resident to the Argentine Confederation until 1856, he had been given letters of credence dated Jul 1, 1854 to both Buenos Aires and the Confederation and had presented his credentials at Parana before proceeding to Buenos Aires. Peden resided at Buenos Aires until about May 1, 1857, when he closed the Legation at that city and moved to Parana, where the U.S. Legation to the Argentine Confederation remained established until Palmer returned it to Buenos Aires, Feb 25, 1862, following reunification of the country.
Name: James A. Peden
State of Residency: Florida
Title: Minister Resident
Appointment: Jun 25, 1856
Presentation of Credentials: [Dec 1, 1854]
Termination of Mission: [Presented recall, Dec 1, 1858]
Name: Mirabeau B. Lamar
State of Residency: Texas
Minister Resident
Appointment: Jul 23, 1857
Note: Commissioned to the Argentine Confederation.
Commissioned during a recess of the senate; did not serve under this appointment.
Name: Benjamin C. Yancey
State of Residency: Georgia
Title: Minister Resident
Appointment: Jun 14, 1858
Presentation of Credentials: Dec 1, 1858
Termination of Mission: Transmitted recall by note from Montevideo, Uruguay, Sep 30, 1859
Note: Commissioned to the Argentine Confederation.
Name: John F. Cushman
State of Residency: Mississippi
Title: Minister Resident
Appointment: Jul 18, 1859
Presentation of Credentials: Dec 22, 1859
Termination of Mission: Relinquished charge Feb 17, 1861
Note: Commissioned to the Argentine Confederation. Commissioned during a recess of the Senate; recommissioned after confirmation on Jan 24, 1860.
Name: Robert M. Palmer
State of Residency: Pennsylvania
Title: Minister Resident
Appointment: Mar 28, 1861
Presentation of Credentials: Oct 5, 1861
Termination of Mission: Left post about Apr 12, 1862
Note: Commissioned to the Argentine Confederation.
Name: Robert C. Kirk
State of Residency: Ohio
Title: Minister Resident
Appointment: Mar 4, 1862
Presentation of Credentials: Jun 21, 1862
Termination of Mission: Left post, Jul 26, 1866
Note: Commissioned to the Argentine Confederation.
Name: Alexander Asboth
State of Residency: Missouri
Title: Minister Resident
Appointment: Mar 12, 1866
Presentation of Credentials: Oct 20, 1866
Termination of Mission: Died at post, Jan 21, 1868
Note: Commissioned to the Argentine Republic. Accredited also to Uruguay; resident at Buenos Aires.
Name: H. G. Worthington
State of Residency: Nevada
Title: Minister Resident
Appointment: Jun 5, 1868
Presentation of Credentials: Sep 11, 1868
Termination of Mission: Presented recall, Jul 8, 1869
Note: Commissioned to the Argentine Republic. Accredited also to Uruguay; resident at Buenos Aires.
Name: Robert C. Kirk
State of Residency: Ohio
Title: Minister Resident
Appointment: Apr 16, 1869
Presentation of Credentials: Jul 8, 1869
Termination of Mission: Presented recall, Nov 4, 1871
Note: Commissioned to the Argentine Republic. Accredited also to Uruguay; resident at Buenos Aires.
Name: C. W. LeGendre
Title: Minister Resident
Note: To be commissioned to the Argentine Republic.
Not commissioned; nomination not confirmed by the Senate.
Name: Julius White
State of Residency: Illinois
Title: Minister Resident
Appointment: Dec 12, 1872
Presentation of Credentials: May 6, 1873
Termination of Mission: Left post, Nov 14, 1873
Note: Commissioned to the Argentine Republic.
Commissioned during a recess of the Senate Jul 23, 1872; declined appointment.
Name: Thomas O. Osborn
State of Residency: Illinois
Title: Minister Resident
Appointment: Feb 10, 1874
Presentation of Credentials: May 21, 1874
Termination of Mission: Recommissioned as Minister Resident/Consul General
Note: Commissioned to the Argentine Republic.
Name: Thomas O. Osborn
State of Residency: Illinois
Title: Minister Resident/Consul General
Appointment: Jul 7, 1884
Termination of Mission: Probably presented recall on or before Oct 15, 1885
Note: Commissioned to the Argentine Republic.
Commissioned during a recess of the Senate; recommissioned after confirmation on Jul 7, 1884.
Name: Bayless W. Hanna
State of Residency: Indiana
Title: Minister Resident/Consul General
Appointment: Jun 17, 1885
Presentation of Credentials: Oct 15, 1885
Termination of Mission: Promoted to Envoy Extraordinary and Minister Plenipotentiary
Note: Commissioned to the Argentine Republic. Commissioned during a recess of the Senate; recommissioned after confirmation on Apr 28, 1886.
Name: Bayless W. Hanna
State of Residency: Indiana
Title: Envoy Extraordinary and Minister Plenipotentiary
Appointment: Jul 1, 1887
Presentation of Credentials: Feb 15, 1888
Termination of Mission: Left post, Jul 8, 1889
Note: Commissioned to the Argentine Republic. Commissioned during a recess of the Senate; recommissioned after confirmation on Dec 15, 1881.
Name: John R. G. Pitkin
State of Residency: Louisiana
Title: Envoy Extraordinary and Minister Plenipotentiary
Appointment: Jul 26, 1889
Presentation of Credentials: Oct 31, 1889
Termination of Mission: Left post, Aug 15, 1893
Note: Commissioned to the Argentine Republic. Commissioned during a recess of the Senate; recommissioned after confirmation on Jan 9, 1890.
Name: William I. Buchanan
State of Residency: Iowa
Title: Envoy Extraordinary and Minister Plenipotentiary
Appointment: Jan 26, 1894
Presentation of Credentials: May 19, 1894
Termination of Mission: Left post, Jul 11, 1899
Note: Commissioned to the Argentine Republic.
Name: William P. Lord
State of Residency: Oregon
Title: Envoy Extraordinary and Minister Plenipotentiary
Appointment: Oct 16, 1899
Presentation of Credentials: Feb 14, 1900
Termination of Mission: Left post, Mar 27, 1903
Note: Commissioned to the Argentine Republic.
Commissioned during a recess of the Senate; recommissioned after confirmation on Dec 14, 1899.
Name: John Barrett
State of Residency: Oregon
Title: Envoy Extraordinary and Minister Plenipotentiary
Appointment: Jul 2, 1903
Presentation of Credentials: Dec 21, 1903
Termination of Mission: Left post, Apr 27, 1904
Note: Commissioned to the Argentine Republic.
Commissioned during a recess of the Senate; recommissioned after confirmation Nov 16, 1903..
Name: Arthur M. Beaupre
State of Residency: Illinois
Title: Envoy Extraordinary and Minister Plenipotentiary
Appointment: Mar 17, 1904
Presentation of Credentials: Jun 17, 1904
Termination of Mission: Left post, May 2, 1908
Note: Commissioned to the Argentine Republic.
Name: Spencer F. Eddy
State of Residency: Illinois
Title: Envoy Extraordinary and Minister Plenipotentiary
Appointment: Apr 2, 1908
Presentation of Credentials: Aug 27, 1908
Termination of Mission: Left post, Jan 2, 1909
Note: Commissioned to the Argentine Republic.
Name: Huntington Wilson
State of Residency: Illinois
Title: Envoy Extraordinary and Minister Plenipotentiary
Appointment: Jan 11, 1909
Note: Took oath of office, but did not proceed to post.
Name: Charles H. Sherrill
State of Residency: New York
Title: Envoy Extraordinary and Minister Plenipotentiary
Appointment: Apr 1, 1909
Presentation of Credentials: Jun 30, 1909
Termination of Mission: Left post, Sep 16, 1910
Note: Commissioned to the Argentine Republic.
Name: John R. Carter
State of Residency: Maryland
Title: Envoy Extraordinary and Minister Plenipotentiary
Appointment: Aug 12, 1911
Note: Commissioned to the Argentine Republic.
Did not serve under this appointment.
Name: John W. Garrett
State of Residency: Maryland
Title: Envoy Extraordinary and Minister Plenipotentiary
Appointment: Dec 14, 1911
Presentation of Credentials: Feb 29, 1912
Termination of Mission: Left post, Nov 22, 1913
Name: Frederic Jesup Stimson
State of Residency: Massachusetts
Non-career appointee
Title: Ambassador Extraordinary and Plenipotentiary
Appointment: Oct 1, 1914
Presentation of Credentials: Jan 8, 1915
Termination of Mission: Left post, Apr 21, 1921
Name: John W. Riddle
State of Residency: Connecticut
Foreign Service officer
Title: Ambassador Extraordinary and Plenipotentiary
Appointment: Nov 18, 1921
Presentation of Credentials: Mar 8, 1922
Termination of Mission: Left post, May 28, 1925
Name: Peter Augustus Jay
State of Residency: Rhode Island
Foreign Service officer
Title: Ambassador Extraordinary and Plenipotentiary
Appointment: Mar 18, 1925
Presentation of Credentials: Sep 24, 1925
Termination of Mission: Left post, Dec 30, 1926
Name: Robert Woods Bliss
State of Residency: New York
Foreign Service officer
Title: Ambassador Extraordinary and Plenipotentiary
Appointment: Feb 17, 1927
Presentation of Credentials: Sep 9, 1927
Termination of Mission: Left post, Apr 29, 1933
Name: Alexander W. Weddell
State of Residency: Virginia
Foreign Service officer
Title: Ambassador Extraordinary and Plenipotentiary
Appointment: Jun 3, 1933
Presentation of Credentials: Sep 18, 1933
Termination of Mission: Left post, Oct 29, 1938
Name: Norman Armour
State of Residency: New Jersey
Foreign Service officer
Title: Ambassador Extraordinary and Plenipotentiary
Appointment: May 18, 1939
Presentation of Credentials: Jun 19, 1939
Termination of Mission: Normal relations interrupted Feb 24, 1944; new Government of Argentina still unrecognized by the United States when Armour left post, Jun 29, 1944
Name: Spruille Braden
State of Residency: New York
Non-career appointee
Title: Ambassador Extraordinary and Plenipotentiary
Appointment: May 8, 1945
Presentation of Credentials: May 21, 1945
Termination of Mission: Left post, Sep 23, 1945
Name: George S. Messersmith
State of Residency: Delaware
Foreign Service officer
Title: Ambassador Extraordinary and Plenipotentiary
Appointment: Apr 12, 1946
Presentation of Credentials: May 23, 1946
Termination of Mission: Left post, Jun 12, 1947
Name: James Bruce
State of Residency: Maryland
Non-career appointee
Title: Ambassador Extraordinary and Plenipotentiary
Appointment: Jul 12, 1947
Presentation of Credentials: Aug 21, 1947
Termination of Mission: Left post, Aug 20, 1949
Name: Stanton Griffis
State of Residency: Connecticut
Non-career appointee
Title: Ambassador Extraordinary and Plenipotentiary
Appointment: Sep 22, 1949
Presentation of Credentials: Nov 17, 1949
Termination of Mission: Left post, Sep 23, 1950
Name: Ellsworth Bunker
State of Residency: New York
Non-career appointee
Title: Ambassador Extraordinary and Plenipotentiary
Appointment: Mar 13, 1951
Presentation of Credentials: May 8, 1951
Termination of Mission: Left post, Mar 12, 1952
Name: Albert F. Nufer
State of Residency: New York
Foreign Service officer
Title: Ambassador Extraordinary and Plenipotentiary
Appointment: May 29, 1952
Presentation of Credentials: Aug 14, 1952
Termination of Mission: Left post, May 12, 1956
Name: Willard L. Beaulac
State of Residency: Rhode Island
Foreign Service officer
Title: Ambassador Extraordinary and Plenipotentiary
Appointment: May 10, 1956
Presentation of Credentials: Jun 1, 1956
Termination of Mission: Left post, Aug 2, 1960
Note: Nominated Jul 17, 1953 to be Ambassador Extraordinary and Plenipotentiary to Argentina; nomination withdrawn before the Senate acted upon it; renominated in 1956.
Name: Roy Richard Rubottom, Jr.
State of Residency: Texas
Foreign Service officer
Title: Ambassador Extraordinary and Plenipotentiary
Appointment: Aug 27, 1960
Presentation of Credentials: Oct 20, 1960
Termination of Mission: Left post, Oct 19, 1961
Note: Commissioned during a recess of the Senate Jul 29, 1960; declined appointment.
Name: Robert McClintock
State of Residency: California
Foreign Service officer
Title: Ambassador Extraordinary and Plenipotentiary
Appointment: Feb 6, 1962
Presentation of Credentials: Feb 14, 1962
Termination of Mission: Left post, May 10, 1964
Name: Edwin M. Martin
State of Residency: Ohio
Foreign Service officer
Title: Ambassador Extraordinary and Plenipotentiary
Appointment: Jan 29, 1964
Presentation of Credentials: Jun 11, 1964
Termination of Mission: Left post, Jan 5, 1968
Name: Carter L. Burgess
State of Residency: New York
Non-career appointee
Title: Ambassador Extraordinary and Plenipotentiary
Appointment: Jul 24, 1968
Presentation of Credentials: Aug 21, 1968
Termination of Mission: Left post, Mar 14, 1969
Name: John Davis Lodge
State of Residency: Connecticut
Non-career appointee
Title: Ambassador Extraordinary and Plenipotentiary
Appointment: May 27, 1969
Presentation of Credentials: Jul 23, 1969
Termination of Mission: Left post, Nov 10, 1973
Name: Robert C. Hill
State of Residency: New Hampshire
Non-career appointee
Title: Ambassador Extraordinary and Plenipotentiary
Appointment: Dec 19, 1973
Presentation of Credentials: Feb 15, 1974
Termination of Mission: Left post, May 10, 1977
Name: Raul H. Castro
State of Residency: Arizona
Non-career appointee
Title: Ambassador Extraordinary and Plenipotentiary
Appointment: Sep 15, 1977
Presentation of Credentials: Nov 16, 1977
Termination of Mission: Left post, Jul 30, 1980
Name: Harry W. Shlaudeman
State of Residency: California
Foreign Service officer
Title: Ambassador Extraordinary and Plenipotentiary
Appointment: Oct 2, 1980
Presentation of Credentials: Nov 4, 1980
Termination of Mission: Left post, Aug 26, 1983
Name: Frank V. Ortiz
State of Residency: New Mexico
Non-career appointee
Title: Ambassador Extraordinary and Plenipotentiary
Appointment: Nov 18, 1983
Presentation of Credentials: Nov 29, 1983
Termination of Mission: Left post, Aug 29, 1986
Name: Theodore E. Gildred
State of Residency: California
Non-career appointee
Title: Ambassador Extraordinary and Plenipotentiary
Appointment: Oct 16, 1986
Presentation of Credentials: Nov 6, 1986
Termination of Mission: Left post, May 31, 1989
Name: Terence A. Todman
State of Residency: Virgin Islands
Foreign Service officer
Title: Ambassador Extraordinary and Plenipotentiary
Appointment: Apr 20, 1989
Presentation of Credentials: Jun 13, 1989
Termination of Mission: Left post, Jun 28, 1993
Name: William Graham Walker
State of Residency: Maryland
Foreign Service officer
Title: Ambassador Extraordinary and Plenipotentiary
Note: Nomination of May 12, 1992, was not acted upon by the Senate.
Name: James Richard Cheek
State of Residency: Arkansas
Foreign Service officer
Title: Ambassador Extraordinary and Plenipotentiary
Appointment: May 28, 1993
Presentation of Credentials: Jul 19, 1993
Termination of Mission: Left post, Dec 18, 1996
Note: Ronald D. Godard served as Charg? d'Affaires ad interim, Dec 1996- .
Name: Hassan Nemazee
State of Residency: New York
Non-career appointee
Title: Ambassador Extraordinary and Plenipotentiary
Appointment: Jan 6, 1999
Note: Nomination returned without confirmation Aug 5, 1999.
Name: James Donald Walsh
State of Residency: Pennsylvania
Foreign Service officer
Title: Ambassador Extraordinary and Plenipotentiary
Appointment: Jun 14, 2000
Presentation of Credentials: Jul 3, 2000
Termination of Mission: Left post May 21, 2003
Name: Lino Gutierrez
State of Residency: Florida
Foreign Service officer
Title: Ambassador Extraordinary and Plenipotentiary
Appointment: Apr 16, 2003
Presentation of Credentials: Oct 15, 2003
Termination of Mission: Left post, April 8, 2006
Name: Earl Anthony Wayne
State of Residency: Maryland
Foreign Service officer
Title: Ambassador Extraordinary and Plenipotentiary
Appointment: August 1, 2006
Presentation of Credentials: January 19, 2007
Termination of Mission:
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