| Honorio Pueyrredón | |
| Office: | Ambassador of Argentina in the United States |
| Term Start: | 10 March 1924 |
| Term End: | 1928 |
| Predecessor: | Tomas Le Breton |
| Successor: | Manuel Malbrán |
| President: | Marcelo T. de Alvear |
| Office2: | Minister of Foreign Affairs and Worship |
| Term Start2: | 30 January 1917 |
| Term End2: | 12 October 1922 |
| President2: | Hipólito Yrigoyen |
| Predecessor2: | Carlos A. Becú |
| Successor2: | Ángel Gallardo |
| Office3: | Minister of Agriculture of Argentina |
| Term Start3: | 12 October 1916 |
| Term End3: | 13 September 1917 |
| President3: | Hipólito Yrigoyen |
| Predecessor3: | Horacio Calderón |
| Successor3: | Alfredo Demarchi |
| Birth Name: | Honorio Pueyrredón |
| Birth Date: | 9 July 1876 |
| Birth Place: | San Pedro, Buenos Aires, Argentina |
| Death Place: | Buenos Aires |
| Education: | University of Buenos Aires |
| Profession: | Lawyer, diplomat, politician and footballer |
| Party: | Radical Civic Union |
| Otherparty: | National Civic Union |
Honorio Pueyrredón (June 9, 1876 – September 23, 1945) was an Argentine lawyer, university professor, diplomat and politician.
Born in San Pedro, Buenos Aires, Pueyrredón graduated at the Faculty of Law of the University of Buenos Aires in 1896, where he would also later teach.
Originally affiliated to the National Civic Union, he later became a prominent figure in the Radical Civic Union, and was named Minister of Agriculture in 1916 by President Hipólito Yrigoyen, and was Minister of Foreign Affairs between 1917 and 1922. During this last term Pueyrredón was also chief of the Argentine delegation at the first gathering of the League of Nations in Geneva, where he served as vice-president of the first assembly of 1920.[1]
In 1922 Pueyrredón was named Argentine Ambassador to the United States, a post he also held in Cuba years later. He was also president of the Argentine delegation to the XI Pan-American Conference held in Havana in 1928.
Pueyrredón was elected governor of the Province of Buenos Aires in 1930, but the elections were invalidated by dictator José Félix Uriburu, whose coup d'etat toppled Yrigoyen. He continued his political activity, firmly following Yrigoyen ideas, until he was exiled during the Década Infame because of his political tendencies. He returned to Argentina several years later, and died in Buenos Aires in 1945.