| Alfredo Oscar Saint-Jean | |
| Nationality: | Argentine |
| Office: | Interim President of Argentina |
| Term Start: | 18 June 1982 |
| Term End: | 1 July 1982 |
| Appointer: | Military junta |
| Vicepresident: | None |
| Predecessor: | Leopoldo Galtieri |
| Successor: | Reynaldo Bignone |
| Birth Date: | 11 November 1926 |
| Birth Place: | Chascomús, Buenos Aires |
| Death Place: | Chascomús, Buenos Aires |
| Spouse: | María Beatriz Dauna |
| Profession: | Military |
| Allegiance: |  Argentina |
| Serviceyears: | 1944–1982 |
| Rank: | (Pre-1991 epaulette) Division General |
| Battles: | Dirty War |
| Signature: | FirmaSaint-Jean.jpg |
Alfredo Oscar Saint-Jean (pronounced as /es/; 11 November 1926 – 2 September 1987) was an Argentine Army division general and politician, who served as President of Argentina in 1982.[1]
Following the 1976 coup and the intervention of the Argentine military in public affairs during the National Reorganization Process, Alfredo Saint-Jean was one of the generals who held senior roles. He served as interior minister from 1981, having been appointed by General Leopoldo Galtieri.
He briefly served as President of Argentina from 18 June 1982 to 1 July 1982, during a period of military rule, after Galtieri was ousted from office owing to the country's defeat in the Falklands War.
Saint-Jean's brief period as president in June and July 1982 ended when he was succeeded by General Reynaldo Bignone.