| Honorific Prefix: | His Excellency |
| Archbishop of Ottawa | |
| Church: | Roman Catholic |
| Archdiocese: | Ottawa |
| Enthroned: | 1940 |
| Ended: | 1953 |
| Predecessor: | Joseph-Guillaume-Laurent Forbes |
| Successor: | Marie-Joseph Lemieux |
| Birth Date: | August 16, 1885 |
| Birth Place: | Saint-Raymond, Quebec |
| Death Date: | March 30, 1953 |
| Death Place: | Ottawa, Ontario |
Alexandre Vachon (August 16, 1885 – March 30, 1953) was a Canadian Roman Catholic priest who served as the Archbishop of Ottawa and the chancellor of the University of Ottawa from 1940 to 1953.[1] [2]