| Joseph-Léon Saint-Jacques | |
| Office: | Member of the Legislative Assembly of Quebec for Argenteuil |
| Predecessor: | John Hay |
| Term Start: | 1925 |
| Term End: | 1927 |
| Birth Date: | 13 July 1877 |
| Birth Place: | Saint-Hermas (Mirabel), Quebec |
| Death Place: | Montreal, Quebec |
| Resting Place: | Notre Dame des Neiges Cemetery |
| Party: | Conservative |
Joseph-Léon Saint-Jacques (July 13, 1877 - September 24, 1964) was a Canadian provincial politician. He was the Conservative member of the Legislative Assembly of Quebec for Argenteuil from 1925 to 1927.