| Saint-Alphonse | |
| Flag Size: | 120x80px |
| Pushpin Map: | Canada Eastern Quebec |
| Pushpin Map Caption: | Location in eastern Quebec. |
| Coordinates: | 48.1833°N -103°W |
| Subdivision Type: | Country |
| Established Title: | Settled |
| Established Date: | 1890s |
| Established Title1: | Constituted |
| Established Date1: | May 9, 1902 |
| Government Footnotes: | [1] |
| Leader Title: | Mayor |
| Leader Name: | Gérard Porlier |
| Area Footnotes: | [2] |
| Area Total Km2: | 112.00 |
| Area Land Km2: | 112.09 |
| Area Note: | There is an apparent contradiction between two authoritative sources |
| Population Footnotes: | [3] |
| Population Total: | 711 |
| Population As Of: | 2021 |
| Population Density Km2: | 6.3 |
| Population Blank1 Title: | Pop 2016-2021 |
| Population Blank1: | 1.7% |
| Population Blank2 Title: | Dwellings |
| Population Blank2: | 325 |
| Utc Offset: | −5 |
| Utc Offset Dst: | −4 |
Saint-Alphonse is a municipality in Quebec, Canada.