| Saint-Didace | |
| Flag Size: | 120x100px |
| Pushpin Map: | Canada Central Quebec |
| Pushpin Map Caption: | Location in central Quebec |
| Coordinates: | 46.3333°N -90°W |
| Subdivision Type: | Country |
| Established Title: | Settled |
| Established Date: | 1820 |
| Established Title1: | Constituted |
| Established Date1: | August 27, 1863 |
| Leader Title: | Mayor |
| Leader Name: | Yves Germain |
| Area Total Km2: | 102.90 |
| Area Land Km2: | 99.60 |
| Population Footnotes: | [1] |
| Population Total: | 688 |
| Population As Of: | 2021 |
| Population Density Km2: | 6.9 |
| Population Blank1 Title: | Pop 2016-2021 |
| Population Blank1: | 5.5% |
| Population Blank2 Title: | Dwellings |
| Population Blank2: | 523 |
| Utc Offset: | −5 |
| Utc Offset Dst: | −4 |
| Blank Name: | Highways |
| Blank Info: | |
Saint-Didace is a parish municipality in the D'Autray Regional County Municipality in the Lanaudière region of Quebec, Canada.
In the 2021 Census of Population conducted by Statistics Canada, Saint-Didace had a population of living in of its total private dwellings, a change of from its 2016 population of . With a land area of 99.6km2, it had a population density of in 2021.[2]
Mother tongue:
Commission scolaire des Samares operates Francophone schools: