| Lac-Matawin | |
| Flag Size: | 120x100px |
| Pushpin Map: | Canada Central Quebec |
| Pushpin Map Caption: | Location in central Quebec. |
| Coordinates: | 46.8167°N -92°W |
| Subdivision Type: | Country |
| Established Title1: | Constituted |
| Established Date1: | January 1, 1986 |
| Area Total Km2: | 793.80 |
| Area Land Km2: | 759.12 |
| Population Footnotes: | [1] |
| Population Total: | 10 |
| Population As Of: | 2021 |
| Population Density Km2: | 0.0 |
| Population Blank1 Title: | Pop 2016-2021 |
| Population Blank1: | 0.0% |
| Population Blank2 Title: | Dwellings |
| Population Blank2: | 53 |
| Utc Offset: | −5 |
| Utc Offset Dst: | −4 |
| Blank Name: | Highways |
| Blank Info: | No major routes |
Lac-Matawin is an unorganized territory in the Lanaudière region of Quebec, Canada, part of the Matawinie Regional County Municipality.