| Lac-Oscar | |
| Flag Size: | 120x100px |
| Pushpin Map: | Canada Central Quebec |
| Pushpin Map Caption: | Location in central Quebec. |
| Coordinates: | 47.2833°N -87°W |
| Subdivision Type: | Country |
| Established Title1: | Constituted |
| Established Date1: | January 1, 1986 |
| Area Total Km2: | 1810.90 |
| Area Land Km2: | 1667.85 |
| Population Footnotes: | [1] |
| Population Total: | 0 |
| Population As Of: | 2021 |
| Population Density Km2: | 0.0 |
| Population Blank1 Title: | Pop 2016-2021 |
| Population Blank1: | N/A |
| Population Blank2 Title: | Dwellings |
| Population Blank2: | 0 |
| Utc Offset: | −5 |
| Utc Offset Dst: | −4 |
| Blank Name: | Highways |
| Blank Info: | No major routes |
Lac-Oscar is an unorganized territory in the Laurentides region of Quebec, Canada, and one of eleven unorganized areas in the Antoine-Labelle Regional County Municipality. No permanent population resides in this territory.