| Lac-Pythonga | |
| Flag Size: | 120x100px |
| Pushpin Map: | Canada Western Quebec |
| Pushpin Label Position: | left |
| Pushpin Map Caption: | Location in western Quebec. |
| Coordinates: | 46.3833°N -102°W |
| Subdivision Type: | Country |
| Subdivision Name: | Canada |
| Established Title1: | Constituted |
| Established Date1: | January 1, 1986 |
| Area Footnotes: | [1] [2] |
| Area Total Km2: | 5934.70 |
| Area Land Km2: | 5129.62 |
| Population Total: | 0 |
| Population As Of: | 2011 |
| Population Density Km2: | 0.0 |
| Population Blank1 Title: | Pop (2006–11) |
| Population Blank1: | N/A |
| Population Blank2 Title: | Dwellings |
| Population Blank2: | 15 |
| Utc Offset: | −05:00 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | −04:00 |
Lac-Pythonga is an unorganized territory in the Outaouais region of Quebec, Canada. It surrounds Lake Pythonga and is the largest of the five unorganized territories in the La Vallée-de-la-Gatineau Regional County Municipality.
The Rapid Lake First Nation reserve, located on the western shore of Cabonga Reservoir, is an enclave within this territory.
Population trend: