| Lake Waswanipi | |
|---|---|
 Watershed of Nottaway River | |
  Lake Waswanipi | |
| Location | Baie-James, Quebec |
| Coordinates | 49°33′07″N 76°27′00″W / 49.55194°N 76.45000°W |
| Type | Natural |
| Primary inflows | Waswanipi River, O'Sullivan River, Bachelor River, Taylor creek, Ailly creek |
| Primary outflows | Waswanipi River |
| Basin countries | Canada |
| Max. length | 39.4 kilometres (24.5 mi) |
| Max. width | 13.4 kilometres (8.3 mi) |
| Surface area | 184.79 kilometres (114.82 mi) |
| Surface elevation | 267 metres (876 ft) |
Lake Waswanipi is a lake located in municipality of Eeyou Istchee Baie-James (municipalité), in administrative region of Nord-du-Québec, in Quebec, in Canada.
Waswanipi Lake extends into the townships of Bergères, Bossé, Nelligan, Bellin and Ailly.
Forestry is the main economic activity of the sector. Recreational tourism activities come second.
The hydrographic slope of Waswanipi Lake is accessible via the James Bay Road from the Southwest (Matagami), then branches northwards by cutting the Canet River, located at Northwest of Goéland Lake. Forest roads serve the southern part of the lake. The Canadian National railway linking Matagami to Chibougamau passes from the south side of the lake on the strip of land between Pusticamica Lake and Waswanipi Lake.
The surface of Waswanipi Lake is usually frozen from early November to mid-May, however, safe ice circulation is generally from mid-November to mid-April.