| Lac de Chalain | |
|---|---|
| Location | Fontenu, Jura department, Franche-Comté |
| Coordinates | 46°40′13.74″N 5°47′37.19″E / 46.6704833°N 5.7936639°ECoordinates: 46°40′13.74″N 5°47′37.19″E / 46.6704833°N 5.7936639°E |
| Type | Lake |
| Primary outflows | Ain River |
| Catchment area | 44 km2 (17 sq mi) |
| Basin countries | France |
| Max. length | 2,700 m (8,900 ft) |
| Surface area | 2.32 km2 (0.90 sq mi) |
| Average depth | 16.6 m (54 ft) |
| Max. depth | 39 m (128 ft) |
| Surface elevation | 486 m (1,594 ft) |
Lac de Chalain is a lake in the Jura department of France. It is located on the territory of the commune of Fontenu.