Lac de Joux

Lac de Joux
View from the eastern shore
Location	Vallée de Joux, Vaud, Switzerland
Coordinates	46°38′16″N 6°17′4″E / 46.63778°N 6.28444°E / 46.63778; 6.28444Coordinates: 46°38′16″N 6°17′4″E / 46.63778°N 6.28444°E / 46.63778; 6.28444
Primary inflows	Orbe
Primary outflows	(Orbe)
Basin countries	Switzerland, France
Max. length	9 km (5.6 mi)
Max. width	1 km (0.62 mi)
Surface area	8.77 km2 (3.39 sq mi)
Max. depth	32 m (105 ft)
Surface elevation	1,004 m (3,294 ft)
Settlements	Le Chenit, L'Abbaye, Le Pont

Lac de Joux is a lake in the Vallée de Joux in the Canton of Vaud, Switzerland. With a surface area of 9.5 km², it is the largest lake in Switzerland lying above 1,000 metres. Lac de Joux is located in the Jura Mountains.