Lac de la Ganguise (also known as Retenue de l'Estrade) is a lake in Aude, France. Its surface area is 2.78 km².

Lac de la Ganguise
Lac de la Ganguise is located in France
Lac de la Ganguise
Lac de la Ganguise
LocationAude
Coordinates43°19′10″N 1°48′20″E / 43.31944°N 1.80556°E / 43.31944; 1.80556
Typereservoir
Primary inflowsGanguise
Primary outflowsHers-Mort
Basin countriesFrance
Surface area2.78 km2 (1.07 sq mi)
Water volume44 hm3 (36,000 acre⋅ft)
Surface elevation228 m (748 ft)

It lies in the communes of Baraigne, Cumiès, Gourvieille, Belflou and Molleville.