| Lac de la Ganguise | |
| Location: | Aude |
| Pushpin Map: | France |
| Coords: | 43.3194°N 1.8056°W |
| Type: | reservoir |
| Inflow: | Ganguise |
| Outflow: | Hers-Mort |
| Basin Countries: | France |
| Area: | 2.78km2 |
| Volume: | 44hm3 |
| Elevation: | 228m (748feet) |
Lac de la Ganguise (also known as Retenue de l'Estrade) is a lake in Aude, France. Its surface area is 2.78 km².
It lies in the communes of Baraigne, Cumiès, Gourvieille, Belflou and Molleville.