| Lac de Sanetsch | |
|---|---|
| Location | Gsteig, Valais |
| Lake type | reservoir |
| Catchment area | 10.7 km² |
| Basin countries | Switzerland |
| Surface area | 0.29 km² |
| Surface elevation | 2034 m |
Lac de Sanetsch (also Lac de Sénin, German: Sanetsch See) is a reservoir below Sanetsch Pass in Valais, Switzerland. Its surface area is 0.29 km². The Sanetsch dam was built in 1965. The gravity dam has a height of 42 m.