Lac de Sanetsch (also Lac de Sénin, German: Sanetsch See) is a reservoir below Sanetsch Pass in Valais, Switzerland.

Its surface area is 29 ha (72 acres).

The Sanetsch dam was built in 1965.

The gravity dam has a height of 42 metres (138 ft).

This article related to a lake in Valais is a stub.