Lac de Tseuzier
View of Lac de Tseuzier with the Weisshorn range in the background
Lac de Tseuzier Show map of Canton of Valais Lac de Tseuzier Show map of Canton of Bern Lac de Tseuzier Show map of Piedmont Lac de Tseuzier Show map of Switzerland Lac de Tseuzier Show map of Italy Lac de Tseuzier Show map of Alps
Location	Valais
Coordinates	46°21′3″N 7°25′50″E / 46.35083°N 7.43056°E / 46.35083; 7.43056
Type	reservoir
Primary outflows	La Liène
Catchment area	18.7 km2 (7.2 sq mi)
Basin countries	Switzerland
Surface area	0.85 km2 (0.33 sq mi)
Max. depth	140 m (460 ft)
Water volume	51 million cubic metres (41,000 acre⋅ft)
Surface elevation	1,777 m (5,830 ft)

Lac de Tseuzier is an artificial lake in the canton of Valais, Switzerland. It is located in the municipalities of Ayent and Icogne. The reservoir has a volume of 51 mio m³ and a surface area of 0.85 km² (0.33 sq mi). It was formed by the dams of Zeuzier (156 m) and Proz-Riond (20 m) built in 1957.