Lac de Cleuson is a reservoir in the municipality of Nendaz, Valais, Switzerland. Its surface area is 0.51 km (0.20 sq mi). Water from the reservoir is often pumped into the Grande Dixence Dam's reservoir, Lac des Dix, for use in hydroelectricity production.

• List of lakes of Switzerland
• List of mountain lakes of Switzerland

• Media related to Lac de Cleuson at Wikimedia Commons
• Swiss Committee on Dams, Lac de Cleuson - https://web.archive.org/web/20100715210229/http://www.swissdams.ch/dams/damForm/default_e.asp?ID=31
• Walk from Siviez to the dam of Lac de Cleuson - http://myswitzerland.flaggy.ch/nendaz/eng/cleuson-e.htm