Lake Stratos () is an artificial lake near Stratos in Aetolia-Acarnania, western Greece. The lake is fed and drained by the river Acheloos. It was formed by the Stratos Dam, completed in 1989. Its maximum capacity is 80,000,000 mó of water. Its area is 7.4 km<sup>2</sup>. It is used for the generation of hydroelectric power.