Powell Lake is a lake in the northern Sunshine Coast region of British Columbia, Canada, adjacent to the city of Powell River, which sits on the low rise of land forming a natural dam between the lake and the Strait of Georgia. The lake flows to the ocean through Powell River and features Goat Island, a large mountainous island. It serves as a reservoir for a small hydroelectric generating station which was built to serve the city's paper mill, and also as a water supply for that paper mill.