Øyangen is a lake in Innlandet county, Norway. The 6.644-square-kilometre (2.565 sq mi) lake lies on the border of the municipalities of Øystre Slidre, Vestre Slidre, and Vang. The lake lies about 5 kilometres (3.1 mi) to the south of the village of Beitostølen and about 5 kilometres (3.1 mi) to the northwest of the village of Skammestein. The lake is regulated for hydroelectric power generation. It serves as a reservoir for the nearby Lomen power plant.

• List of lakes in Norway