Lågen is a Norwegian word meaning "the river". It may refer to:
Places Gudbrandsdalslågen, a river running through the Gudbrandsdalen valley in Innlandet county in Norway Numedalslågen, a river running through the Numedalen valley in Vestland, Buskerud, and Vestfold counties in Norway Suldalslågen, a river running through the Suldalen valley in Rogaland county in Norway