Rødungen is a lake in Buskerud County, Norway. The lake is located on the border between the municipalities of Ål and Nore og Uvdal. Waterfall from the lake is a power source for Usta kraftverk, a hydro-electric plant. The power station exploits the fall of the Usta River from Rødungen as well as Ustevatn. The plant started production in 1965 and is owned and operated by E- CO Energi.