Selbusjøen[2] is the 17th largest lake in Norway.

It is located in Trøndelag county, primarily in Selbu Municipality, although the western end of it lies in the neighboring Trondheim Municipality.

Selbusjøen is part of the Nea-Nidelv watershed, with the Nea River flowing into it on the eastern end and the Nidelva River flowing out the western end.

The deepest part of the lake reaches 206 m (676 ft) below the surface.

The villages of Selbustrand, Fossan, Tømra, Trøa, Innbygda, Mebonden, Vikvarvet, and Sjøbygda are located on the shores around the lake.