Rokosjøen is a lake in Løten Municipality (and a very small part crossing into Elverum Municipality) in Innlandet county, Norway.

There is a camping facility on the east end of the lake.

Oset Chapel is located beside the campground facility.

Rokoberget Church was dedicated to Saint Michael and mentioned in a papal letter from 1254.

This article related to a lake in Innlandet in Norway is a stub.