Gjesåssjøen is a lake in Åsnes Municipality in Innlandet county, Norway.

The 4.06-square-kilometre (1.57 sq mi) lake lies about 5 kilometres (3.1 mi) northwest of the villages of Kjellmyra and Flisa and about 6 kilometres (3.7 mi) northeast of the village of Flisa.

[2] The lake was designated as a nature reserve in 2003.

Gjesåssjøen is an important habitat for a number of bird species.

This Innlandet location article is a stub.