Finnvollvatnet is a lake in the municipality of Namsos in Trøndelag county, Norway. The 2.97-square-kilometre (1.15 sq mi) lake lies in the western part of the municipality, southwest of the village of Sverkmoen, and only about 3 kilometres (1.9 mi) from the border with the neighboring municipality of Osen. The lake flows out into the Sverka river which eventually ends up in the Namsenfjorden.

• List of lakes in Norway