Otterøya[1] is an island in Namsos Municipality in Trøndelag county, Norway.

Otterøya sits just to the northwest of the town of Namsos on the north side of the Namsenfjorden.

It is connected to the mainland by the Lokkaren Bridge.

Otterøy Church is located on the island.

This article about an island in Trøndelag is a stub.