Ytter-Vikna[1] is one of the three major islands in Nærøysund Municipality in Trøndelag county, Norway.

It is located in the western part of the municipality.

Norwegian County Road 770 crosses the 82-square-kilometre (32 sq mi) island.

The villages of Austafjord and Valøya are located on this island.

This article about an island in Trøndelag is a stub.