Ertvågsøya is an island in the municipality of Aure in Møre og Romsdal county, Norway.

The island has an area of 139.7 square kilometres (53.9 sq mi) and the highest point is the 694-metre (2,277 ft) tall Korsbekkfjellet.

The Arasvikfjorden strait runs along the south side of the island and the Gjerdevika, an arm of the Edøyfjorden passes along the north side of the island.

The island is nearly bisected by the Foldfjorden, a narrow bay reaching 7 kilometres (4.3 mi) south into the central part of the island.

This article about an island in Møre og Romsdal is a stub.