Gjerdøya[1] is an island in Rødøy Municipality in Nordland county, Norway.

The main village on the island is called Gjerøy.

The 9.3-square-kilometre (3.6 sq mi) island has a population (2016) of 87 people.

There is regular ferry service to Gjerdøya from the mainland and to the islands surrounding it.

This article about an island in Nordland is a stub.