Bjarkøya is an island in Harstad Municipality in Troms county, Norway.

[1] The Bjarkøy Tunnel connects the village of Austnes on the southeastern tip of the island to the northeastern tip of the neighboring island of Grytøya.

This tunnel is part of the Bjarkøy Fixed Link project that also has a bridge between the islands of Grytøya to Sandsøya.

[2] The highest point on the island is the 248-metre (814 ft) tall mountain Falkeberget.

The administrative centre of Bjarkøy Municipality was the village of Nergården, located on the island.