Knaplundsøya[1] is an island in Bodø Municipality in Nordland county, Norway.

The 6.6-square-kilometre (2.5 sq mi) island lies just southeast of the town of Bodø, between the Saltfjorden and the Skjerstadfjorden.

The island is connected to the mainland and to the neighboring island of Straumøya by the Norwegian County Road 17.

The Saltstraumen strait and its famous maelstrom are located between Straumøya and Knaplundsøya.

This article about an island in Nordland is a stub.