Mesøya[1] is an island in Meløy Municipality in Nordland county, Norway.

The island sits at the mouth of the Glomfjorden.

Mesøya is only accessible by boat, and it has no regular ferry service.

Mesøya has an area of 8 square kilometres (3.1 sq mi) and the highest point on the island is the 364-metre (1,194 ft) tall Mesøytoppen.

This article about an island in Nordland is a stub.