Frei is an island in Kristiansund Municipality in Møre og Romsdal county, Norway.

The 63.1-square-kilometre (24.4 sq mi) island lies south of the town of Kristiansund in the Nordmøre region of the county.

The main villages on the island include Rensvik in the north, Kvalvåg in the east, and Nedre Frei in the south.

The island is covered with mountains, pine forests, marshes, and sparse other vegetation.

The Freifjord Tunnel connects Frei to the island of Bergsøya (to the south) and the Omsund Bridge connects Frei to the island of Nordlandet (to the north).