Hasseløy is an island in Haugesund municipality in Rogaland county, Norway. The 0.3-square-kilometre (74-acre) island lies north of the island Risøy, south of the peninsula Killingøy, and between Vibrandsøy to the west and the mainland to the east. It is part of the town of Haugesund, connected to the city centre by a bridge. The informal name Bakarøy is commonly used locally.