Valderøya is an island off the west coast of Norway. It is part of Giske Municipality in Møre og Romsdal county. The island is connected to the city of Ålesund to the south via the Valderøy Tunnel to the island of Ellingsøy and then by the Ellingsøy Tunnel to Ålesund. Valderøya is also connected to the island Vigra to the north by a short bridge.