The Frøya Tunnel is an undersea tunnel connecting the municipalities of Frøya and Hitra in Trøndelag county, Norway. The tunnel is located about 4 km south of the village of Sistranda on Frøya. The 5305 m long road tunnel reaches a depth of 164 m below sea level. It begins in the village of Hammarvika on the island of Frøya and travels south under the Frøyfjorden to the island of Dolmøya in Hitra municipality.