Ulstein is a municipality in Møre og Romsdal county, Norway. It is part of the Sunnmøre region. The commercial and administrative centre of Ulstein is the town of Ulsteinvik. The municipality occupies the western half of the island of Hareidlandet, as well as about 30 smaller islands, four of which are populated. Ulstein is connected to the mainland of Norway by the Eiksund Bridge (to the island of Eika) and then the Eiksund Tunnel to the neighboring municipality of Ørsta. The Grasøyane Lighthouse is located on a small island in the northwestern part of Ulstein Municipality.