Bømlo is also the name of the main island of this archipelago, consisting of about 900 islets, located west of Stord. It is connected to Stord by bridges, which has made entrance to and departure from the island easier and more effective.
Siggjo is the highest mountain on Bømlo. The rocks on Siggjo contains large amounts of the igneous rock rhyolite, which was used in the Stone Age to create armament and tools.
Wärtsilä, Eidesvik Offshore, Brandasund fiskeforedling and Bremnes Seashore are notable industries, all of which are active in industries somehow related to the ocean. This, as well as tourism and agriculture, constitutes the main industries of Bømlo.