Karmsund is a strait located in Rogaland county, Norway. The long strait divides the island of Karmøy on the west and the mainland of Norway and island of Vestre Bokn in the east. The strait runs through the municipalities of Haugesund, Karmøy, and Bokn. The town of Haugesund lies at the northern end of the strait and the town of Kopervik lies in the central part of the strait, and the village of Skudeneshavn lies near the southern end where the strait flows into the Boknafjorden. The Karmsund Bridge, a part of the European route E134 highway, links Karmøy to the mainland. The bridge was completed in 1955. The small islands of Vibrandsøy, Risøy, and Hasseløy lie in the strait at the northern end, just off shore from the town of Haugesund.

Karmsund is a strait located in Rogaland county, Norway. The long strait divides the island of Karmøy on the west and the mainland of Norway and island of Vestre Bokn in the east. The strait runs through the municipalities of Haugesund, Karmøy, and Bokn. The town of Haugesund lies at the northern end of the strait and the town of Kopervik lies in the central part of the strait, and the village of Skudeneshavn lies near the southern end where the strait flows into the Boknafjorden. The Karmsund Bridge, a part of the European route E134 highway, links Karmøy to the mainland. The bridge was completed in 1955. The small islands of Vibrandsøy, Risøy, and Hasseløy lie in the strait at the northern end, just off shore from the town of Haugesund.