Vibrandsøy or Vibrandsøya is an island in Haugesund municipality in Rogaland county, Norway. The island lies west of the densely built-up island of Hasseløy and northwest of the island of Risøy in the town of Haugesund. The island is now used as a recreational area. The island was part of the Torvastad municipality until 1965, and is the only part of the former municipality which was not incorporated into Karmøy.