Seløyna or Seløy is an island in Øygarden municipality in Hordaland county, Norway. The island is the northernmost of the large populated islands in the Øygarden archipelago. It is connected to the island of Alvøyna by a short bridge over the Vikesundet strait. The small island of Førehjelmo lies just to the north of Seløyna, and there is a small bridge connecting to it.