Algrøyna or Algrøy is an island in Fjell municipality in Hordaland county, Norway. The 4.9-square-kilometre (1.9 sq mi) island lies just west of the large island of Sotra and north of the small island of Lokøyna. There are a series of bridges connecting it to the island of Sotra, which in turn is connected to the mainland. The highest point on the island is the 78-metre (256 ft) tall mountain Hillefjellet.