Ærøya is an unpopulated island in Arendal municipality in Agder county, Norway. The 0.12-square-kilometre (30-acre) island lies along the Skaggerak coast about 700 metres (2,300 ft) south of the larger island of Hisøya. The islands of Havsøya and Merdø lie to the northeast, the islands of Store Torungen and Lille Torungen lie to the southeast, and the island of Gjervoldsøy lies to the west.