Arnøya (Norwegian) or Árdni (Northern Sami)[1] is the 15th largest island in Norway.

The 276-square-kilometre (107 sq mi) island is located in Skjervøy Municipality in Troms county.

The villages of Årviksand, Arnøyhamn, Akkarvik, and Lauksletta are located on the island.

The island of Laukøya is located just to the east, Skjervøya and Kågen are to the southeast, and Vannøya is to the west.

The Lyngen Alps are located south of Arnøya and they are a popular place for extreme skiers.