阿恩岛是挪威的岛屿，位于该国北部，由特罗姆斯郡负责管辖，长23.6公里、宽14.4公里，面积276平方公里，海岸线长度91公里，最高点海拔高度1,168米，2010年人口366。

Arnøya or Arnøy is an island in the municipality of Skjervøy in Troms county, Norway. Its area is 276 square kilometres (107 sq mi). The highest peak is the 1,168-metre (3,832 ft) tall mountain Arnøyhøgda. Arnøya is the 15th largest island in Norway. There are regular ferry connections from Laukøya and Kågen to this island, but there are no road connections to the island. Arnøy Church is located on the southern shore of the island.