Great Sitkin Island (Aleut: Sitх̑naх̑) is a volcanic island in the Andreanof Islands of the Aleutian Islands of Alaska. The island covers a total area of 60sqmi and lies slightly north of a group of islands which are located between Adak Island and Atka Island. The northern portion of the island is dominated by the complex Great Sitkin Volcano which rises to a height of 5710ft. The island is 18km long and 16.94km wide.