アダック島
Atka Island (, ) is the largest island in the Andreanof Islands of the Aleutian Islands of Alaska. The island is east of Adak Island. It is long and wide with a land area of , making it the 22nd largest island in the United States. The northeast of Atka Island contains the Korovin volcano which reaches a peak of . Oglodak Island is located off Cape Kigun, Atka's westernmost point.