Ulak Island (Aleut: Yuulax̂) is an island in the Delarof Islands subgroup of the Andreanof Islands in the Aleutian Islands chain of Alaska.
Ulak is roughly 4 miles (6.4 kilometres) northeast of Amatignak Island.
Coordinates: 51°21′54″N 178°56′50″W / 51.36500°N 178.94722°W