Amatignak Island is a member of the Delarof Islands

Delarof Islands

The Delarof Islands are a group of small islands at the extreme western end of the Andreanof Islands group in the central Aleutian Islands, Alaska...

 (western Andreanof Islands

Andreanof Islands

The Andreanof Islands are a group of islands in the Aleutian Islands in southwest Alaska. They are located between Amchitka Pass and the Rat Islands group to the west, and Amukta Pass and the Islands of Four Mountains group to the east, at about 52° North and 172°57' to 179°09' West. The islands...

), in Alaska

Alaska

Alaska is the largest state in the United States by area. It is situated in the northwest extremity of the North American continent, with Canada to the east, the Arctic Ocean to the north, and the Pacific Ocean to the west and south, with Russia further west across the Bering Strait...

's Aleutian archipelago. The south-most point of Alaska is on this island, as well as the highest western longitude

Longitude

Longitude is a geographic coordinate that specifies the east-west position of a point on the Earth's surface. It is an angular measurement, usually expressed in degrees, minutes and seconds, and denoted by the Greek letter lambda ....

 of the United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 and North America

North America

North America is a continent wholly within the Northern Hemisphere and almost wholly within the Western Hemisphere. It is also considered a northern subcontinent of the Americas...

.

The island is about 5 mi (8 km) long north-to-south, and about 3 mi (4 km) wide east-to-west. The nearest island is Ulak Island

Ulak Island

Ulak Island is an island in the Delarof Islands subgroup of the Andreanof Islands in the Aleutian Islands chain of Alaska.Ulak is roughly 4 mi northwest of Amatignak Island.- External Links :*...

about 4 mi (6 km) to the northeast.