阿特卡岛是美国的岛屿，属于安德烈亚诺夫群岛的一部分，由阿拉斯加州负责管辖，长105公里、宽32公里，面积1,048平方公里，是该国第22大岛屿，最高点海拔高度1,533米，2000年人口95。

Atka Island (Aleut:Atx̂ax̂) is the largest island in the Andreanof Islands of the Aleutian Islands of Alaska. The island is 50 miles (80 km) east of Adak Island. It is 65 miles (105 km) long and 2–20 miles (3–30 km) wide with a land area of 404.6 square miles (1,048 km), making it the 22nd largest island in the United States. The northeast of Atka Island contains the Korovin volcano which reaches a peak of 5,030 feet (1,533 m). Oglodak Island is located 3.4 miles (3.0 nmi; 5.5 km) off Cape Kigun, Atka's westernmost point.