The Andreanof Islands 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. The islands extend about 275 miles (440 km). The total land area of all islands (including the Delarof Islands) is 1,515.349 sq mi (3,924.737 km²).
The Delarof Islands are a subgroup of the Andreanof Islands group as well as the westernmost islands in the group.
The islands are usually foggy and are treeless because of the almost constant wind.
The Andreanof Islands were named for the Russian navigator, Andreyan Tolstykh, who was the first to explore the islands in 1761.
There were several United States military bases on the islands during World War II. The bases on Adak were enlarged and made permanent after the war but were closed in 1995.
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- Andreanof Islands: Blocks 1083 thru 1137, Census Tract 1, Aleutians West Census Area, Alaska United States Census Bureau
- Bergsland, K. (1994). Aleut Dictionary. Fairbanks: Alaska Native Language Center.