Atka is a small city located on the east side of Atka Island, in Aleutians West Census Area, Alaska, United States. The population was 53 at the 2020 census, down from 61 in 2010.

Aleutian Region School District is a school district headquartered in Anchorage, Alaska. It serves the Aleutian Islands west of Unalaska, including Adak, Atka, and Nikolski. ARSD is the school district in the United States that is both the farthest east and the farthest west. Several uninhabited islands, including Attu and Shemya, are within the district's physical boundaries.