Aleutians East, borough (6,985 sq mi/18,091 sq km; 1990 pop. 2,646), SW Alaska. Includes c.170 mi/274 km of lower Alaska Peninsula, also E Aleutian Isls. (including Unimak Isl., Sanak Isls., and Izambek Isl.); bounded NW by Bering Sea, SE by Pacific Ocean. Izambek Natl. Wildlife Reserve in center. Part of Alaska Peninsula Natl. Wildlife Reserve in NE. Fishing. Seals; hides.
