Unalaska (Aleut: Iluulux̂) is a city in the Aleutians West Census Area, a regional component of the Unorganized Borough in the U.S. state of Alaska. Unalaska is located on Unalaska Island and neighboring Amaknak Island in the Aleutian Islands off mainland Alaska. The population was 4,376 at the 2010 census, which is 79% of the entire Aleutians West Census Area. Unalaska is the second-largest city in the Unorganized Borough, behind Bethel.
The Aleut or Unangan people have lived on Unalaska Island for thousands of years. The Unangan, who were the first to inhabit the island of Unalaska, named it "Ounalashka", meaning "near the peninsula". The regional native corporation has adopted this moniker, and is known as the Ounalashka Corporation. The Russian fur trade reached Unalaska when Stepan Glotov and his crew arrived on August 1, 1759. Natives, Russians and their descendants comprised most of the community's population until the middle 20th century, when the involvement of the United States in World War II led to a large-scale influx of people and construction of buildings all along the strategically-located Aleutians.
Unalaska (Aleut: Nawan-Alaxsxa) is an island in the Fox Islands group of the Aleutian Islands in the US state of Alaska located at 53°38′N 167°00′W / 53.633°N 167.000°W / 53.633; -167.000. The island has a land area of 1,051 square miles (2,720 km2). It measures 127.8 kilometres (79.4 mi) long and 55.9 kilometres (34.7 mi) wide. The city of Unalaska, Alaska, covers part of the island and all of neighboring Amaknak Island where the Port of Dutch Harbor is located. The population of the island excluding Amaknak as of the 2000 census was 1,759 residents.
Unalaska is the second-largest island in the Fox Islands group and the Aleutian Islands. The coastline of Unalaska is markedly different in appearance than other major Aleutian Islands, with innumerable inlets and peninsulas. The irregular coastline is broken by three long deep bays, Beaver Inlet, Unalaska Bay, and Makushin Bay, as well as by numerous smaller bays and coves. Unalaska's terrain is rugged and covered with mountains, and during the greater part of the year the higher elevations are covered with snow.