Aleut or Unangam Tunuu is the language spoken by the Aleut living in the Aleutian Islands, Pribilof Islands, Commander Islands, and the Alaska Peninsula. Aleut is the sole language in the Aleut branch of the Eskimo–Aleut language family. The Aleut language consists of three dialects, including Unalaska, Atka/Atkan, and Attu/Attuan.

Aleuts are the Indigenous people of the Aleutian Islands, which are located between the North Pacific Ocean and the Bering Sea. Both the Aleuts and the islands are politically divided between the US state of Alaska and the Russian administrative division of Kamchatka Krai. This group is also known as the Unangax̂ in Unangam Tunuu, the Aleut language. There are 13 federally recognized Aleut tribes in the Aleut Region of Alaska. In 2000, Aleuts in Russia were recognized by government decree as a small-numbered Indigenous people.