The Fort Peck Indian Reservation is located near Fort Peck, Montana, in the northeast part of the state. It is the home of several federally recognized bands of Assiniboine, Lakota, and Dakota peoples of Native Americans.

The Assiniboine or Assiniboin people, also known as the Hohe and known by the endonym Nakota, are a First Nations/Native American people originally from the Northern Great Plains of North America.