The Confederated Tribes of Colville Reservation covers 1.4 million acres in the North Central region of the State of Washington, and is a Sovereign Nation.  The twelve aboriginal tribes that make up the Confederated tribes are the Colville, Nespelem, San Poil, Lake, Palus, Wenatchi, Chelan, Entiat, Methow, Southern Okanogan, Moses Columbia tribes and Chief Joseph's Band of the Nez Perce.

Established by a Presidential Executive Order in 1872, the reservation was originally about twice the size of the current reservation.  Tribal enrollment is approximately 8,700.  The population of the reservation itself is about 5,000, which includes Colville tribal members and their families and non-Colville members.