Rocky Boy Tribe of Chippewa Indians of Montana
It is one of the many communities of the Black Hills Indian Reservation. Quechan is located on the Fort Yuma Indian Reservation. It is adjacent to Yuma, Arizona. Winterhaven is also located on the Fort Yuma Indian Reservation. I don't know what the population or demographics of Quechan are. Below are several google earth photos of Quechan. It is a small town.