Cheyenne River Indian Reservation
| Cheyenne River Indian Reservation | |
|---|---|
| Farmland on the reservation | |
| Location in South Dakota | |
| Coordinates: 45°04′35″N 101°13′33″W / 45.07639°N 101.22583°W | |
| Tribe | Cheyenne River Sioux Tribe | 
| Country | United States | 
| State | South Dakota | 
| Counties | Dewey Haakon Meade Stanley Ziebach | 
| Established | 1889 | 
| Government | |
| • Governing body | General Tribal Council | 
| Area | |
|  • Total | 11,051.447 km2 (4,266.987 sq mi) | 
| Population  (2010) | |
|  • Total | 8,090 | 
| Time zone | UTC-7 (MST) | 
| • Summer (DST) | UTC-6 (MDT) | 
| GDP | $154.8 Million (2018) | 
| Website | cheyenneriversioux.com | 
The Cheyenne River Indian Reservation was created by the United States in 1889 by breaking up the Great Sioux Reservation, following the attrition of the Lakota in a series of wars in the 1870s. The reservation covers almost all of Dewey and Ziebach counties in South Dakota. In addition, many small parcels of off-reservation trust land are located in Stanley, Haakon, and Meade counties.
The total land area is 4,266.987 sq mi (11,051.447 km2), making it the fourth-largest Indian reservation in land area in the United States. Its largest community is unincorporated North Eagle Butte, while adjacent Eagle Butte is its largest incorporated city.