Cheyenne County, Kansas
| Cheyenne County | |
|---|---|
| Cheyenne County Courthouse in St. Francis (2010) | |
| Location within the U.S. state of Kansas | |
| Kansas's location within the U.S. | |
| Coordinates: 39°48′N 101°48′W / 39.800°N 101.800°W | |
| Country | United States | 
| State | Kansas | 
| Founded | March 20, 1873 | 
| Named after | Cheyenne tribe | 
| Seat | St. Francis | 
| Largest city | St. Francis | 
| Area | |
|  • Total | 1,021 sq mi (2,640 km2) | 
| • Land | 1,020 sq mi (2,600 km2) | 
| • Water | 1.1 sq mi (3 km2) 0.1% | 
| Population  (2020) | |
|  • Total | 2,616 | 
| • Density | 2.6/sq mi (1.0/km2) | 
| Time zone | UTC−6 (Central) | 
| • Summer (DST) | UTC−5 (CDT) | 
| Area code | 785 | 
| Congressional district | 1st | 
| Website | cncoks.us | 
Cheyenne County is a county located in the northwestern corner of the U.S. state of Kansas. Its county seat and most populous city is St. Francis. As of the 2020 census, the county population was 2,616. The county was named after the Cheyenne tribe.