Founded in 1855, Butler County is one of 105 counties in the state of Kansas. Historically, Butler County was one of the original 36 counties. The city of El Dorado is the county seat. With FIPS code of 15, Butler County has a population of 67,889 and area of 1,428 square miles (3,699 km2).
List of all cities in Butler County, KS alphabetically
| City/Town | Postal Code | Area Code |
| Andover, KS | 67002 | 316 |
| Augusta, KS | 67010 | 316 |
| Beaumont, KS | 67012 | 620 |
| Benton, KS | 67017 | 316 |
| Cassoday, KS | 66842 | 620 |
| Douglass, KS | 67039 | 316 |
| El Dorado, KS | 67042 | 316 |
| Elbing, KS | 67041 | 316 |
| Latham, KS | 67072 | 620 |
| Leon, KS | 67074 | 316 |
| Potwin, KS | 67123 | 620 |
| Rosalia, KS | 67132 | 620 |
| Rose Hill, KS | 67133 | 316 |
| Rosehill, KS | 67133 | 316 |
| Towanda, KS | 67144 | 316 |
| Whitewater, KS | 67154 | 316 |