Founded in 1875, Chautauqua County is one of 105 counties in the state of Kansas. Historically, Chautauqua County was formed from Howard County. The city of Sedan is the county seat. With FIPS code of 19, Chautauqua County has a population of 3,395 and area of 642 square miles (1,663 km2).
List of all cities in Chautauqua County, KS alphabetically
| City/Town | Postal Code | Area Code |
| Cedar Vale, KS | 67024 | 620 |
| Chautauqua, KS | 67334 | 620 |
| Hewins, KS | 67024 | 620 |
| Niotaze, KS | 67355 | 620 |
| Peru, KS | 67360 | 620 |
| Sedan, KS | 67361 | 620 |