Post Offices List in Chautauqua County, Kansas:
| Cedar Vale Post Office | 706 Cedar St, Cedar Vale, KS 67024 |
| Chautauqua Post Office | 100 E Laurel St, Chautauqua, KS 67334 |
| Niotaze Post Office | 113 W North 2nd St, Niotaze, KS 67355 |
| Peru Post Office | 101 E 6th St, Peru, KS 67360 |
| Sedan Post Office | 205 W Main St, Sedan, KS 67361 |