Post Offices List in Osborne County, Kansas:
| Alton Post Office | 703 MIll St Ste B, Alton, KS 67623 |
| Downs Post Office | 808 Morgan Ave, Downs, KS 67437 |
| Natoma Post Office | 402 Elm St, Natoma, KS 67651 |
| Osborne Post Office | 233 W Main St, Osborne, KS 67473 |
| Portis Post Office | 411 Market St, Portis, KS 67474 |
| Waldo Post Office | 422 Main St, Waldo, KS 67673 |