Post Offices List in Ottawa County, Kansas:
| Bennington Post Office | 116 N Nelson St, Bennington, KS 67422 |
| Delphos Post Office | 120 N Main St, Delphos, KS 67436 |
| Minneapolis Post Office | 112 W 2nd St, Minneapolis, KS 67467 |
| Tescott Post Office | 101 S Main St, Tescott, KS 67484 |