| Post Office | Humboldt |
| Division | Gibson |
| Pincode | 38343 |
| Post Office | Milan |
| Division | Gibson |
| Pincode | 38358 |
| Post Office | Trenton |
| Division | Gibson |
| Pincode | 38382 |
| Post Office | Medina |
| Division | Gibson |
| Pincode | 38355 |
| Post Office | Dyer |
| Division | Gibson |
| Pincode | 38330 |
| Post Office | Bradford |
| Division | Gibson |
| Pincode | 38316 |