Post Offices List in Posey County, Indiana:
| Cynthiana Post Office | 10864 Main St, Cynthiana, IN 47612 |
| Griffin Post Office | 224 S Main St, Griffin, IN 47616 |
| Mount Vernon Post Office | 308 Walnut St, Mount Vernon, IN 47620 |
| New Harmony Post Office | 534 Church St, New Harmony, IN 47631 |
| Poseyville Post Office | 41 S Locust St, Poseyville, IN 47633 |
| Wadesville Post Office | 7255 Main St, Wadesville, IN 47638 |