Post Offices List in Gibson County, Indiana:
| Fort Branch Post Office | 105 E Vine St, Fort Branch, IN 47648 |
| Francisco Post Office | 308 W Main St, Francisco, IN 47649 |
| Haubstadt Post Office | 107 W Haub St, Haubstadt, IN 47639 |
| Mackey Post Office | 9500 E Main St, Mackey, IN 47654 |
| Oakland City Post Office | 130 W Harrison St, Oakland City, IN 47660 |
| Owensville Post Office | 100 S MIll St, Owensville, IN 47665 |
| Patoka Post Office | 110 S Main St, Patoka, IN 47666 |
| Princeton Post Office | 129 E Broadway St, Princeton, IN 47670 |