Post Offices List in Marion County, Mississippi:
| Columbia Post Office | 815 Main St, Columbia, MS 39429 |
| Foxworth Post Office | 72 Highway 587, Foxworth, MS 39483 |
| Kokomo Post Office | 364 Old Highway 24 W, Kokomo, MS 39643 |
| Sandy Hook Post Office | 480 John Ford Home Rd, Sandy Hook, MS 39478 |