Post Offices List in Picayune City, Mississippi:
| Picayune Carrier Annex Post Office | 6342 Highway 11 N, Picayune, MS 39466 |
| Picayune Post Office | 120 Highway 11 N, Picayune, MS 39466 |
| Picayune Carrier Annex Post Office | 6342 Highway 11 N, Picayune, MS 39466 |
| Picayune Post Office | 120 Highway 11 N, Picayune, MS 39466 |