| Localité | Code postal |
|---|---|
| Camp Lejeune, Onslow | 28542, 28547 |
| Holly Ridge, Onslow | 28445 |
| Hubert, Onslow | 28539 |
| Jacksonville, Onslow | 28540, 28544, 28546 |
| Lejeune, Onslow | 28542 |
| McCutcheon Field, Onslow | 28545 |
| Midway Park, Onslow | 28544 |
| North Topsail Beach, Onslow | 28460 |
| Peletier, Onslow | 28584 |
| Richlands, Onslow | 28574 |
| Sneads Ferry, Onslow | 28460 |
| Swansboro, Onslow | 28584 |
| Tarawa, Onslow | 28543 |
| Tarawa Terrace, Onslow | 28543 |
| Topsail Beach, Onslow | 28445 |