| Locality | Post Code |
|---|---|
| Archer Lodge, Johnston | 27520, 27527 |
| Bagley, Johnston | 27542 |
| Benson, Johnston | 27504 |
| Clayton, Johnston | 27520, 27527 |
| Four Oaks, Johnston | 27524 |
| Kenly, Johnston | 27542 |
| Micro, Johnston | 27555 |
| Pine Level, Johnston | 27568 |
| Princeton, Johnston | 27569 |
| Selma, Johnston | 27576 |
| Smithfield, Johnston | 27577 |
| Whitley Heights, Johnston | 27520 |
| Wilsons Mills, Johnston | 27593 |