| Locality | Post Code |
|---|---|
| Hemby, Union | 28079 |
| Hemby Bridge, Union | 28079 |
| Indian Trail, Union | 28079 |
| Lake Park, Union | 28079 |
| Marshville, Union | 28103 |
| Marvin, Union | 28173 |
| Matthews, Union | 28104 |
| Mineral Springs, Union | 28108 |
| Monroe, Union | 28110, 28112 |
| Olive Branch, Union | 28103 |
| Stallings, Union | 28104 |
| Unionville, Union | 28110 |
| Waxhaw, Union | 28173 |
| Weddington, Union | 28104 |
| Wesley Chapel, Union | 28104 |
| Wingate, Union | 28174 |