8 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 28173 | Waxhaw | 63,503 |
| 28110 | Monroe | 55,807 |
| 28079 | Indian Trail | 40,820 |
| 28104 | Matthews | 36,232 |
| 28112 | Monroe | 27,651 |
| 28103 | Marshville | 11,058 |
| 28174 | Wingate | 9,439 |
| 28108 | Mineral Springs | 31 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 8 ZCTAs in Union County, North Carolina (US Census).