| Zip Code | City | Population ↓ |
|---|---|---|
| 28173 | Waxhaw | 62,501 |
| 28110 | Monroe | 54,577 |
| 28079 | Indian Trail | 40,539 |
| 28104 | Matthews | 35,285 |
| 28112 | Monroe | 27,845 |
| 28103 | Marshville | 10,499 |
| 28174 | Wingate | 8,547 |
| 28108 | Mineral Springs | 27 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 8 ZCTAs in Union County, North Carolina (US Census).