3 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 37807 | Maynardville | 11,008 |
| 37779 | Luttrell | 3,376 |
| 37866 | Sharps Chapel | 2,090 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 3 ZCTAs in Union County, Tennessee (US Census).