| Zip Code | City | Population ↓ |
|---|---|---|
| 37683 | Mountain City | 13,686 |
| 37640 | Butler | 3,517 |
| 37688 | Shady Valley | 945 |
| 37691 | Trade | 555 |
| 37680 | Laurel Bloomery | 454 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 5 ZCTAs in Johnson County, Tennessee (US Census).