8 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 37601 | Johnson City | 38,622 |
| 37604 | Johnson City | 38,359 |
| 37659 | Jonesborough | 29,247 |
| 37615 | Johnson City | 22,013 |
| 37681 | Limestone | 6,031 |
| 37690 | Telford | 4,720 |
| 37656 | Fall Branch | 3,566 |
| 37614 | Johnson City | 2,581 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 8 ZCTAs in Washington County, Tennessee (US Census).