Washington County, Tennessee ZIP codes
11 ZIP codes are in Washington County, plus 5 that cross in from neighboring counties. It's part of the Johnson City, TN metro area.
- ZIP codes
- 11
- Population in these ZIPs
- 146,067
- Avg. median income
- $61,300population-weighted
- Cities & towns
- 6
Click anywhere on the map to see which ZIP code it's in.
ZIP codes in Washington County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 37601 | Johnson City | 38,008 | $50,686 | $262,800 |
| 37602 PO Box | Johnson City | — | — | — |
| 37604 | Johnson City | 39,097 | $52,345 | $282,600 |
| 37605 PO Box | Johnson City | — | — | — |
| 37614 | Johnson City | 2,767 | — | — |
| 37615 | Johnson City | 22,821 | $77,525 | $352,300 |
| 37656 | Fall Branch | 3,849 | $63,617 | $283,800 |
| 37659 | Jonesborough | 29,080 | $71,110 | $338,000 |
| 37681 | Limestone | 5,723 | $65,857 | $289,400 |
| 37684 PO Box | Mountain Home | — | — | — |
| 37690 | Telford | 4,722 | $74,286 | $309,900 |
ZIP codes partly in Washington County
These ZIP codes are mostly in a neighboring county but cover part of Washington County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 37641 | Chuckey | Greene County | 9,733 | $66,570 | $253,500 |
| 37650 | Erwin | Unicoi County | 12,774 | $50,654 | $222,700 |
| 37663 | Kingsport | Sullivan County | 14,230 | $76,007 | $309,500 |
| 37686 | Piney Flats | Sullivan County | 9,495 | $84,264 | $383,200 |
| 37694 | Watauga | Carter County | 1,729 | $81,250 | $242,600 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities and towns in Washington County
Nearby counties
Frequently asked questions
How many ZIP codes are in Washington County, Tennessee?
11 ZIP codes are mainly in Washington County, and 5 more ZIP codes from neighboring areas reach partly into it.
What cities are in Washington County?
ZIP codes in Washington County use the city names Fall Branch, Johnson City, Jonesborough, Limestone, Mountain Home and Telford.
What metro area is Washington County in?
Washington County is part of the Johnson City, TN metropolitan statistical area.