Washington County, TN ZIP codes
There are 11 ZIP codes in Washington County, TN, in 6 towns, from 37601 to 37690. The largest are 37604 (Johnson City), 37601 (Johnson City) and 37659 (Jonesborough). 1 more crosses into it from a neighbouring county: 37641.
The county seat is Jonesborough.
- ZIP codes
- 11
- Partly in it
- 1 more
- Towns
- 6
- County seat
- Jonesborough
- County FIPS
47179- State
- Tennessee
- Population
- 136,261
- Median household income
- $62,809
- Land area
- 327 sq mi
- Area code
- 423
- Metro area
- Johnson City
Washington County ZIP codes by town
- Jonesborough (county seat)
- 37659
Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.
ZIP codes partly in Washington County
This ZIP code lies mostly in a neighbouring county but covers a twentieth or more of Washington County.
- 37641 Chuckey · mostly in Greene County
Map of Washington County ZIP codes
The ZIP codes of Washington County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.
Washington County in numbers
About 136,261 people live in Washington County, in 56,759 households, the 12th most populous of Tennessee's 95 counties. The median household income is $62,809 a year, 10% below the Tennessee median of $69,595 (US: $80,734). The median owner-occupied home is valued at $249,000 (13% below the Tennessee median), and median gross rent is $1,005 a month. The median age is 40.2; 34.3% of adults 25 and over hold a bachelor's degree or higher (31.1% across Tennessee); the average commute takes 22 minutes.
| Population | 136,261 |
|---|---|
| Households | 56,759 |
| Median age | 40.2 |
| Median household income | $62,809 |
| Median home value | $249,000 |
| Median gross rent | $1,005 |
| Bachelor's degree or higher | 34.3% |
| Mean commute | 21.6 min |
| Population density | 417 / sq mi |
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.
Largest towns in Washington County
| Town | ZIP codes | Population |
|---|---|---|
| Johnson City | 6 | 72,222 |
| Jonesborough | 1 | 6,232 |
| Limestone | 1 | 5,723 |
| Fall Branch | 1 | 1,160 |
| Telford | 1 | 731 |
Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.
Neighbouring counties
Counties that share a ZIP code with Washington County.
Not sure you are in Washington County? What county am I in? answers from your location, near a county line included.
Every ZIP code in Washington County, with figures
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
37601 | Johnson City , TN | Standard | 38,008 | $50,686 | $216,200 |
37602 | Johnson City , TN | No street area | — | — | — |
37604 | Johnson City , TN | Standard | 39,097 | $52,345 | $259,600 |
37605 | Johnson City , TN | No street area | — | — | — |
37614 | Johnson City , TN | Standard | 2,767 | — | — |
37615 | Johnson City , TN | Standard | 22,821 | $77,525 | $294,900 |
37656 | Fall Branch , TN | Standard | 3,849 | $63,617 | $236,600 |
37659 | Jonesborough , TN | Standard | 29,080 | $71,110 | $249,600 |
37681 | Limestone , TN | Standard | 5,723 | $65,857 | $177,300 |
37684 | Mountain Home , TN | No street area | — | — | — |
37690 | Telford , TN | Standard | 4,722 | $74,286 | $246,200 |
Cite this page
zipcodes.pro. “Washington County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/tn/county/washington
Underlying data is public domain or openly licensed — sources, vintages and licences.