| ZIP Codes: | 11 ZIP Codes (7 Standard, 4 PO Box, 0 Unique) [See All] |
| Area Code: | 423 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:13:49 PM |
| Population: | 146,067 [See All] |
| FIPS: | 47179 |
| CBSA: | Johnson City, TN |
| Land Area: | 369 sq mi |
| Water Area: | 3 sq mi |
| Coordinates: | 36.3174, -82.4491 |
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146,067 residents live across 11 ZIPs covering 369 sq mi, served by 6 distinct USPS-recognized cities.
Population moved from 135,108 to 146,067 from 2014 to 2024 — a +8.1% change. 6 ZIPs gained residents, 2 lost.
The county's wealthiest ZIP 37615 (Johnson City, $77,525 median) and poorest ZIP 37601 (Johnson City, $50,686) are 9.2 miles apart — a 1.5× income gap across local geography.
Median home values vary 1.7× across this county — from $177,300 in 37681 (Limestone) to $294,900 in 37615 (Johnson City).
Density varies 215× across the county — from 86 people/sq mi in 37681 (Limestone) to 18,595 in 37614 (Johnson City).
Most of the decade's growth concentrated around Johnson City — top growth ZIPs averaged +28.1% over the past ten years ( 37614 , 37690 and 37604 ).
Educational attainment ranges from 14.7% bachelor's+ in 37681 (Limestone) to 40.9% in 37615 (Johnson City) — the breadth of educational profiles across the area.
Within Tennessee, this is the #11 most populous of 95 counties and ranks #32 for median household income with the #35 fastest decade growth .
Weighted by population, the typical household earns about $61,288 across the county — reflecting what a typical resident sees, not a simple ZIP average.
33.8% of adults age 25+ hold a bachelor's degree or higher (34,521 of 102,095 reporting). The most-educated ZIPs cluster around Johnson City.
7 Standard delivery, 4 PO Box only, 0 single-entity Unique ZIPs serve this county.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 37604 | Johnson City | Standard | 39,097 | $52,345 | 33.6 | 12.2% |
| 37601 | Johnson City | Standard | 38,008 | $50,686 | 48.9 | 4.8% |
| 37659 | Jonesborough | Standard | 29,080 | $71,110 | 127.7 | 3.7% |
| 37615 | Johnson City | Standard | 22,821 | $77,525 | 38.7 | 12.1% |
| 37681 | Limestone | Standard | 5,723 | $65,857 | 66.3 | -0.3% |
| 37690 | Telford | Standard | 4,722 | $74,286 | 24.4 | 28.8% |
| 37656 | Fall Branch | Standard | 3,849 | $63,617 | 29.2 | -9.3% |
| 37614 | Johnson City | PO Box | 2,767 | — | 0.1 | 43.2% |
| 37605 | Johnson City | PO Box | — | — | 0.0 | — |
| 37602 | Johnson City | PO Box | — | — | 0.0 | — |
| 37684 | Mountain Home | PO Box | — | — | 0.0 | — |