| ZIP Codes: | 3 ZIP Codes (3 Standard, 0 PO Box, 0 Unique) [See All] |
| Area Code: | 423 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:13:49 PM |
| Population: | 18,600 [See All] |
| FIPS: | 47171 |
| CBSA: | Johnson City, TN |
| Land Area: | 192 sq mi |
| Water Area: | 1 sq mi |
| Coordinates: | 36.1014, -82.4502 |
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18,600 residents live across 3 ZIPs covering 192 sq mi, served by 3 distinct USPS-recognized cities.
Population moved from 18,210 to 18,600 from 2014 to 2024 — a +2.1% change. 2 ZIPs gained residents, 1 lost.
The county's wealthiest ZIP 37657 (Flag Pond, $73,108 median) and poorest ZIP 37650 (Erwin, $50,654) are 7.1 miles apart — a 1.4× income gap across local geography.
Median home values vary 1.4× across this county — from $168,100 in 37650 (Erwin) to $232,600 in 37692 (Unicoi).
Density varies 4× across the county — from 29 people/sq mi in 37657 (Flag Pond) to 124 in 37650 (Erwin).
Educational attainment ranges from 18.9% bachelor's+ in 37650 (Erwin) to 31.6% in 37657 (Flag Pond) — the breadth of educational profiles across the area.
Within Tennessee, this is the #70 most populous of 95 counties and ranks #51 for median household income .
Weighted by population, the typical household earns about $52,671 across the county — reflecting what a typical resident sees, not a simple ZIP average.
21.9% of adults age 25+ hold a bachelor's degree or higher (2,971 of 13,577 reporting).
3 Standard delivery, 0 PO Box only, 0 single-entity Unique ZIPs serve this county.
One ZIP holds the majority of this county's population — a sign of a county built around a single city or town.