| ZIP Codes: | 4 ZIP Codes (4 Standard, 0 PO Box, 0 Unique) [See All] |
| Area Codes: | 615 / 629 / 931 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:13:45 PM |
| Population: | 21,136 [See All] |
| FIPS: | 47041 |
| Land Area: | 311 sq mi |
| Water Area: | 13 sq mi |
| Coordinates: | 35.9899, -85.9250 |
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21,136 residents live across 4 ZIPs covering 311 sq mi, served by 4 distinct USPS-recognized cities.
Population moved from 19,417 to 21,136 from 2014 to 2024 — a +8.9% change. 3 ZIPs gained residents, 1 lost.
The county's wealthiest ZIP 37095 (Liberty, $64,792 median) and poorest ZIP 37012 (Alexandria, $49,265) are 5.8 miles apart — a 1.3× income gap across local geography.
Median home values vary 1.3× across this county — from $189,200 in 37095 (Liberty) to $237,600 in 37012 (Alexandria).
Density varies 4× across the county — from 21 people/sq mi in 37095 (Liberty) to 94 in 37166 (Smithville).
Educational attainment ranges from 11.3% bachelor's+ in 37012 (Alexandria) to 24.1% in 37095 (Liberty) — the breadth of educational profiles across the area.
Within Tennessee, this is the #62 most populous of 95 counties and ranks #68 for median household income with the #30 fastest decade growth .
Weighted by population, the typical household earns about $53,159 across the county — reflecting what a typical resident sees, not a simple ZIP average.
19.6% of adults age 25+ hold a bachelor's degree or higher (2,912 of 14,838 reporting).
4 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.