| ZIP Codes: | 8 ZIP Codes (7 Standard, 1 PO Box, 0 Unique) [See All] |
| Area Codes: | 615 / 629 / 931 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:13:48 PM |
| Population: | 138,893 [See All] |
| FIPS: | 47119 |
| CBSA: | Nashville-Davidson--Murfreesboro--Franklin, TN |
| Land Area: | 719 sq mi |
| Water Area: | 2 sq mi |
| Coordinates: | 35.6342, -87.1167 |
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138,893 residents live across 8 ZIPs covering 719 sq mi, served by 7 distinct USPS-recognized cities.
Population moved from 102,209 to 138,893 from 2014 to 2024 — a +35.9% change. 5 ZIPs gained residents, 2 lost.
The county's wealthiest ZIP 37174 (Spring Hill, $105,181 median) and poorest ZIP 38474 (Mount Pleasant, $59,724) are 24.4 miles apart — a 1.8× income gap across local geography.
Median home values vary 2.0× across this county — from $247,000 in 38474 (Mount Pleasant) to $491,300 in 37174 (Spring Hill).
Density varies 52× across the county — from 15 people/sq mi in 38487 (Williamsport) to 758 in 37174 (Spring Hill).
Educational attainment ranges from 11.1% bachelor's+ in 38474 (Mount Pleasant) to 45.8% in 37174 (Spring Hill) — the breadth of educational profiles across the area.
Within Tennessee, this is the #12 most populous of 95 counties and ranks #9 for median household income with the #2 fastest decade growth .
On the national stage, Maury County is and #37 for decade growth .
Weighted by population, the typical household earns about $83,279 across the county — reflecting what a typical resident sees, not a simple ZIP average.
32.2% of adults age 25+ hold a bachelor's degree or higher (30,378 of 94,357 reporting).
7 Standard delivery, 1 PO Box only, 0 single-entity Unique ZIPs serve this county.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 38401 | Columbia | Standard | 67,482 | $68,475 | 294.1 | 25.7% |
| 37174 | Spring Hill | Standard | 53,900 | $105,181 | 71.1 | 74.7% |
| 38474 | Mount Pleasant | Standard | 9,143 | $59,724 | 103.8 | 8.9% |
| 38451 | Culleoka | Standard | 4,145 | $90,163 | 81.7 | -18.4% |
| 38482 | Santa Fe | Standard | 2,017 | $90,272 | 44.7 | 21.5% |
| 38461 | Hampshire | Standard | 1,460 | $66,406 | 73.1 | 11.5% |
| 38487 | Williamsport | Standard | 746 | $104,458 | 50.9 | -37.9% |
| 38402 | Columbia | PO Box | — | — | 0.0 | — |