County ZIP codes · Tennessee · FIPS 47187
Williamson County, TN ZIP Codes
Williamson County, Tennessee has 19 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 16 residential and 3 for PO boxes or a single organization. 10 of the residential ones lie mainly in Williamson County and 6 mainly in a neighboring county; 12 cross the county line. Median household income ranges from $68,475 in 38401 (Columbia) to $178,228 in 37046 (College Grove) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Williamson County?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
How different are its ZIP codes?
The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $97,386 and $148,819.
They carry 13 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 16 residential ZIP codes in Williamson County
10 ZIP codes lie mainly in Williamson County; 6 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 37064 | Franklin | 67,513 | 367 | $128k | $735k | 99% |
| 37027 | Brentwood | 61,630 | 1,080 | $155k | $932k | 86% |
| 37067 | Franklin | 31,556 | 971 | $112k | $756k | 100% |
| 37135 | Nolensville | 24,409 | 662 | $149k | $673k | 89% |
| 37069 | Franklin | 20,209 | 562 | $158k | $816k | 100% |
| 37179 | Thompsons Station | 18,043 | 340 | $136k | $570k | 100% |
| 37062 | Fairview | 13,851 | 200 | $92k | $380k | 93% |
| 37046 | College Grove | 7,310 | 102 | $178k | $980k | 92% |
| 37014 | Arrington | 3,227 | 147 | $105k | $740k | 69% |
| 38476 | Primm Springs | 1,228 | 30 | $84k | $574k | 42% |
Partly in Williamson County
| In this county | ||||||
|---|---|---|---|---|---|---|
| 37174 | Spring Hill | 53,900 | 773 | $105k | $491k | 24% |
| 37060 | Eagleville | 3,396 | 84 | $97k | $491k | 13% |
| 37221 | Nashville | 41,935 | 850 | $98k | $464k | 8% |
| 37025 | Bon Aqua | 6,854 | 107 | $78k | $283k | 3% |
| 38401 | Columbia | 67,482 | 227 | $69k | $339k | 2% |
| 37215 | Nashville | 22,018 | 1,437 | $156k | $1.05M | 2% |
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).
Which ZIP codes cross the county line?
13 ZIP codes of Williamson County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Williamson | Elsewhere |
|---|---|---|
| 37064 | 99% | |
| 38401 | 2% | Maury County 96%; Marshall County 2% |
| 37027 | 86% | Davidson County 14% |
| 37174 | 24% | Maury County 75%; Marshall County 1% |
| 37221 | 8% | Davidson County 92% |
| 37135 | 89% | Davidson County 8%; Rutherford County 3% |
| 37215 | 2% | Davidson County 98% |
| 37062 | 93% | Dickson County 7% |
| 37046 | 92% | Rutherford County 6%; Marshall County 2% |
| 37025 | 3% | Hickman County 73%; Dickson County 24% |
| 37060 | 13% | Rutherford County 75%; Bedford County 12%; Marshall County 1% |
| 37014 | 69% | Rutherford County 31% |
| 38476 | 42% | Hickman County 40%; Maury County 17% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
PO Box and single-organization ZIP codes
Source: GeoNames postal codes (CC BY 4.0).
Which first three digits do Williamson County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Williamson County's ZIP codes use 4 prefixes: 370, 371, 372 and 384.
| Prefix | Sectional center | Here | All codes |
|---|---|---|---|
| 370 | Nashville, TN (SCF 370) | 12 | 77 |
| 371 | Nashville, TN (SCF 370) | 3 | 57 |
| 372 | Nashville, TN (SCF 370) | 2 | 39 |
| 384 | Nashville, TN (SCF 370) | 2 | 35 |
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.