County ZIP codes · Tennessee · FIPS 47177
Warren County, TN ZIP Codes
Warren County, Tennessee has 9 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 7 residential and 2 for PO boxes or a single organization. 5 of the residential ones lie mainly in Warren County and 2 mainly in a neighboring county; 5 cross the county line. Median household income ranges from $52,797 in 37166 (Smithville) to $64,792 in 37190 (Woodbury) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Warren 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 $52,932 and $59,268.
They carry 7 postal town names: McMinnville, Smithville, Woodbury, Morrison, Rock Island, Viola, Campaign.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 7 residential ZIP codes in Warren County
5 ZIP codes lie mainly in Warren County; 2 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 37110 | McMinnville | 34,296 | 92 | $53k | $198k | 79% |
| 37357 | Morrison | 6,210 | 46 | $59k | $168k | 54% |
| 38581 | Rock Island | 4,079 | 42 | $56k | $183k | 53% |
| 37394 | Viola | 114 | 797 | $49k | $268k | 100% |
| 38550 | Campaign | 17 | 5,667 | – | – | 100% |
Partly in Warren County
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?
5 ZIP codes of Warren County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Warren | Elsewhere |
|---|---|---|
| 37110 | 79% | Grundy County 15%; Van Buren County 3%; Cannon County 2%; Sequatchie County 2% |
| 37166 | 7% | DeKalb County 91%; Cannon County 2% |
| 37190 | 2% | Cannon County 98% |
| 37357 | 54% | Coffee County 29%; Grundy County 10%; Cannon County 7% |
| 38581 | 53% | Van Buren County 45%; DeKalb County 1% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
PO Box and single-organization ZIP codes
| ZIP | Postal name |
|---|---|
| 37111 | McMinnville |
| 37378 | Smartt |
Source: GeoNames postal codes (CC BY 4.0).
Which first three digits do Warren County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Warren County's ZIP codes use 3 prefixes: 371, 373 and 385.
| Prefix | Sectional center | Here | All codes |
|---|---|---|---|
| 371 | Nashville, TN (SCF 370) | 4 | 57 |
| 373 | Chattanooga, TN (SCF 373) | 3 | 87 |
| 385 | Nashville, TN (SCF 370) | 2 | 49 |
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.