County ZIP codes · Missouri · FIPS 29219
Warren County, MO ZIP Codes
Warren County, Missouri has 12 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 10 residential and 2 for PO boxes or a single organization. 6 of the residential ones lie mainly in Warren County and 4 mainly in a neighboring county; 9 cross the county line. Median household income ranges from $70,368 in 65041 (Hermann) to $115,661 in 63348 (Foristell) (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 $75,282 and $82,351.
They carry 10 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 10 residential ZIP codes in Warren County
6 ZIP codes lie mainly in Warren County; 4 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 63383 | Warrenton | 16,927 | 106 | $75k | $243k | 97% |
| 63390 | Wright City | 10,970 | 140 | $82k | $268k | 88% |
| 63357 | Marthasville | 6,536 | 53 | $92k | $293k | 96% |
| 63351 | Jonesburg | 1,389 | 25 | $68k | $207k | 55% |
| 63380 | Truesdale | 990 | 800 | $59k | $214k | 100% |
| 63381 | Truxton | 618 | 22 | $112k | $237k | 34% |
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?
9 ZIP codes of Warren County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Warren | Elsewhere |
|---|---|---|
| 63383 | 97% | Lincoln County 3% |
| 63390 | 88% | Lincoln County 12% |
| 63348 | 19% | St. Charles County 78%; Lincoln County 2% |
| 63357 | 96% | St. Charles County 4% |
| 65041 | 11% | Gasconade County 71%; Montgomery County 18% |
| 63349 | 9% | Lincoln County 91% |
| 63351 | 55% | Montgomery County 45% |
| 63363 | 4% | Montgomery County 96% |
| 63381 | 34% | Montgomery County 33%; Lincoln County 33% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
PO Box and single-organization ZIP codes
| ZIP | Postal name |
|---|---|
| 63342 | Dutzow |
| 63378 | Treloar |
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 2 prefixes: 633 and 650.
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.