County ZIP codes · Wisconsin · FIPS 55101
Racine County, WI ZIP Codes
Racine County, Wisconsin 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. 13 of the residential ones lie mainly in Racine County and 3 mainly in a neighboring county; 8 cross the county line. Median household income ranges from $50,428 in 53404 (Racine) to $110,608 in 53149 (Mukwonago) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Racine 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 $75,751 and $101,206.
They carry 12 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 16 residential ZIP codes in Racine County
13 ZIP codes lie mainly in Racine County; 3 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 53402 | Racine | 34,850 | 1,741 | $76k | $231k | 100% |
| 53105 | Burlington | 28,751 | 180 | $89k | $319k | 41% |
| 53403 | Racine | 27,009 | 2,660 | $60k | $176k | 91% |
| 53405 | Racine | 26,793 | 4,053 | $69k | $174k | 100% |
| 53406 | Racine | 25,778 | 1,574 | $83k | $290k | 100% |
| 53185 | Waterford | 18,560 | 406 | $103k | $385k | 99% |
| 53404 | Racine | 13,703 | 2,795 | $50k | $130k | 100% |
| 53182 | Union Grove | 9,821 | 178 | $107k | $329k | 67% |
| 53177 | Sturtevant | 8,489 | 307 | $91k | $250k | 87% |
| 53126 | Franksville | 7,064 | 135 | $101k | $386k | 100% |
| 53108 | Caledonia | 3,060 | 158 | $87k | $297k | 100% |
| 53139 | Kansasville | 2,523 | 79 | $100k | $306k | 65% |
| 53167 | Rochester | 157 | 355 | $70k | $345k | 100% |
Partly in Racine 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 Racine County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Racine | Elsewhere |
|---|---|---|
| 53105 | 41% | Walworth County 37%; Kenosha County 22% |
| 53403 | 91% | Kenosha County 9% |
| 53150 | 5% | Waukesha County 95% |
| 53149 | 7% | Waukesha County 84%; Walworth County 9% |
| 53185 | 99% | |
| 53120 | 9% | Walworth County 91% |
| 53182 | 67% | Kenosha County 33% |
| 53177 | 87% | Kenosha County 13% |
| 53139 | 65% | Kenosha County 35% |
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 Racine County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Racine County's ZIP codes use 2 prefixes: 531 and 534.
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.