County ZIP codes · Wisconsin · FIPS 55131
Washington County, WI ZIP Codes
Washington County, Wisconsin has 18 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 17 residential and 1 for PO boxes or a single organization. 11 of the residential ones lie mainly in Washington County and 6 mainly in a neighboring county; 12 cross the county line. Median household income ranges from $80,830 in 53095 (West Bend) to $153,917 in 53017 (Colgate) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Washington 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 $91,150 and $107,414.
They carry 16 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 17 residential ZIP codes in Washington County
11 ZIP codes lie mainly in Washington County; 6 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 53095 | West Bend | 27,817 | 395 | $81k | $305k | 94% |
| 53027 | Hartford | 23,118 | 254 | $91k | $333k | 83% |
| 53090 | West Bend | 21,625 | 374 | $86k | $283k | 97% |
| 53022 | Germantown | 20,046 | 723 | $101k | $373k | 100% |
| 53037 | Jackson | 10,254 | 444 | $98k | $344k | 100% |
| 53086 | Slinger | 9,426 | 438 | $103k | $387k | 100% |
| 53040 | Kewaskum | 8,630 | 137 | $96k | $326k | 77% |
| 53033 | Hubertus | 6,286 | 394 | $137k | $477k | 100% |
| 53017 | Colgate | 5,458 | 316 | $154k | $522k | 88% |
| 53076 | Richfield | 3,109 | 139 | $107k | $448k | 100% |
| 53002 | Allenton | 2,584 | 75 | $118k | $333k | 98% |
Partly in Washington County
| In this county | ||||||
|---|---|---|---|---|---|---|
| 53012 | Cedarburg | 19,183 | 567 | $96k | $423k | 31% |
| 53021 | Fredonia | 4,537 | 136 | $90k | $316k | 18% |
| 53010 | Campbellsport | 7,444 | 71 | $95k | $307k | 5% |
| 53091 | Theresa | 2,123 | 83 | $83k | $208k | 4% |
| 53075 | Random Lake | 3,402 | 93 | $94k | $297k | 3% |
| 53029 | Hartland | 21,778 | 579 | $108k | $479k | 3% |
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?
12 ZIP codes of Washington County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Washington | Elsewhere |
|---|---|---|
| 53095 | 94% | Ozaukee County 6% |
| 53027 | 83% | Dodge County 17% |
| 53029 | 3% | Waukesha County 97% |
| 53090 | 97% | Ozaukee County 3% |
| 53012 | 31% | Ozaukee County 69% |
| 53040 | 77% | Sheboygan County 13%; Fond du Lac County 11% |
| 53010 | 5% | Fond du Lac County 95% |
| 53017 | 88% | Waukesha County 12% |
| 53021 | 18% | Ozaukee County 81% |
| 53075 | 3% | Sheboygan County 87%; Ozaukee County 10% |
| 53002 | 98% | Dodge County 2% |
| 53091 | 4% | Dodge County 96% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
PO Box and single-organization ZIP codes
| ZIP | Postal name |
|---|---|
| 53060 | Newburg |
Source: GeoNames postal codes (CC BY 4.0).
Which first three digits do Washington County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Every ZIP code of Washington County starts with 530.
| Prefix | Sectional center | Here | All codes |
|---|---|---|---|
| 530 | Milwaukee, WI (SCF 530) | 18 | 83 |
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.