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County ZIP codes · Wisconsin · FIPS 55089

Ozaukee County, WI ZIP Codes

Ozaukee County, Wisconsin has 12 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 8 of the residential ones lie mainly in Ozaukee County and 4 mainly in a neighboring county; 6 cross the county line. Median household income ranges from $79,423 in 53074 (Port Washington) to $135,929 in 53097 (Mequon) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Ozaukee County?

53004 · Belgium: $85k53012 · Cedarburg: $96k53013 · Cedar Grove: $84k53021 · Fredonia: $90k53024 · Grafton: $92k53074 · Port Washington: $79k53075 · Random Lake: $94k53080 · Saukville: $80k53090 · West Bend: $86k53092 · Mequon: $128k53095 · West Bend: $81k53097 · Mequon: $136k53090530955302153013530755301253074530805309753004530245309253004 · Belgium: $85k53012 · Cedarburg: $96k53013 · Cedar Grove: $84k53021 · Fredonia: $90k53024 · Grafton: $92k53074 · Port Washington: $79k53075 · Random Lake: $94k53080 · Saukville: $80k53090 · West Bend: $86k53092 · Mequon: $128k53095 · West Bend: $81k53097 · Mequon: $136k530905309553021530135307553012530745308053097530045302453004 · Belgium: $85k53012 · Cedarburg: $96k53013 · Cedar Grove: $84k53021 · Fredonia: $90k53024 · Grafton: $92k53074 · Port Washington: $79k53075 · Random Lake: $94k53080 · Saukville: $80k53090 · West Bend: $86k53092 · Mequon: $128k53095 · West Bend: $81k53097 · Mequon: $136k5309053095530215301353075530125307453080530975300453024
The residential ZIP codes of Ozaukee County (whole outlines, including the parts in neighboring counties), shaded by median household income in national fifths (ACS 2020-2024). <$54.1k$98.1k+no figure

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 $80,830 and $93,750.

They carry 10 postal town names.

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).

All 12 residential ZIP codes in Ozaukee County

8 ZIP codes lie mainly in Ozaukee County; 4 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Ozaukee County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
53092 Mequon 20,886 1,029 $128k $473k 100%
53012 Cedarburg 19,183 567 $96k $423k 69%
53024 Grafton 18,982 690 $92k $366k 100%
53074 Port Washington 13,682 452 $79k $297k 100%
53097 Mequon 7,683 284 $136k $500k 100%
53080 Saukville 5,059 177 $80k $314k 100%
53021 Fredonia 4,537 136 $90k $316k 81%
53004 Belgium 3,475 103 $85k $256k 100%

Partly in Ozaukee County

Residential ZIP codes mainly in another county that reach at least 1% into Ozaukee County, by their share here
In this county
53013 Cedar Grove 3,717 125 $84k $278k 19%
53075 Random Lake 3,402 93 $94k $297k 10%
53095 West Bend 27,817 395 $81k $305k 6%
53090 West Bend 21,625 374 $86k $283k 3%

Download the 12 ZIP codes as CSV

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?

6 ZIP codes of Ozaukee County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Ozaukee County and in the neighboring counties
ZIPIn OzaukeeElsewhere
530956%Washington County 94%
530903%Washington County 97%
5301269%Washington County 31%
5302181%Washington County 18%
5301319%Sheboygan County 81%
5307510%Sheboygan County 87%; Washington County 3%

Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).

Which first three digits do Ozaukee 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 Ozaukee County starts with 530.

Three-digit prefixes of Ozaukee County's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are Ozaukee County's
PrefixSectional centerHereAll codes
530 Milwaukee, WI (SCF 530) 12 83

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.