Ozaukee County ZIP Codes

Ozaukee County is a county of Wisconsin.

ZIP codes: 8
Cities & towns: 7
Area codes: 2
Land area: 233 sq mi

Every ZIP code in Ozaukee County

530xx

The complete list of Ozaukee County, WI ZIP codes with the city each one delivers to.
ZIP code	City
53004	Belgium
53012	Cedarburg
53021	Fredonia
53024	Grafton
53074	Port Washington
53080	Saukville
53092	Mequon
53097	Mequon

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP. USPS delivery-type products are licensed, and no clean-rights source maps ZIP codes to neighbourhoods — so the Ozaukee County codes above are listed without a column we would have to invent.

Cities and towns in Ozaukee County

Area codes covering Ozaukee County

Telephone and postal boundaries are drawn by different bodies, so these codes overlap the county without matching its edges.

Where Ozaukee County's ZIP codes sit

Each point is the reference point of one Ozaukee County ZIP code, plotted from its record coordinates. The outline is the convex envelope of those points — a footprint, not a boundary.

Reference points and footprint
Not an official NANPA boundary
Not a USPS delivery area

Scope every ZIP code recorded in Ozaukee County. Source GeoNames US postal codes (2026-07 postal dump), Census 2024 county Gazetteer (2024 Gazetteer) and geoinfo-dataset (full_dataset) ZIP→NPA (2018 snapshot). Updated 16 July 2026. The outline is a convex envelope of ZIP reference points, not a jurisdiction boundary.