Kewaunee County ZIP Codes

Kewaunee County is a county of Wisconsin.

ZIP codes: 4
Cities & towns: 4
Area codes: 2
Land area: 342 sq mi

Every ZIP code in Kewaunee County

542xx

The complete list of Kewaunee County, WI ZIP codes with the city each one delivers to.
ZIP code	City
54201	Algoma
54205	Casco
54216	Kewaunee
54217	Luxemburg

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Kewaunee County codes above are listed without a column we would have to invent.

Cities and towns in Kewaunee County

Area codes covering Kewaunee County

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

Where Kewaunee County's ZIP codes sit

Each point is the reference point of one Kewaunee 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 Kewaunee 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.