Columbia County ZIP Codes

Columbia County is a county of Wisconsin.

ZIP codes: 14
Cities & towns: 14
Area codes: 4
Land area: 766 sq mi

Every ZIP code in Columbia County

535xx–539xx

The complete list of Columbia County, WI ZIP codes with the city each one delivers to.
ZIP code	City
53555	Lodi
53901	Portage
53911	Arlington
53923	Cambria
53925	Columbus
53928	Doylestown
53932	Fall River
53935	Friesland
53954	Pardeeville
53955	Poynette
53957	Randolph
53960	Rio
53965	Wisconsin Dells
53969	Wyocena

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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

Cities and towns in Columbia County

Area codes covering Columbia County

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

Where Columbia County's ZIP codes sit

Each point is the reference point of one Columbia 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 Columbia 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.