Florence County ZIP Codes

Florence County is a county of Wisconsin.

ZIP codes: 3
Cities & towns: 3
Area codes: 2
Land area: 488 sq mi

Every ZIP code in Florence County

541xx–545xx

The complete list of Florence County, WI ZIP codes with the city each one delivers to.
ZIP code	City
54120	Fence
54121	Florence
54542	Long Lake

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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

Area codes covering Florence County

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

Where Florence County's ZIP codes sit

Each point is the reference point of one Florence 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 Florence 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.