ZIP Code 54121

54121 is one of Wisconsin's ZIP codes, delivering to addresses in Florence, Florence County.

City: Florence
County: Florence County
State: Wisconsin
Prefix: 541xx

Where this code sits

54121 is part of the 541xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Florence.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 54121 delivers to without sharing its boundary.

ZIP codes nearest 54121

The ZIP codes whose reference points sit closest to 54121.
ZIP code	Distance	Delivers to
ZIP code 49801	9.5 mi	Iron Mountain, MI
ZIP code 49802	10 mi	Kingsford, MI
ZIP code 49902	12 mi	Alpha, MI
ZIP code 49876	13 mi	Quinnesec, MI
ZIP code 54151	14 mi	Niagara, WI
ZIP code 54120	14 mi	Fence, WI
ZIP code 49881	15 mi	Sagola, MI
ZIP code 49920	15 mi	Crystal Falls, MI

Straight-line distance between place reference points, not driving distance. Where a place has no Census Gazetteer point, its postal centroid is used instead.

Each point is the reference point for 54121, plotted from its record coordinates.

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

Scope ZIP code 54121. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. A ZIP code is a set of delivery routes, not an area; the point shown is a record coordinate, not a centre.