ZIP Code 54205

54205 is one of Wisconsin's ZIP codes, delivering to addresses in Casco, Kewaunee County.

City: Casco
County: Kewaunee County
State: Wisconsin
Prefix: 542xx

Where this code sits

54205 is part of the 542xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Casco.

Casco Wisconsin ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 54205 delivers to without sharing its boundary.

ZIP codes nearest 54205

The ZIP codes whose reference points sit closest to 54205.
ZIP code	Distance	Delivers to
ZIP code 54217	5.1 mi	Luxemburg, WI
ZIP code 54201	8.3 mi	Algoma, WI
ZIP code 54213	9.5 mi	Forestville, WI
ZIP code 54229	10 mi	New Franken, WI
ZIP code 54216	10 mi	Kewaunee, WI
ZIP code 54204	11 mi	Brussels, WI
ZIP code 54226	13 mi	Maplewood, WI
ZIP code 54311	16 mi	Green Bay, WI

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 54205, plotted from its record coordinates.

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

Scope ZIP code 54205. 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.