ZIP Code 53820

53820 is one of Wisconsin's ZIP codes, delivering to addresses in Potosi, Grant County.

City: Potosi
County: Grant County
State: Wisconsin
Prefix: 538xx

Where this code sits

53820 is part of the 538xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Potosi.

Potosi Wisconsin ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 53820 delivers to without sharing its boundary.

ZIP codes nearest 53820

The ZIP codes whose reference points sit closest to 53820.
ZIP code	Distance	Delivers to
ZIP code 53808	6.9 mi	Dickeyville, WI
ZIP code 52073	7.5 mi	Sherrill, IA
ZIP code 53812	8.9 mi	Kieler, WI
ZIP code 53813	11 mi	Lancaster, WI
ZIP code 53818	12 mi	Platteville, WI
ZIP code 53802	12 mi	Beetown, WI
ZIP code 52001	12 mi	Dubuque, IA
ZIP code 52002	12 mi	Dubuque, IA

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 53820, plotted from its record coordinates.

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

Scope ZIP code 53820. 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.