Postal reference / United States

53191Williams Bay, Wisconsin

ZIP code 53191 is a United States postal code for Williams Bay, Wisconsin. Its county association is Walworth County. The map reference point is at 42.5767, -88.5431.

State / territory: Wisconsin
Recorded place name: Williams Bay
County association: Walworth
Estimated coordinate: 42.5767, -88.5431
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ZIP prefix: 531 · 66 ZIP codes share it
Data source: GeoNames postal reference, snapshot September 26, 2026

GeoNames reference data. County associations may not include every intersecting county, place names are postal names rather than legal boundaries, and coordinates are approximate. This is not address validation.

Area

Land area: 3.953 sq mi (2023 Census Gazetteer)

Figures are for the ZIP Code Tabulation Area (ZCTA) that most closely matches this ZIP code, not an exact match to USPS delivery boundaries. Source: U.S. Census Bureau, 2023 Gazetteer + 2023 ACS 5-Year Estimates, retrieved 2026-09-27. How to read this data.

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Nearby ZIP code reference points

ZIP code	Place	State	County association	Miles
53125	Fontana	WI	Walworth	2.7
53184	Walworth	WI	Walworth	4.2
53147	Lake Geneva	WI	Walworth	4.5
53195	Zenda	WI	Walworth	5.3
53115	Delavan	WI	Walworth	5.3
53176	Springfield	WI	Walworth	7.7
53121	Elkhorn	WI	Walworth	8.6
53157	Pell Lake	WI	Walworth	9.7

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