Williams Bay Wisconsin ZIP Codes
Williams Bay holds a single ZIP code.
Every ZIP code in Williams Bay
| ZIP code | County |
|---|---|
| 53191 | Walworth County |
We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Williams Bay codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Williams Bay. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated . ZIP codes are delivery-route groupings, not areas; the boundaries implied by any ZIP map are approximations.
How these codes cluster
Every Williams Bay ZIP code begins 531. Those first three digits identify the sectional center facility that processes mail for this part of Wisconsin. Statewide that range covers 66 ZIP codes, so Williams Bay accounts for 2% of it.
Every Wisconsin ZIP prefix and the region it covers →
Area codes covering Williams Bay
ZIP codes and area codes are separate systems — one routes mail, the other routes calls — and they do not share boundaries. The code below serves the same ground Williams Bay occupies.
Williams Bay Wisconsin area codes in full →
Where Williams Bay's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Williams Bay
| City | Distance | ZIP codes |
|---|---|---|
| Walworth Wisconsin ZIP codes | 4.1 mi | 1 ZIP code |
| Delavan Wisconsin ZIP codes | 5.6 mi | 1 ZIP code |
| Lake Geneva Wisconsin ZIP codes | 6.0 mi | 1 ZIP code |
| Elkhorn Wisconsin ZIP codes | 6.4 mi | 1 ZIP code |
| Darien Wisconsin ZIP codes | 8.7 mi | 1 ZIP code |
| Sharon Wisconsin ZIP codes | 11 mi | 1 ZIP code |
| Genoa City Wisconsin ZIP codes | 13 mi | 1 ZIP code |
| Genoa Wisconsin ZIP codes | 13 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.