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Williams Iowa ZIP Codes

Williams holds a single ZIP code.

Every ZIP code in Williams

The complete list of Williams, Iowa ZIP codes with the county each falls in.
ZIP codeCounty
50271Hamilton 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 codes above are listed without a column we would have to invent.

Scope every ZIP code recorded for Williams. 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 ZIP code begins 502. Those first three digits identify the sectional center facility that processes mail for this part of Iowa. Statewide that range covers 65 ZIP codes, so Williams accounts for 2% of it.

Every Iowa ZIP prefix and the region it covers →

Area codes covering Williams

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 occupies.

Williams Iowa area codes in full →

Where Williams's ZIP codes sit

Each point is one Williams ZIP code, plotted from its record coordinates.
  • Reference points and footprint
  • Not an official NANPA boundary
  • Not a USPS delivery area

Cities near Williams

The closest places to Williams with their own ZIP code list, nearest first.
CityDistanceZIP codes
Blairsburg Iowa ZIP codes5.2 mi1 ZIP code
Alden Iowa ZIP codes8.3 mi1 ZIP code
Popejoy Iowa ZIP codes9.2 mi1 ZIP code
Buckeye Iowa ZIP codes9.7 mi1 ZIP code
Kamrar Iowa ZIP codes12 mi1 ZIP code
Dows Iowa ZIP codes12 mi1 ZIP code
Ellsworth Iowa ZIP codes13 mi1 ZIP code
Radcliffe Iowa ZIP codes13 mi1 ZIP code

Straight-line distance between place reference points, not driving distance.