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Grinnell Iowa ZIP Codes

Grinnell holds a single ZIP code.

Every ZIP code in Grinnell

The complete list of Grinnell, Iowa ZIP codes with the county each falls in.
ZIP codeCounty
50112Poweshiek 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Grinnell codes above are listed without a column we would have to invent.

Scope every ZIP code recorded for Grinnell. 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 Grinnell ZIP code begins 501. Those first three digits identify the sectional center facility that processes mail for this part of Iowa. Statewide that range covers 69 ZIP codes, so Grinnell accounts for 1% of it.

Every Iowa ZIP prefix and the region it covers →

Area codes covering Grinnell

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 Grinnell occupies.

Grinnell Iowa area codes in full →

Where Grinnell's ZIP codes sit

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

Cities near Grinnell

The closest places to Grinnell with their own ZIP code list, nearest first.
CityDistanceZIP codes
Malcom Iowa ZIP codes9.0 mi1 ZIP code
Kellogg Iowa ZIP codes9.5 mi1 ZIP code
Gilman Iowa ZIP codes10 mi1 ZIP code
Searsboro Iowa ZIP codes11 mi1 ZIP code
Lynnville Iowa ZIP codes12 mi1 ZIP code
Sully Iowa ZIP codes13 mi1 ZIP code
Brooklyn Iowa ZIP codes14 mi1 ZIP code
Laurel Iowa ZIP codes15 mi1 ZIP code

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