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ZIP Code Database - Facts & Stats

Data Last Updated: March 1, 2023

ZIP Codes for City of Grinnell, IA

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Area Code(s):641
Timezone(s):Central (GMT -06:00)
City Population:9,218 (More Details)
Congressional District(s):01, 02
Land Area:585 square miles (county)
Water Area:1 square miles (county)

1 ZIP Code

Grinnell, IA ZIP Code Boundaries

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Grinnell, IA Covers 1 ZIP Code

ZIP CodeTypePopulation% of PopulationAliases
50112Standard11,536100.00%NEWBURG, OAKLAND ACRES

Grinnell, IA Demographic Information *

Total population**9,218
Male population4,361
Female population4,857
Median age (years)35.6
White Population8,468
Black Population182
Indian Population30
Asian Population246
Hawaiian Population21
Hispanic Population292
Median age (Male)32.9
Median age (Female)38.1
Total households3,567
Family households (families)2,026
Average household size2.16
Average family size2.82
Total housing units3,844
* Demographic data is based on 2010 Census for the City of GRINNELL.
** City and ZIP Code Population will not be equal due to differences in their geographies.


  1. U.S. Postal Service [Last Updated: 2/1/2023],
  2. Internal Data Creation [Last Updated: 2/1/2023],
  3. U.S. Geological Survey [Updated as needed],
  4. U.S. Census [Updated Yearly],
  5. U.S. Census 2010 [Decennial] [Last Updated: 1/1/2010],