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ZIP Code Database - Facts & Stats

Data Last Updated: March 1, 2023

ZIP Codes for City of Irwin, IA

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Counties:SHELBY, IA
Area Code(s):712
Timezone(s):Central (GMT -06:00)
City Population:341 (More Details)
Congressional District(s):04
Land Area:591 square miles (county)
Water Area:1 square miles (county)

1 ZIP Code

Irwin, IA ZIP Code Boundaries

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Irwin, IA Covers 1 ZIP Code

ZIP CodeTypePopulation% of PopulationAliases

Irwin, IA Demographic Information *

Total population**341
Male population161
Female population180
Median age (years)52.3
White Population337
Black Population0
Indian Population0
Asian Population0
Hawaiian Population0
Hispanic Population4
Median age (Male)52.6
Median age (Female)52.1
Total households165
Family households (families)97
Average household size2.07
Average family size2.71
Total housing units185
* Demographic data is based on 2010 Census for the City of IRWIN.
** 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],