Cass County, Iowa ZIP Codes

Zip Code
City
Population ↓
50022Atlantic8,526
51535Griswold1,697
50020Anita1,197
51544Lewis793
50853Massena716
50843Cumberland540
50274Wiota234
51552Marne169

Overview of ZIP Codes in Cass County

ZCTAs are geographic areas created by the US Census Bureau to approximate the delivery areas of ZIP Codes for statistical analysis. While ZCTAs use the same five-digit codes as ZIP Codes, they represent defined geographic areas that may not exactly match the mail delivery routes of ZIP Codes.
8
ZIP Codes

The data shown reflect ZCTAs from the US Census. As of 2025, there are 8 ZCTAs in Cass County, Iowa (US Census).

Sources

  1. US Census: 2025 Gazetteer Files
  2. US Census: ZIP Code Tabulation Areas (ZCTAs)

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