Poweshiek County, Iowa ZIP Codes

Zip Code
City
Population ↓
50112Grinnell11,862
52211Brooklyn2,795
50171Montezuma2,524
52222Deep River631
50157Malcom473
52221Guernsey332
50242Searsboro326
52232Hartwick277

Overview of ZIP Codes in Poweshiek 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 Poweshiek County, Iowa (US Census).

Sources

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

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