Butler County, Iowa ZIP Codes

11 ZIP Codes

Zip Code
City
Population ↓
50665Parkersburg2,693
50670Shell Rock2,270
50636Greene2,186
50619Clarksville2,150
50604Aplington1,590
50602Allison1,254
50660New Hartford1,143
50625Dumont930
50611Bristow364
50608Austinville24
50649Kesley12

Overview of ZIP Codes in Butler 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.
11
ZIP Codes

The data shown reflect ZCTAs from the US Census. As of 2025, there are 11 ZCTAs in Butler County, Iowa (US Census).

Sources

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

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