Mahaska County, Iowa ZIP Codes

9 ZIP Codes

Zip Code
City
Population ↓
52577Oskaloosa14,585
50207New Sharon2,325
52561Fremont1,112
52586Rose Hill600
52595University Park545
52543Cedar541
50143Leighton538
52534Beacon321
50027Barnes City148

Overview of ZIP Codes in Mahaska 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.
9
ZIP Codes

The data shown reflect ZCTAs from the US Census. As of 2025, there are 9 ZCTAs in Mahaska County, Iowa (US Census).

Sources

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

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