Clay County, Iowa ZIP Codes

10 ZIP Codes

Zip Code
City
Population ↓
51301Spencer12,638
51357Royal910
51338Everly852
51047Peterson693
51033Linn Grove421
51333Dickens374
51366Webb245
51343Greenville172
51340Fostoria75
51341Gillett Grove40

Overview of ZIP Codes in Clay 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.
10
ZIP Codes

The data shown reflect ZCTAs from the US Census. As of 2025, there are 10 ZCTAs in Clay County, Iowa (US Census).

Sources

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

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