Fremont County, Iowa ZIP Codes

Zip Code
City
Population ↓
51652Sidney1,569
51653Tabor1,446
51640Hamburg1,381
51639Farragut919
51645Imogene419
51649Randolph346
51654Thurman325
51648Percival257
51650Riverton197

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

Sources

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

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