Fremont County, Idaho ZIP Codes

6 ZIP Codes

Zip Code
City
Population ↓
83445Saint Anthony7,975
83420Ashton2,580
83429Island Park628
83438Parker327
83421Chester220
83433Macks Inn36

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.
6
ZIP Codes

The data shown reflect ZCTAs from the US Census. As of 2025, there are 6 ZCTAs in Fremont County, Idaho (US Census).

Sources

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

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