Lyon County, Iowa ZIP Codes

8 ZIP Codes

Zip Code
City
Population ↓
51246Rock Rapids4,041
51241Larchwood2,103
51240Inwood1,914
51237George1,605
51235Doon1,007
51243Little Rock735
51230Alvord478
51242Lester379

Overview of ZIP Codes in Lyon 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.
8
ZIP Codes

The data shown reflect ZCTAs from the US Census. As of 2025, there are 8 ZCTAs in Lyon County, Iowa (US Census).

Sources

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

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