Mason County, Illinois ZIP Codes

8 ZIP Codes

Zip Code
City
Population ↓
62644Havana4,615
62664Mason City2,922
62682San Jose684
62633Easton638
62655Kilbourne594
62617Bath524
61567Topeka411
61532Forest City347

Overview of ZIP Codes in Mason 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 Mason County, Illinois (US Census).

Sources

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

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