Richland County, Illinois ZIP Codes

Zip Code
City
Population ↓
62450Olney12,327
62868Noble1,463
62425Dundas838
62452Parkersburg387
62421Claremont366
62419Calhoun352

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

Sources

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

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