There are 6 zip codes in Cass County, Illinois. The most populated is 62618, located in Beardstown. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
City
Population
62618Beardstown7,318
62691Virginia2,355
62612Ashland1,482
62611Arenzville1,114
62627Chandlerville1,023
62622Bluff Springs90

Cass County, Illinois Zip Codes by Population (2024)