There are 9 zip codes in Marshall County, Illinois. The most populated is 61540, located in Lacon. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
615402,771Lacon
615372,727Henry
615701,663Washburn
613771,469Wenona
615651,433Sparland
613691,393Toluca
613751,163Varna
6154199La Rose
6142434Camp Grove
showing: 9 rows

Zip Codes in Marshall County, Illinois by Population (2024)