There are 16 zip codes in Macon County, Illinois. The most populated is 62521, located in Decatur. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
City
Population
62521Decatur33,453
62526Decatur30,572
62522Decatur15,010
62549Mt Zion6,684
62535Forsyth3,856
61756Maroa2,564
62501Argenta2,242
62554Oreana1,727
62544Macon1,600
62573Warrensburg1,319
61925Dalton City1,054
62551Niantic924
62523Decatur800
62514Boody380
62537Harristown329
62532Elwin64

Macon County, Illinois Zip Codes by Population (2024)