Frankfort, Illinois

1 ZIP code · Central time

ZIP codes (largest first)

60423 · 32,836
Population20,651
StateIllinois
CountyWill County
Time zoneCentral
Land area15.62 sq mi

Area codes in this area

779815

These are the area codes that most often serve Frankfort (including overlays). The exact area code depends on the phone number — landlines, mobiles and overlays can differ even on the same street.

Find the ZIP+4 for an address in Frankfort

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Population: U.S. Census Bureau, ACS 5-year estimates, 2024.