Oswego, Illinois

1 ZIP code · Central time

ZIP codes (largest first)

60543 · 43,047
Population36,375
StateIllinois
CountyKendall County
Time zoneCentral
Land area15.83 sq mi

Area codes in this area

779815

These are the area codes that most often serve Oswego (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 Oswego

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