Mount Vernon, Illinois

1 ZIP code · Central time

ZIP codes (largest first)

62864 · 22,779
Population14,090
StateIllinois
CountyJefferson County
Time zoneCentral
Land area14.66 sq mi

Area codes in this area

618730

These are the area codes that most often serve Mount Vernon (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 Mount Vernon

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