Arnold, Missouri

1 ZIP code · Central time

ZIP codes (largest first)

63010 · 34,478
Population20,956
StateMissouri
CountyJefferson County
Time zoneCentral
Land area11.53 sq mi

Area codes in this area

636

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

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