O Fallon, MO ZIP Codes

Total ZIPs

89,535

Total Population

ZIP Codes in O Fallon, MO

ZIP Code	Population	Density	Timezone
63366	46,175	259	America/Chicago
63368	43,360	1,016	America/Chicago

All data sourced from the U.S. Census Bureau, American Community Survey (ACS) 5-Year Estimates (2023).

PlainZIP is not affiliated with the U.S. Census Bureau or any government agency.