O'Fallon, MO ZIP codes

6 ZIP/ZCTAs intersecting this Census place in St. Charles County.

ACS 2023 population

92,697

Median household income

$107,203

Median home value

$305,100

U.S. Census Bureau, ACS 2019–2023 5-year (vintage 2023). Geography: Census place O'Fallon (GEOID 2954074). Methodology

Combined population of ZIP/ZCTAs intersecting this place: 296,889 (6 ZIPs).

Combined population of ZIP/ZCTAs intersecting this place. Each intersecting ZIP contributes its full ZCTA population; overlap percents are descriptive only. This is not the Census place ACS headline above. Methodology

Map of O'Fallon, MO

Census place boundary and intersecting ZIP Code Tabulation Areas for O'Fallon, MO — Census place boundary for O'Fallon, MO. Intersecting ZCTAs may extend past the city limit. Not a USPS city limit. Boundaries: U.S. Census Bureau. Methodology · Data sources

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ZIP/ZCTA overlap with O'Fallon

Population overlap

Share of each ZIP/ZCTA’s population located within O'Fallon, based on ZIP Code Database place-overlap data. This is a population measure, not land-area overlap or the Census-place population.

633044.0%
6336678.2%
6336726.3%
6336866.9%
6337611.8%
633851.3%

ZIP Code Database place-overlap table, field percent_of_zip_population_in_place, keyed by place_geoid. Not ACS 2019–2023. Overlap vintage is the shipped overlap table and is separate from ACS. Methodology

ZIP codes intersecting O'Fallon

ZIP	City	County	Population	Income
63304	Saint Charles	St. Charles County	43,389	$114,124
63366	O Fallon	St. Charles County	54,449	$98,237
63367	Lake Saint Louis	St. Charles County	27,893	$134,932
63368	O Fallon	St. Charles County	45,862	$118,811
63376	Saint Peters	St. Charles County	74,876	$94,921
63385	Wentzville	St. Charles County	50,420	$111,851