Ofallon

County:: St. Charles County
County Seat:: No
Area (mi²):: 30.525
State:: Missouri

O'Fallon is a city located in St. Charles County, Missouri. O'Fallon has a 2025 population of 95,709. O'Fallon is currently growing at a rate of 0.86% annually and its population has increased by 4.46% since the most recent census, which recorded a population of 91,621 in 2020.

The average household income in O'Fallon is $124,267 with a poverty rate of 4.7%. The median age in O'Fallon is 38.2 years: 37.2 years for males, and 39.3 years for females.

Demographics

The racial composition of O'Fallon includes 82.54% White, 5.11% Black or African American, 4.2% Asian, and smaller percentages for other race, Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Two or more races

Black or African American

Asian

Other race

Native American

Native Hawaiian or Pacific Islander

Race	Population	Percentage (of total)
White	76,514	82.54%
Two or more races	6,317	6.81%
Black or African American	4,735	5.11%
Asian	3,894	4.2%
Other race	1,133	1.22%
Native American	64	0.07%
Native Hawaiian or Pacific Islander	40	0.04%

O'Fallon Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

O'Fallon's average per capita income is $64,079. Household income levels show a median of $107,203. The poverty rate stands at 4.7%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.

Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.

Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.

Name	Median	Mean
Married Families	$137,655	-
Families	$125,856	$141,422
Households	$107,203	$124,267
Non Families	$59,661	$73,754

$64,079

Average Income

$107,203

Median Household Income

4.7%

Poverty Rate