O'Fallon Flag

O'Fallon

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 96,277 . O'Fallon is currently growing at a rate of 0.97% annually and its population has increased by 5.03% since the most recent census, which recorded a population of 91,665 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. For every 100 females there are 96.7 males.

96.3K
Total Population
3,154
Density (mi²)
922 0.97%
Growth

O'Fallon Population

O'Fallon Population

Data after 2023 is projected based on recent change

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 (82.54%)

Two or more races (6.81%)

Black or African American (5.11%)

Asian (4.2%)

Other race (1.22%)

Native American (0.07%)

Native Hawaiian or Pacific Islander (0.04%)

Race
Population
Percentage (of total)
White76,51482.54%
Two or more races6,3176.81%
Black or African American4,7355.11%
Asian3,8944.2%
Other race1,1331.22%
Native American640.07%
Native Hawaiian or Pacific Islander400.04%

O'Fallon Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

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

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)