O'Fallon Flag

O'Fallon

County Seat:
No
Area (mi²):
10.884
State:
Missouri

O'Fallon is located in St. Charles County, Missouri. O'Fallon has a 2025 population of 30,679 . O'Fallon is currently declining at a rate of 0% annually and its population has decreased by 0% since the most recent census, which recorded a population of 0 in 2020.

The average household income in O'Fallon is $99,147 with a poverty rate of 7.42%. The median age in O'Fallon is 42 years: 39.4 years for males, and 44.4 years for females. For every 100 females there are 91.7 males.

30.7K
Total Population
2,819
Density (mi²)

O'Fallon Population

O'Fallon Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of O'Fallon includes 86.62% White, 3.42% Black or African American, and smaller percentages for Asian, other race, Native American and multiracial populations.

Population by Race

White (86.62%)

Two or more races (7.17%)

Black or African American (3.42%)

Asian (1.61%)

Other race (1.08%)

Native American (0.1%)

Race
Population
Percentage (of total)
White26,57386.62%
Two or more races2,2007.17%
Black or African American1,0503.42%
Asian4941.61%
Other race3301.08%
Native American320.1%

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 $51,066. Household income levels show a median of $81,333. The poverty rate stands at 7.42%.

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$116,641-
Families$102,553$116,679
Households$81,333$99,147
Non Families$46,647$57,288

$51,066

Average Income

$81,333

Median Household Income

7.42%

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)