O'Fallon, Missouri Population 2023

94,913

O'Fallon is a city located in Missouri. With a 2023 population of 94,913, it is the 7th largest city in Missouri and the 379th largest city in the United States.O'Fallon is currently growing at a rate of 1.28% annually and its population has increased by 3.94% since the most recent census, which recorded a population of 91,316 in 2020. Spanning over 30 miles, O'Fallon has a population density of 3,187 people per square mile.

The average household income in O'Fallon is $108,521 with a poverty rate of 5.79%. The median rental costs in recent years comes to - per month, and the median house value is -. The median age in O'Fallon is 37.5 years, 35.7 years for males, and 39.5 years for females.

O'Fallon Demographics

According to the most recent ACS, the racial composition of O'Fallon was:

  • White: 87.82%
  • Black or African American: 4.81%
  • Asian: 3.78%
  • Two or more races: 2.84%
  • Other race: 0.65%
  • Native American: 0.07%
  • Native Hawaiian or Pacific Islander: 0.04%
The current population of O'Fallon, Missouri is 94,913 based on our projections of the latest US Census estimates.The last official US Census in 2020 recorded the population at 91,316.

O'Fallon, Missouri Population 2023

Population by Race

White

Black or African American

Asian

Two or more races

Other race

Native American

Native Hawaiian or Pacific Islander

O'Fallon Population by Race

O'Fallon Population Pyramid 2023

O'Fallon Median Age

37.5

Total

35.7

Male

39.5

Female

O'Fallon Adults

There are 64,922 adults, (10,562 of whom are seniors) in O'Fallon.

O'Fallon Age Dependency

62.1

Age Dependency Ratio

19.4

Old Age Dependency Ratio

42.7

Child Dependency Ratio

O'Fallon Sex Ratio

Female44,66550.68%
Male43,46749.32%

O'Fallon Population by Age

O'Fallon Renter vs Owner Occupied by Household Type

3.2

Average Family Size

2.77

Average Household Size

82.7%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

O'Fallon Households and Families

Male

Female

Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

O'Fallon Educational Attainment by Sex (over 25)

O'Fallon Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

The highest rate of high school graduation is among islander people with a rate of 100%.

The highest rate of bachelors degrees is among asian people with a rate of 65.91%.

O'Fallon Educational Attainment by Race

All

Male

Female

$53,070

Average Earnings

$65,199

Average Male

$41,851

Average Female

O'Fallon Earnings by Educational Attainment

O'Fallon Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

O'Fallon Language

94.22% of O'Fallon residents speak only English, while 5.78% speak other languages. The non-English language spoken by the largest group is Asian and Pacific Island languages, which is spoken by 2.99% of the population.

O'Fallon Language

O'Fallon Poverty by Race

rate

5.79%

Overall Poverty Rate

3.78%

Male Poverty Rate

5.36%

Female Poverty Rate

Poverty in O'Fallon

The race most likely to be in poverty in O'Fallon is Multiple, with 32.31% below the poverty level.

The race least likely to be in poverty in O'Fallon is White, with 4.41% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 0.65%. Among those working part-time, it was 8.79%, and for those that did not work, the poverty rate was 8.7%.

O'Fallon Poverty

O'Fallon Poverty Rate by Education

O'Fallon Poverty Rate by Employment Status and Sex

O'Fallon Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

mean

median

Income by Household Type

O'Fallon Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

57.9%

Overall Marriage Rate

60.0%

Male Marriage Rate

55.9%

Female Marriage Rate

O'Fallon Married by Age and Sex

male

female

O'Fallon Marriage

The age group where males are most likely to be married is Over 65, while the female age group most likely to be married is 35-44.

O'Fallon Marital Status by Race

Married

Widowed

Divorced

Separated

NeverMarried

O'Fallon Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

4,422

Number of Veterans

4,186

Male Veterans

236

Female Veterans

O'Fallon Veterans by War

O'Fallon Veterans by Age

count

O'Fallon Veterans by Race

O'Fallon Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

3.05%

Veteran Poverty Rate

25.96%

Veteran Disability Rate

O'Fallon Veterans by Education

LaborForceParticipation

72.9%

Labor Force Participation

70.6%

Employment Rate

3%

Unemployment Rate

O'Fallon Employment by Age

LaborForceParticipation

O'Fallon Employment by Race

LaborForceParticipation

O'Fallon Employment by Education

Origin of Non-Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

67.22%

Born in O'Fallon

92.14%

Native Born

4.37%

Foreign Born

1.85%

Non Citizen

2.52%

Naturalized

Place of Birth

92.14% of O'Fallon residents were born in the United States, with 67.22% having been born in Missouri. 1.85% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.

O'Fallon Place of Birth

Note: data after 2020 is projected based on recent growth

O'Fallon Population by Year