O'Fallon, Missouri Population 2020

90,684

O'Fallon is a city located in Missouri. With a 2020 population of 90,684, it is the 7th largest city in Missouri and the 373rd largest city in the United States. O'Fallon is currently growing at a rate of 1.23% annually and its population has increased by 14.31% since the most recent census, which recorded a population of 79,329 in 2010. Spanning over 30 miles, O'Fallon has a population density of 3,045 people per square mile.

The average household income in O'Fallon is $104,195 with a poverty rate of 4.76%. The median rental costs in recent years comes to $1,090 per month, and the median house value is $217,000. The median age in O'Fallon is 36.5 years, 35.1 years for males, and 38.1 years for females. For every 100 females there are 97.3 males.

O'Fallon Demographics

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

  • White: 88.96%
  • Black or African American: 4.73%
  • Asian: 3.60%
  • Two or more races: 2.20%
  • Other race: 0.39%
  • Native American: 0.13%
  • Native Hawaiian or Pacific Islander: 0.00%
The current population of O'Fallon, Missouri is 90,684, based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 88,472.The last official US Census in 2010 recorded the population at 79,329.

O'Fallon, Missouri Population 2020

Population by Race

Race Population Percentage
White76,80888.96%
Black or African American4,0864.73%
Asian3,1093.60%
Two or More Races1,8962.20%
Some Other Race3330.39%
American Indian and Alaska Native1080.13%

O'Fallon Population Pyramid 2020

O'Fallon Median Age

36.5


Total

35.1


Male

38.1


Female

O'Fallon Adults

There are 62,492 adults, (9,745 of whom are seniors) in O'Fallon.

O'Fallon Age Dependency

63.7

Age Dependency Ratio

18.5

Old Age Dependency Ratio

45.2

Child Dependency Ratio

O'Fallon Sex Ratio

Female

43,767

50.69%

Male

42,573

49.31%

O'Fallon Households and Families

O'Fallon Renter vs Owner Occupied by Household Type

O'Fallon Household Types

Type Owner Renter
Married91.9%8.1%
Male85.4%14.6%
All82.2%17.8%
Female65.5%34.5%
Non Family65.3%34.7%

82.2%

Rate of Home Ownership

Type Count Average Size Owned
All30,7662.7982.2
Married18,6063.3491.9
Non Family7,4011.2265.3
Female3,4583.1465.5
Male1,3012.9885.4

3.23

Average Family Size

2.79

Average Household Size

4.6%

Unmarried (Opposite Sex)

0.4%

Unmarried (Same Sex)

O'Fallon Education

Education Attained Count Percentage
Less Than 9th Grade4510.80%
9th to 12th Grade1,6322.91%
High School Graduate13,29323.66%
Some College13,13723.39%
Associates Degree4,6518.28%
Bachelors Degree14,47525.77%
Graduate Degree8,53815.20%

O'Fallon Educational Attainment by Race

Name Total High School Bachelors
White49,57847,79219,435
Black2,6812,5931,444
Asian2,0541,9601,549
Hispanic1,2031,105440
Multiple Races710693189
Other Race1761268
Native American10810830

The highest rate of high school graduation is among native american people with a rate of 100.00%.

The highest rate of bachelors degrees is among asian people with a rate of 75.41%.

Name Average Male Female
Overall$51,014$64,077$40,168
Less Than High School$27,000$37,963$20,631
High School Grad$36,126$47,192$27,330
Some College$45,150$54,261$33,358
Bachelors Degree$62,942$84,492$47,516
Graduate Degree$74,692$94,111$58,839

$51,014

Average Earnings

$64,077

Average Male

$40,168

Average Female

O'Fallon Language

O'Fallon Language by Age

O'Fallon Language

94.27% of O'Fallon residents speak only English, while 5.73% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 2.00% of the population.

O'Fallon Poverty

O'Fallon Poverty by Race

Name Total In Poverty Poverty Rate
White74,3752,8993.90%
Black4,07247711.71%
Multiple1,89642122.20%
Hispanic2,3202289.83%
Other3277924.16%
Asian3,109551.77%
Native10843.70%

4.76%

Overall Poverty Rate

3.88%

Male Poverty Rate

5.63%

Female Poverty Rate

Poverty in O'Fallon

The race most likely to be in poverty in O'Fallon is Other, with 24.16% below the poverty level.

The race least likely to be in poverty in O'Fallon is Asian, with 1.77% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.01%. Among those working part-time, it was 7.62%, and for those that did not work, the poverty rate was 9.29%.

Name Poverty
Less Than High School13.08%
High School4.78%
Some College4.47%
Bachelors or Greater1.27%
Name Poverty
Female Unemployed23.10%
Male Unemployed15.96%
Female Employed3.62%
Male Employed1.21%

O'Fallon Income

O'Fallon Income by Household Type

Name Median Mean
Households$87,238$104,195
Families$101,722$116,792
Married Families$114,592-
Non Families$45,300$58,965

O'Fallon Marital Status

O'Fallon Marital Status

Marriage Rates

57.7%

Overall Marriage Rate

59.9%

Male Marriage Rate

55.6%

Female Marriage Rate

O'Fallon Married by Age and Sex

O'Fallon Marriage

The age group where males are most likely to be married is 45-54, while the female age group most likely to be married is 45-54.

O'Fallon Marital Status by Race

O'Fallon Veterans

4,865

Number of Veterans

4,577

Male Veterans

288

Female Veterans

War Veterans
Vietnam1,602
First Gulf War974
Second Gulf War863
Korea407
World War II185
Name Veterans % of Total
White4,4897.98%
Black32311.16%
Hispanic645.01%
2 or More272.95%
Other157.89%
Asian110.53%

$O'Fallon Veterans by Education

2.19%

Veteran Poverty Rate

27.67%

Veteran Disability Rate

O'Fallon Employment Status

73.6%

Labor Force Participation

71.1%

Employment Rate

3.2%

Unemployment Rate

O'Fallon Place of Birth

Origin of Non-Citizens

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

Origin of Naturalized Citizens

70.02%

Born in Missouri

95.85%

Native Born

4.15%

Foreign Born

2.26%

Non Citizen

Place of Birth

95.85% of O'Fallon residents were born in the United States, with 70.02% having been born in Missouri. 2.26% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.

Year Population Growth Annual Growth Rate
202090,6841,1061.23%
201989,5781,1061.25%
201888,4729281.06%
201787,5441,1061.28%
201686,4381,4011.65%
201585,0378671.03%
201484,1701,0991.32%
201383,0711,0151.24%
201282,0569681.19%
201181,0881,2231.53%
201079,86533,6965.63%
200046,16927,4719.46%
199018,69810,0217.98%
19808,6771,6592.14%
19707,0183,2486.41%
19603,7703,1709.62%
19406000.00%