O'Fallon, IL
Demographics And Statistics

Demographics | Crime | Cost Of Living
Updated: 2025-10-25

Living In O'Fallon, Illinois Summary

Life in O'Fallon research summary. HomeSnacks has been using Saturday Night Science to research the quality of life in O'Fallon over the past nine years using Census, FBI, Zillow, and other primary data sources. Based on the most recently available data, we found the following about life in O'Fallon:

  • The population in O'Fallon is 32,139.

  • The median home value in O'Fallon is $308,698.

  • The median income in O'Fallon is $102,793.

  • The cost of living in O'Fallon is 102 which is 1.0x higher than the national average.

  • The median rent in O'Fallon is $1,312.

  • The unemployment rate in O'Fallon is 3.3%.

  • The poverty rate in O'Fallon is 4.4%.

  • The average high in O'Fallon is 65.8° and the average low is 45.9°.

O'fallon SnackAbility

7
Overall SnackAbility
Jobs
8.5/10
Housing
8
Affordability
8.5
Diversity
8
Safety
8
Amenities
8.5
Education
9.5
Commute
7

O'fallon, IL Crime Report

Crime in O'Fallon summary. We use data from the FBI to determine the crime rates in O'Fallon. Key points include:

  • There were 387 total crimes in O'Fallon in the last reporting year.

  • The overall crime rate per 100,000 people in O'Fallon is 1,214.8 / 100k people.

  • The violent crime rate per 100,000 people in O'Fallon is 194.6 / 100k people.

  • The property crime rate per 100,000 people in O'Fallon is 1,020.2 / 100k people.

  • Overall, crime in O'Fallon is -42.68% below the national average.

387
Total Crimes
-42.68%
Below National Average

Crime In O'Fallon Comparison Table

Statistic Count
Raw
O'Fallon
/ 100k People
Illinois
/ 100k People
National
/ 100k People
Total Crimes Per 100K 387 1,214.8 2,004.4 2,119.2
Violent Crime 62 194.6 289.2 359.0
Murder 1 3.1 5.8 5.0
Robbery 4 12.6 90.2 61.0
Aggravated Assault 47 147.5 146.3 256.0
Property Crime 325 1,020.2 1,715.2 1,760.0
Burglary 58 182.1 290.5 229.0
Larceny 216 678.1 1,134.4 1,272.0
Car Theft 51 160.1 290.4 259.0

O'fallon, IL Cost Of Living

Cost of living in O'Fallon summary. We use data on the cost of living to determine how expensive it is to live in O'Fallon. Real estate prices drive most of the variance in cost of living around Illinois. Key points include:

  • The cost of living in O'Fallon is 102 with 100 being average.

  • The cost of living in O'Fallon is 1.0x higher than the national average.

  • The median home value in O'Fallon is $308,698.

  • The median income in O'Fallon is $102,793.

102
O'fallon's Overall Cost Of Living
1.0x
Higher Than The National Average

Cost Of Living In O'Fallon Comparison Table

Living Expense O'Fallon Illinois National Average
Overall 102 97 100
Services 93 95 100
Groceries 98 99 100
Health 91 93 100
Housing 118 95 100
Transportation 95 102 100
Utilities 102 91 100

O'fallon, IL Weather

  • The average high in O'Fallon is 65.8° and the average low is 45.9°.

  • There are 69.2 days of precipitation each year.

  • Expect an average of 41.2 inches of precipitation each year with 12.5 inches of snow.

StatO'Fallon
Average Annual High65.8
Average Annual Low45.9
Annual Precipitation Days69.2
Average Annual Precipitation41.2
Average Annual Snowfall12.5
65.8°
Average High
69.2
Days of Rain

O'fallon, IL Photos

Caboose
Source: Wikipedia
Alertronic High Powered Voice Siren
Source: Wikipedia
Greaterstl
Source: Wikipedia
Tornado Damagec Illinois
Source: Wikipedia
Rock Springs Nature Centerc Ofallonc Illinois
Source: Wikipedia
Ofallon Public Library
Source: Wikipedia
Moye Elementary School
Source: Wikipedia
Clown At The Mayfest Parade Ofallonc Illinois
Source: Wikipedia

Rankings for O'Fallon in Illinois

Locations Around O'Fallon

Map Of O'Fallon, IL

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O'Fallon Demographics And Statistics

Population over time in O'Fallon

The current population in O'Fallon is 32,139. The population has increased 18.8% from 2010.

Year Population % Change
2023 32,139 0.1%
2022 32,104 0.4%
2021 31,963 8.4%
2020 29,487 0.5%
2019 29,333 0.2%
2018 29,277 0.6%
2017 29,095 0.1%
2016 29,078 -0.2%
2015 29,144 0.2%
2014 29,100 0.9%
2013 28,844 1.6%
2012 28,377 2.9%
2011 27,566 1.9%
2010 27,044 -

Race / Ethnicity in O'Fallon

White
70.3% (22,602)
African American
13.5% (4,342)
American Indian
0.1% (23)
Asian
2.9% (916)
Hawaiian
0.0% (0)
Other
0.3% (110)
Two Or More
6.9% (2,230)
Hispanic
6.0% (1,916)

O'Fallon is:

  • 70.3% White with 22,602 White residents.

  • 13.5% African American with 4,342 African American residents.

  • 0.1% American Indian with 23 American Indian residents.

  • 2.9% Asian with 916 Asian residents.

  • 0.0% Hawaiian with 0 Hawaiian residents.

  • 0.3% Other with 110 Other residents.

  • 6.9% Two Or More with 2,230 Two Or More residents.

  • 6.0% Hispanic with 1,916 Hispanic residents.

Race O'Fallon IL USA
White 70.3% 58.7% 58.2%
African American 13.5% 13.6% 12.0%
American Indian 0.1% 0.1% 0.5%
Asian 2.9% 5.8% 5.7%
Hawaiian 0.0% 0.0% 0.2%
Other 0.3% 0.3% 0.5%
Two Or More 6.9% 3.0% 3.9%
Hispanic 6.0% 18.5% 19.0%

Gender in O'Fallon

Female
50.6% (16,274)
Male
49.4% (15,864)
  • O'Fallon is 50.6% female with 16,274 female residents.

  • O'Fallon is 49.4% male with 15,864 male residents.

Gender O'Fallon IL USA
Female 50.6% 50.6% 50.5%
Male 49.4% 49.4% 49.5%

Highest level of educational attainment in O'Fallon for adults over 25

  • 2.0% of adults in O'Fallon completed < 9th grade.

  • 1.0% of adults in O'Fallon completed 9-12th grade.

  • 15.0% of adults in O'Fallon completed high school / ged.

  • 18.0% of adults in O'Fallon completed some college.

  • 13.0% of adults in O'Fallon completed associate's degree.

  • 28.0% of adults in O'Fallon completed bachelor's degree.

  • 19.0% of adults in O'Fallon completed master's degree.

  • 3.0% of adults in O'Fallon completed professional degree.

  • 1.0% of adults in O'Fallon completed doctorate degree.

< 9th Grade
2.0% (642)
9-12th Grade
1.0% (321)
High School / GED
15.0% (4,820)
Some College
18.0% (5,785)
Associate's Degree
13.0% (4,178)
Bachelor's Degree
28.0% (8,998)
Master's Degree
19.0% (6,106)
Professional Degree
3.0% (964)
Doctorate Degree
1.0% (321)
Education O'Fallon IL USA
< 9th Grade 2.0% 5.0% 5.0%
9-12th Grade 1.0% 5.0% 6.0%
High School / GED 15.0% 25.0% 26.0%
Some College 18.0% 20.0% 19.0%
Associate's Degree 13.0% 8.0% 9.0%
Bachelor's Degree 28.0% 22.0% 21.0%
Master's Degree 19.0% 11.0% 10.0%
Professional Degree 3.0% 2.0% 2.0%
Doctorate Degree 1.0% 2.0% 2.0%

Household Income For O'Fallon, Illinois

  • 2.8% of households in O'Fallon earn Less than $10,000.

  • 1.3% of households in O'Fallon earn $10,000 to $14,999.

  • 5.5% of households in O'Fallon earn $15,000 to $24,999.

  • 3.7% of households in O'Fallon earn $25,000 to $34,999.

  • 7.3% of households in O'Fallon earn $35,000 to $49,999.

  • 16.8% of households in O'Fallon earn $50,000 to $74,999.

  • 11.1% of households in O'Fallon earn $75,000 to $99,999.

  • 19.0% of households in O'Fallon earn $100,000 to $149,999.

  • 13.6% of households in O'Fallon earn $150,000 to $199,999.

  • 18.7% of households in O'Fallon earn $200,000 or more.

Less than $10,000
2.8% (89,755)
$10,000 to $14,999
1.3% (41,008)
$15,000 to $24,999
5.5% (177,704)
$25,000 to $34,999
3.7% (119,931)
$35,000 to $49,999
7.3% (235,220)
$50,000 to $74,999
16.8% (541,109)
$75,000 to $99,999
11.1% (357,988)
$100,000 to $149,999
19.0% (610,488)
$150,000 to $199,999
13.6% (438,200)
$200,000 or more
18.7% (602,493)
Income O'Fallon IL USA
Less than $10,000 2.8% 5.2% 4.9%
$10,000 to $14,999 1.3% 3.4% 3.6%
$15,000 to $24,999 5.5% 6.2% 6.6%
$25,000 to $34,999 3.7% 6.5% 6.8%
$35,000 to $49,999 7.3% 9.9% 10.4%
$50,000 to $74,999 16.8% 15.1% 15.7%
$75,000 to $99,999 11.1% 12.7% 12.7%
$100,000 to $149,999 19.0% 17.9% 17.4%
$150,000 to $199,999 13.6% 9.9% 9.3%
$200,000 or more 18.7% 13.1% 12.6%

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