|Year||Population||Rank in US||Growth Rate|
Based on the latest 2022 data from the US census, the current population of O'Fallon is 32,292. O'Fallon, Illinois is the 1,220th largest city in the US.
O'Fallon is located entirely in St Clair County.
The peak population of O'Fallon was in 2020, when its population was 32,334. In 2020, O'Fallon was the 1,219th largest city in the US; now its fallen to the 1,220th largest city in the US. O'Fallon is currently 0.1% smaller than it was in 2020.
O'Fallon has grown 44.9% since the 2000. O'Fallon, Illinois is growing moderately quickly; it is growing faster than 79% of similarly sized cities since 2000.
O'Fallon has a population density of 1,970.3 people per square mile.
|1229||Elk Grove Village||32,066||-7.7%|
|1215||Foster City, California||32,517||12.9%|
|1216||Menlo Park, California||32,475||5.5%|
|1217||Garfield, New Jersey||32,469||9.0%|
|1218||Bay City, Michigan||32,404||-11.7%|
|1219||Long Branch, New Jersey||32,383||3.0%|
|1224||Bluffton, South Carolina||32,191||1300.8%|
The total voting age population of O'Fallon, Illinois, meaning US citizens 18 or older, is 20,861. The voting age population is 48.2% male and 51.8% female.
According to the latest census statistics, 11.8% of the residents of O'Fallon are 65 or older.
The racial demographics of O'Fallon are 79.5% White, 11.8% Black, 4.1% Two or more races, 3.1% Asian, 1.4% Other and 0.1% American Indian. Additionally, 5.0% of the population identifies as Hispanic.
In O'Fallon, 4.3% of residents have an income below the poverty line, and the child poverty rate is 4.3%. On a per-household basis, 3.5% of families are below the poverty line in O'Fallon.
Among those aged 16 and older, 69.2% of O'Fallon residents are in the labor force.
Among the adult population 25 years old and over, 96.9% of O'Fallon residents have at least a high school degree or equivalent, 47.8% have a bachelor's degree and 22.5% have a graduate or professional degree.
Among O'Fallon residents aged 5 and older, 7.1% of them speak a non-English language at home. Broken down by language: 2.5% of residents speak Spanish at home, 1.9% speak an Indo-European language, and 2.0% speak an Asian language.
The unemployment rate in O'Fallon is 4.5%, which is calculated among residents aged 16 or older who are in the labor force.
In O'Fallon, 17.1% of the residents in the non-military labor force are employed by the local, state and federal government.
The median household income in O'Fallon is $90,349.
In O'Fallon, 69.2% of housing units are occupied by their owners.
Renters occupy 30.8% of housing units in O'Fallon.
Of all the housing units in O'Fallon, 5.5% of them were build before 1940.
In O'Fallon, 32.9% of the total housing units were built after the year 2000, which is approximately 3,800 units.
The median gross monthly rent payment for renters in O'Fallon is $1,066.
In O'Fallon, 90.5% of households have an active broadband internet connection.