Illinois · Census place 55249
O'Fallon city, IL
Quick answer
O'Fallon city has 32,139 residents, ranking #58 of 1462 places in Illinois. Median household income is $102,793, the median home is worth $274,100 and median gross rent runs $1,312 a month.
- Population
- 32,139O'Fallon city residents
- Median household income
- $102,793Past 12 months, inflation adjusted
- Median home value
- $274,100Owner-occupied units
- Median gross rent
- $1,312Rent plus utilities, monthly
- Median age
- 36.9 yrsAll residents
- Homeownership rate
- 70.9%Owner-occupied households
What the numbers mean in O'Fallon city
Housing cost measured against local earnings.
A household earning the O'Fallon city median would spend about 15.3% of gross income on the median rent. The 30% mark is the federal threshold for cost burden, so anything above it signals a stretched rental market. The median home costs 2.7× the median household income; nationally that ratio sits near 4.5×. Poverty affects 4.4% of residents and 70.9% of households own their home.
Source: US Census Bureau, ACS 2019-2023 5-year estimates · rates as published for 2019-2023 ACS 5-year
Compare with nearby places
Places of similar size in Illinois.
- Woodridge village 33,889
- Glendale Heights village 32,864
- St. Charles city 32,733
- Elk Grove Village village 32,132
- Pekin city 31,812
- Mundelein village 31,632
- North Chicago city 30,772
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More Illinois coverage.