Cost of Living in O'Fallon, Illinois
O'Fallon has a population of about 32,262. The median household income is $105,982, median gross rent is $1,332/month, and the median home value is $295,700. These figures come from 2020-2024 ACS 5-Year estimates, the latest full-coverage Census baseline for U.S. cities.
How current is this? Census city data is released with a lag because it is survey-based and designed for consistent coverage across small and large places. Use it as an official affordability baseline; current apartment listings and mortgage rates may differ.
Is O'Fallon expensive to live in?
Compared with the national median in this dataset, rent in O'Fallon is 20% below the national median and home values are 21% below the national median. Household income here is 26% above the national median. Monthly rent represents roughly 15% of the median annual household income, a rough affordability signal for renters.
Frequently asked questions
What is the average rent in O'Fallon?
The median gross rent in O'Fallon, Illinois is $1,332 per month in the 2020-2024 ACS 5-Year estimates.
What is the median home price in O'Fallon?
The median owner-occupied home value in O'Fallon is $295,700 in the 2020-2024 ACS 5-Year estimates.
How much do people earn in O'Fallon?
The median household income in O'Fallon is $105,982 per year in the 2020-2024 ACS 5-Year estimates.
Data source: U.S. Census Bureau, 2020-2024 ACS 5-Year Estimates. Local database last refreshed 2026-07-11.