Cost of Living in O'Fallon, IL
For one person, living costs in O'Fallon, IL are estimated at $2,591 a month, including rent and utilities, which take more than half of the total. Other living expenses average about $35 a day.
How much you'll spend in O'Fallon, IL
Real prices from locals and on-the-ground checks – rent, groceries, transit and the daily extras. Here's what a month in O'Fallon, IL actually costs, broken down by who's living it.
A single person spends around $2,591 per month with rent, or $1,054 for everyday expenses alone.
A couple spends around $3,785 per month with rent, or $1,812 for everyday expenses alone.
A family of three spends around $4,980 per month with rent, or $2,570 without housing.
CityCost data is based on AI and user input – minor inaccuracies may occur.
Last update: October 19, 2026
Categories marked with * are only partly priced – their share counts the items that do have prices.
Categories marked with * are only partly priced – their share counts the items that do have prices.
Cost Breakdown
Groceries cost around $456 per month for one person. A mid-range dinner for two is priced at $74.0.
Cost Highlights
Chicken fillets is more expensive than 90% of cities in North America
Local beer is more expensive than 90% of cities in North America
- O'Fallon, IL
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