Rents are 8% below what O Fallon's 10-year trend predicts — a better deal than its own history suggests.
Rent by unit size
These are HUD Fair Market Rents, the payment standard for a Housing Choice Voucher (Section 8). They often differ from the $1,804 market median above, and that is expected: FMR is the 40th percentile of standard-quality units and counts gross rent, so it includes essential utilities such as electricity, water, gas, sewer, and trash. The market median is asking rent, which usually excludes utilities. HUD sets FMR once a year; market rent here updates monthly.
Source: HUD Small Area Fair Market Rents. Read the methodology →
12-month history
Last updated: August 17, 2026
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Who lives here
O Fallon, MO is majority owner-occupied, 43.3% of residents hold a bachelor's degree or higher.
Source: U.S. Census Bureau · ACS 2024 5-Year Estimates
How O Fallon, MO has changed in 5 years
Rent in O Fallon, MO has climbed 31.2% since 2021, going from about $1,375 per month to roughly $1,804 today. Headcount in the area went from 90,802 to 93,801 between 2021 and 2024, a 3.3% change. Reading these numbers side by side helps frame whether current listings in O Fallon, MO look reasonable against where the market sat half a decade ago.
Discussions about O Fallon
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Can you afford rent in O Fallon on your salary?
At $1,804/mo, how O Fallon rent compares to typical pay (30% rule).
O Fallon rent by bedroom count
Median rent for each apartment size in O Fallon. Click any size for full breakdown.
Tips for renters in O Fallon
Last updated: August 17, 2026
The median rent in O Fallon is $1,804/mo as of August 2026. A studio apartment averages $1,135/mo while a 2-bedroom runs $1,455/mo. One-bedroom apartments average $1,180/mo and 3-bedroom units go for $1,880/mo.
At 30% of estimated US median household income ($72,000/yr), O Fallon ranks as moderate compared to the national benchmark of 30%. Rents have decreased 1.2% over the past year.
Frequently asked questions
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What percentage of O Fallon residents rent vs. own?
How does O Fallon rent compare to the national average?
At $1,804/mo, rent takes ~30% of US median household income ($72,000/yr). The standard benchmark is 30%.
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Estimated from ZIP-level data
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