O'Fallon, MO

Average · 101

Missouri · Population 92,697 · Updated March 2026

$1,400
Median Rent / Month
$107,203
Median Income
$305,100
Median Home Value
$1,557
Owner Costs / Month

Affordability

How far your income goes in O'Fallon

15.7%
Rent-to-Income Ratio
Affordable
Rent takes less than 25% of median income — considered affordable by HUD standards.

Tax Burden in Missouri

State-level tax rates that affect your costs

4.95%
Income Tax (Top Rate)
4.225%
Sales Tax
0.93%
Property Tax Rate

Estimated Annual Costs

$16,800
Annual Rent
$5,307
State Income Tax
$2,837
Property Tax (est.)

Cost of Living Overview

O'Fallon has a cost of living close to the national average, offering a balanced mix of expenses and amenities. With a cost index of 101 (where 100 equals the national median), O'Fallon residents can expect to pay median rent of $1,400/month while earning a median household income of $107,203/year.

The median home value in O'Fallon, MO is $305,100, with typical monthly owner costs around $1,557 including mortgage, insurance, and taxes. The median rent-to-income ratio of 15.7% means housing is relatively affordable here — well below the 30% threshold that HUD considers cost-burdened.

Missouri has a moderate income tax rate of 4.95%. Combined with a 4.225% sales tax rate and 0.93% effective property tax rate, the overall tax environment is a factor in the total cost of living in O'Fallon.

Frequently Asked Questions

Common questions about living costs in O'Fallon

What is the cost of living in O'Fallon, MO?
The cost of living index in O'Fallon, MO is 101 (US average = 100). Median monthly rent is $1,400, median household income is $107,203/year, and the median home value is $305,100.
Is O'Fallon, MO affordable?
No, O'Fallon is more expensive than the national average with a cost index of 101. The rent-to-income ratio is 15.7%—below the 30%% threshold considered affordable by HUD.
What is the average rent in O'Fallon, MO?
The median gross rent in O'Fallon, MO is $1,400 per month according to the US Census Bureau ACS 2023 data. Annual rent costs approximately $16,800.
What is the median household income in O'Fallon?
The median household income in O'Fallon, MO is $107,203 per year. This compares to the national median of approximately $80,000.
What are the taxes like in Missouri?
Missouri has a top income tax rate of 4.95%, a sales tax of 4.225%, and an effective property tax rate of 0.93%.