Here's what it costs to live in O'Fallon, Illinois, based on the latest US government data. Renters pay a median of $1,312 per month, while the typical home is valued around $274,100. Households earn a median of $102,793 per year, leaving rent at a manageable share of income for many residents. The figures below cover housing, local wages by occupation, demographics, and air quality, all drawn from the US Census Bureau, BEA, HUD, and EPA.
Median Household Income
$102,793
Annual · Census ACS
Median Gross Rent
$1,312
Per month · Census ACS
Median Home Value
$274,100
Census ACS
Cost of Living Index
N/A
BEA RPP · US avg = 100
1BR Fair Market Rent
N/A
HUD FMR
2BR Fair Market Rent
N/A
HUD FMR
3BR Fair Market Rent
N/A
HUD FMR
HUD Fair Market Rent = 40th percentile gross rent · FY2024
State Income Tax
4.95%
Top marginal rate
State Sales Tax
6.25%
Statewide base rate (local add-ons may apply)
Source: Tax Foundation (2024)
| Occupation | Median Annual Wage |
|---|---|
| 💻Software Developer | N/A |
| 🏥Registered Nurse | N/A |
| 📚Elementary Teacher | N/A |
| ⚡Electrician | N/A |
| 📊Accountant | N/A |
Source: BLS OEWS 2023 (metro-level data)
Population
32,139
Latest estimate
Median Age
36.9 yrs
Census ACS
🌬️
AQI data not available
Source: EPA AirNow
What is the cost of living index for O'Fallon?
The cost of living index for O'Fallon is not yet available in our database.
What is the median rent in O'Fallon?
The median gross rent in O'Fallon is $1,312 per month according to US Census ACS data.
What is the median household income in O'Fallon?
The median household income in O'Fallon is $102,793 per year.
What is the median home value in O'Fallon?
The median home value in O'Fallon is $274,100 based on the latest Census ACS survey.
How is the air quality in O'Fallon?
Air quality data for O'Fallon is not yet available.
What are the taxes like in O'Fallon?
Illinois has a top state income tax rate of 4.95% and a statewide sales tax of 6.25% (local rates may add to this). Source: Tax Foundation, 2024.
Data last updated: December 1, 2024 · Sources: US Census ACS, BEA RPP, BLS OEWS, HUD FMR, EPA AirNow, Tax Foundation · Methodology