Cost of Living in O'Fallon, MO
Cost indexes, living wages, and fair market rents — 2024 Data
Cost of Living Overview
Overall Index
149.6
100 = national avg
+49.6 vs national average
Living Wage (1 Adult)
$65,818
per year
Living Wage (Family of 4)
$155,569
per year
Cost Index by Category
Housing157.2
Food131.9
Transportation163.9
Healthcare125.6
Utilities130.6
100 = national average. Higher = more expensive.
Fair Market Rent
Source: HUD1 Bedroom
$995
per month
2 Bedroom
$1,218
per month
The overall cost of living index in O'Fallon is 149.6, which is 49.6% above the national average. Housing costs are above the national average at an index of 157.2. A single adult needs to earn approximately $65,818 per year to cover basic expenses.