Cost of Living
per year
per month
How O'Fallon's prices compare to the US city average across major spending categories.
Index: 100 = US city average. Values >100 mean more expensive, <100 means cheaper.
How far does your salary go in O'Fallon?
Your $100,000 in O'Fallon has the same purchasing power as $96,721 in the average US city. You'd need $3,279 more here to maintain that standard of living.
Demographics and workforce data from the US Census ACS 5-Year.
bachelor's or higher
Climate, safety, and walkability indicators.
See a side-by-side breakdown of cost of living, housing, and salaries.
Popular comparisons
Sorted by affordability — most affordable first.
O'Fallon, Missouri has a cost-of-living index of 103, which is 3% above the national average. The typical renter pays $1,311 per month. The median household earns $104,863 per year.
To match the lifestyle of a $70,000 earner in the average US city, you'd need about $72,373 per year in O'Fallon. Single renters typically want at least three times the $15,732 threshold to cover housing comfortably.
O'Fallon is near the US city average. Overall prices are 3% above the national average.