O'Fallon, MO vs Springfield, MO

The cost of living difference between O'Fallon, MO and Springfield, MO is dramatic. Springfield is 38.7% cheaper than O'Fallon, a gap that translates to thousands of dollars per year in household expenses. O'Fallon has a cost index of 101 while Springfield sits at 73, making this one of the more striking comparisons on our site. Relocating between these cities would require a serious reassessment of budget and lifestyle expectations.

On the housing front, median rent in O'Fallon is $1,400/month compared to $920/month in Springfield — a 52% difference. Home values follow the same pattern: Springfield is more affordable at $165,200 median vs $305,100.

Median household income in O'Fallon is $107,203 compared to $45,984 in Springfield (+133.1%). While O'Fallon is more expensive, its higher salaries more than compensate — residents there may actually end up with more disposable income. Looking at affordability, residents of O'Fallon spend roughly 15.7% of their income on rent, less than the 24% in Springfield.