O'Fallon, MO vs St. Joseph, MO

The cost of living difference between O'Fallon, MO and St. Joseph, MO is dramatic. St. Joseph is 45.3% 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 St. Joseph sits at 69, 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 $884/month in St. Joseph — a 58% difference. Home values follow the same pattern: St. Joseph is more affordable at $144,200 median vs $305,100.

Median household income in O'Fallon is $107,203 compared to $55,578 in St. Joseph (+92.9%). 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 19.1% in St. Joseph.