Barrington, IL vs O'Fallon, IL

The cost of living difference between Barrington, IL and O'Fallon, IL is dramatic. O'Fallon is 47.3% cheaper than Barrington, a gap that translates to thousands of dollars per year in household expenses. Barrington has a cost index of 141 while O'Fallon sits at 96, 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 Barrington is $1,886/month compared to $1,312/month in O'Fallon — a 44% difference. Home values follow the same pattern: O'Fallon is more affordable at $274,100 median vs $580,900.

Median household income in Barrington is $150,714 compared to $102,793 in O'Fallon (+46.6%). The higher salaries in Barrington partially offset the cost difference, but don't fully close the gap. Looking at affordability, residents of Barrington spend roughly 15% of their income on rent, less than the 15.3% in O'Fallon.