Lake Forest, IL vs Mount Prospect, IL

The cost of living difference between Lake Forest, IL and Mount Prospect, IL is dramatic. Mount Prospect is 57.6% cheaper than Lake Forest, a gap that translates to thousands of dollars per year in household expenses. Lake Forest has a cost index of 175 while Mount Prospect sits at 111, 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 Lake Forest is $2,120/month compared to $1,454/month in Mount Prospect — a 46% difference. Home values follow the same pattern: Mount Prospect is more affordable at $377,000 median vs $909,800.

Median household income in Lake Forest is $228,120 compared to $103,911 in Mount Prospect (+119.5%). While Lake Forest is more expensive, its higher salaries more than compensate — residents there may actually end up with more disposable income. Looking at affordability, residents of Lake Forest spend roughly 11.2% of their income on rent, less than the 16.8% in Mount Prospect.

Climate-wise, both cities share similar average temperatures (50.8°F vs 50.8°F). Mount Prospect receives more rainfall at 32.3" per year compared to 32.3" in Lake Forest.