Darien, IL vs Mount Prospect, IL

Mount Prospect is moderately more affordable than Darien, with a 6.6% lower cost of living index. Darien scores 118 compared to 111 for Mount Prospect, where the US average is 100. This difference means residents of Darien can expect to pay noticeably more for everyday expenses, housing, and services.

On the housing front, median rent in Darien is $1,671/month compared to $1,454/month in Mount Prospect — a 15% difference. Home values follow the same pattern: Mount Prospect is more affordable at $377,000 median vs $386,400.

Median household income in Darien is $109,354 compared to $103,911 in Mount Prospect (+5.2%). The higher salaries in Darien partially offset the cost difference, but don't fully close the gap. Looking at affordability, residents of Darien spend roughly 18.3% of their income on rent, more than the 16.8% in Mount Prospect.