Grayslake, IL vs Mount Prospect, IL

Grayslake is moderately more affordable than Mount Prospect, with a 6.7% lower cost of living index. Grayslake scores 103 compared to 111 for Mount Prospect, where the US average is 100. This difference means residents of Mount Prospect can expect to pay noticeably more for everyday expenses, housing, and services.

On the housing front, median rent in Grayslake is $1,434/month compared to $1,454/month in Mount Prospect — a 1% difference. Home values follow the same pattern: Grayslake is more affordable at $293,900 median vs $377,000.

Median household income in Grayslake is $113,697 compared to $103,911 in Mount Prospect (+9.4%). Grayslake offers a double advantage: higher earnings combined with a lower cost of living, giving residents significantly more purchasing power. Looking at affordability, residents of Grayslake spend roughly 15.1% of their income on rent, less than the 16.8% in Mount Prospect.

Climate-wise, both cities share similar average temperatures (48.3°F vs 50.8°F). Grayslake receives more rainfall at 35.3" per year compared to 32.3" in Mount Prospect.