Lake Forest, CA vs Ontario, CA

The cost of living difference between Lake Forest, CA and Ontario, CA is dramatic. Ontario is 34.5% cheaper than Lake Forest, a gap that translates to thousands of dollars per year in household expenses. Lake Forest has a cost index of 191 while Ontario sits at 142, 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 $2,616/month compared to $1,916/month in Ontario — a 37% difference. Home values follow the same pattern: Ontario is more affordable at $568,000 median vs $876,300.

Median household income in Lake Forest is $131,378 compared to $82,806 in Ontario (+58.7%). 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 23.9% of their income on rent, less than the 27.8% in Ontario.

Climate-wise, both cities share similar average temperatures (64.9°F vs 66.8°F). Ontario receives more rainfall at 11.6" per year compared to 11.2" in Lake Forest.