Castro Valley, CA vs Ontario, CA

The cost of living difference between Castro Valley, CA and Ontario, CA is dramatic. Ontario is 43.2% cheaper than Castro Valley, a gap that translates to thousands of dollars per year in household expenses. Castro Valley has a cost index of 204 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 Castro Valley is $2,499/month compared to $1,916/month in Ontario — a 30% difference. Home values follow the same pattern: Ontario is more affordable at $568,000 median vs $1,058,200.

Median household income in Castro Valley is $138,069 compared to $82,806 in Ontario (+66.7%). While Castro Valley is more expensive, its higher salaries more than compensate — residents there may actually end up with more disposable income. Looking at affordability, residents of Castro Valley spend roughly 21.7% of their income on rent, less than the 27.8% in Ontario.