Ontario, CA vs South San Francisco, CA

The cost of living difference between Ontario, CA and South San Francisco, CA is dramatic. Ontario is 36% cheaper than South San Francisco, a gap that translates to thousands of dollars per year in household expenses. Ontario has a cost index of 142 while South San Francisco sits at 222, 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 Ontario is $1,916/month compared to $2,833/month in South San Francisco — a 32% difference. Home values follow the same pattern: Ontario is more affordable at $568,000 median vs $1,160,100.

Median household income in Ontario is $82,806 compared to $135,909 in South San Francisco (-39.1%). While South San Francisco is more expensive, its higher salaries more than compensate — residents there may actually end up with more disposable income. Looking at affordability, residents of Ontario spend roughly 27.8% of their income on rent, more than the 25% in South San Francisco.

Climate-wise, Ontario is notably warmer with an average of 66.8°F compared to 58.7°F in South San Francisco. South San Francisco receives more rainfall at 19.6" per year compared to 11.6" in Ontario.