Ontario is 6% cheaper than Richmond.
When comparing Ontario, CA and Richmond, CA, the overall cost of living indices are 152 and 161 respectively (national median = 100). Rent is comparable in both cities, with less than $50/month separating them.
Median household income is $7,232/year higher in Richmond. Home values also differ significantly — the median in Ontario is $568,000 compared to $650,100 in Richmond.
Both cities share the same state tax structure since they are in California.
Ontario vs Richmond — common questions
Other cost of living comparisons for Ontario and Richmond