Ontario is 43% more expensive than Manchester.
When comparing Ontario, CA and Manchester, NH, the overall cost of living indices are 152 and 106 respectively (national median = 100). Rent is $451/month cheaper in Manchester, saving renters about $5,412/year.
Median household income is $5,391/year higher in Ontario. Home values also differ significantly — the median in Ontario is $568,000 compared to $336,300 in Manchester.
New Hampshire has no state income tax, giving Manchester residents a significant tax advantage over California's 13.3% rate.
Ontario vs Manchester — common questions
Other cost of living comparisons for Ontario and Manchester