Columbus is 22% cheaper than St. Petersburg.
When comparing Columbus, OH and St. Petersburg, FL, the overall cost of living indices are 83 and 106 respectively (national median = 100). Rent is $318/month cheaper in Columbus, saving renters about $3,816/year.
Median household income is $7,791/year higher in St. Petersburg. Home values also differ significantly — the median in Columbus is $234,500 compared to $331,500 in St. Petersburg.
Florida has no state income tax, giving St. Petersburg residents a significant tax advantage over Ohio's 3.5% rate.
Columbus vs St. Petersburg — common questions
Other cost of living comparisons for Columbus and St. Petersburg