Ohio Gas Prices have jumped back up after a week or so of flirting with the $3.00 a gallon level. The state average was $3.18 for a gallon of regular gas in Monday’s survey from Auto Club AAA. That’s up from this time last week. the Ohio price was a few cents less than the national average of $3.21, which was up 2 cents from a week ago. According to gasbuddy.com gas is selling for around $3.09 a gallon in Zanesville.