Public Affairs Ohio 10.5-cent gas tax by April 25, 2019 April 25, 2019 On July 1, our gas tax will increase by 10.5 cents per gallon. That means each of us will pay a total of 38.5 cents more per gallon. Diesel fuel will go up to 47 cents per gallon. That’s the bad news. Read more 0 FacebookTwitterPinterestLinkedinWhatsappEmail