Average U.S. Gas Price Nearly At $5 Per Gallon For the 10th consecutive day, gas prices have reached a new all-time record – nearly topping $5 a gallon in the U.S. According to AAA, the average price for a gallon of gas in the U.S. is $4.97. GasBuddy’s Patrick De Haan expects that average to top the $5 mark by Friday. The most expensive gas is in California, with an average price of $6.40 per gallon. Georgia has the lowest prices, at ‘only’ $4.40 per gallon. How have you had to adjust to account for these gas prices?