May 2026 average monthly gas cost

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The cost of driving by state varies depending on local gas prices and whether you drive a traditional gas-powered vehicle or an electric vehicle (EV). Gas prices and electricity rates vary by location and fluctuate often, so it’s important to check for the most recent data.
Choose Energy monitors monthly driving costs to show the average cost of gas by state and the cost to operate an EV. This May 2026 report incorporates data from AAA, the Department of Energy (DOE), and other government sources to measure average monthly gas costs by state.
Let’s start with gasoline. As of May 4, drivers in the U.S. paid an average of $4.46 per gallon for regular gasoline, according to AAA. That’s 40 cents higher than the price drivers paid on April 1, and $1.26 higher than on March 4, the last two times we updated this analysis.
Which states had the most and least expensive gasoline?
Drivers in California paid the highest gasoline prices on May 4 at $6.11 per gallon. That’s 21 cents more than what Californians paid on April 1, and 37.2% higher than the national average. Drivers in Georgia paid the least per gallon on May 4 with an average price of $3.86, which is 13.4% lower than the national average.