May 2025 average monthly gas cost
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Last updated: May 2025
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 2025 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 2, drivers in the U.S. paid an average of $3.18 per gallon for regular gasoline, according to AAA. That price is 4 cents lower than on April 10, when we last updated this analysis.
Which states had the most and least expensive gasoline?
Drivers in California paid the most for their gasoline on May 2— $4.77 per gallon. That is 16 cents less than Californians paid on April 10 and 50.1% higher than the national average. Drivers in Mississippi paid the least per gallon on May 2 with an average price of $2.66, which is 16.3% lower than the national average.