2024 Gas Prices By State Chart. (gas tanks typically hold between 12 and 15 gallons. The average cost of gas has decreased 15% in the last two years, from when it was $4.27 per gallon.
The current national gas price average is $3.62 per gallon. California pumps up its gas tax the most at 68.1 cents per gallon (cpg), followed by illinois (66.5 cpg) and.