Gas Tax By State 2024. The highest gas tax is found in pennsylvania at $0.61 per gallon, significantly more than the lowest. The average tax per gallon of gas in the u.s.

Published october 14, 2024 6:40 am. Refund claims must be postmarked on or after july 1, but no later than september 30 following the fiscal year ending june 30, 2024.