State taxes on gasoline and diesel average 27 cents per gallon

State-level taxes and fees on gasoline in the United States averaged 26.5 cents per gallon (¢/gal) as of January 1, 2016. These taxes and feees ranged from a low of 8.95¢/gal in Alaska to a high of 51.4¢/gal in Pennsylvania, and are in addition to the federal tax of 18.4¢/gal. State taxes on diesel are slightly higher—averaging 27.4¢/gal, and ranging from 8.95¢/gal in Alaska to 65.1¢/gal in Pennsylvania—in addition to the 24.4¢/gal federal tax. More »