Gasoline Tax is collected from every State in the United States. The US Federal government collects 18.4 cents on every gallon of gasoline. State and Local government also collect their own gas tax. The average gas tax in the United States is 49.9 cents per gallon (April 2014)
In Washington, gas tax is 55.9 cents per gallon of unleaded gasoline. Washington is ranked 10th in terms of gasoline tax in the United States.