Illinois Gas Tax

Illinois gasoline currently averages $4.11 a gallon. Against that, the 90.1¢ of combined state and federal tax is about 21.9% of what a driver pays — with local taxes, where they apply, on top.

Tax rate from EIA as of July 2026; pump price is the current EIA weekly average. The two are published on different schedules, so the share moves as prices move even when the tax does not.

Illinois’s state gas tax of 71.7¢ is 37.9¢ above the 33.8¢ average across 50 states and D.C. — the 2nd-highest, or equivalently the 50th-lowest.

What is the gas tax in Illinois?

Illinois charges 71.7¢ per gallon in state gasoline taxes — 49.6¢ of state excise tax plus 22.1¢ in other state taxes and fees. Adding the 18.4¢ federal tax brings the total to 90.1¢ per gallon, according to U.S. Energy Information Administration data as of July 2026. These are state and federal taxes only and exclude county and local taxes.

How does Illinois's gas tax compare to other states?

Illinois's state gasoline tax of 71.7¢ per gallon ranks 2nd-highest of the 50 states and D.C. that EIA lists, against an average of 33.8¢. The highest is California at 73.6¢ and the lowest is Alaska at 8.9¢.

What is the federal gas tax in Illinois?

The federal gasoline tax is 18.4¢ per gallon in Illinois, the same as in every other state — 18.3¢ of excise tax plus a 0.1¢ Leaking Underground Storage Tank fee. It has been unchanged since 1993.

How much of the price of gas in Illinois is tax?

With Illinois gasoline averaging $4.11 per gallon, the 90.1¢ of combined state and federal tax is about 21.9% of the pump price. Local taxes, where they apply, are on top of that.

Does Illinois charge local gas taxes too?

Yes — EIA flags Illinois as a state where local option taxes are allowed, so some counties and cities add their own tax on top of the 71.7¢ state rate. EIA's table covers state taxes of general application and excludes county and local taxes, so a driver in some Illinois cities pays more than the figure shown here.