Updated April 29, 2026 - EIA Weekly Survey
Diesel Cost per Gallon in Illinois (2026)
$5.61/GAL
+0.02 vs US average ($5.59)Rank #38 of 50 statesPADD 2
Diesel Tax Breakdown
Federal diesel excise tax24.4c/gal
Illinois state diesel tax67.8c/gal
Total tax92.2c/gal
Tax as % of price1643%
Sources: Federation of Tax Administrators, EIA. Rates as of April 2026.
Why Diesel Costs $5.61/Gal in Illinois
Illinois has one of the highest effective diesel tax burdens in the Midwest due to a combined state tax (state excise + underground storage tank fee) of approximately 67.8 cents/gal. This is why Chicago-area diesel runs $5.61/gal vs $5.07 in neighboring Iowa. Chicago is a major freight hub for east-west and north-south corridors (I-80, I-55, I-57, I-90, I-94). The Chicago terminal complex is one of the largest fuel distribution hubs in the US, with Buckeye Partners, Kinder Morgan, and LOOP operating major pipeline terminals.
CALCULATE YOUR FUEL COST IN ILLINOIS
Use our trip calculator prefilled at $5.61/gal for Illinois.
Sources: EIA Weekly On-Highway Diesel Fuel Survey, AAA Gas Prices (gasprices.aaa.com), Federation of Tax Administrators diesel tax table. Updated April 29, 2026. State prices are representative averages; actual pump prices vary by retailer and location.