EIA Weekly On-Highway Diesel Survey - week of August 31, 2026
Diesel cost per gallon in Illinois
Read this as a district figure, not a state figure. The EIA weekly on-highway diesel survey prices the United States, its districts and California, and nothing else. It does not price Illinois. The number above is Midwest (PADD 2), series EMD_EPD2D_PTE_R20_DPG, and it is the closest published federal figure for Illinois. We do not estimate a price for Illinois from it. 5 of Illinois's neighbouring states sit in the same district and therefore show the same price below.
EIA does not publish a weekly on-highway diesel price for Illinois. The federal survey prices the district Illinois sits in, Midwest (PADD 2), at $5.571 per gallon in the week of August 31, 2026 (series EMD_EPD2D_PTE_R20_DPG), $0.03 below the US average of $5.599. Pump prices inside the district vary around that figure.
Diesel tax breakdown
Tax rates: Federation of Tax Administrators state motor fuel table and state revenue departments. Not EIA data. The percentage is against the EIA figure shown above, which is a district figure unless Illinois is surveyed directly.
Neighbouring states
Neighbours in the same EIA district carry the same published figure. A matching price here means the federal survey shows no measured gap across that border, not that pumps are identical.
What shapes the diesel price in Illinois
Illinois carries one of the highest effective diesel tax burdens in the Midwest once the state excise and underground storage tank fee are combined, which is why Chicago-area pump prices typically run above neighbouring Iowa despite both sitting in the same EIA district. Chicago is a major freight hub for both east-west and north-south corridors, and the Chicago terminal complex is one of the largest fuel distribution hubs in the country.
The trip calculator starts at $5.57/gal, the EIA figure above. Change it to the price you actually see at the pump for a real answer.