National Gas Prices Drop As Diesel Costs Increase

The U.S. national average for regular unleaded gas has fallen by seven cents over the past week.

Updated on Oct. 21, 2026 in Oil and Gas

Isometric editorial illustration of two fuel pump nozzles on a block, representing national fuel price trends. — The national average for regular gasoline dropped to $4.26 per gallon, while diesel prices rose to $6.31 per gallon nationwide. AI Illustration. Upload story photo >

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The national average price for a gallon of regular unleaded gasoline currently sits at $4.26. This reflects a seven-cent decrease since October 14, 2026.

Why it matters

While gasoline prices are trending downward across the country, diesel costs have moved in the opposite direction, rising by two cents to reach an average of $6.31 per gallon.

The national average for regular unleaded is $4.26, while the average price for diesel has climbed to $6.31. Regional gas averages are $4.12 in Iowa, $3.95 in Missouri, and $4.64 in Illinois.

The details

Regional data shows gasoline prices vary significantly across the Tri-States, with local rates recorded at $4.04 in Adair County, Missouri, $4.48 in Adams County, Illinois, and $3.99 in Wapello County, Iowa.

October 14, 2026: The national average gas price baseline.
October 21, 2026: The current reporting date for national fuel prices.

Market Landscape

The current fuel price trends follow the historical divergence between gasoline and diesel refining costs, which often separates consumer fuel prices during market shifts. These shifts highlight the volatility inherent in the U.S. energy market as regional pricing decouples from national averages.

Drivers in Iowa, Illinois, and Missouri will see different costs at the pump depending on their specific county, with gas prices currently ranging from $3.99 to $4.64 per gallon. Consumers should budget for higher diesel costs this week, as the price for that fuel has increased by two cents.

The takeaway

While gasoline prices are showing a slight decline across the country, diesel users are facing rising costs at the pump. It is wise for motorists to monitor local station pricing as regional averages differ from national figures.