Delaware gas prices

Gas Prices in Delaware: What Drivers Pay at the Pump

Delaware may be the second-smallest state in the country, but its fuel market punches above its weight thanks to the giant Delaware City refinery on the Delaware River. The current statewide average for regular gas is $3.694 per gallon, which sits comfortably below the US national average of $3.867. If you drive a vehicle that requires higher-octane fuel, expect to pay around $4.313 for mid-grade and $4.611 for premium. Diesel, used heavily by I-95 freight traffic and farm equipment in Sussex County, runs the highest at $4.741 per gallon.

What Drives Delaware's Pump Prices

Three big factors shape what you pay in the First State. The first is the state motor fuel tax. Delaware levies 23 cents per gallon on gasoline and 22 cents on diesel, which is moderate by Northeast standards and notably lower than neighboring Pennsylvania, one of the highest-taxed states in the nation. On top of the state tax sits the federal excise tax of 18.4 cents per gallon on gasoline and 24.4 cents on diesel. Importantly, Delaware has no general sales tax, so unlike many states you are not paying an additional percentage-based levy stacked on top of the fuel itself. That structure helps keep Delaware's retail prices competitive.

The second factor is refining and logistics. The Delaware City refinery, with a capacity of roughly 180,000+ barrels per day, gives the region local supply and reduces reliance on long-haul pipeline shipments. Delaware as a whole is a net fuel importer in the sense that it consumes far more than it produces crude (it has essentially no domestic oil production), but refined-product access through the Colonial Pipeline and waterborne deliveries to the Port of Wilmington keeps the supply chain short and prices steadier than landlocked interior states.

The third factor is seasonal blend rules and demand. Like most of the Mid-Atlantic, Delaware switches to a summer-blend gasoline that costs more to produce, which typically nudges prices up between Memorial Day and Labor Day. Beach traffic heading to Rehoboth and Dewey also tightens summer demand in the southern part of the state.

How Delaware Compares to Other States

Because Delaware lacks a sales tax and keeps its excise tax moderate, drivers here generally pay less than the national figure. Compare that to lower-cost interior states such as North Dakota and South Dakota, where local crude production and short refining distances often produce some of the cheapest fuel in the country. States like Colorado and nearby Virginia offer useful regional benchmarks too, with Virginia in particular sharing the I-95 corridor dynamics that influence Delaware's diesel pricing.

The spread between Delaware's regular and premium grades is about 92 cents, a fairly typical gap. The diesel premium over regular, at roughly $1.05, reflects strong year-round commercial demand and the higher federal tax on diesel. Drivers with flexible vehicles can save meaningfully by sticking to regular grade where their engine permits.

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