What is the current diesel price in Delaware?

The current diesel price in Delaware is $5.36 per gallon as of July 28, 2026, according to AAA Gas Prices daily state diesel averages. This is $0.23 above the US national average of $5.13/gal. Delaware ranks #33 of 50 states by diesel price.

What is the diesel tax in Delaware?

Delaware's state diesel tax is 22 cents per gallon. Combined with the federal diesel tax of 24.4 cents per gallon, the total tax burden on a gallon of diesel in Delaware is 46.4 cents (9% of the retail price).

Updated July 28, 2026 - AAA daily average

Diesel Cost per Gallon in Delaware (2026)

$5.36/GAL

+0.23 vs US average ($5.13)Rank #33 of 50 statesPADD 1

Diesel Tax Breakdown

Federal diesel excise tax24.4c/gal

Delaware state diesel tax22.0c/gal

Total tax46.4c/gal

Tax as % of price9%

Sources: Federation of Tax Administrators, EIA. Rates as of April 2026.

Nearby States Comparison

Maryland

$5.43+0.07

Pennsylvania

$5.58+0.22

New Jersey

$5.45+0.09

CALCULATE YOUR FUEL COST IN DELAWARE

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Sources: State diesel average from AAA Gas Prices (gasprices.aaa.com), July 28, 2026; US average and PADD context from the EIA Weekly On-Highway Diesel Fuel Survey (July 20, 2026); state tax from the Federation of Tax Administrators diesel tax table. State prices are representative averages; actual pump prices vary by retailer and location.

- US Average - All States - Trip Calculator - Diesel vs Gas - Fleet Cards