District of Columbia diesel prices today
District of Columbia diesel prices todayDiesel averages $6.51 a gallon in District of Columbia on 2 October 2026 — the 14th most expensive of 51 states, and down $0.01 on the week.
District of Columbia against the other states
$0.14 a gallon above the unweighted mean of AAA's 51 state averages ($6.36). The cheapest diesel is in Texas at $5.79, the dearest in California at $8.38.
Regular gas in District of Columbia is $4.44, so diesel costs $2.07 more per gallon — and more than premium at $5.47.
Tax on a gallon of diesel
$0.24 federal + $0.34 District of Columbia · 20th highest of 51. The rest — about $5.92 — is the fuel itself, refining, distribution and the retailer’s margin.
Rates as of 1 January 2026. Local taxes, where they apply, are not included.
Diesel prices by city in District of Columbia
AAA's diesel averages for 2 District of Columbia metro areas, cheapest first — $0.11 a gallon between the two ends.
| Metro area | Diesel | vs state |
|---|---|---|
| Washington DC Metro | $6.40 | −$0.11 |
| Washington | $6.51 | level |
Show the data as a table
What a diesel fill-up costs in District of Columbia
- Diesel car or SUV — 18 gal$117.11
- Heavy-duty pickup — 34 gal$221.20
- Box truck — 60 gal$390.36
- Semi truck, two tanks — 250 gal$1,626.50
Diesel in neighbouring states
More for District of Columbia
Frequently asked questions
How much is diesel in District of Columbia today?
$6.51 a gallon, AAA's District of Columbia average for 2 October 2026 — the 14th most expensive of 51 states. Regular gasoline is $4.44, so diesel costs $2.07 more per gallon.
Are diesel prices going up in District of Columbia?
Diesel is down $0.01 (0.2%) on a week ago, and up $2.65 on a year ago, when it was $3.85, on AAA's own earlier averages.
Where is diesel cheapest in District of Columbia?
Of the 2 metro areas AAA reports in District of Columbia, Washington DC Metro has the cheapest diesel at $6.40 a gallon and Washington the dearest at $6.51. Individual stations vary around these averages.
How much is the diesel tax in District of Columbia?
$0.58 a gallon: $0.24 federal plus $0.34 in District of Columbia state taxes and fees, the 20th highest of 51. The state average is $0.36. Rates as of 1 January 2026.
Is diesel cheaper in a neighbouring state?
Yes — Virginia ($6.29, $0.22 less), Maryland ($6.43, $0.08 less). On a 100-gallon fill that is up to $21.90; whether it is worth the drive depends on how far the border is.