Rhode Island diesel prices today
Rhode Island diesel prices todayDiesel averages $6.31 a gallon in Rhode Island on 2 October 2026 — the 26th most expensive of 51 states, and down $0.03 on the week.
Rhode Island against the other states
$0.05 a gallon below 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 Rhode Island is $4.35, so diesel costs $1.97 more per gallon — and more than premium at $5.46.
Tax on a gallon of diesel
$0.24 federal + $0.38 Rhode Island · 17th highest of 51. The rest — about $5.69 — 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 Rhode Island
AAA reports a separate diesel average for Providence.
| Metro area | Diesel | vs state |
|---|---|---|
| Providence | $6.31 | level |
Show the data as a table
What a diesel fill-up costs in Rhode Island
- Diesel car or SUV — 18 gal$113.65
- Heavy-duty pickup — 34 gal$214.68
- Box truck — 60 gal$378.84
- Semi truck, two tanks — 250 gal$1,578.50
Diesel in neighbouring states
More for Rhode Island
Frequently asked questions
How much is diesel in Rhode Island today?
$6.31 a gallon, AAA's Rhode Island average for 2 October 2026 — the 26th most expensive of 51 states. Regular gasoline is $4.35, so diesel costs $1.97 more per gallon.
Are diesel prices going up in Rhode Island?
Diesel is down $0.03 (0.5%) on a week ago, and up $2.51 on a year ago, when it was $3.81, on AAA's own earlier averages.
How much is the diesel tax in Rhode Island?
$0.62 a gallon: $0.24 federal plus $0.38 in Rhode Island state taxes and fees, the 17th highest of 51. The state average is $0.36. Rates as of 1 January 2026.