Massachusetts diesel prices today
Massachusetts diesel prices todayDiesel averages $6.36 a gallon in Massachusetts on 2 October 2026 — the 25th most expensive of 51 states, and down $0.03 on the week.
Massachusetts against the other states
$0.00 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 Massachusetts is $4.36, so diesel costs $2.00 more per gallon — and more than premium at $5.39.
Tax on a gallon of diesel
$0.24 federal + $0.27 Massachusetts · 40th highest of 51. The rest — about $5.85 — 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 Massachusetts
AAA's diesel averages for 7 Massachusetts metro areas, cheapest first — $0.14 a gallon between the two ends.
| Metro area | Diesel | vs state |
|---|---|---|
| Seekonk | $6.26 | −$0.10 |
| Springfield | $6.28 | −$0.08 |
| Boston | $6.35 | −$0.01 |
| Barnstable & Yarmouth | $6.35 | −$0.01 |
| Pittsfield | $6.37 | +$0.01 |
| Worcester | $6.39 | +$0.03 |
| Cambridge, Newton & Framingham | $6.40 | +$0.04 |
Show the data as a table
What a diesel fill-up costs in Massachusetts
- Diesel car or SUV — 18 gal$114.50
- Heavy-duty pickup — 34 gal$216.27
- Box truck — 60 gal$381.66
- Semi truck, two tanks — 250 gal$1,590.25
Diesel in neighbouring states
More for Massachusetts
Frequently asked questions
How much is diesel in Massachusetts today?
$6.36 a gallon, AAA's Massachusetts average for 2 October 2026 — the 25th most expensive of 51 states. Regular gasoline is $4.36, so diesel costs $2.00 more per gallon.
Are diesel prices going up in Massachusetts?
Diesel is down $0.03 (0.4%) on a week ago, and up $2.52 on a year ago, when it was $3.84, on AAA's own earlier averages.
Where is diesel cheapest in Massachusetts?
Of the 7 metro areas AAA reports in Massachusetts, Seekonk has the cheapest diesel at $6.26 a gallon and Cambridge, Newton & Framingham the dearest at $6.40. Individual stations vary around these averages.
How much is the diesel tax in Massachusetts?
$0.51 a gallon: $0.24 federal plus $0.27 in Massachusetts state taxes and fees, the 40th highest of 51. The state average is $0.36. Rates as of 1 January 2026.
Is diesel cheaper in a neighbouring state?
Yes — Rhode Island ($6.31, $0.05 less). On a 100-gallon fill that is up to $4.70; whether it is worth the drive depends on how far the border is.