Utah diesel prices today
Utah diesel prices todayDiesel averages $6.49 a gallon in Utah on 2 October 2026 — the 15th most expensive of 51 states, and down $0.11 on the week.
Utah against the other states
$0.13 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 Utah is $4.96, so diesel costs $1.53 more per gallon — and more than premium at $5.50.
Tax on a gallon of diesel
$0.24 federal + $0.37 Utah · 18th highest of 51. The rest — about $5.88 — 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 Utah
AAA's diesel averages for 5 Utah metro areas, cheapest first — $0.10 a gallon between the two ends.
| Metro area | Diesel | vs state |
|---|---|---|
| Ogden | $6.44 | −$0.06 |
| Provo & Orem | $6.49 | −$0.00 |
| Logan | $6.49 | −$0.00 |
| Salt Lake City | $6.51 | +$0.01 |
| St. George | $6.53 | +$0.04 |
Show the data as a table
What a diesel fill-up costs in Utah
- Diesel car or SUV — 18 gal$116.86
- Heavy-duty pickup — 34 gal$220.73
- Box truck — 60 gal$389.52
- Semi truck, two tanks — 250 gal$1,623.00
Diesel in neighbouring states
More for Utah
Frequently asked questions
How much is diesel in Utah today?
$6.49 a gallon, AAA's Utah average for 2 October 2026 — the 15th most expensive of 51 states. Regular gasoline is $4.96, so diesel costs $1.53 more per gallon.
Are diesel prices going up in Utah?
Diesel is down $0.11 (1.7%) on a week ago, and up $2.76 on a year ago, when it was $3.73, on AAA's own earlier averages.
Where is diesel cheapest in Utah?
Of the 5 metro areas AAA reports in Utah, Ogden has the cheapest diesel at $6.44 a gallon and St. George the dearest at $6.53. Individual stations vary around these averages.
How much is the diesel tax in Utah?
$0.61 a gallon: $0.24 federal plus $0.37 in Utah state taxes and fees, the 18th highest of 51. The state average is $0.36. Rates as of 1 January 2026.
Is diesel cheaper in a neighbouring state?
Yes — Colorado ($6.06, $0.43 less), Wyoming ($6.21, $0.28 less), Arizona ($6.28, $0.21 less). On a 100-gallon fill that is up to $43.10; whether it is worth the drive depends on how far the border is.