ID · fuel prices · week of Nov 9, 2026
Idaho diesel and gas prices
The average pump price of diesel and gasoline in Idaho, against the country and the Rocky Mountain region, and what it costs a truck per mile.
$6.185/gal diesel
−3.7% from last week
- Regular
- $4.090
- Premium
- $4.759
- Diesel vs US
- +0.9%
- Diesel, 1 year
- +63.5%
Idaho prices by fuel
| Fuel | Per gallon | 1 wk | 1 yr | Basis |
|---|---|---|---|---|
| Diesel | $6.185 | −23.9¢ | +63.5% | Estimate |
| Regular gasoline | $4.090 | −22.1¢ | +31.4% | Estimate |
| Midgrade gasoline | $4.447 | −18.6¢ | +32.2% | Estimate |
| Premium gasoline | $4.759 | −16.4¢ | +29.2% | Estimate |
EIA does not survey Idaho on its own. These are estimates: the Rocky Mountain regional survey with Idaho's fuel taxes in place of the region's average tax.
Idaho · monthly · dollars per gallon
Idaho fuel price history
DieselRegular gasoline
Diesel in Idaho averaged $6.185 a gallon in the week of Nov 9, 2026, +0.9% against the US average of $6.127 and against $6.206 across the Rocky Mountain region. That ranks Idaho 22 of 49 for diesel, most expensive first.
Estimated history applies today's tax rates to past regional prices.
Fuel taxes in Idaho
| Per gallon | State | Federal | Total |
|---|---|---|---|
| Diesel | $0.330 | $0.244 | $0.574 |
| Gasoline | $0.330 | $0.184 | $0.514 |
State excise tax plus other state taxes and fees. EIA, July 2026.
Diesel cost per mile in Idaho
At $6.185 a gallon, with fuel's share of the all-in rate for loads leaving Idaho. Idaho freight rates →
| Truck type | Fuel per mile | Per 1,000 miles |
|---|---|---|
| VAN53' dry van | $0.91 | $910 |
| REEF53' refrigerated | $1.01 | $1,014 |
| FLAT48' flatbed | $0.97 | $966 |
| STEPStep deck | $1.00 | $998 |
| PWRPower only | $0.91 | $910 |
| HOTHotshot | $0.62 | $618 |
| BOX26' box truck | $0.69 | $687 |
| SPRTSprinter van | $0.39 | $387 |
Fuel prices by city in Idaho
- Boise City237,963
- Meridian139,740
- Nampa117,350
- Caldwell73,088
- Idaho Falls69,523
- Pocatello58,231
- Coeur d'Alene57,355
- Twin Falls55,589
- Post Falls45,800
- Rexburg40,695
- Lewiston34,693
- Eagle33,451
- Kuna29,127
- Moscow26,894
- Ammon20,095
- Star18,208
- Hayden16,924
- Mountain Home16,912
- Chubbuck16,577
- Jerome13,481
- Blackfoot13,224
- Garden City12,936
- Rathdrum12,626
- Burley12,211
- Middleton11,730
- Sandpoint10,444
- Hailey9,976
- Emmett8,803
- Payette8,754
- Fruitland7,078
- Rupert6,343
- Preston6,160
- Weiser6,112
- Rigby5,683
- Kimberly5,592
- Shelley5,262