Idaho gas prices this week
Idaho is in EIA's Rocky Mountain (PADD 4) region. EIA does not publish a separate weekly price for Idaho, so the prices below are the regional average for Rocky Mountain (PADD 4).
Weekly prices as of November 9, 2026 (Monday 8:00 a.m. survey), released by EIA Nov 10, 2026. Next EIA release: Nov 17, 2026.
+$1.037 vs a year ago
+$2.403 vs a year ago
Regular gasoline in the Rocky Mountain (PADD 4) region averaged $3.946 in the week of November 9, 2026, $0.049 below the U.S. average of $3.995.
This week in numbers
- Over the past two years, Rocky Mountain (PADD 4) regular gasoline ranged from $2.403 (week of Jan 5, 2026) to $4.587 (week of May 18, 2026).
- Four-week change: −$0.493 (from $4.439 on Oct 12).
- A year earlier (week of Nov 10, 2025) the average was $2.909, so prices are $1.037 higher than a year ago.
- Premium costs $0.692 more per gallon than regular here this week; on a 15-gallon fill-up that is $10.38.
- Of the 8 EIA areas that together cover the whole country (the three East Coast subregions, the Midwest, Gulf Coast, Rocky Mountain, the West Coast excluding California, and California), Rocky Mountain (PADD 4) is the fourth least expensive this week.
Calculated by oyll.com from EIA weekly series EMM_EPMR_PTE_R40_DPG. View the EIA series.
EIA city prices elsewhere in Rocky Mountain (PADD 4)
EIA does not survey a city in Idaho. These are the metro areas in the same region that EIA does publish, for comparison:
| Area | Regular | Midgrade | Premium | Weekly change (regular) |
|---|---|---|---|---|
| Denver (CO) | $3.642 | $4.110 | $4.409 | −$0.374 |
Calculate a trip's fuel cost at these prices →
Two-year trend
Source: U.S. EIA, series EMM_EPMR_PTE_R40_DPG and EMM_EPMR_PTE_NUS_DPG.
Regional context
| Area | Regular | Midgrade | Premium | Diesel | Weekly change (regular) |
|---|---|---|---|---|---|
| Rocky Mountain (PADD 4) | $3.946 | $4.321 | $4.638 | $6.206 | −$0.267 |
| United States | $3.995 | $4.608 | $5.013 | $6.127 | −$0.158 |
About Idaho in EIA's data
- Idaho is in the Rocky Mountain (PADD 4) region.
- EIA does not publish a weekly gasoline price for Idaho alone; the regional series is the closest official figure.
- Diesel: shown as the Rocky Mountain (PADD 4) regional average.
- Prices are volume-weighted averages of a sample of stations, include all taxes, and are cash self-serve prices as of 8:00 a.m. Monday (EIA methodology).
Other states in Rocky Mountain (PADD 4)
Frequently asked questions
Does EIA publish a weekly gas price for Idaho?
No. EIA publishes weekly retail prices for the U.S., its PADD regions and subregions, nine states and ten cities. Idaho is not one of the states, so this page shows the Rocky Mountain (PADD 4) average, a regional figure covering Idaho together with the other states in that area. That regional regular-grade average is $3.946 per gallon for the week of November 9, 2026.
Which EIA region is Idaho in?
Idaho is in the Rocky Mountain (PADD 4) region. PADDs (Petroleum Administration for Defense Districts) are the regions EIA uses to report petroleum statistics.
How often are these prices updated?
EIA collects retail prices every Monday as of 8:00 a.m. and normally publishes them around 5:00 p.m. Eastern time the same day (on Tuesday after a federal holiday, still reflecting Monday prices). This site checks EIA for new figures several times a day.
Do these prices include taxes?
Yes. EIA retail prices include all federal, state and local taxes. EIA reports that the federal tax on gasoline is 18.4 cents per gallon (an 18.3-cent excise tax plus a 0.1-cent Leaking Underground Storage Tank fee).