EIA week of 2026-07-06

Gas prices in Idaho

Regular gasoline
$3.66/gal
Rocky Mountain regional average (EIA region for Idaho)
Diesel
$4.48/gal (regional)
US average
$3.78/gal Idaho is 3% below
Typical 15-gal fill-up
$54.91
Find stations near you What will your tank cost?

Paying less than the Idaho average

  • Treat $3.66 as your benchmark. Stations well above it are charging a convenience premium; at or below it is a fair local deal.
  • Warehouse clubs and discounters beat it daily. Costco, Sam’s Club, Murphy USA, ARCO and similar brands consistently price below the average — our map finder highlights them near you.
  • Avoid interstate plazas. A mile off the highway is routinely cheaper.
  • Cut how much you burn. The fastest saving isn’t the station, it’s the right-hand pedal — see how to save money on fuel.

The EIA publishes exact weekly averages for 9 states; for Idaho it reports the Rocky Mountain region, which Idaho belongs to. It’s the best official benchmark available — local prices can sit somewhat above or below it.

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Frequently asked questions

How much is gas in Idaho right now?
The current benchmark is $3.66 per gallon of regular (Rocky Mountain regional average (EIA region for Idaho), EIA data for the week of 2026-07-06). Individual stations range around this — warehouse clubs and discounters typically sit below it, highway plazas above it.
Why do gas prices in Idaho differ from the national average?
Idaho is currently 3% below the national average of $3.78. State-to-state differences come mostly from state fuel taxes, distance from refineries, fuel-blend requirements and local competition.
Where is the cheapest gas in Idaho?
High-volume discounters (Costco, Sam’s Club, Murphy USA, ARCO and similar) are consistently below the average shown here. Use our station finder map to see stations near you with the cheaper brands highlighted.
How fresh is this figure?
It’s the official U.S. Energy Information Administration weekly retail average, week of 2026-07-06. The EIA publishes every Monday; this page refreshes with each site update.
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