Idaho vs Nevada gas prices
Regular gas is $0.50 a gallon cheaper in Idaho — $7.50 on a 15-gallon fill-up. The two share a border, so that gap is worth knowing before you cross it.
Idaho
Nevada| Grade | ID | NV | Diff. | |
|---|---|---|---|---|
| Regular | $4.31 | $4.81 | $0.50ID | Idaho |
| Midgrade | $4.60 | $5.11 | $0.51ID | Idaho |
| Premium | $4.87 | $5.42 | $0.55ID | Idaho |
| Diesel | $5.32 | $5.71 | $0.40ID | Idaho |
Where the $0.50 gap actually comes from
36% of it is tax. Nevada charges $0.18 more per gallon in federal and state taxes than Idaho. The remaining $0.32 is a real difference in what the fuel, refining and distribution cost — refinery proximity, pipeline access and state fuel-blend rules.
Fuel, refining, distribution and marginFederal and state taxes Local county and city fuel taxes are not included, and Nevada permit them. Pre-tax figures are estimates — see the note below.
What the gap is worth
Based on today’s $0.50 per-gallon difference, which moves week to week. Use the fuel cost calculator for your own mileage and vehicle.
Prices by metro area
State averages hide a lot. These are the cheapest metros AAA reports on each side.
Other comparisons
Frequently asked questions
Is gas cheaper in Idaho or Nevada?
Regular gas is cheaper in Idaho, at $4.31 a gallon against $4.81 in Nevada — a gap of $0.50, or 11.6%. On a 15-gallon fill-up that is $7.50. Figures are AAA daily state averages for 2026-08-02.
Why is gas more expensive in Nevada?
36% of the $0.50 gap is tax rather than the cost of the fuel. Nevada levies $0.18 more per gallon in federal and state taxes; the remaining $0.32 is a genuine difference in what the fuel, refining and distribution cost.
Is diesel cheaper in Idaho or Nevada?
Diesel is cheaper in Idaho at $5.32 a gallon, against $5.71 in Nevada — $0.40 a gallon apart.
Is it worth crossing from Nevada into Idaho to fill up?
If you are already near the line, yes: a 15-gallon fill saves about $7.50. Driving out of your way for it rarely pays — at $4.81 a gallon and 25 mpg, a 19-mile round trip would eat the whole saving in fuel alone, before your time.