Oregon vs Washington gas prices
Regular gas is $0.48 a gallon cheaper in Oregon — $7.19 on a 15-gallon fill-up. The two share a border, so that gap is worth knowing before you cross it.
Oregon| Grade | OR | WA | Diff. | |
|---|---|---|---|---|
| Regular | $4.65 | $5.13 | $0.48OR | Oregon |
| Midgrade | $4.91 | $5.40 | $0.49OR | Oregon |
| Premium | $5.20 | $5.67 | $0.46OR | Oregon |
| Diesel | $5.52 | $6.18 | $0.65OR | Oregon |
Where the $0.48 gap actually comes from
27% of it is tax. Washington charges $0.13 more per gallon in federal and state taxes than Oregon. The remaining $0.35 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 Pre-tax figures are estimates — see the note below.
What the gap is worth
Based on today’s $0.48 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 Oregon or Washington?
Regular gas is cheaper in Oregon, at $4.65 a gallon against $5.13 in Washington — a gap of $0.48, or 10.3%. On a 15-gallon fill-up that is $7.19. Figures are AAA daily state averages for 2026-08-02.
Why is gas more expensive in Washington?
27% of the $0.48 gap is tax rather than the cost of the fuel. Washington levies $0.13 more per gallon in federal and state taxes; the remaining $0.35 is a genuine difference in what the fuel, refining and distribution cost.
Is diesel cheaper in Oregon or Washington?
Diesel is cheaper in Oregon at $5.52 a gallon, against $6.18 in Washington — $0.65 a gallon apart.
Is it worth crossing from Washington into Oregon to fill up?
If you are already near the line, yes: a 15-gallon fill saves about $7.19. Driving out of your way for it rarely pays — at $5.13 a gallon and 25 mpg, a 18-mile round trip would eat the whole saving in fuel alone, before your time.