Gas prices in Washington
EIA surveyed Washington at $5.20 per gallon for regular gasoline in the week of October 26, 2026, 93 cents above the US average of $4.27.
On-highway diesel for West Coast less California is $6.61, 26 cents above the US diesel average of $6.35. EIA runs the diesel survey for California and the regions only, so every other state carries its district figure here. Climate Commitment Act allowance pass-through adds an estimated 30 to 40 cents per gallon.
[EIA state series] Series EMM_EPMR_PTE_SWA_DPG · State excise: 49.4 cents/gal · PADD 5
Washington's pump-price cost stack
Every gallon breaks down into five named slices. Applying the shares to the $5.20 figure above, and to Washington's own excise rate, the stack looks like this:
Crude / refining / distribution shares estimated from EIA Petroleum Marketing Monthly. Federal excise from FHWA Highway Statistics. State excise from the API Motor Fuel Tax Map and Tax Foundation 2026. [EIA · 26 Oct 2026] [API · 26 Oct 2026]
Border-state comparison
How the neighbours read in the same survey week. Neighbours inside the same EIA district carry the same published figure, which is why several rows can match exactly.
Use the border comparator to compute the per-tank difference where the two states fall in different EIA districts.
Metro-level EIA series for Washington
EIA runs a separate weekly retail survey in one metro area inside Washington:
- Seattle $5.424/gal EMM_EPMR_PTE_Y48SE_DPG
FAQ
What is the current average price of regular gas in Washington?
EIA surveyed Washington at $5.20 per gallon for regular gasoline in the week of October 26, 2026, 93 cents above the US average of $4.27. [EIA state series]
Does EIA publish a price for Washington?
Yes. Washington is one of the nine states with its own weekly retail gasoline series, EMM_EPMR_PTE_SWA_DPG.
What is Washington's state gas tax?
49.4 cents per gallon state excise, plus the 18.4 cents federal excise. [API · 26 Oct 2026]