Gas prices in Washington today
Regular gas in Washington averages $5.31 a gallon, 25% more than the U.S. average of $4.27. That makes Washington one of the most expensive: rank 49 of 51 (1 = cheapest).
| Grade | Washington | U.S. average | 15-gallon fill-up |
|---|---|---|---|
| Regular | $5.31 | $4.27 | $80 |
| Mid-grade | $5.59 | $4.78 | $84 |
| Premium | $5.83 | $5.17 | $87 |
| Diesel | $7.30 | $6.35 | $109 |
Source: AAA, Washington average gas prices and AAA State Gas Price Averages, as of Oct 24, 2026. Fill-up = price × 15 gallons (our calculation). For metro-area prices, see AAA's Washington page.
Taxes in the price: 60.2¢ a gallon in Washington state taxes and fees plus the 18.4¢ federal tax, 78.6¢ in all, about 15% of today's price (Tax Foundation, July 2026; our calculation). Gas tax in Washington.
What driving costs in Washington
At $5.31 a gallon, a car that gets 27.2 mpg (the EPA's average for new vehicles) spends about $195 on gas every 1,000 miles, or 19.5 cents a mile (our calculation). Charging an electric car at Washington's average home electricity price costs about $45 for the same 1,000 miles. Gas is only one part of the bill: full-coverage car insurance in Washington averages $2,208 a year.
Planning a drive? The road trip cost calculator uses today's gas price, and the true cost of owning a car puts fuel next to insurance, repairs and depreciation.
Common questions
What is the average gas price in Washington today?
Regular gas in Washington averaged $5.31 a gallon on Oct 24, 2026, per AAA. Mid-grade was $5.59, premium $5.83 and diesel $7.30.
Is gas in Washington cheaper than the national average?
No. Washington's $5.31 is 25% more than the U.S. average of $4.27, which ranks it 49 of 51 states and DC (1 = cheapest, our ranking of AAA data).
How much does it cost to fill up a car in Washington?
About $80 for 15 gallons of regular at today's Washington average (our calculation). Driving 1,000 miles in a car that gets 27.2 mpg costs about $195 in gas.
Is an electric car cheaper to run than gas in Washington?
At Washington's average home electricity price, charging an EV for 1,000 miles costs about $45, compared with about $195 in gas for a 27.2 mpg car (our calculation from EIA and AAA prices, 31 kWh per 100 miles from fueleconomy.gov).
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