Weekly area comparison
Gas prices in Sammamish
Dated weekly regular-gasoline average in Washington, with a trend and U.S. comparison. Not a live station price.
Average regular gas · Washington
$5.42/gal
Week of October 5, 2026 · down 3¢ from the week before, up 17¢ across 6 weekly observations
- West Coast less California$5.1231¢ less than Washington
- U.S. average$4.35107¢ less than Washington
- $5.26Aug 31
- $5.48Sep 7
- $5.50Sep 14
- $5.52Sep 21
- $5.45Sep 28
- $5.42Oct 5
Source: U.S. Energy Information Administration, weekly retail gasoline prices (regular, all formulations, including taxes). Averages for the area, not a price at any one station.
Save on gas in Sammamish
- Check the posted pump price and any payment or membership conditions before filling up.
- Compare available station prices along your route; the regional average is not a quote for a particular station.
- If a station advertises a discount, check its eligibility and payment terms.
- Planning a drive? See getting around Sammamish and our commute page.
Questions
What is the weekly EIA gas-price comparison for Sammamish?
For the week of October 5, 2026, regular gasoline averaged $5.42 a gallon in the EIA Washington survey area, compared with $4.35 nationally. This is a statewide comparison, not a separate average for Sammamish or a live station price.
Where does the weekly average come from?
From the U.S. Energy Information Administration’s weekly survey of retail gasoline prices, published every Monday. This page uses Washington as a statewide comparison. It is not a separate average for Sammamish.
Why is the price at my Sammamish station different?
Stations set their own prices, and this is an average across many stations for the whole area. Brand, location, cash or card and membership discounts all change the price at the pump.
When do these numbers update?
EIA publishes new averages each Monday afternoon (Tuesday after a Monday holiday). This page checks for the new week twice a day.