Costco Washington Gas Prices
Find the cheapest Costco gas in Washington— every fuel center ranked by today's price.
33 Costco fuel centers in 32 cities · 12 of 33 sell diesel
Costco operates 33 fuel centers in Washington across 32 cities, with the largest cluster in Spokane (2 stations). Across the state, regular gas averages $4.893, premium runs about $0.565 higher at $5.458, and diesel sits at $6.068. The lowest-priced regular pump is at Costco Clarkston in Clarkston at $4.499, while Tukwila in Tukwila sits about $0.800 higher. Across the state, regular pump prices have climbed about $0.172 over the past month, from $4.721 a month ago. Premium has climbed about $0.076 and diesel has climbed about $0.248 over the same period. Diesel is sold at 12 of the 33 Washington locations.
If your vehicle takes premium, the lowest in Washington is Costco Clarkston in Clarkston at $4.949. The cheapest diesel is at Costco Clarkston in Clarkston at $5.599. Pump prices shift from one warehouse to the next with local taxes, fuel-blend rules, and transport costs, but Costco fuel is members-only and usually runs below nearby branded stations — which is what keeps these pumps busy.
30-day Washington average price trend
Browse Washington cities
All Washington stations by price
| Station | Regular | Premium |
|---|---|---|
| Clarkston Clarkston | $4.499 | $4.949 |
| Bellingham Bellingham | $4.579 | $5.299 |
| Vancouver Vancouver | $4.599 | $5.199 |
| Puyallup Puyallup | $4.629 | $5.499 |
| E Vancouver Camas | $4.639 | $5.229 |
| Ridgefield Ridgefield | $4.659 | $5.399 |
| Union Gap Union Gap | $4.699 | $5.099 |
| Burlington Burlington | $4.759 | $5.229 |
| Tacoma Tacoma | $4.759 | $5.259 |
| Lake Stevens Lake Stevens | $4.799 | $5.399 |