Costco Washington Gas Prices
Find the cheapest Costco gas in Washington— every fuel center ranked by today's price.
34 Costco fuel centers in 32 cities · 12 of 34 sell diesel
Costco operates 34 fuel centers in Washington across 32 cities, with the largest cluster in Lynnwood (2 stations). Across the state, regular gas averages $4.944, premium runs about $0.577 higher at $5.521, and diesel sits at $6.942. The lowest-priced regular pump is at Costco Bellingham in Bellingham at $4.559, while Sequim in Sequim sits about $0.700 higher. Across the state, regular pump prices have eased about $0.197 over the past month, from $5.141 a month ago. Premium has eased about $0.196 and diesel has eased about $0.060 over the same period. Diesel is sold at 12 of the 34 Washington locations.
If your vehicle takes premium, the lowest in Washington is Costco Bellingham in Bellingham at $5.099. The cheapest diesel is at Costco Clarkston in Clarkston at $6.599. 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 |
|---|---|---|
| Bellingham Bellingham | $4.559 | $5.099 |
| E Vancouver Camas | $4.559 | $5.149 |
| Vancouver Vancouver | $4.559 | $5.159 |
| Clarkston Clarkston | $4.599 | $5.299 |
| Union Gap Union Gap | $4.659 | $5.199 |
| Tacoma Tacoma | $4.749 | $5.399 |
| Burlington Burlington | $4.759 | $5.399 |
| Tumwater Tumwater | $4.759 | $5.359 |
| Federal Way Federal Way | $4.799 | $5.499 |
| Ridgefield Ridgefield | $4.799 | $5.359 |