Costco gas prices in Washington
Washington average
- Regular
- $4.645
- Premium
- $5.223
- Diesel
- $5.631
Average across 33 stations, per gallon · updated July 22, 2026
Costco has 33 gas stations in Washington — the cheapest regular today is $3.999/gal at Costco Clarkston in Clarkston. Washington Costco regular prices have fallen about $0.182 per gallon over the past month, from $4.827 to $4.645. Premium is down $0.102 over the same stretch, now at $5.223. Diesel is down $0.074 over the same stretch, now at $5.631.
Gas stations
33
Washington
Avg regular
$4.645
per gallon, USD
Cheapest now
$3.999
Costco Clarkston
30-day price trend
Regular$4.645Premium$5.223Diesel$5.631
View price history as a table
| Date | Regular | Premium | Diesel |
|---|---|---|---|
| July 22, 2026 | $4.645 | $5.223 | $5.631 |
| July 21, 2026 | $4.634 | $5.192 | $5.602 |
| July 20, 2026 | $4.621 | $5.154 | $5.543 |
| July 19, 2026 | $4.607 | $5.144 | $5.512 |
| July 18, 2026 | $4.601 | $5.140 | $5.472 |
| July 17, 2026 | $4.591 | $5.132 | $5.443 |
| July 16, 2026 | $4.568 | $5.112 | $5.385 |
| July 15, 2026 | $4.564 | $5.110 | $5.377 |
| July 14, 2026 | $4.567 | $5.111 | $5.368 |
| July 13, 2026 | $4.573 | $5.112 | $5.360 |
| July 12, 2026 | $4.563 | $5.108 | $5.354 |
| July 11, 2026 | $4.565 | $5.110 | $5.352 |
| July 10, 2026 | $4.586 | $5.124 | $5.346 |
| July 9, 2026 | $4.556 | $5.096 | $5.327 |
| July 8, 2026 | $4.539 | $5.078 | $5.302 |
| July 7, 2026 | $4.544 | $5.091 | $5.317 |
| July 6, 2026 | $4.571 | $5.116 | $5.321 |
| July 5, 2026 | $4.584 | $5.122 | $5.329 |
| July 4, 2026 | $4.564 | $5.107 | $5.329 |
| July 3, 2026 | $4.580 | $5.121 | $5.360 |
| July 2, 2026 | $4.611 | $5.129 | $5.391 |
| July 1, 2026 | $4.634 | $5.145 | $5.452 |
| June 30, 2026 | $4.668 | $5.180 | $5.519 |
| June 29, 2026 | $4.701 | $5.221 | $5.539 |
| June 28, 2026 | $4.711 | $5.226 | $5.570 |
| June 27, 2026 | $4.719 | $5.242 | $5.579 |
| June 26, 2026 | $4.749 | $5.257 | $5.588 |
| June 25, 2026 | $4.783 | $5.277 | $5.647 |
| June 24, 2026 | $4.798 | $5.303 | $5.668 |
| June 23, 2026 | $4.827 | $5.324 | $5.706 |
Cities with multiple stations
All stations in Washington
All 33 stations, sorted by regular price from lowest to highest. Prices in $/gal.
| Rank | Station | Regular | Premium | Diesel |
|---|---|---|---|---|
| 1 | Costco ClarkstonClarkston | $3.999 | $4.599 | $4.959 |
| 2 | Costco BellinghamBellingham | $4.279 | $4.999 | $5.299 |
| 3 | Costco Union GapUnion Gap | $4.299 | $4.759 | — |
| 4 | Costco Burlington WABurlington | $4.359 | $4.999 | — |
| 5 | Costco N SpokaneSpokane | $4.359 | $4.899 | $5.559 |
| 6 | Costco SpokaneSpokane | $4.359 | $4.899 | — |
| 7 | Costco TacomaTacoma | $4.359 | $4.999 | — |
| 8 | Costco E Vancouver WACamas | $4.459 | $4.999 | — |
| 9 | Costco PuyallupPuyallup | $4.459 | $5.299 | — |
| 10 | Costco TumwaterTumwater | $4.459 | $4.999 | — |
| 11 | Costco Marysville WAMarysville | $4.499 | $4.799 | — |
| 12 | Costco Vancouver WAVancouver | $4.499 | $4.999 | $5.499 |
| 13 | Costco WenatcheeEast Wenatchee | $4.559 | $5.199 | — |
| 14 | Costco KennewickKennewick | $4.599 | $5.159 | — |
| 15 | Costco LaceyLacey | $4.599 | $5.299 | $5.699 |
| 16 | Costco RichlandRichland | $4.599 | $5.199 | $5.699 |
| 17 | Costco RidgefieldRidgefield | $4.599 | $5.099 | — |
| 18 | Costco Federal WayFederal Way | $4.659 | $5.199 | — |
| 19 | Costco Everett WAEverett | $4.699 | $5.299 | — |
| 20 | Costco Bonney LakeBonney Lake | $4.729 | $5.359 | $6.099 |
| 21 | Costco Lake StevensLake Stevens | $4.769 | $5.399 | — |
| 22 | Costco Aurora VillageShoreline | $4.799 | $5.299 | — |
| 23 | Costco IssaquahIssaquah | $4.799 | $5.499 | — |
| 24 | Costco LynnwoodLynnwood | $4.799 | $5.299 | $5.869 |
| 25 | Costco Covington WACovington | $4.859 | $5.499 | — |
| 26 | Costco WoodinvilleWoodinville | $4.879 | $5.539 | $5.699 |
| 27 | Costco KirklandKirkland | $4.899 | $5.299 | — |
| 28 | Costco RedmondRedmond | $4.899 | $5.399 | $5.599 |
| 29 | Costco SilverdaleSilverdale | $4.899 | $5.599 | $5.599 |
| 30 | Costco Gig HarborGig Harbor | $4.969 | $5.599 | — |
| 31 | Costco SeattleSeattle | $4.999 | $5.559 | — |
| 32 | Costco TukwilaTukwila | $4.999 | $5.499 | $5.999 |
| 33 | Costco SequimSequim | $5.299 | $5.799 | — |
Showing 1–10 of 33 stations