Costco Gas Prices in Seattle, Washington
Seattle · Warehouse #1
4401 4TH AVE S, Seattle, Washington 98134-2311
Prices updated: July 22, 2026 at 3:00 PM
Regular
$4.999
PRICE PER GALLON
Press
Premium
$5.559
PRICE PER GALLON
Press
Current gas prices at Costco #1
This Costco gas station is located at 4401 4TH AVE S in Seattle, Washington. The latest reported fuel prices are regular at $4.999/gal, premium at $5.559/gal. Prices were last updated on July 22, 2026 at 3:00 PM.
Get directions to this Costco gas station30-Day Price History
30-day change
Regular
$4.999−0.100 (2.0%)
Premium
$5.559−0.140 (2.5%)
DateRegPrem
Jul 22, 3:00 PM$4.999$5.559
Jul 20, 5:00 PM$4.999$5.499
Jul 19, 4:00 PM$4.999$5.479
Jul 17, 10:00 PM$4.999$5.399
Jul 17, 4:00 PM$4.899$5.399
Jul 14, 4:00 PM$4.899$5.379
Jul 9, 5:00 PM$4.879$5.379
Jul 7, 4:00 PM$4.879$5.399
Jul 5, 6:00 PM$4.879$5.359
Jul 4, 8:00 PM$4.879$5.299
Jul 2, 11:00 PM$4.899$5.299
Jun 30, 5:00 PM$4.999$5.399
Jun 29, 4:00 PM$4.999$5.599
Jun 27, 3:00 PM$5.099$5.699