Costco Gas Prices in Thornton, Colorado
Thornton · Warehouse #629
16375 N. WASHINGTON ST, Thornton, Colorado 80023-8907
Prices updated: July 22, 2026 at 1:00 PM
Regular
$3.699
PRICE PER GALLON
Press
Premium
$4.399
PRICE PER GALLON
Press
Current gas prices at Costco #629
This Costco gas station is located at 16375 N. WASHINGTON ST in Thornton, Colorado. The latest reported fuel prices are regular at $3.699/gal, premium at $4.399/gal. Prices were last updated on July 22, 2026 at 1:00 PM.
Get directions to this Costco gas station30-Day Price History
30-day change
Regular
$3.699+0.340 (10.1%)
Premium
$4.399+0.400 (10.0%)
DateRegPrem
Jul 22, 1:00 PM$3.699$4.399
Jul 21, 10:00 PM$3.699$4.329
Jul 20, 6:00 PM—$4.329
Jul 20, 5:00 PM$3.699$4.329
Jul 19, 2:00 AM—$4.329
Jul 19, 1:00 AM$3.699$4.329
Jul 18, 4:00 PM$3.639$4.299
Jul 17, 10:00 PM$3.539$4.259
Jul 17, 3:00 PM$3.499$4.199
Jul 16, 10:00 PM$3.439$4.099
Jul 16, 2:00 PM$3.399$4.099
Jul 12, 5:00 PM$3.459$4.149
Jul 10, 3:00 PM$3.459$4.059
Jul 9, 10:00 PM$3.399$4.059
Jul 9, 4:00 PM$3.299$3.959
Jul 8, 8:00 PM$3.199$3.859
Jul 8, 4:00 PM$3.179$3.779
Jul 7, 10:00 PM$3.199$3.799
Jul 7, 4:00 PM$3.249$3.849
Jul 6, 4:00 PM$3.299$3.899
Jul 5, 6:00 PM$3.349$3.949
Jul 3, 4:00 PM$3.399$3.999
Jul 2, 12:00 AM$3.299$3.899
Jul 1, 8:00 PM$3.249$3.859
Jul 1, 4:00 PM$3.249$3.799
Jun 30, 10:00 PM$3.199$3.799
Jun 29, 3:00 PM$3.159$3.759
Jun 28, 4:00 PM$3.249$3.839
Jun 24, 10:00 PM$3.329$3.949
Jun 24, 3:00 PM$3.349$3.949
Jun 23, 3:00 PM$3.359$3.999