Costco Gas Prices in Mount Prospect, Illinois
Mt Prospect · Warehouse #779
999 N ELMHURST RD, Mount Prospect, Illinois 60056-1133
Prices updated: July 22, 2026 at 1:00 PM
Regular
$3.999
PRICE PER GALLON
Press
Premium
$5.199
PRICE PER GALLON
Press
Current gas prices at Costco #779
This Costco gas station is located at 999 N ELMHURST RD in Mount Prospect, Illinois. The latest reported fuel prices are regular at $3.999/gal, premium at $5.199/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
$3.999+0.140 (3.6%)
Premium
$5.199+0.300 (6.1%)
DateRegPrem
Jul 22, 1:00 PM$3.999$5.199
Jul 21, 2:00 PM$3.999$5.099
Jul 20, 3:00 PM—$5.099
Jul 20, 2:00 PM$3.999$5.099
Jul 20, 6:00 AM—$5.099
Jul 20, 5:00 AM$3.999$5.099
Jul 19, 12:00 AM—$5.099
Jul 18, 11:00 PM$3.999$5.099
Jul 17, 3:00 PM$3.899$5.049
Jul 15, 2:00 PM$3.849$4.949
Jul 14, 3:00 PM$3.899$4.999
Jul 13, 3:00 PM$3.999$5.099
Jul 10, 9:00 PM$3.999$4.999
Jul 10, 3:00 PM$3.899$4.899
Jul 9, 10:00 PM$3.789$4.799
Jul 9, 3:00 PM$3.699$4.699
Jul 8, 6:00 PM$3.599$4.699
Jul 7, 11:00 PM$3.559$4.699
Jul 7, 9:00 PM$3.659$4.799
Jul 7, 3:00 PM$3.699$4.799
Jul 6, 3:00 PM$3.799$4.859
Jul 5, 4:00 PM$3.799$4.849
Jul 3, 3:00 PM$3.839$4.849
Jul 2, 3:00 PM$3.859$4.849
Jul 2, 2:00 AM$3.789$4.799
Jun 29, 2:00 PM$3.789$4.859
Jun 27, 8:00 PM$3.749$4.859
Jun 26, 2:00 PM$3.799$4.859
Jun 24, 8:00 PM$3.799$4.899
Jun 24, 1:00 PM$3.859$4.899
Jun 23, 9:00 PM$3.899$4.999
Jun 23, 1:00 PM$3.899$4.959
Jun 22, 4:00 PM$3.859$4.899