Costco Gas Prices in Mount Prospect, Illinois
Mt Prospect · Warehouse #779
999 N ELMHURST RD, Mount Prospect, Illinois 60056-1133
Prices updated: August 18, 2026 at 3:00 AM
Regular
$4.199
PRICE PER GALLON
Press
Premium
$5.299
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 $4.199/gal, premium at $5.299/gal. Prices were last updated on August 18, 2026 at 3:00 AM.
Get directions to this Costco gas station30-Day Price History
30-day change
Regular
$4.199+0.200 (5.0%)
Premium
$5.299+0.200 (3.9%)
DateRegPrem
Aug 18, 3:00 AM$4.199$5.299
Aug 17, 11:00 PM$4.199$5.249
Aug 17, 4:00 PM$4.199$5.299
Aug 14, 2:00 PM—$5.299
Aug 14, 1:00 PM$4.199$5.299
Aug 13, 3:00 PM$4.099$5.199
Aug 12, 11:00 PM$4.049$5.199
Aug 12, 3:00 PM$4.049$5.149
Aug 12, 3:00 AM—$5.149
Aug 12, 2:00 AM$4.049$5.149
Aug 11, 10:00 PM$4.049$5.099
Aug 10, 6:00 PM—$5.099
Aug 10, 5:00 PM$4.049$5.099
Aug 10, 4:00 PM$4.049$5.159
Aug 9, 3:00 PM$4.049$5.179
Aug 8, 4:00 PM$4.099$5.229
Aug 7, 3:00 PM—$5.229
Aug 7, 2:00 PM$4.099$5.229
Aug 6, 6:00 AM—$5.229
Aug 6, 5:00 AM$4.099$5.229
Aug 3, 4:00 PM$4.159$5.229
Jul 31, 3:00 PM$4.199$5.239
Jul 29, 3:00 PM$4.149$5.239
Jul 29, 12:00 AM$4.149$5.229
Jul 28, 5:00 PM$4.149$5.199
Jul 27, 3:00 PM$4.199$5.299
Jul 24, 4:00 PM$4.159$5.299
Jul 23, 8:00 PM—$5.299
Jul 23, 7:00 PM$4.159$5.299
Jul 23, 3:00 PM$4.059$5.259
Jul 22, 9:00 PM$3.999$5.259
Jul 22, 3:00 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