Costco St Charles Gas Prices – Saint Charles, IL
- Regular · today
- $4.539▼ −$0.060
- Premium · today
- $5.539▼ −$0.110
USD per gallon · Last updated September 30, 2026 · This station does not sell diesel
221 S Randall Rd, Saint Charles, IL 60174-1524 · Open in Maps ↗
30-day range
where today sits- Regular$4.539 today · avg $4.391$3.999 low$4.899 high
- Premium$5.539 today · avg $5.403$4.999 low$5.859 high
Price history at St Charles
Last 30 days · USD per gallonView data as table
| Date | Regular | Premium |
|---|---|---|
| Sep 1 | $3.999 | $4.999 |
| Sep 2 | $3.999 | $4.999 |
| Sep 3 | $3.999 | $4.999 |
| Sep 4 | $3.999 | $4.999 |
| Sep 5 | $4.059 | $4.999 |
| Sep 6 | $4.099 | $5.099 |
| Sep 7 | $3.999 | $5.099 |
| Sep 8 | $3.999 | $5.099 |
| Sep 9 | $3.999 | $5.099 |
| Sep 10 | $3.999 | $5.099 |
| Sep 11 | $3.999 | $5.099 |
| Sep 12 | $4.099 | $5.199 |
| Sep 13 | $4.199 | $5.299 |
| Sep 14 | $4.199 | $5.299 |
| Sep 15 | $4.379 | $5.359 |
| Sep 16 | $4.479 | $5.499 |
| Sep 17 | $4.579 | $5.599 |
| Sep 18 | — | — |
| Sep 19 | $4.899 | $5.859 |
| Sep 20 | $4.899 | $5.859 |
| Sep 21 | $4.899 | $5.859 |
| Sep 22 | $4.899 | $5.799 |
| Sep 23 | $4.849 | $5.759 |
| Sep 24 | $4.789 | $5.729 |
| Sep 25 | $4.749 | $5.699 |
| Sep 26 | $4.749 | $5.699 |
| Sep 27 | $4.699 | $5.699 |
| Sep 28 | $4.699 | $5.699 |
| Sep 29 | $4.599 | $5.649 |
| Sep 30 | $4.539 | $5.539 |
Last updated September 30, 2026. Prices are collected once daily and can lag same-day changes at the pump.
Today’s price in context
At $4.539 for Regular, St Charles is the 11th most expensive of 24 Costco gas stations in Illinois today, in line with the Illinois average of $4.526.
Bloomingdale, 10.9 mi away, is $0.340 cheaper.
- vs the US average
- $0.067 below, at $4.606
- Premium over Regular
- $1.000 — the Illinois median is $1.105
- Over the last 30 days
- up $0.540
- Days the price changed
- 15 of 29 reported days
- Cheapest day in the window
- September 11, 2026, at $3.999
- 15-gallon fill
- $68.08, $8.10 more than at the 30-day low
- Nearest cheaper station
- Bloomingdale — 10.9 mi
St Charles is located at 221 S Randall Rd, Saint Charles, IL 60174-1524, in Illinois. The gas station sits in the warehouse parking lot and is open to Costco members, selling Regular and Premium — this location does not sell diesel. Gas station hours are 6 a.m. – 10 p.m. on weekdays, 6 a.m. – 8:30 p.m. on Saturdays and 6 a.m. – 7:30 p.m. on Sundays, in local time.
Station details
Saint Charles Gas station hours
- Mon–Fri
- 6 a.m. – 10 p.m.
- Saturday
- 6 a.m. – 8:30 p.m.
- Sunday
- 6 a.m. – 7:30 p.m.
Saint Charles Warehouse hours
- Mon–Fri
- 10 a.m. – 8:30 p.m.
- Saturday
- 9:30 a.m. – 7 p.m.
- Sunday
- 10 a.m. – 6 p.m.
Costco gas near St Charles
- 1BloomingdaleBloomingdale, IL · 10.9 mi$4.199Regular
- 2NapervilleNaperville, IL · 13.3 mi$4.389Regular
- 3NE NapervilleNaperville, IL · 13.6 mi$4.579Regular
- 4YorkvilleYorkville, IL · 17.8 mi$4.389Regular
- 5SchaumburgSchaumburg, IL · 18.4 mi$4.459Regular
Distances are straight-line. Prices across the border are shown in that country’s units (¢ per litre).
Cities near Saint Charles
- Costco gas prices Bloomingdale · IL · 11 mi$4.199
- Costco gas prices Naperville · IL · 13 mi$4.484
- Costco gas prices Yorkville · IL · 18 mi$4.389
- Costco gas prices Schaumburg · IL · 18 mi$4.459
- Costco gas prices Lake In The Hills · IL · 19 mi$4.499
- Costco gas prices Oak Brook · IL · 20 mi$4.299
- Costco gas prices Bolingbrook · IL · 20 mi$4.699
- Costco gas prices Lake Zurich · IL · 23 mi$4.499
At this location
- Warehouse opened
- November 2008
- Warehouse phone
- (630) 549-2024
- Pumps open before the warehouse
- 4 hours on weekdays
Also at this warehouse: a food court, a pharmacy, an optical department and a tire center.
Costco publishes one number per warehouse; there is no separate line for the gas station.
Frequently asked questions
How much is gas at Costco St Charles today?
As of the September 30, 2026 reading: Regular $4.539 and Premium $5.539 per gallon. Prices are collected once a day, so the pump can differ.
What time does the Costco St Charles gas station open?
The pumps are open 6 a.m. – 10 p.m. weekdays, 6 a.m. – 8:30 p.m. Saturdays and 6 a.m. – 7:30 p.m. Sundays, in local time. The pumps open 4 hours before the warehouse on weekdays.
Does the Costco St Charles gas station sell diesel?
No — this station sells Regular and Premium, and has reported no diesel price in the last 30 days.
Is Costco St Charles cheaper than the average Costco station in Illinois?
Not meaningfully: at $4.539, Regular here is level with the Illinois Costco average of $4.526.
Where is the Costco St Charles gas station?
At 221 S Randall Rd, Saint Charles, IL 60174-1524. It sits in the Costco warehouse parking lot and is open to members only.
Do you need a Costco membership to buy gas?
Yes — a Gold Star, Executive or Business membership card has to be scanned at the pump before it will dispense, though a Costco Shop Card also works for non-members.
What payment methods does the Costco gas station accept?
Visa, PIN debit and the Costco Shop Card; US Costco fuel pumps take no cash and no Mastercard, American Express or Discover.
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