Illinois has 24 Costco warehouses, including 1 with diesel fuel and 24 with gasoline. Use our interactive map to search by ZIP code or city, or browse the diesel station list below.
→ Search for Costco stations near you in Illinois
With 24 Costco warehouses across Illinois — concentrated heavily in the Chicago metropolitan area but extending to Springfield, Peoria, and the St. Louis metro — Costco offers some of the most competitive gas prices in the state. Illinois members routinely save 10 to 30 cents per gallon compared to Shell, BP, and Mobil stations, particularly in the Chicago area where fuel taxes and city-mandated ethanol requirements push prices higher than the national average.
Chicago has some of the highest gas prices in the Midwest due to a combination of city fuel taxes, reformulated gas requirements, and Lake Michigan shipping logistics. Costco locations in the suburbs — including Naperville, Schaumburg, Oak Brook, and Lombard — offer an escape from city-center pricing. Illinois fuel prices also fluctuate with seasonal blend changes required by the EPA. Use our interactive map to find the nearest Costco station.
Illinois currently has 1 Costco location with diesel fuel. While diesel availability at Costco is limited in Illinois, the state's diesel market is well-served by truck stops along major interstates like I-80, I-55, and I-57. The existing Costco diesel station offers the same high-quality ultra-low sulfur diesel available at Costco locations nationwide.
Illinois diesel drivers — particularly those in the Chicago area's large commercial trucking industry — may find better diesel coverage at TravelCenters of America, Petro, and Love's locations along the tollways. When comparing options, our Costco diesel vs. Shell diesel comparison covers quality and pricing differences. For diesel engine maintenance through Illinois' cold winters, cold-weather fuel additives are essential to prevent fuel gelling.
Costco gas stations in Illinois generally operate from 6:00 AM to 10:00 PM on weekdays, with weekend hours typically 6:00 AM to 9:00 PM. Chicago-area locations can experience heavy traffic during rush hours and weekends. A Costco membership is required to purchase fuel. Executive members receive 2% cashback on gas (annual cap of $1,000), which is especially beneficial for Illinois drivers facing above-average fuel costs in the Chicago market.
For complete details on membership options, accepted payment methods, and fuel station policies, visit our FAQ page.
Every Costco warehouse in Illinois that offers diesel fuel:
| Warehouse | Address | Phone | Diesel Hours |
|---|---|---|---|
| Costco Warehouse - Melrose Park | 8400 W North Ave, Melrose Park, IL | (708) 397-2905 | See station details |
Costco fuel stations consistently offer some of the lowest diesel prices in Illinois. Costco members can save significantly on diesel for trucks, RVs, and commercial vehicles. Diesel at Costco is typically high-quality, additized ultra-low sulfur diesel (ULSD).