Current fuel prices for Illinois (IL) — Updated June 3, 2026
Illinois, particularly Chicago, has some of the highest gas taxes in the Midwest. The city adds additional local taxes that can make Chicago gas among the priciest in the region.
Prices shown reflect the current average for Illinois regular unleaded gasoline. Gas prices fluctuate daily based on crude oil markets, refinery output, seasonal demand, and state tax adjustments. Illinois drivers typically fill up 4 times per month, making it important to know when and where prices are lowest.
Finding cheap gas in Illinois requires knowing when and where to look. Here are proven strategies for Illinois drivers:
Best day to buy: Studies show that Tuesday and Wednesday typically offer the lowest gas prices across Illinois. Prices often rise on Thursday ahead of the weekend and peak on Friday and Saturday when demand is highest.
Use gas price apps: GasBuddy, Waze, and Google Maps all show current prices at nearby stations. Illinois has a competitive gas market with frequent price changes, making real-time tracking valuable.
Loyalty programs: Many Illinois grocery chains and gas stations offer fuel rewards. Programs like Kroger/Kroger fuel, Shell Fuel Rewards, and BPme Rewards can save $0.05–$0.25 per gallon regularly.
Fill up at Chicago: Chicago typically offers the most competitive gas prices in Illinois due to higher competition among stations. Rural Illinois areas often charge a premium.
Data source: Estimate • Last updated: June 3, 2026
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