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Gas Prices in Illinois

Live gas prices updated daily — regular, mid-grade, premium & diesel

// Live Prices Today
ILLINOIS GAS PRICES

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// Price History
HOW PRICES HAVE CHANGED

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// County Breakdown
ILLINOIS — COUNTY PRICES

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Browse Gas Prices by State

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CASH BACK APPS FOR ILLINOIS DRIVERS
Upside
Cash Back on Gas

Earn real cash back every time you fill up in Illinois. Works at thousands of stations nationwide.

⭐ New User Bonus — Click to Reveal
GasBuddy
Crowdsourced Prices

Find the cheapest gas stations near you in Illinois with real-time crowdsourced prices.

⭐ New User Bonus — Click to Reveal
Fetch Rewards
Receipt Cash Back

Earn points on every gas receipt in Illinois. Redeem for gift cards and real cash.

⭐ New User Bonus — Click to Reveal
Ibotta
Cash Back on Gas & More

Real cash back at gas stations across Illinois. Withdraw via PayPal or Venmo anytime.

⭐ New User Bonus — Click to Reveal

About Gas Prices in Illinois

Gas prices in Illinois are updated daily using live data from thousands of stations statewide. Our prices reflect current averages for regular unleaded, mid-grade, premium, and diesel fuel across all counties.

To find the cheapest gas in Illinois, use the county breakdown above to identify which areas currently have the lowest prices. Combine this with cash back apps like Upside and GasBuddy to maximize your savings on every fill-up.

Gas prices in Illinois — like all U.S. states — typically follow a weekly cycle, with prices lowest on Tuesday and Wednesday mornings before rising ahead of the weekend. Timing your fill-up mid-week can save you an additional 5–10¢ per gallon on average.