Gas Prices in Chicago, IL
Updated July 11, 2026 · AAA data · Regular unleaded
Gas Prices in Chicago
Chicago has the highest gas taxes of any major US city — state (66¢), Cook County (~6¢), and City of Chicago (~5¢) pile up to one of the heaviest tax burdens in the country. Thorntons stations consistently offer the best everyday prices within city limits; crossing into suburban Cook County saves 15-20¢.
Prices at individual stations can vary by 5–15 cents within the same city depending on brand, location, and local competition. Use apps like GasBuddy to find the cheapest station near you in Chicago.
Frequently Asked Questions
What is the gas price in Chicago right now?
The average regular unleaded price in Chicago, Illinois is $4.280/gal as of July 11, 2026. Station prices vary — expect a range of roughly $4.180 to $4.400 across the metro area.
What's the total gas tax in Chicago?
Chicago drivers pay approximately 91-95¢ per gallon in combined state, county, city, and federal taxes — more than any other major US city. The Illinois state tax alone (66¢) exceeds the total gas price in some states.
Where is cheapest gas near Chicago?
Crossing into Indiana via I-80/94 or US-30 can save 60-80¢/gallon. Hammond, Portage, and Merrillville IN are popular fill-up destinations for South Side and Southland residents. Suburban Cook County stations in Oak Park, Berwyn, or Bridgeview typically run 15-25¢ less than Chicago proper.
When is the cheapest day to buy gas in Chicago?
Nationwide data shows Monday and Tuesday tend to have slightly lower gas prices before weekly demand picks up. Avoid buying gas Thursday through Saturday when prices are typically higher.