The average Illinois price for a gallon of regular unleaded is $2.38. This is seven cents more expensive than last week's average.
AAA reports the most expensive gas can be found in the City of Chicago, at $2.66 per gallon. By contrast, the cheapest gas is located in Springfield, at $2.23 per gallon.
Rockford's average per-gallon price is $2.28, which is 6 cents more expensive than last week.