The average Illinois price for a gallon of regular unleaded gasoline is $2.64. This is 5 cents more expensive than last week.
AAA reports that the most expensive gas is found in the City of Chicago, at $2.89 per gallon. By contrast, the lowest per-gallon price is available in Decatur, at $2.42. Rockford's average price is $2.55 per gallon. This is one cent lower than last week.