The average Illinois price for a gallon of regular unleaded is $2.29. This is identical to last week's average.
AAA reports the most expensive gas is in the City of Chicago, at $2.62 per gallon. By contrast, the least expensive gas is in Springfield, at an average per-gallon price of $2.05.
Rockford's average gas price is $2.25. This is eight cents more expensive than last week's average.