The average Illinois price for a gallon of regular unleaded is $2.22. This is ten cents more expensive than last week's average, according to AAA.
The state's most expensive gas can be found in the city of Chicago, at $2.56 per gallon. By contrast, Danville has the cheapest gas, at a price of $1.97 per gallon.
Rockford's average per-gallon price is $2.13.
