Why is gas cheaper in Iowa than Illinois?
Why is gas cheaper in Iowa than Illinois? Less taxes and more competition in the Iowa Quad-Cities are driving down gas prices more quickly than in Illinois. In Illinois, the state tax per gallon is 19 cents, while Iowa's is 20.5 cents. The difference comes in sales tax, where Iowa has exempted gas, but Illinois hasn't. How many gallons of gas do I need to travel? From there, it's possible to figure out roughly many gallons of gas the trip will require. For example, if the route is 300 miles long – most of which you plan to cover on...