Chicago is 64% more expensive than Springfield.
When comparing Chicago, IL and Springfield, IL, the overall cost of living indices are 100 and 61 respectively (national median = 100). Rent is $435/month cheaper in Springfield, saving renters about $5,220/year.
Median household income is $9,597/year higher in Chicago. Home values also differ significantly — the median in Chicago is $315,200 compared to $155,200 in Springfield.
Both cities share the same state tax structure since they are in Illinois.
Chicago vs Springfield — common questions
Other cost of living comparisons for Chicago and Springfield