Kent is 138% more expensive than Springfield.
When comparing Kent, WA and Springfield, IL, the overall cost of living indices are 145 and 61 respectively (national median = 100). Rent is $888/month cheaper in Springfield, saving renters about $10,656/year.
Median household income is $24,879/year higher in Kent. Home values also differ significantly — the median in Kent is $537,500 compared to $155,200 in Springfield.
Washington has no state income tax, giving Kent residents a significant tax advantage over Illinois's 4.95% rate.
Kent vs Springfield — common questions
Other cost of living comparisons for Kent and Springfield