Washington is 200% more expensive than Rockford.
When comparing Washington, DC and Rockford, IL, the overall cost of living indices are 171 and 57 respectively (national median = 100). Rent is $946/month cheaper in Rockford, saving renters about $11,352/year.
Median household income is $52,959/year higher in Washington. Home values also differ significantly — the median in Washington is $724,600 compared to $120,900 in Rockford.
Illinois has a lower income tax rate, making Rockford slightly more tax-friendly.
Washington vs Rockford — common questions
Other cost of living comparisons for Washington and Rockford