Median one-bedroom rent across the cities we track is $1,305 in Colorado versus $1,258 in Illinois. Overall, Illinois runs roughly 4% cheaper on rent than Colorado, its main day-to-day cost driver.
Median household income across tracked cities is $85,364 in Colorado and $75,134 in Illinois — about 12% higher in Colorado. Colorado has a top state income tax rate of 4.40% and a 2.9% state sales tax; Illinois has a top state income tax rate of 4.95% and a 6.25% state sales tax.
State Taxes
Sales Tax
2.9%
6.25%
+3.4 pp in Illinois
Income Tax (top rate)
4.40%
4.95%
+0.5 pp in Illinois
Housing (median across tracked cities)
Median 1BR Rent
$1,305
$1,258
+4% in Colorado
Median Home Value
$586,700
$315,200
+46% in Colorado
Income (median across tracked cities)
Median Household Income
$85,364
$75,134
+12% in Colorado
Climate (median across tracked cities)
Avg Annual Temperature
50.2°F
52.7°F
+2.5°F in Illinois
Colorado vs Illinois — FAQ
- Is it cheaper to live in Colorado or Illinois?
- Illinois is cheaper on rent — its median one-bedroom of $1,258 runs about 4% below Colorado's $1,305, based on the cities we track in each state.
- How much more do you need to earn to live in Colorado than in Illinois?
- To keep rent near the recommended 30% of gross income, based on median rent across tracked cities, you'd want to earn roughly $52,000 a year in Colorado versus $50,000 in Illinois.
- Which has lower taxes, Colorado or Illinois?
- Colorado has a top state income tax rate of 4.40% and a 2.9% state sales tax. Illinois has a top state income tax rate of 4.95% and a 6.25% state sales tax.
Housing, income, and climate are medians across the 3/1 cities we track in Colorado/Illinois — not population-weighted statewide figures. Taxes are exact state-level rates. Sources: US Census Bureau, ACS 5-Year; NOAA Climate Normals 1981–2010; Tax Foundation 2026.