City size comparison

compared to

Boulder is about 8 times smaller than Chicago.

Chicago is approximately 590 sq km, while Boulder is approximately 70 sq km, making Boulder 11.8% the size of Chicago.
Tip: This to-scale comparison of Chicago vs. Boulder uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Boulder vs. Chicago

Flip Comparison · See true size
See Boulder on top of Chicago
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Cost of Living Comparison · 7 categories - 2026 data
Chicago is 8.6% more expensive than Boulder
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