City size comparison

compared to

Chicago is about 8 times bigger than Boulder.

Boulder is approximately 70 sq km, while Chicago is approximately 590 sq km, making Chicago 747% larger than Boulder.
Tip: This to-scale comparison of Boulder vs. Chicago uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Chicago vs. Boulder

Flip Comparison · See true size
See Chicago on top of Boulder
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Cost of Living Comparison · 7 categories - 2026 data
Boulder is 3.4% cheaper than Chicago
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