City size comparison

compared to

Boulder is about 1.8 times smaller than Boston.

Boston is approximately 124 sq km, while Boulder is approximately 70 sq km, making Boulder 56.14% the size of Boston.
Tip: This to-scale comparison of Boston vs. Boulder uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Boulder vs. Boston

Flip Comparison · See true size
See Boulder on top of Boston
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Cost of Living Comparison · 7 categories - 2026 data
Boston is 18.6% more expensive than Boulder
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