City size comparison

compared to

Boston is about 1.8 times bigger than Boulder.

Boulder is approximately 70 sq km, while Boston is approximately 124 sq km, making Boston 78% larger than Boulder.
Tip: This to-scale comparison of Boulder vs. Boston uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Boston vs. Boulder

Flip Comparison · See true size
See Boston on top of Boulder
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Cost of Living Comparison · 7 categories - 2026 data
Boulder is 9.9% cheaper than Boston
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