City size comparison

compared to

Boston is about 7 times smaller than San Diego.

San Diego is approximately 844 sq km, while Boston is approximately 124 sq km, making Boston 14.69% the size of San Diego.
Tip: This to-scale comparison of San Diego vs. Boston uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Boston vs. San Diego
Flip Comparison · See true size
See Boston on top of San Diego
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Cost of Living Comparison · 7 categories - 2026 data
San Diego is 1.8% cheaper than Boston
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