City size comparison

compared to

Boston is about 4.9 times smaller than Madrid.

Madrid is approximately 604 sq km, while Boston is approximately 124 sq km, making Boston 20.52% the size of Madrid.
Tip: This to-scale comparison of Madrid vs. Boston uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Boston vs. Madrid
Flip Comparison · See true size
See Boston on top of Madrid
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Cost of Living Comparison · 7 categories - 2026 data
Madrid is 24.2% cheaper than Boston
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