City size comparison

compared to

Philadelphia is about 2.8 times bigger than Boston.

Boston is approximately 124 sq km, while Philadelphia is approximately 348 sq km, making Philadelphia 181% larger than Boston.
Tip: This to-scale comparison of Boston vs. Philadelphia uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Philadelphia vs. Boston

Flip Comparison · See true size
See Philadelphia on top of Boston
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Cost of Living Comparison · 7 categories - 2026 data
Boston is 16.0% more expensive than Philadelphia
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