City size comparison

compared to

London is about 4.5 times bigger than Philadelphia.

Philadelphia is approximately 348 sq km, while London (including the 32 boroughs of greater London) is approximately 1,572 sq km, making London 352% larger than Philadelphia.
Tip: This to-scale comparison of Philadelphia vs. London uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: London vs. Philadelphia

Flip Comparison · See true size
See London on top of Philadelphia
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Cost of Living Comparison · 7 categories - 2026 data
Philadelphia is 5.7% cheaper than London
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