City size comparison

compared to

San Mateo is about 50 times smaller than London.

London (including the 32 boroughs of greater London) is approximately 1,572 sq km, while San Mateo is approximately 31 sq km, making San Mateo 2.0% the size of London.
Tip: This to-scale comparison of London vs. San Mateo uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: San Mateo vs. London

Flip Comparison · See true size
See San Mateo on top of London
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Cost of Living Comparison · 7 categories - 2026 data
London is 25.2% more expensive than San Mateo
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