City size comparison

compared to

San Mateo is about 16 times smaller than Warsaw.

Warsaw is approximately 517 sq km, while San Mateo is approximately 31 sq km, making San Mateo 6.08% the size of Warsaw.
Tip: This to-scale comparison of Warsaw 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. Warsaw

Flip Comparison · See true size
See San Mateo on top of Warsaw
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Cost of Living Comparison · 7 categories - 2026 data
Warsaw is 50.1% cheaper than San Mateo
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