City size comparison

compared to

Madrid is about 19 times bigger than San Mateo.

San Mateo is approximately 31 sq km, while Madrid is approximately 604 sq km, making Madrid 1,823% larger than San Mateo.
Tip: This to-scale comparison of San Mateo vs. Madrid uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Madrid vs. San Mateo

Flip Comparison · See true size
See Madrid on top of San Mateo
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Cost of Living Comparison · 7 categories - 2026 data
San Mateo is 70.3% more expensive than Madrid
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