City size comparison

compared to

Rome is about 41 times bigger than San Mateo.

San Mateo is approximately 31 sq km, while Rome is approximately 1,287 sq km, making Rome 3,996% larger than San Mateo.
Tip: This to-scale comparison of San Mateo vs. Rome uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Rome vs. San Mateo

Flip Comparison · See true size
See Rome on top of San Mateo
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Cost of Living Comparison · 7 categories - 2026 data
San Mateo is 81.5% more expensive than Rome
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