City size comparison

compared to

Shanghai is about 202 times bigger than San Mateo.

San Mateo is approximately 31 sq km, while Shanghai is approximately 6,341 sq km, making Shanghai 20,077% larger than San Mateo.
Tip: This to-scale comparison of San Mateo vs. Shanghai uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Shanghai vs. San Mateo

Flip Comparison · See true size
See Shanghai on top of San Mateo
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Cost of Living Comparison · 7 categories - 2026 data
San Mateo is 2.8 times more expensive than Shanghai
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