City size comparison

compared to

Istanbul is about 170 times bigger than San Mateo.

San Mateo is approximately 31 sq km, while Istanbul is approximately 5,343 sq km, making Istanbul 16,901% larger than San Mateo.
Tip: This to-scale comparison of San Mateo vs. Istanbul uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Istanbul vs. San Mateo

Flip Comparison · See true size
See Istanbul on top of San Mateo
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Cost of Living Comparison · 7 categories - 2026 data
San Mateo is 2.3 times more expensive than Istanbul
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