City size comparison

compared to

Vienna is about 13 times bigger than San Mateo.

San Mateo is approximately 31 sq km, while Vienna is approximately 415 sq km, making Vienna 1,220% larger than San Mateo.
Tip: This to-scale comparison of San Mateo vs. Vienna uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Vienna vs. San Mateo

Flip Comparison · See true size
See Vienna on top of San Mateo
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Cost of Living Comparison · 6 categories - 2026 data
San Mateo is 64.0% more expensive than Vienna
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