City size comparison

compared to

San Mateo is around the same size as Rockville.

Rockville (map shows its 87 named neighbourhoods; the area covers the whole city) is approximately 35 sq km, while San Mateo is approximately 31 sq km, making San Mateo 89.44% the size of Rockville.
Tip: This to-scale comparison of Rockville vs. San Mateo uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: San Mateo vs. Rockville

Flip Comparison · See true size
See San Mateo on top of Rockville
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Cost of Living Comparison · 7 categories - 2026 data
Rockville is 2.1% cheaper than San Mateo
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