City size comparison

compared to

Rockville is around the same size as San Mateo.

San Mateo is approximately 31 sq km, while Rockville (map shows its 87 named neighbourhoods; the area covers the whole city) is approximately 35 sq km, making Rockville 12% larger than San Mateo.
Tip: This to-scale comparison of San Mateo vs. Rockville uses the Mercator projection, which distorts the size of regions near the poles.
Share

Compare further: Rockville vs. San Mateo

Flip Comparison · See true size
See Rockville on top of San Mateo
→
Cost of Living Comparison · 7 categories - 2026 data
San Mateo is 17.6% more expensive than Rockville
→
Our free app, MapSize by MyLifeElsewhere — compare any two places, to scale on your mobile device.
Download on the App Store GET IT ON Google Play