City size comparison

compared to

San Mateo is about 19 times smaller than Chicago.

Chicago is approximately 590 sq km, while San Mateo is approximately 31 sq km, making San Mateo 5.33% the size of Chicago.
Tip: This to-scale comparison of Chicago vs. San Mateo uses the Mercator projection, which distorts the size of regions near the poles.
Share

Compare further: San Mateo vs. Chicago

Flip Comparison · See true size
See San Mateo on top of Chicago
→
Cost of Living Comparison · 7 categories - 2026 data
Chicago is 2.2% more expensive than San Mateo
→
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