City size comparison

compared to

Boulder is about 3.1 times smaller than Seattle.

Seattle is approximately 217 sq km, while Boulder is approximately 70 sq km, making Boulder 32.04% the size of Seattle.
Tip: This to-scale comparison of Seattle vs. Boulder uses the Mercator projection, which distorts the size of regions near the poles.
Share

Compare further: Boulder vs. Seattle

Flip Comparison · See true size
See Boulder on top of Seattle
→
Cost of Living Comparison · 7 categories - 2026 data
Seattle is 19.6% more expensive than Boulder
→
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