City size comparison

compared to

Boulder is about 1.3 times smaller than Zurich.

Zurich is approximately 88 sq km, while Boulder is approximately 70 sq km, making Boulder 79.21% the size of Zurich.
Tip: This to-scale comparison of Zurich vs. Boulder uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Boulder vs. Zurich

Flip Comparison · See true size
See Boulder on top of Zurich
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Cost of Living Comparison · 7 categories - 2026 data
Zurich is 39.4% more expensive than Boulder
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