City size comparison

compared to

Zurich is about 1.3 times bigger than Boulder.

Boulder is approximately 70 sq km, while Zurich is approximately 88 sq km, making Zurich 26% larger than Boulder.
Tip: This to-scale comparison of Boulder vs. Zurich uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Zurich vs. Boulder

Flip Comparison · See true size
See Zurich on top of Boulder
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Cost of Living Comparison · 7 categories - 2026 data
Boulder is 28.3% cheaper than Zurich
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