City size comparison

compared to

Boulder is about 6 times smaller than Vienna.

Vienna is approximately 415 sq km, while Boulder is approximately 70 sq km, making Boulder 16.78% the size of Vienna.
Tip: This to-scale comparison of Vienna vs. Boulder uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Boulder vs. Vienna

Flip Comparison · See true size
See Boulder on top of Vienna
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Cost of Living Comparison · 7 categories - 2026 data
Vienna is 22.1% cheaper than Boulder
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