City size comparison

compared to

Vienna is about 6 times bigger than Boulder.

Boulder is approximately 70 sq km, while Vienna is approximately 415 sq km, making Vienna 496% larger than Boulder.
Tip: This to-scale comparison of Boulder vs. Vienna uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Vienna vs. Boulder

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