City size comparison

compared to

Vienna is about 2 times smaller than San Diego.

San Diego is approximately 844 sq km, while Vienna is approximately 415 sq km, making Vienna 49.14% the size of San Diego.
Tip: This to-scale comparison of San Diego vs. Vienna uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Vienna vs. San Diego
Flip Comparison · See true size
See Vienna on top of San Diego
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Cost of Living Comparison · 7 categories - 2026 data
San Diego is 46.5% more expensive than Vienna
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