City size comparison

compared to

San Diego is about 2 times bigger than Vienna.

Vienna is approximately 415 sq km, while San Diego is approximately 844 sq km, making San Diego 103% larger than Vienna.
Tip: This to-scale comparison of Vienna vs. San Diego uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: San Diego vs. Vienna

Flip Comparison · See true size
See San Diego on top of Vienna
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Cost of Living Comparison · 7 categories - 2026 data
Vienna is 10.5% cheaper than San Diego
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