City size comparison

compared to

San Diego is about 32 times bigger than Sydney.

Sydney is approximately 27 sq km, while San Diego is approximately 844 sq km, making San Diego 3,061% larger than Sydney.
Tip: This to-scale comparison of Sydney 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. Sydney
Flip Comparison · See true size
See San Diego on top of Sydney
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Cost of Living Comparison · 7 categories - 2026 data
Sydney is 3.9% cheaper than San Diego
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