City size comparison

compared to

Sydney is about 4.5 times bigger than San Diego.

San Diego is approximately 844 sq km, while Sydney (the 30 councils of metropolitan Sydney, without the Blue Mountains, Hawkesbury, Wollondilly and the Central Coast) is approximately 3,810 sq km, making Sydney 351% larger than San Diego.
Tip: This to-scale comparison of San Diego vs. Sydney uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Sydney vs. San Diego

Flip Comparison · See true size
See Sydney on top of San Diego
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Cost of Living Comparison · 7 categories - 2026 data
San Diego is 14.4% more expensive than Sydney
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