City size comparison

compared to

San Diego is about 479 times smaller than California.

California is approximately 403,882 sq km, while San Diego is approximately 844 sq km, making San Diego 0.21% the size of California.
Tip: This to-scale comparison of California 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. California
Flip Comparison · See true size
See San Diego on top of California
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Cost of Living Comparison · 7 categories - 2026 data
California is 7.3% cheaper than San Diego
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