City size comparison

compared to

Phoenix is about 1.6 times bigger than San Diego.

San Diego is approximately 844 sq km, while Phoenix is approximately 1,342 sq km, making Phoenix 59% larger than San Diego.
Tip: This to-scale comparison of San Diego vs. Phoenix uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Phoenix vs. San Diego
Flip Comparison · See true size
See Phoenix on top of San Diego
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Cost of Living Comparison · 7 categories - 2026 data
San Diego is 26.0% more expensive than Phoenix
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