City size comparison

compared to

San Jose is about 4.7 times smaller than San Diego.

San Diego is approximately 844 sq km, while San Jose is approximately 180 sq km, making San Jose 21.32% the size of San Diego.
Tip: This to-scale comparison of San Diego vs. San Jose uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: San Jose vs. San Diego
Flip Comparison · See true size
See San Jose on top of San Diego
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Cost of Living Comparison · 7 categories - 2026 data
San Diego is 4.8% cheaper than San Jose
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