City size comparison

compared to

San Diego is about 171 times smaller than Illinois.

Illinois is approximately 143,961 sq km, while San Diego is approximately 844 sq km, making San Diego 0.59% the size of Illinois.
Tip: This to-scale comparison of Illinois 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. Illinois
Flip Comparison · See true size
See San Diego on top of Illinois
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Cost of Living Comparison · 7 categories - 2026 data
Illinois is 19.0% cheaper than San Diego
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