State size comparison

compared to

Illinois is about 171 times bigger than San Diego.

San Diego is approximately 844 sq km, while Illinois is approximately 143,961 sq km, making Illinois 16,957% larger than San Diego.
Tip: This to-scale comparison of San Diego vs. Illinois uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Illinois vs. San Diego
Flip Comparison · See true size
See Illinois on top of San Diego
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Cost of Living Comparison · 7 categories - 2026 data
San Diego is 28.9% more expensive than Illinois
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