State size comparison

compared to

Illinois is about 713 times bigger than Oakland.

Oakland is approximately 202 sq km, while Illinois is approximately 143,961 sq km, making Illinois 71,168% larger than Oakland.
Tip: This to-scale comparison of Oakland vs. Illinois uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Illinois vs. Oakland

Flip Comparison · See true size
See Illinois on top of Oakland
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Cost of Living Comparison · 7 categories - 2026 data
Oakland is 35.3% more expensive than Illinois
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