City size comparison

compared to

Sydney is about 5,392 times smaller than Illinois.

Illinois is approximately 143,961 sq km, while Sydney is approximately 27 sq km, making Sydney 0.02% the size of Illinois.
Tip: This to-scale comparison of Illinois vs. Sydney uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Sydney vs. Illinois
Flip Comparison · See true size
See Sydney on top of Illinois
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Cost of Living Comparison · 7 categories - 2026 data
Illinois is 6.5% cheaper than Sydney
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