City size comparison

compared to

Sydney is about 38 times smaller than Illinois.

Illinois is approximately 143,961 sq km, while Sydney (the 30 councils of metropolitan Sydney, without the Blue Mountains, Hawkesbury, Wollondilly and the Central Coast) is approximately 3,810 sq km, making Sydney 2.65% 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 23.7% cheaper than Sydney
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