State size comparison

compared to

Illinois is about 5,392 times bigger than Sydney.

Sydney is approximately 27 sq km, while Illinois is approximately 143,961 sq km, making Illinois 539,080% larger than Sydney.
Tip: This to-scale comparison of Sydney vs. Illinois uses the Mercator projection, which distorts the size of regions near the poles.
Share
Compare further: Illinois vs. Sydney
Flip Comparison · See true size
See Illinois on top of Sydney
→
Cost of Living Comparison · 7 categories - 2026 data
Sydney is 20.1% more expensive than Illinois
→