Australia is about 54 times bigger than Illinois.

Illinois is approximately 143,961 sq km, while Australia is approximately 7,741,220 sq km, making Australia 5,277% larger than Illinois. Meanwhile, the population of Illinois is ~12.8 million people (13.3 million more people live in Australia).
This to-scale comparison of Illinois vs. Australia uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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