Illinois is about 68 times smaller than United States.

United States is approximately 9,833,517 sq km, while Illinois is approximately 143,961 sq km, making Illinois 1.46% the size of United States. Meanwhile, the population of United States is ~337.3 million people (324.5 million fewer people live in Illinois).
This to-scale comparison of United States vs. Illinois uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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