Illinois is around the same size as Arkansas.

Arkansas is approximately 134,856 sq km, while Illinois is approximately 143,961 sq km, making Illinois 7% larger than Arkansas. Meanwhile, the population of Arkansas is ~2.9 million people (9.9 million more people live in Illinois).
This to-scale comparison of Arkansas vs. Illinois uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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