State size comparison

compared to

Illinois is about 1.5 times smaller than Idaho.

Idaho is approximately 214,314 sq km, while Illinois is approximately 143,961 sq km, making Illinois 67.17% the size of Idaho. Meanwhile, the population of Idaho is ~1.6 million people (11.3 million more people live in Illinois).
Tip: This to-scale comparison of Idaho vs. Illinois uses the Mercator projection, which distorts the size of regions near the poles.
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