State size comparison

compared to

Montana is about 2.6 times bigger than Illinois.

Illinois is approximately 143,961 sq km, while Montana is approximately 376,979 sq km, making Montana 162% larger than Illinois. Meanwhile, the population of Illinois is ~12.7 million people (11.6 million fewer people live in Montana).
Tip: This to-scale comparison of Illinois vs. Montana uses the Mercator projection, which distorts the size of regions near the poles.
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