State size comparison

 Missouri, USA
compared to
 Illinois, USA

Missouri is about 1.2 times bigger than Illinois.

Illinois is approximately 143,961 sq km, while Missouri is approximately 178,414 sq km, making Missouri 24% larger than Illinois. Meanwhile, the population of Illinois is ~12.8 million people (6.8 million fewer people live in Missouri). We have positioned the outline of Illinois near the middle of Missouri.
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This to-scale comparison of Illinois vs. Missouri uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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