State size comparison

compared to

Illinois is about 28 times bigger than Delaware.

Delaware is approximately 5,060 sq km, while Illinois is approximately 143,961 sq km, making Illinois 2,745% larger than Delaware. Meanwhile, the population of Delaware is ~897,934 people (11.9 million more people live in Illinois).
Tip: This to-scale comparison of Delaware vs. Illinois uses the Mercator projection, which distorts the size of regions near the poles.
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