Illinois is about 7 times bigger than New Jersey.

New Jersey is approximately 19,211 sq km, while Illinois is approximately 143,961 sq km, making Illinois 649% larger than New Jersey. Meanwhile, the population of New Jersey is ~8.8 million people (4.0 million more people live in Illinois).
This to-scale comparison of New Jersey vs. Illinois uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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