Illinois is about 2.2 times smaller than New Mexico.

New Mexico is approximately 314,310 sq km, while Illinois is approximately 143,961 sq km, making Illinois 45.8% the size of New Mexico. Meanwhile, the population of New Mexico is ~2.1 million people (10.8 million more people live in Illinois).
This to-scale comparison of New Mexico vs. Illinois uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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