Massachusetts is about 7 times smaller than Illinois.

Illinois is approximately 143,961 sq km, while Massachusetts is approximately 20,306 sq km, making Massachusetts 14.11% the size of Illinois. Meanwhile, the population of Illinois is ~12.8 million people (6.3 million fewer people live in Massachusetts).
This to-scale comparison of Illinois vs. Massachusetts uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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