State size comparison
compared to
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).
Tip:
This to-scale comparison of
Illinois
vs.
Massachusetts
uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Massachusetts vs. Illinois
Flip Comparison · See true size
See Massachusetts on top of Illinois
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Quality of Life Comparison · 15 statistics
Be 20.0% more likely to live below the poverty line in Illinois
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Cost of Living Comparison · 7 categories - 2026 data
Illinois is 9.1% cheaper than Massachusetts
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Moving from Massachusetts to Illinois · Cost, visas & climate
Compare cost of living, salary and climate.
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City Size Comparison · See true size
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