State size comparison
compared to
New Jersey is about 7 times smaller than Illinois.
Illinois is approximately 143,961 sq km, while New Jersey is approximately 19,211 sq km, making New Jersey 13.34% the size of Illinois. Meanwhile, the population of Illinois is ~12.8 million people (4.0 million fewer people live in New Jersey).
Tip:
This to-scale comparison of
Illinois
vs.
New Jersey
uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: New Jersey vs. Illinois
Flip Comparison · See true size
See New Jersey on top of Illinois
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Quality of Life Comparison · 14 statistics
Be 22.6% more likely to live below the poverty line in Illinois
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Cost of Living Comparison · 7 categories - 2026 data
Illinois is 13.5% cheaper than New Jersey
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City Size Comparison · See true size
Compare the size of New York City vs Chicago
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