State size comparison

compared to

Indiana is about 1.6 times smaller than Illinois.

Illinois is approximately 143,961 sq km, while Indiana is approximately 92,895 sq km, making Indiana 64.53% the size of Illinois. Meanwhile, the population of Illinois is ~12.8 million people (6.3 million fewer people live in Indiana).
Tip: This to-scale comparison of Illinois vs. Indiana uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Indiana vs. Illinois
Flip Comparison · See true size
See Indiana on top of Illinois
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Cost of Living Comparison · 7 categories - 2026 data
Illinois is 15.7% more expensive than Indiana
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