State size comparison

compared to

Iowa is around the same size as Illinois.

Illinois is approximately 143,961 sq km, while Iowa is approximately 144,701 sq km, making Iowa 1% larger than Illinois. Meanwhile, the population of Illinois is ~12.8 million people (9.8 million fewer people live in Iowa).
Tip: This to-scale comparison of Illinois vs. Iowa uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Iowa vs. Illinois

Flip Comparison · See true size
See Iowa on top of Illinois
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Quality of Life Comparison · 16 statistics
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Cost of Living Comparison · 7 categories - 2026 data
Illinois is 14.8% more expensive than Iowa
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