State size comparison

compared to

Arizona is about 2 times bigger than Illinois.

Illinois is approximately 143,961 sq km, while Arizona is approximately 294,312 sq km, making Arizona 104% larger than Illinois. Meanwhile, the population of Illinois is ~12.8 million people (6.4 million fewer people live in Arizona).
Tip: This to-scale comparison of Illinois vs. Arizona uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Arizona vs. Illinois
Flip Comparison · See true size
See Arizona on top of Illinois
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Cost of Living Comparison · 7 categories - 2026 data
Illinois is 7.9% more expensive than Arizona
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