Iowa is about 1.2 times smaller than Missouri.

Missouri is approximately 178,414 sq km, while Iowa is approximately 144,701 sq km, making Iowa 81.1% the size of Missouri. Meanwhile, the population of Missouri is ~6.0 million people (2.9 million fewer people live in Iowa).
This to-scale comparison of Missouri vs. Iowa uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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