Missouri is about 1.2 times bigger than Iowa.

Iowa is approximately 144,701 sq km, while Missouri is approximately 178,414 sq km, making Missouri 23% larger than Iowa. Meanwhile, the population of Iowa is ~3.0 million people (2.9 million more people live in Missouri).
This to-scale comparison of Iowa vs. Missouri uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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