Iowa is about 1.2 times smaller than Oklahoma.

Oklahoma is approximately 177,847 sq km, while Iowa is approximately 144,701 sq km, making Iowa 81.36% the size of Oklahoma. Meanwhile, the population of Oklahoma is ~3.8 million people (704,996 fewer people live in Iowa).
This to-scale comparison of Oklahoma vs. Iowa uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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