Iowa is about 1.4 times bigger than Kentucky.

Kentucky is approximately 102,896 sq km, while Iowa is approximately 144,701 sq km, making Iowa 41% larger than Kentucky. Meanwhile, the population of Kentucky is ~4.3 million people (1.3 million fewer people live in Iowa).
This to-scale comparison of Kentucky vs. Iowa uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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