Pennsylvania is about 1.5 times smaller than Missouri.

Missouri is approximately 178,414 sq km, while Pennsylvania is approximately 116,075 sq km, making Pennsylvania 65.06% the size of Missouri. Meanwhile, the population of Missouri is ~6.0 million people (6.7 million more people live in Pennsylvania).
This to-scale comparison of Missouri vs. Pennsylvania uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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