Pennsylvania is about 1.7 times smaller than South Dakota.

South Dakota is approximately 196,540 sq km, while Pennsylvania is approximately 116,075 sq km, making Pennsylvania 59.06% the size of South Dakota. Meanwhile, the population of South Dakota is ~814,180 people (11.9 million more people live in Pennsylvania).
This to-scale comparison of South Dakota vs. Pennsylvania uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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