Indiana is about 2.1 times smaller than South Dakota.

South Dakota is approximately 196,540 sq km, while Indiana is approximately 92,895 sq km, making Indiana 47.27% the size of South Dakota. Meanwhile, the population of South Dakota is ~814,180 people (5.7 million more people live in Indiana).
This to-scale comparison of South Dakota vs. Indiana uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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