State size comparison

compared to

Michigan is about 1.3 times bigger than South Dakota.

South Dakota is approximately 196,540 sq km, while Michigan is approximately 250,493 sq km, making Michigan 27% larger than South Dakota. Meanwhile, the population of South Dakota is ~814,180 people (9.1 million more people live in Michigan).
Tip: This to-scale comparison of South Dakota vs. Michigan uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Michigan vs. South Dakota

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