South Dakota is about 2.8 times smaller than France.

France is approximately 551,500 sq km, while South Dakota is approximately 196,540 sq km, making South Dakota 35.64% the size of France. Meanwhile, the population of France is ~68.3 million people (67.5 million fewer people live in South Dakota).
Tip: This to-scale comparison of France vs. South Dakota uses the Mercator projection, which distorts the size of regions near the poles.
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