South Dakota is about 3.1 times bigger than West Virginia.

West Virginia is approximately 62,361 sq km, while South Dakota is approximately 196,540 sq km, making South Dakota 215% larger than West Virginia. Meanwhile, the population of West Virginia is ~1.9 million people (1.0 million fewer people live in South Dakota).
Tip: This to-scale comparison of West Virginia vs. South Dakota uses the Mercator projection, which distorts the size of regions near the poles.
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