Kenya is about 3 times bigger than South Dakota.

South Dakota is approximately 196,540 sq km, while Kenya is approximately 580,367 sq km, making Kenya 195% larger than South Dakota. Meanwhile, the population of South Dakota is ~814,180 people (55.1 million more people live in Kenya).
Tip: This to-scale comparison of South Dakota vs. Kenya uses the Mercator projection, which distorts the size of regions near the poles.