South Dakota is about 14 times smaller than Argentina.

Argentina is approximately 2,780,400 sq km, while South Dakota is approximately 196,540 sq km, making South Dakota 7.07% the size of Argentina. Meanwhile, the population of Argentina is ~46.2 million people (45.4 million fewer people live in South Dakota).
Tip: This to-scale comparison of Argentina vs. South Dakota uses the Mercator projection, which distorts the size of regions near the poles.
Our free app, MapSize by MyLifeElsewhere — compare any two places, to scale on your mobile device.