Ireland is about 2.8 times smaller than South Dakota.

South Dakota is approximately 196,540 sq km, while Ireland is approximately 70,273 sq km, making Ireland 35.76% the size of South Dakota. Meanwhile, the population of South Dakota is ~814,180 people (4.5 million more people live in Ireland).
This to-scale comparison of South Dakota vs. Ireland uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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