State size comparison
compared to
Illinois is about 1.4 times smaller than South Dakota.
South Dakota is approximately 196,540 sq km, while Illinois is approximately 143,961 sq km, making Illinois 73.25% the size of South Dakota. Meanwhile, the population of South Dakota is ~814,180 people (12.0 million more people live in Illinois).
This to-scale comparison of
South Dakota
vs.
Illinois
uses the Mercator projection, which distorts the size of regions near the poles. Learn more.
Note: Try dragging the outline to reposition.
