State size comparison
compared to
Illinois is about 1.2 times smaller than Oklahoma.
Oklahoma is approximately 177,847 sq km, while Illinois is approximately 143,961 sq km, making Illinois 80.95% the size of Oklahoma. Meanwhile, the population of Oklahoma is ~3.8 million people (9.1 million more people live in Illinois).
This to-scale comparison of
Oklahoma
vs.
Illinois
uses the Mercator projection, which distorts the size of regions near the poles. Learn more.
Note: Try dragging the outline to reposition.
