State size comparison
Illinois, USA
compared to
Oklahoma, USA
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).
We have positioned the outline of Oklahoma near the middle of Illinois.
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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.
