State size comparison
Indiana is about 1.6 times smaller than Illinois.
Illinois is approximately 143,961 sq km, while Indiana is approximately 92,895 sq km, making Indiana 64.53% the size of Illinois. Meanwhile, the population of Illinois is ~12.8 million people (6.3 million fewer people live in Indiana).
This to-scale comparison of Illinois vs. Indiana uses the Mercator projection, which distorts the size of regions near the poles. Learn more. Note: Try dragging the outline to reposition.