State size comparison
Illinois is about 4.7 times smaller than Texas.
Texas is approximately 678,052 sq km, while Illinois is approximately 143,961 sq km, making Illinois 21.23% the size of Texas. Meanwhile, the population of Texas is ~25.1 million people (12.3 million fewer people live in Illinois).
This to-scale comparison of Texas vs. Illinois uses the Mercator projection, which distorts the size of regions near the poles. Learn more. Note: Try dragging the outline to reposition.