Country size comparison
Illinois is about 1.7 times smaller than United Kingdom.
United Kingdom is approximately 243,610 sq km, while Illinois is approximately 143,961 sq km, making Illinois 59.09% the size of United Kingdom. Meanwhile, the population of United Kingdom is ~67.8 million people (55.0 million fewer people live in Illinois).
This to-scale comparison of United Kingdom vs. Illinois uses the Mercator projection, which distorts the size of regions near the poles. Learn more. Note: Try dragging the outline to reposition.