Illinois is about 1.6 times bigger than Portugal.

Portugal is approximately 92,090 sq km, while Illinois is approximately 143,961 sq km, making Illinois 56% larger than Portugal. Meanwhile, the population of Portugal is ~10.2 million people (2.6 million more people live in Illinois).
This to-scale comparison of Portugal vs. Illinois uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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