Spain is about 3.5 times bigger than Illinois.

Illinois is approximately 143,961 sq km, while Spain is approximately 505,370 sq km, making Spain 251% larger than Illinois. Meanwhile, the population of Illinois is ~12.8 million people (34.3 million more people live in Spain).
This to-scale comparison of Illinois vs. Spain uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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