Illinois is about 2.8 times bigger than Costa Rica.

Costa Rica is approximately 51,100 sq km, while Illinois is approximately 143,961 sq km, making Illinois 182% larger than Costa Rica. Meanwhile, the population of Costa Rica is ~5.2 million people (7.6 million more people live in Illinois).
This to-scale comparison of Costa Rica vs. Illinois uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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