Greenland is about 15 times bigger than Illinois.

Illinois is approximately 143,961 sq km, while Greenland is approximately 2,166,086 sq km, making Greenland 1,405% larger than Illinois. Meanwhile, the population of Illinois is ~12.8 million people (12.8 million fewer people live in Greenland).
Tip: This to-scale comparison of Illinois vs. Greenland uses the Mercator projection, which distorts the size of regions near the poles.
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