Puerto Rico is about 16 times smaller than Illinois.

Illinois is approximately 143,961 sq km, while Puerto Rico is approximately 9,104 sq km, making Puerto Rico 6.32% the size of Illinois. Meanwhile, the population of Illinois is ~12.8 million people (9.7 million fewer people live in Puerto Rico).
This to-scale comparison of Illinois vs. Puerto Rico uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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