Country size comparison

compared to

Tonga is about 193 times smaller than Illinois.

Illinois is approximately 143,961 sq km, while Tonga is approximately 747 sq km, making Tonga 0.52% the size of Illinois. Meanwhile, the population of Illinois is ~12.8 million people (12.7 million fewer people live in Tonga).
Tip: This to-scale comparison of Illinois vs. Tonga uses the Mercator projection, which distorts the size of regions near the poles.
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