Illinois is about 1,846 times bigger than Guernsey.

Guernsey is approximately 78 sq km, while Illinois is approximately 143,961 sq km, making Illinois 184,465% larger than Guernsey. Meanwhile, the population of Guernsey is ~67,491 people (12.8 million more people live in Illinois).
This to-scale comparison of Guernsey vs. Illinois uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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