Texas is about 4.7 times bigger than Illinois.

Illinois is approximately 143,961 sq km, while Texas is approximately 678,052 sq km, making Texas 371% larger than Illinois. Meanwhile, the population of Illinois is ~12.8 million people (12.3 million more people live in Texas).
This to-scale comparison of Illinois vs. Texas uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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