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Monday, December 6, 2021

Illinois River

Illinois tributary of the Mississippi River in the United States

Illinois River
Illinois River

The Illinois River is a principal tributary of the Mississippi River and is approximately 273 miles (439 km) long. Located in the U.S. state of Illinois, the river drains a large section of central Illinois, with a drainage basin of 28,756.6 square miles (74,479 km2). The drainage basin extends into Wisconsin, Indiana, and a very small area of southwestern Michigan.

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