The Illinois River in Arkansas and Oklahoma in the United States.
The Illinois River in Oregon in the United States.
The Illinois River in Jackson County, Colorado United States.
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The IllinoisRiver is a principal tributary of the Mississippi River, approximately 273 miles (439 km) long, in the state of Illinois in the United States.
After the construction of the Illinois and Michigan Canal and the Hennepin Canal in the 19th century, the river's role as link between Lake Michigan and the Mississippi was extended into the era of modern industrial shipping.
The IllinoisRiver valley was one of the strongholds of the Illiniwek confederation of Native Americans.
The state is named for the IllinoisRiver which was named by French explorers after the indigenous Illiniwek people, a consortium of Algonquian tribes that thrived in the area.
The highest true elevation in Illinois is the Sears Tower with an elevation at the top of its roof of approximately 2,030 feet (the elevation of Chicago is approximately 580 feet and the height of the roof is approximately 1450 feet).
Illinois is known as the "Land of Lincoln" because it is here that the 16th President spent most of his life, practicing law and living in Springfield.