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The source is the confluence of the Kankakee and Des Plaines Rivers in Grundy County, Illinois.

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Q: What state does the Illinois River begin in?
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What are the states that border the Illinois river?

The Illinois River is entirely contained within the State of Illinois.


What are some bodies of water that begin with the letter I?

· Illinois River (Illinois) · Indus River (Pakistan, China, India) · Irtysh River (China)


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Cairo, Illinois at the confluence of the Ohio River


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Illinois is bordered by the Mississippi River on the west.


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Illinois is bordered by the Mississippi River on the west.


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Illinois is bordered by the Ohio River to the south.


The River forms the Western border of the state of Illinois?

Illinois is bordered by the Mississippi River on the west


What river is the western border for the state of Illinois?

The Mississippi River forms the western border of Illinois.


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Mississippi river


What river is the west border of the state of Illinois?

The Mississippi River