The source is the confluence of the Kankakee and Des Plaines Rivers in Grundy County, Illinois.
The Illinois River is entirely contained within the State of Illinois.
· Illinois River (Illinois) · Indus River (Pakistan, China, India) · Irtysh River (China)
Cairo, Illinois at the confluence of the Ohio River
Illinois is bordered by the Mississippi River on the west.
Illinois
The river is the Mississippi river
Illinois is bordered by the Mississippi River on the west.
Illinois is bordered by the Ohio River to the south.
Illinois is bordered by the Mississippi River on the west
The Mississippi River forms the western border of Illinois.
Mississippi river
The Mississippi River