Name / Description

Illinois River

Type

Rivers

Discoverer

0

Length (miles)

273

Part of / Flows into

SW to Mississippi

Sovereignty

Illinois ; chief riverport is Peoria

Additional Notes

273 miles long, NE Ill.; formed by the confluence of the Des Plaines and Kankakee rivers; flows SW to the Mississippi R. at Grafton; 41�23'N 88�15'W. Important commercial and recreational waterway. Forms the greater part of the Illinois Waterway, which links the Great Lakes with the Mississippi. The chief city on the river is Peoria. Water quality has improved after decline in early 20th cent.