The Iroquois River in Newton County, Indiana.
|- location||NW of Rensselaer, Newton Township, Jasper County, Indiana|
|- elevation||705 feet (215 m)|
IROQUOIS RIVER Latitude and Longitude:
|599 feet (183 m)|
|Length||103 miles (166 km)|
|Basin size||2,091 sq mi (5,420 km2)|
|- average||1,741 cubic feet per second (49.3 m3/s)|
The Iroquois River is a 103-mile-long (166 km)  tributary of the Kankakee River in northwestern Indiana and northeastern Illinois in the United States.  It was named for the Iroquois people.  Via the Kankakee and Illinois rivers, it is part of the watershed of the Mississippi River.
The Iroquois River rises in Jasper County, Indiana, and flows generally west-southwestwardly through Newton County, Indiana, and Iroquois County, Illinois, where it turns northward and flows into Kankakee County, Illinois. It enters the Kankakee River from the south in Kankakee County, opposite the village of Aroma Park, about 4 miles (6 km) southwest of the city of Kankakee.
- Borntrager Ditch
- Burns Ditch
- Irokois River
- Iroquois Ditch
- Pickamick River
- Pickamink Lateral
- Pickamink River
- Pinkamink River
- Swain Ditch
- Thompson Ditch
- Rensselaer, Indiana
- Brook, Indiana
- Kentland, Indiana
- Iroquois, Illinois
- Watseka, Illinois
- Sugar Island, Illinois
- U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. The National Map Archived 2012-04-05 at WebCite, accessed May 13, 2011
- U.S. Geological Survey Geographic Names Information System: Iroquois River
- Gannett, Henry (1905). The Origin of Certain Place Names in the United States. Govt. Print. Off. p. 166.
- Columbia Gazetteer of North America entry
- DeLorme (2003). Illinois Atlas & Gazetteer. Yarmouth, Maine: DeLorme. ISBN 0-89933-321-4.
- DeLorme (1998). Indiana Atlas & Gazetteer. Yarmouth, Maine: DeLorme. ISBN 0-89933-211-0.
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