Green River (Illinois)

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Green River
Basin features
Main source Reynolds Township, Lee County south of Rochelle, Illinois
775 ft (236 m)
41°51′26″N 89°05′30″W / 41.8572518°N 89.0917616°W / 41.8572518; -89.0917616 (Green River origin)
River mouth Confluence with Rock River near Quad Cities
558 ft (170 m)
41°28′09″N 90°23′43″W / 41.4692011°N 90.3954067°W / 41.4692011; -90.3954067 (Green River mouth)Coordinates: 41°28′09″N 90°23′43″W / 41.4692011°N 90.3954067°W / 41.4692011; -90.3954067 (Green River mouth)
Progression Green River → Rock → Mississippi → Gulf of Mexico
Physical characteristics
Length 89 mi (143 km)
GNIS ID 409398

The Green River is an 89-mile-long (143 km)[1] tributary of the Rock River in northwestern Illinois in the United States.[2] Via the Rock, it is part of the Mississippi River watershed. Much of the Green's course has been straightened and channelized.


The Green rises in northern Lee County and flows initially southwestward through Lee, Whiteside and Bureau Counties, passing the town of Amboy. It turns westward in Bureau County and flows into Henry County, where it roughly parallels the Hennepin Canal and passes the towns of Colona and Green Rock. It joins the Rock River just west of Green Rock, in the Quad Cities metropolitan area.

See also[edit]


  1. ^ U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. The National Map Archived 2012-04-05 at WebCite, accessed May 13, 2011
  2. ^ U.S. Geological Survey Geographic Names Information System: Green River