Iowa River

The Iowa River is a tributary of the Mississippi River in the state of Iowa in the United States. It is about 323 miles (520 km) long and is open to small river craft to Iowa City, about 65 miles (105 km) from its mouth. Its major tributary is the Cedar River.

Iowa River
The Iowa River upstream of Marshalltown, Iowa
Map showing the Iowa River (to the left) and its tributary the Cedar River
Location
StateIowa
Physical characteristics
Sourceconfluence of East Branch Iowa River and West Branch Iowa River
  locationBelmond
  coordinates42.860524°N 93.6138214°W / 42.860524; -93.6138214
MouthMississippi River
  location
near Toolesboro
  coordinates
41°9′38″N 91°1′26″W
Length323 mi (520 km)
Discharge 
  locationOakville, Iowa
  average14,109 cu/ft. per sec.
Basin features
River systemMississippi River
Tributaries 
  leftSwisher Creek, Cedar River
  rightEnglish River
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