The Fishing River is a 39.0-mile-long (62.8 km) tributary of the Missouri River in western Missouri in the United States. It rises in the northeastern extremity of Kansas City in Clay County and flows generally eastward and southeastward through Clay and southeastern Ray counties, past the town of Mosby. It joins the Missouri River about 3 miles (5 km) south of the town of Orrick.
Downstream of Mosby, it collects the East Fork Fishing River, which rises at the town of Lawson and flows 20.6 miles (33.2 km) generally southward through Ray and Clay counties, past the town of Excelsior Springs.
Fishing River was named for the fact it is full of fish.
In 1808, William Clark of the Lewis and Clark Expedition established Fort Osage along the Missouri near the mouth of the Fishing River. The fort became a center of trade among European settlers and Native Americans in the region.
- Confluence with the Missouri River in Ray County, Missouri: 
- Clay County, Missouri: 
- U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. The National Map Archived 2012-04-05 at WebCite, accessed May 31, 2011
- "Clay County Place Names, 1928–1945 (archived)". The State Historical Society of Missouri. Archived from the original on 24 June 2016. Retrieved 19 September 2016.
- "Fishing River". Geographic Names Information System. United States Geological Survey. Retrieved 2014-01-19.
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