Marmaton River
The Marmaton River near Nevada, Missouri
Map of the Osage River watershed including the Marmaton River
Location
Country	United States
State	Kansas, Missouri
Physical characteristics
Source
• location	Allen County, Kansas
• coordinates	37°56′45″N 95°07′51″W / 37.94583°N 95.13083°W / 37.94583; -95.13083
• elevation	1,105 ft (337 m)
Mouth	Little Osage River
• location	Vernon County, Missouri
• coordinates	37°59′57″N 94°19′08″W / 37.99917°N 94.31889°W / 37.99917; -94.31889[1]
• elevation	732 ft (223 m)
Length	102 mi (164 km)
Discharge
• location	USGS 06918060 near Nevada, MO[2]
• average	1,051 cu ft/s (29.8 m3/s)
• minimum	0.03 cu ft/s (0.00085 m3/s)
• maximum	33,800 cu ft/s (960 m3/s)
Basin features
Watersheds	Marmaton-Little Osage-Osage-Missouri-Mississippi

The Marmaton River (MAR-muh-tuhn) is a 102-mile-long (164 km)^[3] tributary of the Little Osage River in southeastern Kansas and western Missouri in the United States. Via the Little Osage, Osage and Missouri rivers, it is part of the watershed of the Mississippi River.

Course

The Marmaton River rises in Kansas northeast of Moran in eastern Allen County and flows generally eastward through Bourbon County in Kansas and Vernon County in Missouri, past the towns of Uniontown, Redfield and Fort Scott in Kansas and Deerfield in Missouri. It joins the Little Osage River from the south, 7 miles (11 km) south-southeast of Rich Hill, Missouri.

Name

Marmaton is a corruption of Marmiton, a French name given by fur traders meaning "scullion".^[4]