The Little Niangua River is a 64.4-mile-long (103.6 km)[3] tributary of the Niangua River in the Ozarks region of central Missouri in the United States.

[4] The Little Niangua rises in Dallas County and flows generally northeasterly through Hickory and Camden counties.

It joins the Niangua River in Camden County as an arm of the Lake of the Ozarks, which is formed by a dam on the Osage River.

[5] The upper reaches of the Little Niangua River, including the tributaries of Cahoochie Creek and Thomas Creek in Dallas County, are known habitats of the Niangua darter, a small fish that is on the U.S.

Fish and Wildlife Service's list of Endangered Species.