Its entire length lies within the U.S. state of Kansas.

[2] The South Fork Ninnescah River originates in south-central Kansas in the High Plains.

Its source lies in west-central Pratt County approximately 2 miles (3.2 km) southwest of Cullison, Kansas.

From there, it flows generally east into the Wellington Lowlands.

This article related to a river in Kansas is a stub.