The Nister, also called the Great Nister (German: Große Nister) to distinguish it from its tributary, the Black Nister, is a river in Rhineland-Palatinate, Germany.
The Nister is a right tributary of the Sieg. It is 64 km (40 mi) long.[1] Its source is in the Westerwald hills, near Willingen. It flows south of Bad Marienberg and north of Hachenburg. Near Wissen the Nister flows into the Sieg.