Söse

left|thumb|150px|The Söse in Osterode am Harz|Osterode Söse () is a river of Lower Saxony, Germany. It is a right tributary of the river Rhume and long.

== Geography == The Söse rises on the plateau of Auf dem Acker in the district of Göttingen in the southwestern part of the Harz Mountains in Germany. From there it flows initially westwards; and is then impounded at a pre-dam and then by the Söse Dam between the Osterode village of Riefensbeek and the town of Osterode itself. In Osterode the river bends northwest, only to swing westwards near Badenhausen and then southwards near Eisdorf just a few kilometres west of the Harz. It flows in that direction through Osterode-Dorste before entering the westward-flowing Rhume between the villages of and , both part of the borough of Katlenburg-Lindau in the district of Northeim.