Eller is a river of

Lower Saxony Lower Saxony (german: Niedersachsen ; nds, Neddersassen; stq, Läichsaksen) is a German state (') in northwestern Germany. It is the second-largest state by land area, with , and fourth-largest in population (8 million in 2021) among the 16 ...

and

Thuringia Thuringia (; german: Thüringen ), officially the Free State of Thuringia ( ), is a state of central Germany, covering , the sixth smallest of the sixteen German states. It has a population of about 2.1 million. Erfurt is the capital and lar ...

Germany Germany, officially the Federal Republic of Germany (FRG),, is a country in Central Europe. It is the most populous member state of the European Union. Germany lies between the Baltic and North Sea to the north and the Alps to the sou ...

. Its source is the confluence of the

Weilroder Eller Weilroder Eller is a river of Thuringia, Germany. At its confluence with the Geroder Eller near Zwinge, the Eller is formed. See also *List of rivers of Thuringia A list of rivers of Thuringia, Germany: A * Alster * Apfelstädt * Asche ...

and the

Geroder Eller Geroder Eller is a river of Thuringia, Germany. At its confluence with the Weilroder Eller near Zwinge, the Eller is formed. See also *List of rivers of Thuringia A list of rivers of Thuringia, Germany: A * Alster * Apfelstädt * Asc ...

. It flows into the

Rhume The Rhume is a long river in Lower Saxony, Germany. It is a right tributary of the Leine. Its source is the karstic spring of Rhume Spring in Rhumspringe, south of the Harz mountain range. The water drains with high pressure from the ground of ...

in Rüdershausen.