The Ner is a river located in central Poland. It has a total length of approximately 134 kilometers (83 miles) and originates to the south-east of the city of Łódź.
The river flows through the Łódzkie and Wielkopolskie voivodeships, which are provinces in Poland. It serves as a right tributary of the Warta River and is recognized as the largest river in the Łódź region.