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Low riverside pastures of the Wümme near Bremen. During winter these are often flooded.
Origin Lüneburg Heath
Mouth Lesum
53°10′16″N 8°44′35″E / 53.17111°N 8.74306°E / 53.17111; 8.74306Coordinates: 53°10′16″N 8°44′35″E / 53.17111°N 8.74306°E / 53.17111; 8.74306
Basin countries Germany
Length 118 km (73 mi)

The Wümme is a river in northern Germany. It is the left tributary of the Lesum, which runs into the river Weser.

It runs 118 kilometres (73 mi) across northern Lower Saxony and the state Free Hanseatic City of Bremen, marking the border between the two states for part of its course.

The river's source is on the Wulfsberg in Lüneburg Heath. West of Rotenburg, it takes up the rivers Rodau and Wiedau. It merges with the Hamme by Wasserhorst (part of Blockland in Bremen), where the two rivers combine forming the Lesum.

Towns on the river Wümme are Lauenbrück, Scheeßel, Rotenburg, Ottersberg, Fischerhude, Lilienthal and Bremen.