The Dosse is a river in the district of Ostprignitz-Ruppin in the northwestern part of Brandenburg, Germany.

It flows generally south, through Wittstock, Wusterhausen, and Neustadt an der Dosse, before joining the Havel near Havelberg in Saxony-Anhalt.

The total catchment area is 1,268 square kilometres (490 sq mi).

With the town of Wittstock on its banks, the Dosse was the site of the 1636 Battle of Wittstock between Sweden and an alliance between Imperial and Saxon troops during the Thirty Years' War.

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