Werder, also called Werder (Havel) or Werder upon Havel, is a city in Germany, located in the Potsdam-Mittelmark Kreis (district) of Brandenburg, one of Germany's sixteen Bundesländer (federal states), just west of the region's capital city of Potsdam.

Werder is one of the 47 woredas in the Somali Region of Ethiopia, named after its major town, Werder.