Nordenham is a town in the Wesermarsch district, in Lower Saxony, Germany. It is located at the mouth (on the west bank) of the Weser river on the Butjadingen peninsula on the coast of the North Sea. The seaport city of Bremerhaven is located on the other side (east bank) of the river. The Midgard-seaport in Nordenham is the largest private-owned harbor in Germany.