Wesermarsch is a Kreis (district) in the northwestern part of Lower Saxony, Germany.

Several rivers cross the district from west to east, the largest being the Hunte, which runs through Oldenburg before entering Wesermarsch.

The district's largest town is located here: Nordenham, which lies opposite Bremerhaven at the Weser mouth.

The district was created in 1933 by merging the Ämter of Butjadingen, Brake and Elsfleth, and parts of the Ämter of Delmenhorst and Varel.

Media related to Landkreis Wesermarsch at Wikimedia Commons