Delmenhorst is an urban district (Kreisfreie Stadt) in Lower Saxony, Germany. It has a population of 74,500 and is located 10 kilometres (6 miles) west of downtown Bremen with which it forms a contiguous urban area, whereas the city of Oldenburg is 25 kilometres (16 miles) to the northwest. The city has a total area of 62.36 square kilometres (24.08 square miles).

The landmark of the town is the water tower complex with the adjacent town hall, built from 1910 to 1914 by architect Heinz Stoffregen.

Another interesting place is the Burginsel (Castle Island), in which the old castle existed in medieval times. The construction was torn down during the 18th century. Today a park (called the Graft) occupies the grounds of the old castle.

The industrial history of the town is presented by the Nordwolle Museum, an Anchor Point of ERIH, The European Route of Industrial Heritage.