Delmenhorst – Wesermarsch – Oldenburg-Land is an electoral constituency (German: Wahlkreis) represented in the Bundestag.

It is located in northwestern Lower Saxony, comprising the city of Delmenhorst and the districts of Wesermarsch and Landkreis Oldenburg.

As of the 2021 federal election, it comprises the independent city of Delmenhorst and the entirety of the districts of Wesermarsch and Landkreis Oldenburg.

The constituency was held by the Social Democratic Party (SPD) from its creation in 1949 until 1953, during which time it was represented by Fritz Ohlig.

Siemer won the constituency back for the CDU in the following election, but Müller returned again in 1969 and served three terms.

Yellow background denotes an electorate win by a list member, or other incumbent.

Yellow background denotes an electorate win by a list member, or other incumbent.

Yellow background denotes an electorate win by a list member, or other incumbent.