SS Oldenburg was a German cargo steamship that was built for the Oldenburg-Portugiesische Dampfschiffs-Rhederei (OPDR) in 1936.

Oldenburg had a single screw propeller, and a four-cylinder compound steam engine, with two high-pressure and two low-pressure cylinders.

She also had a Bauer-Wach exhaust steam turbine, which was connected to her propeller shaft via a Föttinger fluid coupling and double reduction gearing.

The combined power of her piston engine and turbine was rated at 404 NHP,[8] and gave her a speed of 12.5 knots (23 km/h).

On 23 December she was assigned to 6 Vorpostengrüppe, and on 22 January 1940 she was placed under the control of the Führer der Sonderverband West.