The Dampfschiffahrts-Gesellschaft für den Nieder- und Mittelrhein (DGNM) was a shipping line and joint-stock company with headquarters in Düsseldorf.

In 1967 both companies merged into the Köln-Düsseldorfer Deutsche Rheinschiffahrt A.G. On 3 October 1825 the Preußisch-Rheinische Dampfschiffahrt-Gesellschaft (PRDG) was founded by merchants from Cologne.

At about the same time, the Dampfschiffahrtsgesellschaft von Rhein und Main (DGRM) was founded in Mainz.

The joint-stock company Dampfschiffahrts-Gesellschaft für den Nieder- und Mittelrhein zu Düsseldorf was approved for an unlimited duration on 22 September 1836.

The trick of the partnership was that it made a single offer to the public, and so eliminated the internal competition between the partners.