The NS 7100 was a series of tank engines of the Dutch Railways (NS) and its predecessors Maatschappij tot Exploitatie van Staatsspoorwegen (SS), Hollandsche IJzeren Spoorweg-Maatschappij (HSM) and Noord-Friesche Locaalspoorweg-Maatschappij (NFLS).

At the beginning of the twentieth century, the NFLS ordered ten locomotives for local trains on the Leeuwarden - Stiens - Metslawier, Stiens - Harlingen, and Tzummarum - Franeker Halte lines from the Hohenzollern factory in Düsseldorf-Grafenberg.

As of December 1, 1905, the operation of these lines was taken over by the HSM, whereby the locomotives and rolling stock was also taken over.

The HSM renumbered the ten locomotives in the series 1051–1060.

At the end of World War II, Nos.

The SS used these locomotives on light passenger trains on local railway lines.

7124 was run into the Potmarge near Leeuwarden to stop the advance of the enemy troops.