The Salzwedel–Dannenberg railway was a branch line between Salzwedel in the north of Saxony-Anhalt and Dannenberg in eastern Lower Saxony in Germany.

It was built in 1891 by the Prussian state railways, initially as a stub line from Salzwedel to Lüchow and extended in 1911 to Dannenberg.

Passenger services ceased in 1975, goods trains continued tor run until the end of 1997.

The section still being worked between Lüchow and the station at Dannenberg Ost has been owned since 2001 by the Deutsche Regionaleisenbahn (DRE) and is called the Jeetzel Valley Railway (Jeetzeltalbahn).

After the opening of this route in April 1873 Lüchow therefore asked to build a branch line to Salzwedel.