The Prims Valley Railway (German: Primstalbahn) is a partly closed railway line that ran south from Nonnweiler to Primsweiler along the upper reaches of the Prims and then turned to the east and ran via Lebach to Neunkirchen in the German state of the Saarland.

The first section, which was about eight kilometres long, ran from Neunkirchen to Wemmetsweiler (and from there continued south towards Saarbrücken).

Because the whole line was being constructed simultaneously, the domestic labour market was soon exhausted and foreign workers from Italy and the Balkans had to be used.

The line from the beginning served workers from the thinly populated northern areas of the Saarland.

Lines branched In Primsweiler to Dillingen (Saar) in the west, in Lebach to Völklingen over the Lebach–Völklingen railway and in Wemmetsweiler south towards Saarbrücken.

Trains from Lebach-Jabach now run over the Wemmetsweiler curve, which was opened in 2006, and over the Fischbach Valley Railway to Saarbrücken.

After this time, the basalt works in Michelbach and the Meiser company in Limbach were served over the Dillingen branch.

[3] After the construction of the Wemmetsweiler curve in 2004, passenger services between Saarbrücken and Lebach–Jabach have been operated with class 628 diesel multiple unit.

All buildings have two storeys, simply cut segmented arched windows, stepped corners and capital-like recesses.