Dahn is a municipality in the Südwestpfalz district, in Rhineland-Palatinate, Germany. It is situated in the Palatinate Forest, approximately 15 km …Dahn is a municipality in the Südwestpfalz district, in Rhineland-Palatinate, Germany. It is situated in the Palatinate Forest, approximately 15 km southeast of Pirmasens, and 25 km west of Landau. It is part of the Verbandsgemeinde of Dahner Felsenland.