Hornbach is a town in the Südwestpfalz district, in Rhineland-Palatinate, Germany. It is situated southwest of the Palatinate forest, on the bord…Hornbach is a town in the Südwestpfalz district, in Rhineland-Palatinate, Germany. It is situated southwest of the Palatinate forest, on the border with France, south of Zweibrücken. It is part of the Verbandsgemeinde Zweibrücken-Land.