 Langenbach borders in the northeast on the municipality of Konken, in the southeast on the municipality of Herschweiler-Pettersheim, in the south on the municipality of Krottelbach, in the southwest on the town of Sankt Wendel and in the northwest on the municipality of Selchenbach.Langenbach also meets the municipality of Albessen at a single point in the north.Also belonging to Langenbach is the outlying homestead of Langenbacher Mühle.