 The municipal area measures 415 ha, of which roughly 11 ha is settled and 57 ha is wooded.Langweiler borders in the north on the municipality of Sien, in the northeast on the municipality of Hoppstädten, in the east on the municipality of Merzweiler, in the south on the municipality of Homberg and in the west on the municipality of Unterjeckenbach.Langweiler also meets the municipality of Herren-Sulzbach at a single point in the southeast.