 Selchenbach is a linear village – by some definitions a thorpe – that lies at the Oster valley in the Western Palatinate, right on the boundary with the Saarland.Selchenbach lies at an elevation of 380 to 390 m above sea level on the upper reaches of the Selchenbach.The Selchenbach itself rises south of the municipal area near the Königreicher Hof, flows through the village of Selchenbach and then the village of Herchweiler to the north and then turns in a broad bow back south, emptying near Haupersweiler into the Oster.