The Lehbach, in its upper reaches also called Spalbach, is a right-hand tributary of the Ruwer in the county of Trier-Saarburg in the German state of Rhineland-Palatinate. It has a length of 6.602 kilometres (4.102 mi), a catchment area of 12.794 square kilometres (4.940 sq mi). Its GKZ is 26562.