Diefenbach is an Ortsgemeinde, or municipality, located within the Bernkastel-Wittlich district of Rhineland-Palatinate, Germany. It functions as a constituent part of a Verbandsgemeinde, which is a specific type of collective municipality used in the region.
The town serves as a local administrative unit situated in the western part of the German state. Its primary classification is defined by its membership within the larger municipal structures of the Bernkastel-Wittlich district.