Marbach is a former municipality in the district of Entlebuch in the canton of Lucerne in Switzerland. On 1 January 2013 the former municipalities of Escholzmatt and Marbach merged to form the new municipality of Escholzmatt-Marbach.

Entlebuch District is one of six districts of the canton of Lucerne, Switzerland. Its administrative center is the village of Schüpfheim. Entlebuch District roughly corresponds to the basin of the river Kleine Emme. The district receives its name from the village of Entlebuch, which is in turn named for the rivers Grosse and Kleine Entle, a right tributary of Kleine Emme.