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.

Trub is one of the largest municipalities of Switzerland (62 km²) in size, but not in population. It is located in the Emmental region of the canton of Bern in the administrative district of Emmental.