Dreisbach is an Ortsgemeinde – a community belonging to a Verbandsgemeinde – in the Westerwaldkreis in Rhineland-Palatinate, Germany.
The community lies in the Westerwald between Limburg and Siegen. The river Nister, which is part of the river Sieg’s drainage basin flows from east to west through the municipal area. Dreisbach belongs to the Verbandsgemeinde of Bad Marienberg, a kind of collective municipality. Its seat is in the like-named town.
In 1252, Dreisbach had its first documentary mention.
The council is made up of 12 council members who were elected in a majority vote in a municipal election on 7 June 2009.
South of the community runs Bundesstraße 255, which leads from Montabaur to Herborn. The nearest Autobahn interchange is Montabaur on the A 3 (Cologne–Frankfurt), some 22 km away. The nearest InterCityExpress stop is the railway station at Montabaur on the Cologne-Frankfurt high-speed rail line.