Welkenbach is an Ortsgemeinde – a community belonging to a Verbandsgemeinde – in the Westerwaldkreis in Rhineland-Palatinate, Germany.
The community lies in the Westerwald between Limburg an der Lahn and Siegen. Verbandsgemeinde of Hachenburg, a kind of collective municipality. Its seat is in the like-named town.
In 1315, Welkenbach had its first documentary mention as Welkemerode.
The council is made up of 7 council members, including the extraofficial mayor (Bürgermeister), who were elected in a majority vote in a municipal election on 13 June 2004.
The community lies west of Bundesstraße 8, leading from Limburg an der Lahn nach Siegburg. The nearest Autobahn interchanges are in Dierdorf and Neuwied on the A 3 (Cologne–Frankfurt). The nearest InterCityExpress stop is the railway station at Montabaur on the Cologne-Frankfurt high-speed rail line.