Daubach is an Ortsgemeinde – a community belonging to a Verbandsgemeinde – in the Westerwaldkreis in Rhineland-Palatinate, Germany.

It belongs to the Verbandsgemeinde of Montabaur, a kind of collective municipality.

The community lies west of Bundesautobahn 3, five kilometres from Montabaur, to the lee of the Stelzenbach Forest, above the Gelbach Valley and only seven kilometres from the Lahn Valley with its episcopal town, Limburg an der Lahn.

Daubach is nowadays a residential community without any established industry.

The approval for the community to bear its own arms was granted on 14 April 1981 by the government assistant.