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

The community lies in the Westerwald between Montabaur and Koblenz in the Nassau Nature Park.

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

The community's arms recalls, with the cross pattée resembling the Teutonic Knights’ cross and the black eagle's head as part of the whole, the community's almost 600-year allegiance to the Koblenz House of the Teutonic Knights.

The red cross and the tincture silver stand for the overlordship of the Electorate of Trier.