Reidenhausen (sometimes also Rodenhausen), which together with Blankenrath formed a single municipality, was under French rule in 1794 separated from its neighbour.

Under the Verwaltungsvereinfachungsgesetz ("Administration Simplification Law") of 18 July 1970, with effect from 7 November 1970, the municipality was grouped into the Verbandsgemeinde of Zell.

[1] The German blazon reads: Das Wappen der Ortsgemeinde Reidenhausen besteht aus einer eingeschweiften gestürzten Spitze, darin in Grün eine goldene Lilie, gespalten; vorne rot-silbern geschacht, hinten in Silber ein rotes Balkenkreuz.

The "chequy" pattern on the dexter (armsbearer's right, viewer's left) side is drawn from the arms formerly borne by the Counts of Sponheim, who until the 18th century laid claim to the whole of the Hunsrück.

The red cross on the sinister (armsbearer's left, viewer's right) side was the heraldic device borne by the Electorate of Trier, the former feudal overlord.