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

The two red roses with green sepals and silver centres, with their Isenburg tinctures refer to the first documentary mention.

The silver roof with its noteworthy ridge turret stands in the red point for the old bakehouse of Untershausen.

The three-leafed beech twig stands with its green tincture for the forest and the Untershausen municipal area.

The nearest InterCityExpress stops are the railway stations at Montabaur on the Cologne-Frankfurt high-speed rail line and Koblenz on the Rechte Rheinstrecke.