Kümbdchen is a municipality located in the Rhein-Hunsrück-Kreis district of Rhineland-Palatinate, Germany. It functions as an Ortsgemeinde within the Verbandsgemeinde Simmern-Rheinböllen.
The administrative seat for the collective municipality of Simmern-Rheinböllen is situated in Simmern. Kümbdchen serves as one of the constituent local communities within this regional administrative structure.