Simmern-Rheinböllen is a Verbandsgemeinde (collective municipality) in the Rhein-Hunsrück-Kreis, Rhineland-Palatinate, Germany. The seat of the Verbandsgemeinde is in Simmern. It was formed on 1 January 2020 by the merger of the former Verbandsgemeinden Simmern and Rheinböllen.