Rengsdorf-Waldbreitbach is a Verbandsgemeinde ("collective municipality") in the district of Neuwied, in Rhineland-Palatinate, Germany. The seat of the Verbandsgemeinde is in Rengsdorf. It was formed on 1 January 2018 by the merger of the former Verbandsgemeinden Rengsdorf and Waldbreitbach.
The Verbandsgemeinde Rengsdorf-Waldbreitbach consists of the following Ortsgemeinden ("local municipalities"):