Rengsdorf is a former Verbandsgemeinde ("collective municipality") in the district of Neuwied, in Rhineland-Palatinate, Germany. In January 2018 it was merged into the new Verbandsgemeinde Rengsdorf-Waldbreitbach. The seat of the Verbandsgemeinde was in Rengsdorf.
The Verbandsgemeinde Rengsdorf consisted of the following Ortsgemeinden ("local municipalities"):