Diez is a Verbandsgemeinde ("collective municipality") in the Rhein-Lahn-Kreis, in Rhineland-Palatinate, Germany. Its seat is in Diez.
The Verbandsgemeinde Diez consists of the following Ortsgemeinden ("local municipalities"):
Altendiez Aull Balduinstein Birlenbach Charlottenberg Cramberg Diez Dörnberg Eppenrod Geilnau Gückingen Hambach <li> Heistenbach <li> Hirschberg <li> Holzappel <li> Holzheim <li> Horhausen <li> Isselbach <li> Langenscheid <li> Laurenburg <li> Scheidt <li> Steinsberg <li> Wasenbach