Illerich is an Ortsgemeinde, or municipality, located in the Cochem-Zell district of Rhineland-Palatinate, Germany. It functions as a member of the Verbandsgemeinde of Kaisersesch, which is a type of collective municipality.
The administrative seat for the Verbandsgemeinde to which Illerich belongs is situated in the town of Kaisersesch. The municipality serves as a local administrative unit within this regional structure in western Germany.