Oberkirn is an Ortsgemeinde, or municipality, located in the Birkenfeld district of Rhineland-Palatinate, Germany. It functions as a constituent part of the Verbandsgemeinde Herrstein-Rhaunen, which is a collective municipality with its administrative seat situated in Herrstein.
The village is situated within the southwestern region of Germany, characterized by its integration into the local administrative structure of the Herrstein-Rhaunen district.