Achtelsbach is an Ortsgemeinde, or municipality, located in the Birkenfeld district within the German state of Rhineland-Palatinate. It functions as a constituent part of the Verbandsgemeinde of Birkenfeld, which is a type of collective municipality.
The administrative seat for the Verbandsgemeinde of Birkenfeld is situated in the town of Birkenfeld itself. Achtelsbach serves as one of the local communities governed under this collective municipal structure.