Flammersfeld is a municipality in the district of Altenkirchen, in Rhineland-Palatinate, Germany. It is situated in the Westerwald, approx. 35 km north of Koblenz.
Flammersfeld was the seat of the former Verbandsgemeinde ("collective municipality") Flammersfeld.
The former Flammersfeld train station located in Seelbach (near Flammersfeld) on the Engers-Au railway line, the section from Siershahn to Altenkirchen nowadays is only served by fright trains, as well as the Linz (Rhine) -flammersfeld railway (Kasbachtalbahn), which currently is not in service for public transport or fright traffic at all.