Hahnstätten is a municipality in the Rhein-Lahn-Kreis, in Rhineland-Palatinate, Germany. It is situated on the river Aar, approx. 10km south of Limburg an der Lahn, and 35km east of Koblenz.
Hahnstätten is the seat of the Verbandsgemeinde ("collective municipality") Hahnstätten.