Dieffenbach may refer to:

People Dieffenbach (surname)

Places Dieffenbach-au-Val (Diefenbach im Tal), Bas-Rhin, France Dieffenbach-lès-Wœrth, Bas-Rhin, France

See also Diefenbach, Germany Diffembach-lès-Hellimer (Diefenbach), Moselle, France Diffenbach-lès-Puttelange (Diefenbach), Moselle, France