Mellach was a municipality in Austria which merged in January 2015 into Fernitz-Mellach in the Graz-Umgebung District of Styria, Austria.
Mellach lies about south of Graz in the Graz basin in the east Styrian hills on the Mur river.
The municipality comprises Dillach, Enzelsdorf, Oberenzelsdorf, and Mellach.