Fernitz-Mellach is located in the south part of the Graz-Umgebung District, about 10 kilometres (6.2 mi) south of Graz. The municipality runs along the Mur River.
Municipality arrangement
The municipality territory includes the following five sections (population as of 1 January 2015[4]):
^§ 3 Abs. 3 Z 2 des Gesetzes vom 17. Dezember 2013 über die Neugliederung der Gemeinden des Landes Steiermark (Steiermärkisches Gemeindestrukturreformgesetz – StGsrG). Landesgesetzblatt für die Steiermark, of 2 April 2014. Nr. 31, Jahrgang 2014. ZDB-ID705127-x. p. 3.