Großkirchheim is a town in the district of Spittal an der Drau, in the Austrian state of Carinthia. It lies in the south of Austria, within the federal state whose capital is Klagenfurt.
The municipality belongs to the Spittal an der Drau district, one of Carinthia's administrative districts, which covers the western part of the state. As a town within this district, Großkirchheim forms part of the local administrative structure of the region.
Carinthia, the southernmost Austrian state, is known for its Alpine landscape and its many mountain municipalities, of which Großkirchheim is one. The town's position in the Spittal an der Drau district places it in the western portion of the state, an area characterised by its proximity to the high mountains of the eastern Alps.