Seggauberg is a former municipality in the district of Leibnitz, in the Austrian state of Styria. It is located in southern Styria, in the Leibnitz area near the border with Slovenia.
Since the 2015 Styria municipal structural reform, Seggauberg has been part of the municipality of Leibnitz rather than an independent municipality. The reform merged numerous small Styrian municipalities into larger administrative units.