Inner Austria (German: Innerösterreich, Slovene: Notranja Avstrija, Italian: Austria Interiore) was a term used from the late 14th to the early 17th century for the Habsburg hereditary lands south of the Semmering Pass, referring to the Imperial duchies of Styria, Carinthia and Carniola and the lands of the Austrian Littoral. The residence of the Inner Austrian archdukes and stadtholders was at the Burg castle complex in Graz.
The Inner Austrian territory stretched from the northern border with the Archduchy of Austria on the Alpine divide over Upper and Lower Styria down to Carniola, where the Lower and White Carniolan lands (the former Windic March) bordered on the Habsburg Kingdom of Croatia. In the west, the Carinthian lands stretched to the Archbishopric of Salzburg and the Habsburg County of Tyrol, while in the east, the Mur River formed the border with the Kingdom of Hungary.