Otto von Habsburg, the last Crown Prince of Austria-Hungary (died 2011)

Otto von Habsburg was the last crown prince of Austria-Hungary from 1916 until the dissolution of the empire in November 1918. In 1922, he became the pretender to the former thrones, head of the House of Habsburg-Lorraine, and sovereign of the (Austrian) Order of the Golden Fleece, upon the death of his father. He resigned as Sovereign of the Golden Fleece in 2000 and as head of the Imperial House in 2007.

This is a list of people who were heir apparent or heir presumptive to the Archduchy of Austria from when Leopold VI permanently unified the Archduchy in 1665 to the end of the monarchy in Austria-Hungary in 1918. Those heirs who succeeded are shown in bold.

Austria-Hungary, also referred to as the Austro-Hungarian Empire, the Dual Monarchy or the Habsburg Monarchy, was a multi-national constitutional monarchy in Central Europe between 1867 and 1918. A military and diplomatic alliance, it consisted of two sovereign states with a single monarch who was titled both the Emperor of Austria and the King of Hungary. Austria-Hungary constituted the last phase in the constitutional evolution of the Habsburg monarchy: it was formed with the Austro-Hungarian Compromise of 1867 in the aftermath of the Austro-Prussian War, following wars of independence by Hungary in opposition to Habsburg rule. It was dissolved shortly after Hungary terminated the union with Austria in 1918 at the end of World War I.