Archduke Wilhelm Franz Karl of Austria-Teschen (German: Erzherzog Wilhelm Franz Karl von Habsburg-Lothringen, 21 April 1827 – 29 April 1894) was an Archduke of Austria from the House of Habsburg.

[1] He was born in Vienna as the son of Archduke Charles, Duke of Teschen (1771–1847) and Princess Henrietta of Nassau-Weilburg (1797–1829).

He studied political sciences at the University of Vienna and he was a student of Joseph von Kudler.

He gained the rank of Feldzeugmeister in the service of the Austrian Army in January 1867, after commanding the artillery and being wounded at the Battle of Königgrätz (1866).

Archduke Wilhelm of Austria, as a professed Catholic Religious Brother, died unmarried and without issue on 29 July 1894 in Weikersdorf after falling from a horse.