Franz Anton von Harrach zu Rorau (born 2 October 1665, Vienna – 18 July 1727, Salzburg) was appointed coadjutor of Vienna and Titular Bishop of Epiphania in Syria in 1701, was from 1702 to 1705 Prince-Bishop of Vienna, 1705 coadjutor of Salzburg, and ruled from 1709 to 1727 as one of the most important Prince-Archbishops of Salzburg.