Leopold Maximilian Graf von Firmian (11 October 1766, Trento – 29 November 1831, Vienna) was Auxiliary Bishop in Passau and Titular Bishop of Tiberias from 1797, from 1800 to 1816 Bishop of Lavant, was appointed Archbishop of Salzburg in 1816, but in 1818 was only confirmed as administrator of the Archdiocese of Salzburg.
From 1822 to 1831 he was Prince-Archbishop of Vienna.