Leopold Anton Eleutherius Freiherr von Firmian was Bishop of Lavant 1718–24, Bishop of Seckau 1724–27 and Prince-Archbishop of Salzburg from 1727 until his death.
- Occupation
- Catholic priest, Catholic bishop
- Position held
- Roman Catholic Archbishop of Salzburg, diocesan bishop, Roman Catholic Bishop of Lavant, Prince-Bishop
- Citizenship
- Cisleithania
- Born
- March 11, 1679, May 27, 1679
- Died
- October 22, 1744
