Giuseppe Firrao (20 July 1736 – 24 January 1830) was an Italian Roman Catholic Cardinal.

He initiated his formal education in Naples, studied humanities at Collegio Nazareno and later completed a doctorate in canon and civil law at La Sapienza University, Rome.

On 25 February 1782 Firrao was elected titular archbishop of Petra in Palaestina and appointed nuncio in Venice on 8 April 1782.

Pope Pius VII elevated him to cardinal in the consistory of 23 February 1801 with the title of Sant'Eusebio.

In the period of 1802 - 1803 he was made Camerlengo of the College of Cardinals and First Priest of the same high ecclesiastical body 1823 - 1830.