Count Adeodato Bonasi[1] (25 March 1838 – 24 July 1920) was an Italian politician, professor, jurist and soldier who served as President of the Senate from 1918 to 1919.

Bonasi was born on 25 March 1838 in San Felice sul Panaro to a noble Modenese family linked to the dual court.

[2] Bonasi became a professor of administrative law at the University of Modena on 27 November 1865.

He became a full professor on 10 December 1874 and remained in the position up until 11 August 1884.

[2][4] Bonasi became a councillor of state on 23 February 1886 and became section president on 16 June 1898.