Guido Donegani (26 March 1877 in Livorno – 16 April 1947 in Bordighera), was a prominent Italian engineer, businessman and politician.
He was CEO and President of the Italian chemical industrial giant Montecatini from 1910-1945.
Due to his support to the Fascist regime of Benito Mussolini he was arrested at the end of the Second World War, but acquitted of charges of collaboration.