Nicola Bombacci (24 October 1879 – 28 April 1945), born at Civitella di Romagna, was an Italian Marxist socialist who was a member of the Italian Socialist Party in the late 19th and early 20th centuries, and who later became an Italian Fascist. Initially a friend and disciple of Lenin, in 1921 he became one of the founding fathers of the Italian Communist Party. Bombacci was a friend of future Italian Fascist dictator Benito Mussolini.