Sergio Panunzio (20 July 1886 – 8 October 1944) was an Italian theoretician of national syndicalism.
Panunzio became the head of the Fascist Faculty of Political Sciences at Perugia University in 1928.
He pointed to Georges Sorel and Francesco Saverio Merlino as revising Karl Marx to fit the times and emboldening it.
He is said to have spearheaded the revisionism that led many syndicalists through interventionism to corporativism and he ostensibly "gave Mussolini's dictatorship a veneer of revolutionary legitimacy".
A strong supporter of the state for its own sake, he had a long-running academic dispute with the corporatist Carlo Costamagna regarding the role of fascism.