Sacco & Vanzetti (Italian: Sacco e Vanzetti, French: Sacco et Vanzetti) is a 1971 docudrama film written and directed by Giuliano Montaldo, based on the events surrounding the trial and execution of Nicola Sacco and Bartolomeo Vanzetti, two anarchists of Italian origin, who were sentenced to death for murdering a guard and a paymaster during the April 15, 1920, armed robbery of the Slater and Morrill Shoe Company in Braintree, Massachusetts.

The film stars Gian Maria Volonté as Vanzetti, Riccardo Cucciolla as Sacco, Cyril Cusack as prosecutor Frederick G. Katzmann, Geoffrey Keen as presiding justice Webster Thayer, Milo O'Shea as defense attorney Fred Moore, with Rosanna Fratello, William Prince, and Sergio Fantoni. The musical score was composed and conducted by Ennio Morricone with the three-part ballad sung by Joan Baez. The film is mainly shot in colour although it both starts and finishes in black and white, and also includes period black and white newsreels.

The film was an Italian and French co-production, shot on-location in Dublin, Ireland. It was released in separate Italian and English-language versions.