The Italicus Express massacre was a terrorist bombing in Italy on a train of the public rail network. On 4 August 1974, the bomb attack killed 12 people and wounded 48. Responsibility was claimed by the neo-fascist terrorist organization Ordine Nero.

Terrorism in Italy is related to political and subversive terrorism activities, carried out by various groups and organizations with different and sometimes conflicting methods, motivations and interests. This article is primarily about late 20th-century and early 21st-century terrorism.