Luciano Leggio was an Italian criminal and leading figure of the Sicilian Mafia. He was the head of the Corleonesi, the Mafia faction that originated in the town of Corleone. He is universally known by the surname Liggio, a result of a misspelling in court documents in the 1960s.

The Sicilian Mafia or Cosa Nostra, also referred to as simply Mafia, is a criminal society originating on the island of Sicily and dates back to the mid-19th century. It is an association of gangs which sell their protection and arbitration services under a common brand. The Mafia's core activities are protection racketeering, the arbitration of disputes between criminals, and the organizing and oversight of illegal agreements and transactions.