The Sicilian Mafia Commission, known as Commissione or Cupola, is a body of leading Sicilian Mafia members who decide on important questions concerning the actions of, and settling disputes within the Sicilian Mafia or Cosa Nostra. It is composed of representatives of a mandamento who are called capo mandamento or rappresentante. The Commission is not a central government of the Mafia, but a representative mechanism for consultation of independent Mafia families who decide by consensus. Its primary role is to keep the use of violence among families within limits tolerable to the public and political authorities.

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.