A caporegime or capodecina, usually shortened to just a capo, is a term used in the Mafia for a high ranking made member of a crime family who heads a "crew" of soldiers and has major social status and influence in the organization. Caporegime is an Italian word, which is used to signify the head of a family in Sicily, but has now come to mean a ranking member, similar to captain or senior sergeant in a military unit. In general, the term indicates the head of a branch of an organized crime syndicate who commands a crew of soldiers and reports directly to a boss or an underboss.

The Mafia, particularly the American Mafia, is typically divided into distinct and partially independent "crews" headed by a "capo" or leader of the individuals. Individual crew members report to the capo. The crew collects protection and other money for the capo, who at regular intervals gives a share (or "taste") of the collected money to the underboss and/or the boss. Estimates of average income of a capo varies and is difficult to quantify. Income is dependent on the success and size of a capo's crew and the state of the economy at the time.