A Sixth Family is a crime family or criminal organization, usually an Italian-American or Italian-Canadian crime group, that has become powerful or notable enough to rise to a level comparable or close to that of the Five Families of the New York City Italian-American Mafia. A criminal organization deemed a "Sixth Family" may rival the Five Families or, alternatively, work closely enough with the Five Families that it appears to be a peer or near coequal of the families.
Various criminal organizations have been deemed the "Sixth Family", often by the press or the criminal underworld. One of the more notable organizations to receive the designation is the Rizzuto crime family based in Montreal, Quebec, Canada, though the Rizzuto family does not refer to itself as the "Sixth Family". One of the most powerful North American Mafia families, the Rizzuto family has worked closely with the New York Five Families.
Other criminal organizations referred to as the "Sixth Family" include: