The Five Families are the five major Italian-American Mafia crime families which have dominated organized crime in New York City since the 1930s. The Five Families, under the suggestion of Salvatore Maranzano and Charlie "Lucky" Luciano, were responsible for the establishment of The Commission, a council which demarcated territory between the previously warring factions and governs Cosa Nostra activities in the United States. The Five Families in New York remain as the powerhouse of the Sicilian Mafia in the US.
The five families and their bosses are (currently):
Bonanno Crime family: Vincent "Vinny Gorgeous" Basciano (Salvatore Montagna is the acting boss)
Gambino Crime family: Nicholas "Little Nick" Corozzo and Jackie "Nose" D'Amico
Colombo Crime family: Carmine "Junior" Persico (Thomas Gioeli is the acting boss)
Genovese Crime family: Daniel "Danny the Lion" Leo
Lucchese Crime family: Vittorio "Vic" Amuso (Steven "Wonderboy" Crea is the acting boss)
The Colombo family was once known as the Profaci Crime Family, until a coup caused a name change in the early 1960s. Former Godfather Joe Massino had wanted to change the name of the Bonanno Family to the Massino Family but since his arrest and defection it is unlikely to happen. The DeCavalcante crime family, based out of nearby Elizabeth, NJ, also has ties to the five New York families.