The Leone crime family is a prominent organized crime group based in New York City. It is part of the larger Italian-American Mafia and was founded in the early 20th century. The family gained significant power during the mid-20th century, particularly under the leadership of Frank Costello and later Carlo Gambino. The Leone family is known for its involvement in various illegal activities, including racketeering, extortion, and gambling. Over the years, it has been involved in numerous high-profile criminal cases and has faced law enforcement crackdowns. Despite these challenges, the family has maintained a degree of influence within organized crime circles.