The "Irish mob" refers to various organized crime groups primarily composed of individuals of Irish descent, particularly active in the United States. These groups emerged in the late 19th and early 20th centuries, often involved in illegal activities such as bootlegging, gambling, and extortion. They were known for their strong ties to local communities and often operated in cities like Boston and New York. One of the most notorious factions of the Irish mob was the Winter Hill Gang, which operated in Boston during the 1970s and 1980s. The Irish mob has been depicted in popular culture, including films and television shows, highlighting their influence and the complex relationships they had with other crime organizations, such as the Italian Mafia.