The Montreal Mafia refers to organized crime groups operating in Montreal, Canada. Primarily composed of Italian criminal organizations, it has been historically dominated by the Calabrian 'Ndrangheta and the Sicilian Mafia. These groups engage in various illegal activities, including drug trafficking, extortion, and money laundering. The Montreal Mafia has a complex history, particularly during the mid-20th century when it was heavily influenced by figures like Vito Rizzuto. The Rizzuto crime family became a significant player in the city's underworld, establishing connections with other organized crime groups across North America. Law enforcement continues to combat their influence, but the Mafia remains a notable presence in the region.