Paris Saint-Germain FC supporters

Paris Saint-Germain FC are the most popular football club in France, accounting for 22% of the country's fan base. With an estimated 35 million fans, PSG are also one of the most followed football teams in the world. The Parc des Princes has been its home ground since July 1974. It has four stands: Tribune Auteuil, Tribune Paris, Tribune Borelli, and Tribune Boulogne. Historically, the Auteuil and Boulogne stands, better known as the Virage Auteuil (VA) and the Kop of Boulogne (KoB), have been home to PSG's most loyal fans, the supporters' groups known as ultras, making the Parc one of the most feared venues in Europe and one of the best in terms of atmosphere. Other friendlier, more family-oriented groups have regularly met in the stands of Paris and Borelli, including the club's first supporters' group, Les Amis du PSG, founded in 1975.

Lacking a large and passionate following, the club began offering cheaper season tickets to young fans in 1976. They were housed in Kop K, located in the Blue K Section of the Paris stand at the Parc des Princes. Following increased ticket prices, fans in Kop K moved to the Boulogne stand in 1978, and the Kop of Boulogne was born. The club's first Italian-style ultra group, the Boulogne Boys, was founded there in 1985, followed by the English-inspired kopistes Gavroches and Rangers. However, several KoB groups, such as Commando Pirate and Casual Firm, took English hooligans as dubious role models, and violence quickly escalated.

In response, the club's owners, Canal+, encouraged non-violent KoB fans to gather at the other end of the stadium, giving rise to the Virage Auteuil in 1991, spearheaded by the ultra groups Supras Auteuil, Lutece Falco and Tigris Mystic. The measure worked at first, but a violent, racially motivated rivalry slowly emerged between the two stands. The situation came to a head in 2010 before a match against Marseille. Boulogne fan Yann Lorence was killed following a brawl between groups from both stands outside the Parc, forcing PSG president Robin Leproux to take action. In what became known as the Plan Leproux, the club exiled all groups from the Parc and also banned them from away matches. It took six years for the ultras to regain their place in the stadium. Former VA supporters formed the Collectif Ultras Paris (CUP) in May 2016, and the club agreed to their return in October 2016.

PSG have granted official status to 16 groups at the Parc des Princes since 1975. Based in Auteuil, the CUP are currently the only officially recognized ultra group by the club. They share the stadium with fellow authorized groups Hoolicool, Vikings 27 and Handicap PSG in the Paris stand; and Les Amis du PSG, Titi Fosi and PSG Grand Sud in the Borelli stand. Previously, PSG also recognized Supras Auteuil, Lutece Falco and Tigris Mystic from Auteuil; Boulogne Boys, Gavroches and Rangers from Boulogne; and Authentiks, Puissance Paris and Brigade Paris from Paris. More recently, unofficial groups Block Parisii and Resistance Parisienne are trying to convince the club of relaunching the KoB. Karsud, the club's last remaining organized hooligan firm, are also still active, but have been banned from all club matches since 2017.