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Hamburger Sport-Verein commonly known as Hamburger SV or HSV , is a German sports club based in Hamburg, with its largest branch being its football department. Though the current HSV was founded in June 1919 from a merger of three earlier clubs, it traces its origins to 29 September 1887 when the first of the predecessors, SC Germania, was founded.

HSV has won the German national championship six times, the DFB-Pokal three times and the former League Cup twice. The team's most successful period was from the mid-1970s until the mid-1980s when, in addition to several domestic honours, they won the 1976–77 European Cup Winners' Cup and the 1982–83 European Cup. The outstanding players of this period were Horst Hrubesch, Manfred Kaltz, and Felix Magath, all regulars in the West German National Team. To date, HSV's last major trophy was the 1986–87 DFB-Pokal. Up until the 2017–18 Bundesliga season, which found the team relegated for the first time in history, HSV's football team had the distinction of being the only team that had played continuously in the top tier of the German football league system since the founding of the club at the end of World War I. It was subsequently the only team that had played in every season of the Bundesliga since its foundation in 1963.

HSV play their home games at the Volksparkstadion in Bahrenfeld, a western district of Hamburg. The club colours are officially blue, white and black but the home kit of the team is white jerseys and red shorts. The team's most common nickname is "die Rothosen" (the Red Shorts). As it is one of Germany's oldest clubs, it is also known as der Dinosaurier (the Dinosaur). HSV have rivalries with Werder Bremen, with whom they contest the Nordderby, and Hamburg-based FC St. Pauli, with whom they contest the Hamburg derby.