Supporters of FC Barcelona in the context of "FC Barcelona"

Futbol Club Barcelona is a professional association football club based in Barcelona, Catalonia, Spain. Founded by a group of Swiss, German, English and Catalan footballers led by Joan Gamper, the club has become a symbol of Catalan culture and Catalanism, hence the motto "Més que un club" (More than a club). The official Barça anthem is the "Cant del Barça", written by Jaume Picas and Josep Maria Espinàs. Unlike many other football clubs, the socis, who are the members and supporters of the club, own and operate Barcelona. It is the world's fourth richest football club in terms of revenue, with an annual turnover of €800.1 million in the 2022–23 season.

Barcelona played its first friendly match on 8 December 1899 against the English colony in Barcelona in the old velodrome in Bonanova. Initially, Barcelona played against other local clubs in various Catalan tournaments. In 1929, the club became one of the founding members of La Liga, Spain's first national league, and has since achieved the distinction of being one of only three clubs to have never been relegated, along with Real Madrid and Athletic Bilbao. Barcelona is also the only European club to have played continental football every season since 1955. They hold a long-standing rivalry with Real Madrid, with matches between the two teams referred to as "El Clásico" (El Clàssic in Catalan). Matches against city rivals Espanyol are known as the "Derbi barceloní".