Real Sociedad de Fútbol, S.A.D., more commonly referred to as Real Sociedad (pronounced: [reˈal soθjeˈðað]; Royal Society) or La Real, is a Spanish football club based in the city of San Sebastián, Basque Country,Spain founded on 7 September 1909. Its home stadium is Anoeta, which seats 32,200 spectators. Real Sociedad won the La Liga title in 1980–81 and 1981–82, and last finished runners-up in 2002–03. La Real has also won the Copa del Rey twice, in 1909 and 1987. The club play the Basque derby against Athletic Bilbao. Real Sociedad were founder members of La Liga in 1928, and their longest spell in the top flight was for 40 seasons from 1967 to 2007.
The club has competed in the UEFA Champions League twice. In the 2003–04 season the club made it to the round of 16 before losing to French club Olympique Lyon.
Real Sociedad has also several sports sections: women's football, track and field, field hockey and basque pelota.
The club's name means Royal Society of Football in Spanish. During the Second Spanish Republic (1931–1939), it was renamed "Donostia Club de Fútbol". The club is nicknamed in Basque as Erreala or the txuri-urdin ("white-blue" due to the colours of their kit). The colours stem from the flag of San Sebastian: a blue canton on a white field.