Real Sociedad de Fútbol, S.A.D., more commonly referred to as Real Sociedad or La Real, is a Spanish football club based in the city of San Sebastián, Basque Country, founded on 7 September 1909. It plays its home matches at the Anoeta Stadium. Real Sociedad won the Liga title in 1980–81 and 1981–82, and last finished runners-up in 2002–03. The club has also won the Copa del Rey twice, in 1909 and 1987. It contests the Basque derby against rivals Athletic Bilbao. Real Sociedad were founder members of La Liga in 1929, and its longest spell in the top flight was for 40 seasons, from 1967 to 2007.
Up until 1989, the club followed a similar signing policy of only Basque players as rivals Athletic, before signing Republic of Ireland forward John Aldridge. While a strong Basque contingent has been retained among its players, nowadays both non-Basque Spaniards and foreign players are represented at the club. Its youth section post the all-Basque era has still been very successful in developing internationally renowned players, such as World Cup winners Xabi Alonso and Antoine Griezmann.
The club has competed in the UEFA Champions League twice.