Club Atlético de Madrid, S.A.D. (Spanish pronunciation: [ˈkluβ aˈtletiko ðe maˈðɾið]; meaning \"Athletic Club of Madrid\"), commonly referred to as Atlético Madrid or simply Atlético, is a Spanish professional football club based in Madrid that plays in La Liga. The club play their home games at the Riyadh Air Metropolitano, which has a capacity of 70,692.

Founded on 26 April 1903 as Athletic Club Sucursal de Madrid, the club have traditionally worn red and white vertical striped shirts, being known as Los Colchoneros (\"The Mattress Makers\") and Los Rojiblancos (\"The Redwhites\"). The club became Atlético de Madrid in 1946 and began a long-standing rivalry with Madrid neighbours Real Madrid, with whom they contest El Derbi Madrileño. They also share a rivalry with Barcelona. Felipe VI, the King of Spain, has been the honorary president of the club since 2003.

Atlético are one of the most successful Spanish clubs, having won 11 La Liga titles, including a league and cup double in 1996. Further domestic trophies include 10 Copa del Rey titles, two Supercopas de España, one Copa Presidente FEF and one Copa Eva Duarte. They have also won numerous titles in Europe, including the European Cup Winners' Cup in 1962, the UEFA Europa League in 2010, 2012 and 2018, and the UEFA Super Cup in 2010, 2012 and 2018, in addition to the 1974 Intercontinental Cup. In the UEFA Champions League, Atlético reached the final in 1974, 2014 and 2016.