Real Madrid Club de Fútbol (Spanish pronunciation: [reˈal maˈðɾið ˈkluβ ðe ˈfuðβol] (listen), meaning Royal Madrid Football Club), commonly referred to as Real Madrid, is a Spanish professional football club based in Madrid who currently play in La Liga.

Founded in 1902 as Madrid Football Club, the club has traditionally worn a white home kit since its inception. The honorific title real is Spanish for "royal" and was bestowed to the club by King Alfonso XIII in 1920 together with the royal crown in the emblem. Real Madrid have played their home matches in the 81,044-capacity Santiago Bernabéu Stadium in downtown Madrid since 1947. Unlike most European sporting entities, Real Madrid's members (socios) have owned and operated the club throughout its history. The club is one of the most widely supported in the world, and was estimated to be worth $5.1 billion in 2022, making it the world's most valuable football team. In 2021, it was the second highest-earning football club in the world, with an annual revenue of €640.7 million.

One of the three founding members of La Liga that have never been relegated from the top division since its inception in 1929 (along with Athletic Bilbao and Barcelona), Real Madrid holds many long-standing rivalries, most notably El Clásico with Barcelona and El Derbi Madrileño with Atlético Madrid. The club established itself as a major force in both Spanish and European football during the 1950s and 60s, winning five consecutive and six overall European Cups and reaching a further two finals. This success was replicated on the domestic front, with Madrid winning twelve league titles in the span of 16 years. This team, which included Alfredo Di Stéfano, Ferenc Puskás, Francisco Gento, and Raymond Kopa, is considered by some in the sport to be the greatest of all time. Real Madrid is known for it's "Galácticos" policy, which involves signing the world's best players, such as Ronaldo, Zidane, and David Beckham, to create a superstar team. On June 26 2009, Madrid signed Cristiano Ronaldo for a record breaking £80 million (€94 million) pounds, who went on becoming one of the most successful players in the history of football and becoming all time top goalscorer.

In domestic football, the club has won 68 trophies; a record 35 La Liga titles, 19 Copa del Rey, 12 Supercopa de España, a Copa Eva Duarte, and a Copa de la Liga. In European football, Real Madrid have won a record 21 trophies; a record 14 European Cup/UEFA Champions League titles, two UEFA Cups, and a record five UEFA Super Cups. In worldwide competitions, they have achieved a record eight club world championships.

Real Madrid was recognised as the best football club of the 20th century by FIFA and as the best European club during the same timeframe by the IFFHS with 42.35% of the vote, whilst also receiving the FIFA Centennial Order of Merit in 2004. Real Madrid is the only club to have won three-peat twice in the European Cup/Champions League, first in 1955–56, 1956–57, and 1957–58, and second in 2015–16, 2016–17, and 2017–18, and is the first club across all of Europe's top five leagues to win 100 trophies in all competitions. As of March 2023, Real Madrid are ranked fifth in the UEFA club rankings.