Associazione Calcio Milan (Italian pronunciation: [assotʃatˈtsjoːne ˈkaltʃo ˈmiːlan]), commonly referred to as AC Milan (Italian pronunciation: [a tˌtʃi mˈmiːlan]) or simply Milan, is an Italian professional football club based in Milan, Lombardy. Founded in 1899, the club competes in the Serie A, the top tier of Italian football, and has spent its entire history there with the exception of the 1980–81 and 1982–83 seasons.

Domestically, AC Milan has won 19 league titles, making it the third-most successful club in the Serie A behind Juventus and city rivals Inter Milan.[9] The club has also won 5 Coppa Italia titles and 7 Supercoppa Italiana titles. In international competitions, Milan’s 18 FIFA and UEFA trophies are the third highest out of any club in the world (joint with Boca Juniors and Independiente), and the most out of any Italian club. Milan has won seven European Cup/Champions League titles, a joint record five UEFA Super Cups, two UEFA Cup Winners’ Cups, a joint record three Intercontinental Cups and one FIFA Club World Cup. Milan’s major European honours also include a joint record two Latin Cups.

In its early history, Milan played its home games in different grounds around the city before moving to its current stadium, the San Siro, in 1926. The stadium, which was built by Milan’s second chairman, Piero Pirelli and has been shared with Inter Milan since 1947, is the largest in Italian football, with a total capacity of 75,817. AC Milan has a long-standing rivalry with Inter, with whom they contest the Derby della Madonnina, one of the most followed derbies in football.

The club is one of the wealthiest in Italian and world football. It was a founding member of the now-defunct G-14 group of Europe’s leading football clubs as well as its replacement, the European Club Association.