Associazione Calcio Milan, commonly referred to as A.C. Milan or simply Milan, is a professional football club based in Milan, Lombardy, Italy. Milan was founded in 1899 by English lace-maker Herbert Kilpin and businessman Alfred Edwards among others. The club has spent its entire history, with the exception of the 1980–81 and 1982–83 seasons, in the top flight of Italian football, known as Serie A since 1929–30.

With 18 officially recognised UEFA and FIFA titles, they are the third most successful club in the world in terms of number of international titles, together with Boca Juniors but behind Real Madrid and Al Ahly, both with 20 titles. Milan has won a joint record of three Intercontinental Cups and one of its successor, the FIFA Club World Cup. Milan have also won the European Cup / Champions League on seven occasions, second only to Real Madrid.[10] They have also won the UEFA Super Cup a joint record five times and the Cup Winners’ Cup twice. Milan has won every major competition in which it has competed, with the exception of the Europa League (in this competition they have lost two semi-finals, in 1972 and 2002). Domestically, with 18 league titles, Milan is the joint-second most successful club in Serie A, behind Juventus (32 titles), along with local rivals Internazionale. They have also won the Coppa Italia five times, as well as six Supercoppa Italiana triumphs.

Milan’s home games are played at San Siro, also known as the Stadio Giuseppe Meazza. The stadium, which is shared with long-lasting city rivals Internazionale, is the largest in Italian football, with a total capacity of 80,018. Inter are considered their biggest rivals, and matches between the two teams are called Derby della Madonnina, which is one of the most followed derbies in football. As of 2016, Milan is the second most supported team in Italy, along with local rivals Internazionale, and the seventh-most supported team in Europe, ahead of any other Italian team.

The owner of the club is former Italian prime minister and controlling shareholder of Mediaset Silvio Berlusconi. The vice-president is Adriano Galliani. The club is one of the wealthiest and most valuable 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.