The 2012–13 season was Associazione Calcio Milan's 79th in the Serie A and 30th consecutive season in the top flight of Italian football. This season Milan will try to re-gain the Serie A title, which they lost to Juventus in the previous season. The Rossoneri will also compete in this season's UEFA Champions League, as well as the Coppa Italia.

The season marks the beginning of a new era for Milan with a host of veterans left the club in the summer, including Alessandro Nesta, Gennaro Gattuso, Filippo Inzaghi, Gianluca Zambrotta, and Clarence Seedorf. Also leaving were star players Thiago Silva, Zlatan Ibrahimović, Antonio Cassano during the summer, and Alexandre Pato in the winter.

In the Serie A, Milan finished in the 3rd place, reaching one spot for the 2013-14 UEFA Champions League.

Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.

Milan began their pre-season training at Milanello on Monday, 9 July 2012. The Rossoneri played their first set of friendlies in Bari on 21, July, 2012 to contest the TIM Trophy consisting of three games, of 45 minutes each, against rivals Internazionale and Juventus. Milan's first game was against Juventus, they started well but The Old Lady were awarded a penalty after Bakaye Traoré tackled Mirko Vučinić inside the box in the 31st minute, he then converted the spot-kick which subsequently resulted in Milan's first loss. Their second game was against Inter, Il Diavolo would go ahead in the 16th minute through a Stephan El Shaarawy strike, but Nerazzuri would come back to win through a Fredy Guarín header in the 25th minute, and with Rodrigo Palacio scoring the tie-breaker in the 34th minute, forcing Milan to finish last in the competition with two losses.

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