2011 New York Yankees season

The 2011 New York Yankees season was the 109th season for the New York Yankees franchise. The Yankees began the season at home against the Detroit Tigers on Thursday, March 31. The Yankees clinched a playoff berth in the first game of a doubleheader on September 21, and clinched the American League East title in the second game. The Yankees season ended on October 6 when they lost a deciding Game 5 of the 2011 American League Division Series to the Detroit Tigers 3–2. It was the first time since 2007 that the Yankees lost an elimination game at home.

The 2011 season was the final season in the playing career of longtime Yankees catcher Jorge Posada.