The 2009 Minnesota Twins season was the 49th season for the franchise in Minnesota, and the 109th overall in the American League. It was their final season at the Hubert H. Humphrey Metrodome with their new stadium, Target Field, opening in 2010. They ended the regular season as American League Central champions after defeating the Detroit Tigers in a one game tie-breaker. They were then swept in the ALDS by the New York Yankees. The team's star catcher and Minnesota native Joe Mauer won the American League Most Valuable Player Award.

The Hubert H. Humphrey Metrodome was a domed sports stadium located in downtown Minneapolis, Minnesota. It opened in 1982 as a replacement for Metropolitan Stadium, the former home of the National Football League's (NFL) Minnesota Vikings and Major League Baseball's (MLB) Minnesota Twins, and Memorial Stadium, the former home of the Minnesota Golden Gophers football team.