The Milwaukee Brewers' 2011 season was their 42nd season for the franchise in Milwaukee, the 14th in the National League, and 43rd overall. The Brewers posted a franchise-best record of 96–66, winning their first-ever National League Central Division title. The Brewers defeated the Arizona Diamondbacks in five games in the first round of the playoffs and advanced to the National League Championship Series, where they lost in six games to the St. Louis Cardinals.