The 2011–12 Oklahoma City Thunder season was the 4th season of the franchise's existence in Oklahoma City as a member of the National Basketball Association (NBA).

The Thunder continued to build on recent success in previous years by making the NBA Playoffs, first defeating and sweeping the defending NBA champions, the Dallas Mavericks, in four games in the First Round, then defeated the Los Angeles Lakers in five games in the Semifinals, and finally, defeated the San Antonio Spurs in six games in the Western Conference Finals to advance to the NBA Finals for the first time since 1996, when the club was based in Seattle.

In the NBA Finals, the Thunder faced off against the Big Three-led Miami Heat, who made an appearance in the previous NBA Finals, but lost to the Dallas Mavericks in six games. Despite winning Game 1 in the NBA Finals, the Thunder would then go on to lose the next four games and the NBA Finals against the Heat.

Other season highlights included forward Kevin Durant's third consecutive NBA scoring title, and Durant being named the MVP of the All-Star Game.