The 2012 Stanley Cup playoffs was the playoff tournament of the National Hockey League (NHL) for the 2011–12 season. It began on April 11, 2012, after the conclusion of the regular season, and ended on June 11, with the Los Angeles Kings defeating the New Jersey Devils in six games in the Stanley Cup Finals to win their first Stanley Cup championship. Kings goaltender Jonathan Quick, having recorded a 1.41 goals against average, was named the Conn Smythe Trophy winner as the playoffs' most valuable player.

The National Hockey League (NHL) conference finals are the Eastern Conference and Western Conference championship series of the NHL. The conference finals are each a best-of-seven series, and comprise the third round of the Stanley Cup playoffs. The two series are played in mid-to-late May. The winners of the Eastern and Western Conference finals receive the Prince of Wales Trophy and Clarence S. Campbell Bowl, respectively, and advance to face each other in the Stanley Cup Finals.