The 2009 Stanley Cup Finals was the championship series of the National Hockey League's (NHL) 2008–09 season, and the culmination of the 2009 Stanley Cup playoffs. It was contested between the Eastern Conference champion Pittsburgh Penguins and the Western Conference champion Detroit Red Wings. It was Detroit's 24th appearance in the Finals and Pittsburgh's fourth appearance in the Finals. This was a rematch of the previous year's Stanley Cup Finals where Detroit had defeated Pittsburgh in six games. This time, Pittsburgh defeated Detroit in seven games to win their third Stanley Cup in franchise history. Pittsburgh's Evgeni Malkin would win the Conn Smythe Trophy as the Most Valuable Player of the 2009 playoffs, becoming the first Russian-born player to win the trophy. Until 2021, this was the last time the finals were played entirely in the Eastern Time Zone.

The 2009 Stanley Cup playoffs of the National Hockey League began on April 15, 2009, after the 2008–09 regular season. The sixteen teams that qualified, eight from each conference, played a best-of-seven series for the conference quarterfinals, semifinals, and championships, and then the conference champions played a best-of-seven series for the Stanley Cup. The Columbus Blue Jackets made their first appearance in the playoffs in their nine-year history. Previously they had been the only franchise never to have made the playoffs. Also, home teams set a record by going 13–2 in the openers of all the series combined. There were no playoff games played in the Province of Ontario as this was the first time that the modern Ottawa Senators and the Toronto Maple Leafs both missed the playoffs in the same year. This was the most recent time that the Carolina Hurricanes were in the playoffs until 2019.