The 1969 World Series was the championship series of Major League Baseball's (MLB) 1969 season. The 66th edition of the World Series, it was a best-of-seven playoff between the American League (AL) champion Baltimore Orioles and the National League (NL) champion New York Mets. The Mets won the series, four games to one, to accomplish one of the greatest upsets in Series history, as that particular Orioles team was considered to be one of the finest ever. The World Series win earned the team the sobriquets "The Amazin' Mets" and "The Miracle Mets". This was the first World Series of MLB's divisional era.

The Mets became the first expansion team to win a division title, a pennant, and the World Series, winning in their eighth year of existence, becoming the fastest expansion team to win a World Series up to that point. Two teams eventually surpassed the latter record, as the Florida Marlins won the 1997 World Series in their fifth year (also becoming the first wild card team to win a World Series) and the Arizona Diamondbacks won the 2001 World Series in their fourth year of play. The 1969 World Series was the first World Series since 1954 to have games played in New York that did not involve the New York Yankees; it was also the first World Series in which neither the New York Giants nor Brooklyn Dodgers (as both teams had moved to California in 1958) represented New York from the NL; all subsequent World Series with a New York- area NL team participating have involved the Mets, who have been the only NL baseball team located in New York City since that era.