The 1987 World Series was the championship series of Major League Baseball's (MLB) 1987 season. The 84th edition of the World Series, it was a best-of-seven playoff played between the American League (AL) champion Minnesota Twins and the National League (NL) champion St. Louis Cardinals. The Twins defeated the Cardinals four games to three to win the Series, their first in Minnesota and the first since last winning as the Washington Senators in 1924. Twins pitcher Frank Viola was named as the 1987 World Series MVP.

The World Series is the annual final championship series of Major League Baseball (MLB) in the United States and Canada. It has traditionally been held in October, though some more recent editions were contested in November due to expanded playoffs and/or season delays. It has been contested since 1903 between the champion teams of the American League (AL) and the National League (NL). The winner of the World Series championship is determined through a best-of-seven playoff, and the winning team is awarded the Commissioner's Trophy.