The 2013 World Series was the championship series of Major League Baseball's (MLB) 2013 season. The 109th edition of the World Series, it was a best-of-seven playoff between the American League (AL) champion Boston Red Sox and the National League (NL) champion St. Louis Cardinals; the Red Sox won, 4 games to 2 to win their eighth championship. The Red Sox had home field advantage for the series, based on the AL's win in the 2013 MLB All-Star Game on July 16. This was the first World Series since 1999 to feature both number one seeds from the AL and NL. The Series started on October 23, 2013, ending with Game 6 on October 30, 2013.

The 2013 Boston Red Sox season was the 113th season in the franchise's Major League Baseball history. Under new manager John Farrell, the Red Sox finished first in the American League East with a record of 97 wins and 65 losses. In the postseason, the Red Sox first defeated the AL wild card Tampa Bay Rays in the ALDS. In the ALCS, the Red Sox defeated the American League Central champion Detroit Tigers in six games. Advancing to the World Series, the Red Sox defeated the National League champion St. Louis Cardinals in six games, to capture the franchise's eighth championship overall and third in ten years. The Red Sox became the second team to win the World Series the season after finishing last in their division; the first had been the 1991 Minnesota Twins.