The 2002 National League Championship Series (CS) was a Major League Baseball playoff series played from October 9 to October 14 to determine the champion of the National League, between the Central Division champion St. Louis Cardinals and the wild-card qualifying San Francisco Giants. It was a rematch of the 1987 CS, in which the Cardinals defeated the Giants in seven games. The Cardinals, by virtue of being a division winner, had the home field advantage.
The two teams were victorious in the Division Series (DS), with the Cardinals defeating the West Division champion Arizona Diamondbacks three games to none, and the Giants defeating the East Division champion and heavily favored Atlanta Braves three games to two.
The Giants won the series in five games but were defeated by the Anaheim Angels in seven games in the World Series.