1906 St. Louis Cardinals season

The 1906 St. Louis Cardinals season was the team's 25th season in St. Louis, Missouri and the 15th season in the National League. The Cardinals went 52–98 during the season and finished seventh in the National League.

Notable transactions

 * July 13, 1906: Spike Shannon was traded by the Cardinals to the New York Giants for Doc Marshall and Sam Mertes.

Starters by position
''Note: Pos = Position; G = Games played; AB = At bats; H = Hits; Avg. = Batting average; HR = Home runs; RBI = Runs batted in''

Other batters
''Note: G = Games played; AB = At bats; H = Hits; Avg. = Batting average; HR = Home runs; RBI = Runs batted in''

Starting pitchers
Note: G = Games pitched; IP = Innings pitched; W = Wins; L = Losses; ERA = Earned run average; SO = Strikeouts

Other pitchers
Note: G = Games pitched; IP = Innings pitched; W = Wins; L = Losses; ERA = Earned run average; SO = Strikeouts