1912 St. Louis Cardinals season

The 1912 St. Louis Cardinals season was the team's 31st season in St. Louis, Missouri and its 21st season in the National League. The Cardinals went 63–90 during the season and finished sixth out of eight teams in the National League.

Notable transactions

 * September 16, 1912: Jimmy Whelan was drafted by the Cardinals from the Ogden Canners in the 1912 rule 5 draft.

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

Relief pitchers
Note: G = Games pitched; W = Wins; L = Losses; SV = Saves; ERA = Earned run average; SO = Strikeouts