1940 St. Louis Cardinals season

The 1940 St. Louis Cardinals season was the team's 59th season in St. Louis, Missouri and 49th season in the National League. The Cardinals went 84–69 during the season and finished third in the National League.

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

Farm system
LEAGUE CHAMPIONS: Houston, Columbus (Sally), Johnson City, Williamson

Arkansas–Missouri League folded, July 1, 1940; Caruthersville club transferred to Batesville, July 7