1918 St. Louis Cardinals season

The 1918 St. Louis Cardinals season was the team's 37th season in St. Louis, Missouri and its 27th season in the National League. The Cardinals went 51–78 during the season and finished eighth in the National League. It was the seventh time in their history they had finished last in the National League. It would be the last time the Cardinals would finish in last place until 1990, when they finished sixth in the National League East.

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