1900 St. Louis Cardinals season

The 1900 St. Louis Cardinals season was the team's 19th season in St. Louis, Missouri and the ninth season in the National League. The Cardinals went 65–75 during the season and finished fifth in the National League.

Notable transactions

 * May 22, 1900: Jack O'Connor was purchased from the Cardinals by the Pittsburgh Pirates for $2,000.

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