1956 St. Louis Cardinals season

The 1956 St. Louis Cardinals season was the team's 75th season in St. Louis, Missouri, and its 65th season in the National League. The Cardinals went 76–78 during the season and finished fourth in the National League.

Offseason

 * October 20, 1955: Harry Walker was released by the Cardinals.
 * November 27, 1955: Ed Mayer was drafted by the Cardinals from the Boston Red Sox in the 1955 minor league draft.
 * November 27, 1955: Billy Muffett was drafted by the Cardinals from the Chicago Cubs in the 1955 rule 5 draft.
 * January 31, 1956: Brooks Lawrence and Sonny Senerchia were traded by the Cardinals to the Cincinnati Redlegs for Jackie Collum.
 * March 30, 1956: Pete Whisenant was traded by the Cardinals to the Chicago Cubs for Hank Sauer.

Notable transactions

 * May 14, 1956: Solly Hemus was traded by the Cardinals to the Philadelphia Phillies for Bobby Morgan.
 * May 17, 1956: Bill Virdon was traded by the Cardinals to the Pittsburgh Pirates for Dick Littlefield and Bobby Del Greco.
 * May 28, 1956: The Cardinals traded cash and a player to be named later to the Pittsburgh Pirates for Toby Atwell. The Cardinals completed the deal by sending Dick Rand to the Pirates on October 14.
 * June 14, 1956: Red Schoendienst, Jackie Brandt, Dick Littlefield, Bill Sarni, and a player to be named later were traded by the Cardinals to the New York Giants for Alvin Dark, Ray Katt, Don Liddle, and Whitey Lockman. The Cardinals completed the deal by sending Gordon Jones to the Giants on October 1.

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: Rochester, Houston, Fresno