The 1966 St. Louis Cardinals season was the team's 85th season in St. Louis, Missouri and its 75th season in the National League. The Cardinals went 83–79 during the season and finished sixth in the National League, 12 games behind the Los Angeles Dodgers.

Offseason

Regular season

This season marked the final time the Cardinals played in Sportsman's Park/Busch Stadium I, as they played their final home game at that ballpark on May 8, losing to the San Francisco Giants, 10–5. Busch sought to replace the increasingly inadequate Busch Stadium (formerly Sportsman's Park) with a modern facility in a better location. The result was a new multi-purpose, $25 million concrete stadium, also named for Busch's father – Busch Memorial Stadium, also known as Busch II. The Cardinals moved into Busch II four days later, and defeated the Atlanta Braves, 4–3 in 12 innings. On July 12, the Cardinals hosted the 1966 Major League Baseball All-Star Game at their new stadium, in 105 degree heat and humidity, with the NL defeating the AL, 2–1 in ten innings. Busch Memorial Stadium was where the Cardinals would play baseball until the end of 2005. Later derided as a facsimile of the bland, cookie-cutter "multi-purpose stadia" built in multiple locations of the United States during the 1960s and 1970s, Busch Memorial achieved a measure of popularity among St. Louis fans in a way that its cousins in Philadelphia, Atlanta, Pittsburgh, and Cincinnati did not, perhaps due in part to the success of the teams which played there, and perhaps also due to the distinctive roof arches added by architect Edward Durrell Stone — unique touches meant to echo the city's new iconic monument (completed at nearly the same time), the Gateway Arch. Pitcher Bob Gibson and outfielder Curt Flood won Gold Gloves this year.

Season standings

Record vs. opponents

Notable transactions

Roster

Player stats

Batting

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''

Pitching

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

Awards and records

Farm system

Eugene affiliation shared with Philadelphia Phillies