The 1978 St. Louis Cardinals season was the team's 97th season in St. Louis, Missouri and its 87th season in the National League. The Cardinals went 69–93 during the season and finished fifth in the National League East, 21 games behind the Philadelphia Phillies.

Offseason

Regular season

In late April, the Cardinals fired manager Vern Rapp, who had started at 7-11. He was briefly replaced by coach Jack Krol for two games (1-1) before giving the job on a permanent basis to their former MVP third-baseman Ken Boyer, who went 61-81 the rest of the way. On June 16, Tom Seaver of the Cincinnati Reds made history by pitching a no-hitter against the Cardinals. It would be the only no-hitter of his career. First baseman Keith Hernandez won a Gold Glove. This remains to date the only 162-game season in which the Cardinals failed to win at least 70 games.

Season standings

Record vs. opponents

Opening Day starters

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

League leaders

Farm system