The 1978 Chicago Cubs season was the 107th season of the Chicago Cubs franchise, the 103rd in the National League and the 63rd at Wrigley Field. The Cubs finished third in the National League East with a record of 79–83.

Offseason

Regular season

On June 14, in Cincinnati, Pete Rose of the Cincinnati Reds singled in the first inning off Cubs pitcher Dave Roberts; Rose would proceed to get a hit in every game he played until August 1.

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

Farm system

LEAGUE CHAMPIONS: Geneva