The 1978 Kansas City Royals season was their tenth in Major League Baseball. The Royals won their third consecutive American League West title with a record of 92–70. For the third postseason in a row, Kansas City lost to the New York Yankees, falling 3-1 in the ALCS.

Regular season

Season standings

Record vs. opponents

Notable transactions

Draft picks

Roster

Game log

Regular season

Postseason Game log

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

ALCS

Game 1

October 3: Royals Stadium

Game 2

October 4: Royals Stadium

Game 3

October 6: Yankee Stadium

Game 4

October 7: Yankee Stadium

Farm system

LEAGUE CHAMPIONS: Omaha