The 1971 Montreal Expos season was the third season in the history of the franchise. The Expos finished in fifth place in the National League East with a record of 71–90, 25 1/2 games behind the Pittsburgh Pirates.

Offseason

Spring training

The Expos held spring training at West Palm Beach Municipal Stadium in West Palm Beach, Florida, a facility they shared with the Atlanta Braves. It was their third season at the stadium.

Regular season

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

Award winners

1971 Major League Baseball All-Star Game

Farm system