The 1970 Montreal Expos season was the second season in the history of the franchise. The Expos finished in last place in the National League East with a record of 73–89, 16 games behind the Pittsburgh Pirates. The Expos won 21 more games than in their inaugural season in 1969.

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 second season at the stadium.

Regular season

Season standings

Record vs. opponents

Opening Day starters

Notable transactions

Draft picks

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 honors

Farm system

Buffalo franchise moved to Winnipeg and renamed, June 11, 1970; Jacksonville affiliation shared with Milwaukee Brewers