1966 New York Mets season

The 1966 New York Mets season was the fifth regular season for the Mets. They went 66–95 and finished ninth in the National League. They were managed by Wes Westrum. They played home games at Shea Stadium.

1966 marked the first season in which the Mets avoided a last place finish, as well as the first time they did not lose at least 100 games. It was also the first time their record was above .500 at any point of the season, as they stood 2-1 after taking two of three games in the opening series with the Atlanta Braves.

Offseason

 * October 20, 1965: Charley Smith and Al Jackson were traded by the Mets to the St. Louis Cardinals for Ken Boyer.
 * November 29, 1965: Al Luplow was purchased by the Mets from the Cleveland Indians.
 * November 30, 1965: Joe Christopher was traded by the Mets to the Boston Red Sox for Ed Bressoud.
 * January 6, 1966: Gary Kroll was traded by the Mets to the Houston Astros for Johnny Weekly and cash.

Regular season

 * September 11, 1966: Pitcher Pat Jarvis of the Atlanta Braves becomes the first of 5,714 strikeout victims of Nolan Ryan's career.

Notable transactions

 * April 3, 1966: Tom Seaver was signed as an amateur free agent by the Mets.
 * June 4, 1966: Galen Cisco was released by the Mets.
 * June 7, 1966: Duffy Dyer was drafted by the Mets in the 1st round (9th pick) of the 1966 Major League Baseball draft (secondary phase).
 * June 10, 1966: Bob Shaw was purchased by the Mets from the San Francisco Giants.
 * August 6, 1966: Ralph Terry was purchased by the Mets from the Kansas City Athletics.

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''

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: Auburn, Marion