The 1939 Washington Senators won 65 games, lost 87, and finished in sixth place in the American League. They were managed by Bucky Harris and played home games at Griffith Stadium.

Offseason

* December 29, 1938: Al Simmons was purchased from the Senators by the Boston Bees for $3,000.Al Simmons page at Baseball Reference
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Regular season

''Note: Pos = Position; G = Games played; AB = At bats; H = Hits; Avg. = Batting average; HR = Home runs; RBI = Runs batted in''

''Note: G = Games played; AB = At bats; H = Hits; Avg. = Batting average; HR = Home runs; RBI = Runs batted in''

''Note: G = Games pitched; IP = Innings pitched; W = Wins; L = Losses; ERA = Earned run average; SO = Strikeouts''

''Note: G = Games pitched; IP = Innings pitched; W = Wins; L = Losses; ERA = Earned run average; SO = Strikeouts''

''Note: G = Games pitched; W = Wins; L = Losses; SV = Saves; ERA = Earned run average; SO = Strikeouts''