1956 Washington Senators season

The 1956 Washington Senators won 59 games, lost 95, and finished in seventh place in the American League. They were managed by Chuck Dressen and played home games at Griffith Stadium, where they attracted 431,647 spectators, eighth and last in AL attendance.

Offseason

 * November 8, 1955: Mickey Vernon, Bob Porterfield, Johnny Schmitz, and Tom Umphlett were traded by the Senators to the Boston Red Sox for Karl Olson, Dick Brodowski, Tex Clevenger, Neil Chrisley, and Al Curtis (minors).
 * February 8, 1956: Mickey McDermott and Bobby Kline were traded by the Senators to the New York Yankees for Lou Berberet, Bob Wiesler, Herb Plews, Dick Tettelbach, and a player to be named later. The Yankees completed the deal by sending Whitey Herzog to the Senators on April 2.

Regular season

 * April 18, 1956: Umpire Ed Rommell was the first umpire to wear glasses in a major league game. The game was played between the Senators and the New York Yankees.

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 CO-CHAMPIONS: Thibodaux