|Full name||Watson McLean Washburn|
|Country (sports)||United States|
June 13, 1894|
New York, NY, USA
|Died||December 2, 1973
New York, NY, USA
|Turned pro||1910 (amateur tour|
|Plays||Right-handed (one-handed backhand)|
|Int. Tennis HoF||1965 (member page)|
|Highest ranking||No. 5 (U.S. ranking)|
|Grand Slam Singles results|
|US Open||QF (1911, 1912, 1913, 1916, 1920)|
|Grand Slam Doubles results|
|US Open||F (1921, 1923)|
|Other doubles tournaments|
|Davis Cup||W (1921)|
Watson McLean Washburn (June 13, 1894 – December 2, 1973) was an American tennis player who was in the top 10 in the US seven times between 1914 and 1922. He was also one of the founders of the International Tennis Hall of Fame, to which he was inducted in 1965.
Born in New York City, he was primarily a doubles player and teamed with Richard Norris Williams to take the Davis Cup in 1921. Also with Williams, he reached two US Championship finals and one at Wimbledon. He won the US Intercollegiate Doubles Championship in 1913 and the Indoor Doubles Championship in 1915. In July 1915 Washburn and Williams won the doubles title at the Eastern Tennis Championship in Brookline defeating Irving C. Wright and Wallace F. Johnson in four sets.
After his tennis career he became an Assistant State Prosecutor.
Grand Slam finals
Doubles (3 runners-up)
|Outcome||Year||Championship||Partner||Opponents in final||Score in final|
|Runner-up||1921||U.S. National Championships||Richard Norris Williams|| Vincent Richards
|11–13, 10–12, 1–6|
|Runner-up||1923||U.S. National Championships||Richard Norris Williams|| Brian Norton
|6–3, 2–6, 3–6, 7–5, 2–6|
|Runner-up||1924||Wimbledon||Richard Norris Williams|| Frank Hunter
|3–6, 6–3, 10–8, 6–8, 3–6|
- "Eastern Tennis Championship". The New York Times. August 1, 1915. Retrieved July 11, 2012.
- "Watson Washburn Writes of Flourishing Tennis Prospects in European Lands". Washington Daily News. January 21, 1919. Retrieved July 11, 2012.
- Paul B. Williams (1921). United States Lawn Tennis Association and the World War. Robert Hamilton Company. p. 2.
- "Washburn Victor in Tennis Final" (PDF). The New York Times. August 7, 1921. Retrieved September 10, 2012.
- "Watson Washburn, Tennis Star On Davis Cup Team in '20's, Dies". The New York Times. December 3, 1973. Retrieved July 11, 2012.