1981 US Open
Date	September 1–13
Edition	101st
Category	Grand Slam (ITF)
Surface	Hardcourt
Location	New York City, United States
Champions
Men's singles
John McEnroe
Women's singles
Tracy Austin
Men's doubles
Peter Fleming / John McEnroe
Women's doubles
Kathy Jordan / Anne Smith
Mixed doubles
Anne Smith / Kevin Curren
Boys' singles
Thomas Högstedt
Girls' singles
Zina Garrison
← 1980 · US Open · 1982 →

The 1981 US Open was a tennis tournament played on outdoor hard courts at the USTA National Tennis Center in New York City, United States. It was the 101st edition of the US Open and was held from September 1 to September 13, 1981.

Seniors

Men's singles

John McEnroe defeated Björn Borg 4–6, 6–2, 6–4, 6–3

• It was McEnroe's 4th career Grand Slam title and his 3rd US Open title.

Women's singles

Tracy Austin defeated Martina Navratilova 1–6, 7–6^(7–4), 7–6^(7–1)

• It was Austin's 2nd and last career Grand Slam title and her 2nd US Open title.

Men's doubles

Peter Fleming / John McEnroe defeated Heinz Günthardt / Peter McNamara by walkover

• It was Fleming's 4th career Grand Slam title and his 2nd US Open title. It was McEnroe's 9th career Grand Slam title and his 4th US Open title.

Women's doubles

Kathy Jordan / Anne Smith defeated Rosemary Casals / Wendy Turnbull 6–3, 6–3

• It was Jordan's 3rd career Grand Slam title and her only US Open title. It was Smith's 4th career Grand Slam title and her 1st US Open title.

Mixed doubles

Anne Smith / Kevin Curren defeated JoAnne Russell / Steve Denton 6–4, 7–6^(7–4)

• It was Smith's 5th career Grand Slam title and her 2nd US Open title. It was Curren's 1st career Grand Slam title and his 1st US Open title.

Juniors

Boys' singles

Thomas Högstedt defeated Hans Schwaier 7–5, 6–3

Girls' singles

Zina Garrison defeated Kate Gompert 6–0, 6–3