1980 US Open
Date	August 26 – September 7
Edition	100th
Category	Grand Slam (ITF)
Surface	Hardcourt
Location	Flushing Meadows, New York City, United States
Venue	National Tennis Center
Champions
Men's singles
John McEnroe
Women's singles
Chris Evert-Lloyd
Men's doubles
Bob Lutz / Stan Smith
Women's doubles
Billie Jean King / Martina Navratilova
Mixed doubles
Wendy Turnbull / Marty Riessen
Boys' singles
Mike Falberg
Girls' singles
Susan Mascarin
← 1979 · US Open · 1981 →

The 1980 US Open was a tennis tournament played on outdoor hard courts at the USTA National Tennis Center in New York City in New York in the United States. It was the 100th edition of the US Open and was held from August 26 to September 7, 1980.

Seniors

Men's singles

John McEnroe defeated Björn Borg 7–6 ^(7–4), 6–1, 6–7^(5–7), 5–7, 6–4

• It was McEnroe's 2nd career Grand Slam singles title and his 2nd consecutive US Open title.

Women's singles

Chris Evert-Lloyd defeated Hana Mandlíková 5–7, 6–1, 6–1

• It was Evert-Lloyd's 14th career Grand Slam title and her 5th US Open title.

Men's doubles

Bob Lutz / Stan Smith defeated John McEnroe / Peter Fleming 7–6, 3–6, 6–1, 3–6, 6–3

• It was Lutz's 5th and last career Grand Slam title and his 4th US Open title. It was Smith's 7th and last career Grand Slam title and his 5th US Open title.

Women's doubles

Billie Jean King / Martina Navratilova defeated Pam Shriver / Betty Stöve 7–6 ^(7–2), 7–5

• It was King's 39th and last career Grand Slam title and her 13th US Open title. It was Navratilova's 9th career Grand Slam title and her 3rd US Open title.

Mixed doubles

Wendy Turnbull / Marty Riessen defeated Betty Stöve / Frew McMillan 7–5, 6–2

• It was Turnbull's 5th career Grand Slam title and her 2nd US Open title. It was Riessen's 9th and last career Grand Slam title and his 5th US Open title.

Juniors

Boys' singles

Mike Falberg defeated Eric Wilborts 6–7, 6–3, 6–3

Girls' singles

Susan Mascarin defeated Kathrin Keil 6–3, 6–4

Boys' doubles

The tournament began in 1982.

Girls' doubles

The tournament began in 1982.