1980 US Open (tennis)
| 1980 US Open | |
|---|---|
| Date | 26 August – 7 September |
| Edition | 100th |
| Category | Grand Slam (ITF) |
| Surface | Hardcourt |
| Location | Flushing Meadows, New York, 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 | |
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 7–5, 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.