| 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 | |
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.