| 1990 US Open | |
|---|---|
| Date | August 27 – September 9 |
| Edition | 110th |
| Category | Grand Slam (ITF) |
| Surface | Hardcourt |
| Location | New York City, New York, United States |
| Champions | |
| Men's singles | |
 Pete Sampras | |
| Women's singles | |
 Gabriela Sabatini | |
| Men's doubles | |
 Pieter Aldrich / Danie Visser | |
| Women's doubles | |
| Gigi Fernández / Martina Navratilova | |
| Mixed doubles | |
 Elizabeth Smylie / Todd Woodbridge | |
| Boys' singles | |
 Andrea Gaudenzi | |
| Girls' singles | |
 Magdalena Maleeva | |
| Boys' doubles | |
 Sébastien Leblanc / Greg Rusedski | |
| Girls' doubles | |
| Kristin Godridge / Kirrily Sharpe | |
The 1990 US Open was a tennis tournament played on outdoor hard courts at the USTA National Tennis Center in New York City in the United States. It was the 110th edition of the US Open and was held from August 27 to September 9, 1990.