| 1890 U.S. National Championships | |
|---|---|
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| Date | August 18–27 (M) June 10–13 (W) |
| Edition | 10th |
| Category | Grand Slam |
| Surface | Grass |
| Location | Newport, R.I., United States (M) Philadelphia, PA, United States (W) |
| Champions | |
| Men's singles | |
 Oliver Campbell[1] | |
| Women's singles | |
| Ellen Roosevelt[1] | |
| Men's doubles | |
| Valentine Hall / Oliver Campbell | |
| Women's doubles | |
| Grace Roosevelt / Ellen Roosevelt | |
List of champions of the 1890 U.S. National Championships (now known as the US Open). The men's singles and doubles competitions were held from August 18 to August 27 on the outdoor grass courts at the Newport Casino in Newport, Rhode Island. The women's singles and doubles competitions were held from June 10 to June 13 on the outdoor grass courts at the Philadelphia Cricket Club in Philadelphia, Pennsylvania. It was the 10th U.S. National Championships and the second Grand Slam tournament of the year.[2]
- ^ a b Bud Collins (2010). The Bud Collins History of Tennis (2nd ed.). New York: New Chapter Press. pp. 454–483. ISBN 978-0942257700.
- ^ Hall, Valentine G., ed. (1891). "Wright & Ditson's Lawn Tennis Guide for 1891". Wright and Ditson's Official Lawn Tennis Guide1891-1940. Boston: Wright & Ditson: 51–70 – via HathiTrust.