| 1930 U.S. National Championships | |
|---|---|
| Date | September 6–13 (M) August 18–23 (W) | 
| Edition | 50th | 
| Category | Grand Slam (ITF) | 
| Surface | Grass / Outdoor | 
| Location | Forest Hills, Queens New York City, United States | 
| Venue | West Side Tennis Club | 
| Champions | |
| Men's singles | |
| .svg.png.webp) John Doeg | |
| Women's singles | |
|  Betty Nuthall | |
| Men's doubles | |
| .svg.png.webp) George Lott / .svg.png.webp) John Doeg | |
| Women's doubles | |
|  Betty Nuthall / .svg.png.webp) Sarah Palfrey | |
| Mixed doubles | |
| .svg.png.webp) Edith Cross / .svg.png.webp) Wilmer Allison | |
The 1930 U.S. National Championships (now known as the US Open) was a tennis tournament that took place on the outdoor grass courts at the West Side Tennis Club, Forest Hills in New York City, United States. The tournament ran from August 28 until September 13. It was the 50th staging of the U.S. National Championships and the fourth Grand Slam tennis event of the year.[1]
Finals
Men's singles
.svg.png.webp) John Doeg defeated
 John Doeg defeated .svg.png.webp) Frank Shields  10–8, 1–6, 6–4, 16–14
 Frank Shields  10–8, 1–6, 6–4, 16–14
Women's singles
 Betty Nuthall defeated
 Betty Nuthall defeated .svg.png.webp) Anna McCune Harper  6–1, 6–4
 Anna McCune Harper  6–1, 6–4
Men's doubles
.svg.png.webp) George Lott /
 George Lott / .svg.png.webp) John Doeg defeated
 John Doeg defeated  Wilmer Allison /
 Wilmer Allison /  John Van Ryn 8–6, 6–3, 4–6, 13–15, 6–4 [2]
 John Van Ryn 8–6, 6–3, 4–6, 13–15, 6–4 [2]
Women's doubles
 Betty Nuthall /
 Betty Nuthall / .svg.png.webp) Sarah Palfrey defeated
 Sarah Palfrey defeated  Edith Cross /
 Edith Cross /  Anna McCune Harper 3–6, 6–3, 7–5 [3]
 Anna McCune Harper 3–6, 6–3, 7–5 [3]
Mixed doubles
.svg.png.webp) Edith Cross /
 Edith Cross / .svg.png.webp) Wilmer Allison defeated
 Wilmer Allison defeated  Marjorie Morrill /
 Marjorie Morrill /  Frank Shields 6–4, 6–4 [4]
 Frank Shields 6–4, 6–4 [4]