| 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 | |
| Women's singles | |
| Men's doubles | |
| Women's doubles | |
| Mixed doubles | |
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
 John Doeg defeated 
 Frank Shields  10–8, 1–6, 6–4, 16–14
Women's singles
 Betty Nuthall defeated 
 Anna McCune Harper  6–1, 6–4
Men's doubles
 George Lott / 
 John Doeg defeated 
 Wilmer Allison / 
 John Van Ryn 8–6, 6–3, 4–6, 13–15, 6–4 [2]
Women's doubles
 Betty Nuthall / 
 Sarah Palfrey defeated 
 Edith Cross / 
 Anna McCune Harper 3–6, 6–3, 7–5 [3]
Mixed doubles
 Edith Cross / 
 Wilmer Allison defeated 
 Marjorie Morrill / 
 Frank Shields 6–4, 6–4 [4]