List of champions of the 1907 U.S. National Championships tennis tournament (now known as the US Open). The men's tournament was held from August 20 to August 28 on the outdoor grass courts at the Newport Casino in Newport, Rhode Island. The women's tournament was held from June 25 to July 2 on the outdoor grass courts at the Philadelphia Cricket Club in Philadelphia, Pennsylvania. It was the 27th U.S. National Championships and the third Grand Slam tournament of the three played that year.
See main article: 1907 U.S. National Championships – Men's singles. 
William Larned defeated Robert LeRoy 6–2, 6–2, 6–4
See main article: 1907 U.S. National Championships – Women's singles. Evelyn Sears defeated Carrie Neely 6–3, 6-2
Fred Alexander (USA) / Harold Hackett (USA) defeated Nat Thornton (USA) / Bryan M. Grant (USA) 6–2, 6–1, 6–1
Marie Wimer (USA) / Carrie Neely (USA) defeated Edna Wildey (USA) / Natalie Wildey (USA) 6–1, 2–6, 6–4
May Sayers (USA) / Wallace F. Johnson (USA) defeated Natalie Widley (USA) / Herbert M. Tilden (USA) 6–1, 7–5