The 1912 U.S. National Championships (now known as the US Open) took place on the outdoor grass courts at the Newport Casino in Newport, United States. The men's singles tournament ran from August 19 until August 26 while the women's singles and doubles championship took place from June 10 to June 15 at the Philadelphia Cricket Club in Chestnut Hill. It was the 32nd staging of the U.S. National Championships, and the second Grand Slam tennis event of the year. The challenge round was abolished in this edition, thus requiring all participants, including the defending champion, to play the main draw.
| 1912 U.S. National Championships | |
|---|---|
| Date | August 19–26 (M) June 10–15 (W) |
| Edition | 32nd |
| Category | Grand Slam |
| Surface | Grass (outdoor) |
| Location | Newport, R.I., United States (M) Philadelphia, PA, United States (W) |
| Venue | Newport Casino (M) Philadelphia Cricket Club (W) |
| Champions | |
| Men's singles | |
 Maurice McLoughlin[1] | |
| Women's singles | |
| Mary Browne[1] | |
| Men's doubles | |
| Maurice McLoughlin / Tom Bundy[2] | |
| Women's doubles | |
| Dorothy Green / Mary Browne[3] | |
| Mixed doubles | |
| Mary Browne / R. Norris Williams[4] | |
Finals
editMen's singles
edit Maurice McLoughlin defeated Wallace F. Johnson 3–6, 2–6, 6–2, 6–4, 6–2
Women's singles
edit Mary Browne defeated Eleonora Sears 6–4, 6–2
Men's doubles
edit
Maurice McLoughlin / Tom Bundy defeated Raymond Little / Gustave F. Touchard 3–6, 6–2, 6–1, 7–5
Women's doubles
edit Mary Browne / Dorothy Greene defeated Maud Barger-Wallach / Mrs. Frederick Schmitz 6–2, 5–7, 6–0
Mixed doubles
edit Mary Browne / R. Norris Williams defeated Eleonora Sears / William Clothier 6–4, 2–6, 11–9