The 1942 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 27 until September 7. It was the 62nd staging of the U.S. National Championships and due to World War II it was the only Grand Slam tennis event of the year.

Finals

Men's singles

🇺🇸 Ted Schroeder defeated 🇺🇸 Frank Parker 8–6, 7–5, 3–6, 4–6, 6–2

Women's singles

🇺🇸 Pauline Betz defeated 🇺🇸 Louise Brough 4–6, 6–1, 6–4

Men's doubles

🇺🇸 Gardnar Mulloy / 🇺🇸 Bill Talbert defeated 🇺🇸 Ted Schroeder / 🇺🇸 Sidney Wood 9–7, 7–5, 6–1

Women's doubles

🇺🇸 Louise Brough / 🇺🇸 Margaret Osborne defeated 🇺🇸 Pauline Betz / 🇺🇸 Doris Hart 2–6, 7–5, 6–0

Mixed doubles

🇺🇸 Louise Brough / 🇺🇸 Ted Schroeder defeated 🇺🇸 Patricia Todd / 🇦🇷 Alejo Russell 3–6, 6–1, 6–4