The 1973 US Open was a tennis tournament that took place on the outdoor grass courts at the West Side Tennis Club in Forest Hills, Queens, in New York City, United States. The tournament ran from 27 August until 9 September. It was the 93rd staging of the US Open, and the fourth Grand Slam tennis event of 1973. It was the first year the boy's championship was held. The 1973 US Open was the first Grand Slam offering equal prize money to both men and women.

Seniors

Men's singles

🇦🇺 John Newcombe defeated Jan Kodeš, 6–4, 1–6, 4–6, 6–2, 6–3

Women's singles

🇦🇺 Margaret Court defeated 🇦🇺 Evonne Goolagong, 7–6, 5–7, 6–2

Men's doubles

🇦🇺 Owen Davidson / 🇦🇺 John Newcombe defeated 🇦🇺 Rod Laver / 🇦🇺 Ken Rosewall, 7–5, 2–6, 7–5, 7–5

Women's doubles

🇦🇺 Margaret Court / 🇬🇧 Virginia Wade defeated 🇺🇸 Rosemary Casals / 🇺🇸 Billie Jean King, 3–6, 6–3, 7–5

Mixed doubles

🇺🇸 Billie Jean King / 🇦🇺 Owen Davidson defeated 🇦🇺 Margaret Court / 🇺🇸 Marty Riessen, 6–3, 3–6, 7–6

Juniors

Boys' singles

🇺🇸 Billy Martin defeated Colin Dowdeswell, 4–6, 6–3, 6–3

Prize money

Total prize money for the event was $227,200.