1958 U.S. National Championships (tennis)
# 1958 U.S. National Championships (tennis)

The 1958 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 29 August until 7 September. It was the 78th staging of the U.S. National Championships, and the fourth Grand Slam tennis event of the year.

## Finals

### Men's singles

Ashley Cooper defeated Malcolm Anderson 6–2, 3–6, 4–6, 10–8, 8–6

### Women's singles

Althea Gibson defeated Darlene Hard 3–6, 6–1, 6–2

### Men's doubles

Alex Olmedo (USA) / Ham Richardson (USA) defeated Sam Giammalva (USA) / Barry MacKay (USA) 3–6, 6–3, 6–4, 6–4

### Women's doubles

Jeanne Arth (USA) / Darlene Hard (USA) defeated Althea Gibson (USA) / Maria Bueno (BRA) 2–6, 6–3, 6–4

### Mixed doubles

Margaret Osborne (USA) / Neale Fraser (AUS) defeated Maria Bueno (BRA) / Alex Olmedo (USA) 6–4, 3–6, 9–7

