1966 U.S. National Championships (tennis)
# 1966 U.S. National Championships (tennis)

The 1966 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 1 September until 11 September. It was the 86th staging of the U.S. National Championships, and the fourth Grand Slam tennis event of 1966.

## Finals

### Men's singles

Fred Stolle defeated John Newcombe 4–6, 12–10, 6–3, 6–4

### Women's singles

Maria Bueno defeated Nancy Richey 6–3, 6–1

### Men's doubles

Roy Emerson / Fred Stolle defeated Clark Graebner / Dennis Ralston 6–4, 6–4, 6–4

### Women's doubles

Maria Bueno / Nancy Richey defeated Rosie Casals / Billie Jean King 6–3, 6–4

### Mixed doubles

Donna Floyd-Fales / Owen Davidson defeated Carol Hanks Aucamp / Ed Rubinoff 6–1, 6–3

