The 1951 Australian Championships was a tennis tournament that took place on outdoor Grass courts at the White City Tennis Club, Sydney, Australia from 20 January to 31 January. It was the 39th edition of the Australian Championships (now known as the Australian Open), the 11th held in Sydney, and the first Grand Slam tournament of the year. The singles titles were won by American Dick Savitt and Australian Nancye Wynne Bolton.
See main article: 1951 Australian Championships – Men's singles. 
Dick Savitt defeated 
Ken McGregor 6–3, 2–6, 6–3, 6–1
See main article: 1951 Australian Championships – Women's singles. Nancye Wynne Bolton defeated Thelma Coyne Long 6–1, 7–5
Ken McGregor / Frank Sedgman defeated John Bromwich / Adrian Quist 11–9, 2–6, 6–3, 4–6, 6–3 [1]
Thelma Coyne Long / Nancye Wynne Bolton defeated Joyce Fitch / Mary Bevis Hawton 6–2, 6–1 [2]
Thelma Coyne Long / George Worthington defeated Clare Proctor / Jack May 6–4, 6–3 [3]