The 1975 Australian Open was a tennis tournament played on outdoor grass courts at the Kooyong Lawn Tennis Club in Melbourne in Australia and was held from 21 December 1974 to 1 January 1975. It was the 63rd edition of the Australian Open and the first Grand Slam tournament of the year. The singles titles were won by Australians John Newcombe and Evonne Goolagong.

Seniors

Men's singles

🇦🇺 John Newcombe defeated 🇺🇸 Jimmy Connors, 7–5, 3–6, 6–4, 7–6(9–7)

Women's singles

🇦🇺 Evonne Goolagong defeated Martina Navratilova, 6–3, 6–2

Men's doubles

🇦🇺 John Alexander / 🇦🇺 Philip Dent defeated 🇦🇺 Bob Carmichael / 🇦🇺 Allan Stone, 6–3, 7–6

Women's doubles

🇦🇺 Evonne Goolagong / 🇺🇸 Peggy Michel defeated Olga Morozova / 🇦🇺 Margaret Court, 7–6, 7–6

Mixed doubles