The 1925 Australasian Championships was a tennis tournament that took place on outdoor Grass courts at the White City Tennis Club, Sydney, Australia from 24 January to 31 January. It was the 18th edition of the Australian Championships (now known as the Australian Open), the 4th held in Sydney, and the first Grand Slam tournament of the year. The singles titles were won by Australians James Anderson and Daphne Akhurst.
| 1925 Australasian Championships | |
|---|---|
| Date | 24–30 January 1925 |
| Edition | 18th |
| Category | Grand Slam (ITF) |
| Surface | Grass |
| Location | Sydney, Australia |
| Venue | White City Tennis Club |
| Champions | |
| Men's singles | |
 James Anderson | |
| Women's singles | |
| Daphne Akhurst | |
| Men's doubles | |
| Pat O'Hara Wood / Gerald Patterson | |
| Women's doubles | |
| Daphne Akhurst / Sylvia Harper | |
| Mixed doubles | |
| Daphne Akhurst / Jim Willard | |
| Boys' singles | |
| Alan Coldham | |
| Boys' doubles | |
| Jack Crawford / Harry Hopman | |
Finals
editMen's singles
edit James Anderson defeated
Gerald Patterson 11–9, 2–6, 6–2, 6–3
Women's singles
edit Daphne Akhurst defeated
Esna Boyd 1–6, 8–6, 6–4
Men's doubles
edit Pat O'Hara Wood /
Gerald Patterson defeated
James Anderson /
Fred Kalms 6–4, 9–7, 7–5
Women's doubles
edit Daphne Akhurst /
Sylvia Harper defeated
Esna Boyd /
Kathleen Le Messurier 6–4, 6–3
Mixed doubles
edit Daphne Akhurst /
Jim Willard defeated
Sylvia Harper /
Bob Schlesinger 6–4, 6–4