The 1923 Australian Championships was a tennis tournament that took place on outdoor Grass courts at the Milton Courts, Brisbane, Australia from 11 August to 18 August. It was the 16th edition of the Australian Championships (now known as the Australian Open), the third held in Brisbane, and the second Grand Slam tournament of the year. The singles titles were won by Pat O'Hara Wood and Margaret Molesworth.
See main article: 1923 Australasian Championships – Men's singles. 
Pat O'Hara Wood defeated Bert St John 6–1, 6–1, 6–3
See main article: 1923 Australasian Championships – Women's singles. Margaret Molesworth defeated Esna Boyd 6–1, 7–5
Pat O'Hara Wood / Bert St. John defeated Dudley Bullough / Horace Rice 6–4, 6–3, 3–6, 6–0
Esna Boyd / Sylvia Lance Harper defeated Margaret Molesworth / Mrs. H. Turner 6–1, 6–4
Sylvia Lance Harper / Horace Rice defeated Margaret Molesworth / Bert St. John 2–6, 6–4, 6–4