The 1927 Australian Championships was a tennis tournament that took place on outdoor Grass courts at the Kooyong Stadium in Melbourne, Australia from 22 January to 1 February. It was the 20th edition of the Australian Championships (now known as the Australian Open), the 5th held in Melbourne, and the first Grand Slam tournament of the year. Australians Gerald Patterson and Esna Boyd won the singles titles.
See main article: 1927 Australian Championships – Men's singles. 
Gerald Patterson defeated Jack Hawkes 3–6, 6–4, 3–6, 18–16, 6–3
See main article: 1927 Australian Championships – Women's singles. Esna Boyd defeated Sylvia Lance Harper 5–7, 6–1, 6–2
See main article: 1927 Australian Championships – Men's doubles. Jack Hawkes / Gerald Patterson defeated Ian McInness / Pat O'Hara Wood 8–6, 6–1, 6–2
See main article: 1927 Australian Championships – Women's doubles. Louie Bickerton / Meryl O'Hara Wood defeated Esna Boyd / Sylvia Lance Harper 6–3, 6–3
See main article: 1927 Australian Championships – Mixed doubles. Esna Boyd / Jack Hawkes defeated Youtha Anthony / Jim Willard 6–1, 6–3