The 1926 Australasian Championships (now known as the Australian Open) was a tennis tournament that took place on outdoor Grass courts at the Memorial Drive, Adelaide, Australia from 24 January to 30 January. It was the 19th edition of the Australasian Championships, the 3rd held in Adelaide, and the first Grand Slam tournament of the year. The singles titles were won by Australians Jack Hawkes and Daphne Akhurst. 1926 was the last year the tournament would be called "Australasian Championships".
See main article: 1926 Australasian Championships – Men's singles. 
Jack Hawkes defeated Jim Willard 6–1, 6–3, 6–1
See main article: 1926 Australasian Championships – Women's singles. Daphne Akhurst defeated Esna Boyd 6–1, 6–3
See main article: 1926 Australasian Championships – Men's doubles. Jack Hawkes / Gerald Patterson defeated James Anderson / Pat O'Hara Wood 6–1, 6–4, 6–2
See main article: 1926 Australasian Championships – Women's doubles. Esna Boyd / Meryl O'Hara Wood defeated Daphne Akhurst / Marjorie Cox 6–3, 6–8, 8–6
See main article: 1926 Australasian Championships – Mixed doubles. Esna Boyd / Jack Hawkes defeated Daphne Akhurst / Jim Willard 6–2, 6–4