The 1934 Australian Championships was a tennis tournament that took place on outdoor Grass courts at the White City Tennis Club, Sydney, Australia from 18 January to 27 January. It was the 27th edition of the Australian Championships (now known as the Australian Open), the 7th held in Sydney, and the first Grand Slam tournament of the year. The singles titles were won by Briton Fred Perry and Australian Joan Hartigan.

Fred Perry defeated Jack Crawford 6–3, 7–5, 6–1

Joan Hartigan defeated Mall Molesworth 6–1, 6–4

Pat Hughes / Fred Perry defeated Adrian Quist / Don Turnbull 6–8, 6–3, 6–4, 3–6, 6–3

Mall Molesworth / Emily Hood Westacott defeated Joan Hartigan / Ula Valkenburg 6–8, 6–4, 6–4

Joan Hartigan / Edgar Moon defeated Emily Hood Westacott / Roy Dunlop 6–3, 6–4

• Australian Open official website