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.
See main article: 1934 Australian Championships – Men's singles. Fred Perry defeated 
Jack Crawford 6–3, 7–5, 6–1
See main article: 1934 Australian Championships – Women's singles. Joan Hartigan defeated Mall Molesworth 6–1, 6–4
See main article: 1934 Australian Championships – Men's doubles. 
Pat Hughes / Fred Perry defeated Adrian Quist / Don Turnbull 6–8, 6–3, 6–4, 3–6, 6–3
See main article: 1934 Australian Championships – Women's doubles. Mall Molesworth / Emily Hood Westacott defeated Joan Hartigan / Ula Valkenburg 6–8, 6–4, 6–4
See main article: 1934 Australian Championships – Mixed doubles. Joan Hartigan / Edgar Moon defeated Emily Hood Westacott / Roy Dunlop 6–3, 6–4