Second-seeded Beryl Penrose defeated Thelma Long 6–4, 6–3 in the final to win the women's singles tennis title at the 1955 Australian Championships.
The seeded players are listed below. Beryl Penrose is the champion; others show the round in which they were eliminated.
Thelma Long (finalist) Beryl Penrose (champion) Jenny Staley (semifinals) Mary Carter (semifinals) Fay Muller (quarterfinals) Daphne Seeney (second round) Loris Nichols (second round) Norma Ellis (quarterfinals)