First-seeded Angela Mortimer defeated Lorraine Coghlan 6–3, 6–4 in the final to win the women's singles tennis title at the 1958 Australian Championships.
The seeded players are listed below. Angela Mortimer is the champion; others show the round in which they were eliminated.
Angela Mortimer (champion)
Lorraine Coghlan (finalist) Mary Carter (semifinals) Mary Hawton (quarterfinals) Daphne Fancutt (first round) Maureen McCalman (second round) Thelma Long (second round) Fay Muller (quarterfinals)