Mary Sawyer (born 11 June 1957) is a former professional tennis player from Australia.

Previously twice a quarterfinalist, she began the tournament with a first round upset over top-seeded Virginia Ruzici.

[2] This was the first occasion that a number one seed had been beaten in the opening round of the women's singles at a Grand Slam.

[3] She then defeated Naoko Sato and seventh-seeded Janet Newberry, then lost in the semifinals to Sharon Walsh.

[4] After the 1979 Australian Open, Sawyer took a break from tennis, which she had planned before her tournament run.