Her career spanned the end of the 1940s and the 1950s.
Hawton won the women's doubles title at the Australian Championships five times.
In 1958 she also won the mixed doubles title together with compatriot Robert Howe.In 1948, she married Keith Ernest Hawton.She was captain of the Australian Fed Cup team in 1979 and 1980 and director of the NSW Tennis Association.
In 1979 Hawton published a book titles How to Play Winning Tennis.
She died on 18 January 1981 in Sydney, Australia.The Mary Hawton Trophy, the prize for the winner of the Australian teams championships for girls, was named after her.