She was married to the bass-baritone singer Howard Mawson and frequently performed with him in the Toronto Light Opera Association.
After its demise, she appeared in 1957 as Hanna in The Merry Widow and Carrie Pipperidge in Carousel with the Opera Festival Association of Toronto, and in the 1960s with its successor, the Canadian Opera Company, as Martha in Faust and Flora in La traviata, and also at the Stratford Festival as Hebe in H.M.S.
Other roles included Miss Todd in Gian-Carlo Menotti's The Old Maid and the Thief.
Mawson was born in Toronto and died in her native city at the age of 81.
The Elizabeth Mawson Theatre Legacy Fund will ensure support is available for scriptwriters, choreographers, performers, songwriters and directors and make sure that read-throughs and workshops are made possible for new development projects at The Charlottetown Festival.