Alumnae of Toorak College are commonly referred to as "Old Girls", and may elect to join the schools alumni association, the Toorak College Old Girls Association (TCOGA). The TCOGA was founded on 15 June 1908, as a way of keeping past students in touch with one another. In 1918, its name was changed to "The Old Girls Association of Toorak College", and featured a membership of 389. Today there are approximately 3,000 members, and the association aims to support the college by providing such things as funds for the archives centre, scholarships, student prizes, the year 12 leavers' cocktail party and year seven luncheon. The TCOGA also supports a golf and tennis team which compete against other old collegian associations.
