[11] Mentone Girls' Grammar became affiliated with the Church of England in 1962, and subsequently the bishop's mitre was added to the school crest.

[13] Features of the campus include: a pre–tertiary learning centre for students in Years 11 and 12 known as the "Cobbalanna Senior College", the Junior School with specialised facilities, the Simpson Art Centre with facilities for photography and ceramics, "The Bay Cafe" is a cafeteria style lunch space, the David Hunt centre (named after the former Head Master) utilized for performing arts, the Annette Kellerman science wing and pool, named for the underwater ballerina of the same name, whose mother was a member of staff at the school during the 1920s, library, multi-media laboratories, and performing arts spaces.

[17] In 2019, Mentone Girls' Grammar opened their Wellbeing Precinct, transforming one third of the entire campus to make way for facilities such as an indoor pool with diving boards, multi-purpose courts for netball and basketball, and a synthetic multi-use pitch for soccer, hockey and tennis.

[18] The Mentone Girls' Grammar School crest was designed in 1924, by headmistress, Mary Pearson.

[20] Through this association, students from Year 7 to 12 are given the opportunity to compete against 24 other girls' schools, in up to twelve different sports.