[5] As of 2025, annual fees for a Year 12 student studying at Mentone Grammar were slightly over $35,000.

It is part of the 31st Battalion (Melbourne Schools) and now represents the largest school-based Unit in Victoria.

Former AFL player and coach, Brenton Sanderson commenced as the school's Director of Sport in 2023.

Saturday sport is compulsory for all students in Years 7–12, with boys competing in the Associated Grammar Schools of Victoria (AGSV) competition and girls in the combined AGSV / Associated Public Schools (APS) competition in both Summer and Winter sports.

On Saturday 29 January 2022, Mentone Grammar's 2022 Head Prefect, Evie Stansby made Mentone Grammar sporting history by becoming the first female to earn a place on their First XI cricket team.