This is a list of Old Melburnians, who are notable former students of Melbourne Grammar School in Melbourne, Victoria, Australia.

Alumni of Melbourne Grammar are known as Old Melburnians (abbreviated to OM, followed by the year of graduation), and automatically become members of the school's alumni association, the Old Melburnians' Society.^[1]

Notable alumni include one Governor-General, three Prime Ministers, four State Premiers, three Lord Mayors, three Australians of the Year, two Victoria Cross recipients, ten Supreme Court Justices, fourteen AFL premiership players, forty-two Olympians, four Australian Open champions, and many prominent scientists and entertainers.

• Richard Casey – 16th Governor-General of Australia, Governor of Bengal, former Australian of the Year, and final Australian in the House of Lords^[2]
• Sir Edmund Herring – longest serving Lieutenant Governor of Victoria

• Stanley Bruce – 8th Prime Minister of Australia
• Alfred Deakin – 2nd Prime Minister of Australia
• Malcolm Fraser – 22nd Prime Minister of Australia

• Ted Baillieu – 46th Premier of Victoria^[3]
• John Brumby – 45th Premier of Victoria^[3]
• Sir Rupert Hamer – 39th Premier of Victoria
• Arthur Moore – 23rd Premier of Queensland

• Sir John George Davies – 19th mayor of Hobart and cricketer
• Sir Harold Luxton – 61st Lord Mayor of Melbourne and businessman
• Sir Harold Gengoult Smith – 62nd Lord Mayor of Melbourne and doctor

• Richard Casey – 16th Governor-General of Australia, Governor of Bengal, former Australian of the Year (1969), and final Australian in the House of Lords
• Manning Clark – historian and former Australian of the Year (1980)
• Simon Mckeon – yachtsman, businessman, lawyer, philanthropist, and former Australian of the Year (2011)

• William Joynt – soldier, Victoria Cross winner
• Bill Newton – airman, Victoria Cross winner

• William Anderson – RAAF officer
• Alfred Brookes – first Director-General of the Australian Secret Intelligence Service^{[citation needed]}
• Sir Wilfred Deakin Brookes – businessman and RAAF officer
• Sir Samuel Burston – doctor, soldier, horseracing identity
• Adrian Cole – Air Chief Vice Marshall RAAF
• Sir Ernest Gaunt – Royal Navy Admiral
• Sir Guy Gaunt – Royal Navy Admiral and British Conservative member of parliament
• Harold Grimwade – soldier and businessman
• Jo Gullett – soldier, journalist and politician
• Sir Edmund Herring – soldier and judge
• Ronald Hopkins – WWII General
• Cedric Howell – First World War fighter pilot and flying ace
• Frederic Hughes – WWI General
• Tony Hyams – politician and banker
• Sir William Johnston – medical practitioner and army officer
• Ian Kennison – 5th Director-General of ASIS
• Sir Ian McIntosh – Royal Navy officer
• Richard Minifie – fighter pilot and flying ace
• Sir Leslie Morshead – soldier (MGS staff member)
• Sir Frank Kingsley Norris – military officer and soldier
• Philip Rhoden – Army officer and lawyer
• Sir Charles Ryan – military surgeon
• Cyril Seelenmeyer – VFL footballer, veterinary surgeon, winner of Military Cross
• Edward Smart – diplomat and general
• Sir Vernon Sturdee – Lieutenant-General and Chief of the General Staff
• Sir Roger Wheeler – former Chief of the General Staff
• Gordon Chesney Wilson – army officer
• Sir Edward Woodward – judge, Royal Commissioner and former head of ASIO

• Horace Crotty – Anglican Bishop of Bathurst
• Peter John Elliott – Auxiliary bishop of the Archdiocese of Melbourne
• Awdry Julius – Dean of Christchurch
• Geraldine MacKenzie – missionary
• John McKie – Archdeacon of Melbourne
• Gerard Tucker – priest and advocate for the poor
• Allen Winter – theological scholar and Bishop

• Arthur Abbott – Attorney-General of Western Australia
• Sir Keith Aickin – former Justice of the High Court of Australia
• Austin Asche – 3rd Chief Justice of the Northern Territory
• John Batt – former justice of the Supreme Court
• Maurice Blackburn – politician, lawyer and founder of Maurice Blackburn Lawyers
• Julian Burnside – barrister and human rights advocate
• Sam Calder – politician and flying ace
• Frank Callaway – former judge of the Supreme Court^{[citation needed]}
• Sir Harold Winthrop Clapp – transport administrator responsible for an overhaul of Victoria's train network
• Les Craig – politician in Western Australia
• Sir John George Davies – mayor of Hobart and cricketer
• Noël St. Clair Deschamps – public servant and diplomat
• Theodore Fink – solicitor and politician
• Jo Gullett – soldier, journalist and politician
• Sir Rutherford Guthrie – politician and grazier
• David Harper – former judge of the Supreme Court
• Sir Edmund Herring – Chief Justice of the Supreme Court and soldier
• Sir Edwin Hicks ("Ted") – diplomat and secretary of defence
• Sir Henry Hodges – Supreme Court Justice
• Vasey Houghton – politician
• Sir Wilfrid Kent Hughes – Rhodes Scholar, politician, Olympic hurdler, and organiser of the 1956 Olympics
• Geoffry Hurry – politician and lawyer
• Alexander Wigram Allen Leeper [de] – diplomat
• Sir Reginald Leeper – diplomat and founder of the British Council
• Sir Harold Luxton – businessman and Lord Mayor of Melbourne
• Sir Thomas Chester Manifold – politician and horse breeder
• Sir Walter Manifold – president of the Legislative Council
• Kenneth Marks – former Judge of the Supreme Court of Victoria and Royal Commissioner
• Chris Maxwell – Rhodes Scholar and President of the Victorian Court of Appeal
• John McMillan – diplomat
• William Moule – politician and cricketer
• Sir Keith Officer – diplomat
• Philip Opas – Barrister; defence counsel for Ronald Ryan
• William Ormiston – former Judge of the Supreme Court
• Sir Reginald Sholl – Rhodes scholar and former Judge of Victorian Supreme Court
• Tony Street – former Minister for Foreign Affairs
• Ted Tanner – Opposition whip (Victorian Legislative Assembly)
• John Thwaites – 24th deputy Premier of Victoria
• Agar Wynne – politician and Attorney-General of Victoria

• Mervyn Austin – Rhodes Scholar and former Headmaster of Newington College and professor in classics
• Edward Bage – polar explorer
• Sir James William Barrett – ophthalmologist and academic
• John F. O. Bilson – Professor of Finance
• Sir Robert Blackwood – businessman and first Vice-Chancellor of Monash University
• Manning Clark – historian and former Australian of the Year
• Frank Cumbrae-Stewart – barrister and Garrick Professor of Law
• Peter Dixon – economist
• Pierre Gorman – expert on deaf communication
• Sir John Grice – businessman and Vice-Chancellor of The University of Melbourne
• Sir Russell Grimwade – chemist, botanist, and philanthropist
• Sir Keith Hancock – Rhodes Scholar and historian
• Sir Edward Hughes – eminent surgeon and former president of the Royal Australasian College of Surgeons
• Sir George Julius – inventor of the first tote-board and first chairman of CSIRO
• Charles Kellaway – medical researcher and second director of the Walter and Eliza Hall Institute
• Richard Larkins – physician and vice-chancellor of Monash University
• Miles Lewis – expert on urban conservation
• Sir Irvine Masson – chemist and vice-chancellor of the University of Sheffield
• Ainslie Meares – psychiatrist and expert in the medical use of hypnotism
• Sir Edward Fancourt Mitchell – barrister and expert in constitutional law
• Norval Morris – legal academic and criminologist
• Alfred John North – ornithologist
• Andrew Prentice – mathematician and expert on the formation of the Solar System
• John Rymill – Polar explorer
• A.G.L. Shaw – historian and academic
• Godfrey Tanner – academic
• Gerard Tucker – priest and advocate for the poor

• Ross Adler – business executive and philanthropist
• Sir Harry Brookes Allen – pathologist
• Clive Baillieu – businessman, public servant, and rower
• Ameet Bains – CEO of Western Bulldogs
• Robert Champion de Crespigny – multi-millionaire founder of Normandy Mining Limited and former Australian Businessman of the Year
• Martin Chapman – New Zealand barrister and founder of Chapman Tripp
• Sir Peter Derham – business executive and philanthropist
• Carrillo Gantner – founder of the Playbox Theater and patron of the arts, former Victorian of the Year
• Michael Georgeff – computer scientist
• Aubrey Gibson – businessman and philanthropist
• Sir John Grice – businessman and Vice-Chancellor of The University of Melbourne
• Sir Russell Grimwade – businessman and philanthropist
• Simon Mckeon – champion yachtsman, businessman, lawyer, philanthropist, and Australian of the Year
• Andrew Michelmore – Rhodes Scholar, mining executive, and first Australian gold medal for rowing
• Lancelot de Mole – engineer and inventor of the first tank
• Jim Penman – founder of Jim's Group and historian
• Brian Roet – hypnotist and AFL premiership winner

• Oscar Asche – actor, director, and writer
• John Brack – artist
• John Bryson – author
• James Campbell – journalist
• Robin Casinader – musician
• Manning Clark – historian and Australian of the Year
• Erle Cox – journalist and science fiction writer
• Caroline Craig – actress
• Andrew Daddo – actor, voice artist, author and television personality
• Jonathan Dawson – screenwriter, director, academic and columnist
• Keith Dunstan – journalist and author
• Peggy Frew – ARIA-winning composer and novelist
• Ian Gawler – author
• William Hay – historical author
• Sir Randal Heymanson – journalist
• Leslie Howard – decorated pianist
• Barry Humphries – Tony award-winning actor and comedian^[4]
• Barrie Kosky – opera and theatre director
• Nam Le – writer
• Derwent Lees – landscape painter
• Terence (Terry) James McCrann – Australia's leading business journalist
• Angus McKean - Drummer and Musician
• Sir William McKie – former Organist and Master of the Choristers at Westminster Abbey
• Tom Morris
• Christopher Muir – producer, director and Head of ABC Television drama
• Ken Myer – founding chairman of the ABC and patron for the arts
• Rupert Myer – Chairman of the Australia Council for the Arts
• Li-Wei Qin – international concert cellist
• Hugo Race – musician^{[citation needed]}
• Dan Robinson – singer
• Nick Russell – television actor, producer, and director
• Michael Schildberger – journalist and host of A Current Affair
• Geoffrey Simon – orchestra conductor
• Rob Sitch – film director, producer, and screenwriter
• Sir Frank Tait – theatre entrepreneur
• Frank Thring – actor in Ben-Hur and King of Kings
• Mick Turner – musician (Dirty Three) and artist
• Michael Veitch - actor, broadcaster, author
• Chester Wilmot – war correspondent