This is a list of Old Johnians (abbreviated OJs), former pupils of St. John's School, Leatherhead, which is a public school in Surrey, England.

• Richard Acworth (born 1936), Archdeacon of Wells from 1993 to 2003^[1][2][3]
• David Alesworth, ARBS (born 1957), artist based in Pakistan^[4]
• The Rt Rev. Hugh Ashdown (1904–1977), 8th Bishop of Newcastle^[3]

• David Balcombe (born 1984), cricketer^[5]
• Edward Alexander Bannister CMG KC (born 1942), former Commercial Court Judge of the Eastern Caribbean Supreme Court based in the BVI^[3]
• Thomas Barfett MA (1916–2000), Archdeacon of Hereford, Canon Residentiary at Hereford Cathedral between 1977 and 1982^[6]
• Robert Stanley Warren Bell (1871–1921), novelist, journalist and first editor of The Captain^[7]
• The Rev. Dr. Anthony Bird (1931–2016), priest, physician and academic^[8]
• The Rt Rev. Jim Bishop (1908–1994), Suffragan Bishop of Malmesbury^[9]
• John Blair FSA, FBA (born 1955), Professor of Medieval History and Archaeology at the University of Oxford and Fellow of Queen's College, Oxford^[3]
• Paul Boissier (1881–1953), former headmaster of Harrow School, wartime civil servant and cricketer^[3]
• John Westerdale Bowker (born 1935), Honorary Canon of Canterbury Cathedral, consultant to UNESCO, BBC broadcaster, author and editor^[10]
• Peter Bruinvels (born 1950), former Conservative MP^[11]
• Septimus Brutton (1869–1933), cricketer^[12]
• Sir Paul Bryan DSO MC (1913–2004), former Conservative MP^[13]
• The Rt Rev. Mark Bryant (born 1949), 2nd Bishop of Jarrow^[3]
• John Burgess (1928–2015), Ireland Rugby International^[14]
• Ronald Burroughs CMG (1917–1980), diplomat, Her Majesty's Ambassador to Algeria between 1971 and 1973^[15]
• Rupert Bursell KC (born 1942), barrister and priest^[3]

• Sir Henry Calley DL DFC DSO (1914–1997), senior officer in the RAF during World War II, local politician and owner of a stud farm^[16]
• Basil Fulford Lowther Clarke (1908–1978), priest and architectural historian^[17]
• Rear Admiral Christopher Clayton (born 1951), former senior officer in the Royal Navy^[3]
• Victor Clube (born 1934), first class cricketer and astrophysicist^[18]
• John Collinson (1911–1979), cricketer^[19]
• John Cook (1918–1984), composer, organist and church musician^[20]
• James Cope (born 1966), cricketer^[21]
• The Ven. Alexander Cory (1890–1973), Archdeacon of the Isle of Wight^[3]
• Air Commodore James Baird Coward AFC (1915–2012), senior officer in the Royal Air Force^[22]
• Walter Crawley (1880–1940), lawn tennis player who competed in the 1908 Summer Olympics^[23]
• Sir Peter Cresswell DL (born 1944), former judge of the High Court^[3]
• Joseph Campbell (Captain of Rugby 2022-23)

• The Rt Rev. Edward Darling (born 1933), Bishop of Limerick and Killaloe between 1985 and 2000^[3]
• Jenkin Alban Davies (1885–1976), Wales Rugby International^[24]
• The Rt Rev. Stephen Davies (1883–1961), Bishop of Carpentaria^[3]
• Giles Dilnot (born 1971), BBC Daily Politics Political Correspondent and co-presenter^[25]
• Wing Commander John Dowland GC (1914–1942), senior officer in the Royal Air Force who was awarded the GC^[26]
• Lancelot Driffield (1880–1917), cricketer^[27]
• Peter Drury (born 1967), football commentator^[28]
• Kenneth Durham (1954–2016), educator^[29]

• Basil Ede (1931–2016), wildlife artist^[30]
• John Hugh David Eland FRS (born 1941), chemist^[3]
• Mohamed A. El-Erian (born 1958), President of Queens' College, Cambridge, businessman^[31]
• The Ven. John Mascal Evans (1915–1996), Archdeacon of Surrey between 1968 and 1980^[3]
• Arthur Evanson (1859–1934), England Rugby International^[32]
• Wyndham Evanson (1851–1934), England Rugby International^[32]
• Sir Anthony Ewbank QC (1925–2011), judge^[33]

• Sir Richard Lavenham Gardner FRSB FRS (born 1943), embryologist and geneticist^[3]
• Paymaster J.T. Gedge (1878–1914), first British officer to be killed in the First World War^[34]
• Professor Nigel Glendinning (1929–2013), authority on Goya and 18th Century Spanish literature^[35]
• The Rt Rev. Ronald Goodchild (1910–1998), Bishop of Kensington between 1964 and 1980^[36]
• Geoffrey Grigson (1905–1985), poet, anthologist and critic^[37]
• Air Commodore John William Boldero "Jack" Grigson DSO, DFC & Two Bars (1893–1943), senior British officer in the Royal Air Force^[3]
• Sir Wilfrid Vernon Grigson CSI (1896–1948), soldier, senior civil servant and colonial administrator^[3]

• John Harvey (1911–1997), architectural historian^[38][39]
• Sir David Hatch CBE (1939–2007), BBC Radio manager and producer^[40][41]
• Richard Haughton (born 1980), rugby sevens referee and former rugby union player^[42]
• Gavin Hewitt (born 1951), Europe Editor of BBC News^[43]
• Robert Lockhart Hobson CB (1872–1941), Keeper, Department of Oriental Antiquities and Ethnography at the British Museum^[44]
• The Ven. George Hodges (1851–1921), Archdeacon of Sudbury^[45]
• Paymaster-Captain Basil Hood CBE DSO (1886–1941), senior officer in the Royal Navy^[3]
• Sir Anthony Hope (1863–1933), author of adventure novels such as The Prisoner of Zenda^[46]
• Major-General Malcolm Hunt OBE RM (born 1938), Commanding Officer of 40 Commando RM during the Falklands War^[3]

• Michael James (born 1934), cricketer^[47]
• Gwilliam Iwan Jones (1904–1995), photographer and anthropologist^[48]

• George Kruis (born 1990), England Rugby International^[49]

• Claudia MacDonald (born 1996), England Rugby International^[50]
• Alex Macqueen (born 1973), actor^[51]
• The Rt Rev. Morris Maddocks (1928–2008), bishop^[52]
• Humfrey Malins CBE (born 1945), former Conservative MP^[53]
• Sir Arthur Wellington Marshall DL (1841–1918), High Sheriff of Cambridgeshire and Huntingdonshire in 1890^[54]
• Very Rev. Peter Jerome Marshall (born 1940), Dean of Worcester, 1997–2006, now Emeritus^[3]
• Christopher Matthews (1950–2004), businessman^[55]
• Air Vice Marshal Forster Herbert Martin "Sammy" Maynard, CB, AFC (1893–1976), World War II flying ace^[3]
• The Very Rev. John Methuen (1947–2010), Dean of Ripon between 1995 and 2005^[3][56]
• Guy Michelmore, composer and former news presenter^[57]
• Patrick Ferguson Millard (1902–1972), artist^[58][59]
• Roger Milner (1925–2014), actor, author and dramatist.^[60]
• Philip Morgan, cricketer, athlete, clergyman and educator^[61]
• James Morwood (1943–2017), classicist^[62]

• L. Everard Napier CIE FRCP (1888–1957), physician specialising in tropical medicine^[3][63]
• Lllewellyn Charles Nash (1868–1918), Ireland Rugby International^[32]
• Andrew Norriss (born 1947), author and TV sitcom writer^{[citation needed]}

• The Very Rev. John Penfold (1864–1922), Dean of the Island and Bailiwick of Guernsey and its Dependencies^[3]
• Thomas Perkins (1870–1946), cricketer^[64]
• Sir Stephen Herbert Pierssené (1899–1966), General Director of Conservative Central Office between 1945 and 1957^[65]
• Denys Campion Potts (1923–2016), scholar and authority on French literature^[66]

• Reverend Vivian Redlich, missionary in Papua New Guinea when the Japanese invaded in 1942, beheaded in August that year^[67]
• Jonathan Rendall (1964–2013), author^[68]
• Lieutenant Commander Eric Gascoigne Robinson VC (1882–1965)^[69]
• Lord Richard Rogers (1933–2021), architect^[70]
• Sir Robert Romer GCB PC FRS (1840–1918), judge^[71]
• The Rt Rev. David Rossdale (born 1953), former Bishop of Grimsby^[3]
• Squadron Leader Peter Rothwell (1920–2010), bomber pilot, key figure in the defence of Malta during World War II^[72]

• Dr Louis Charles Arthur Savatard Hon.M.Sc., L.S.A. (1874–1962), dermatologist^[73]
• Lt.-Col. Derek Seagrim VC (1903–1943)^[74]
• Charles Haslewood Shannon (1863–1937), artist^[75]
• The Rt Rev. E.D. Shaw (1860–1937), cricketer and later Bishop of Buckingham^[76]
• Victor Silvester OBE (1900–1978), dancer, musician and bandleader^[77]
• Nicholas Smith (1934–2015), actor^[78]
• Air Commodore Ian Stewart, senior officer in the Royal Air Force^{[citation needed]}
• Claude Stokes CIE DSO OBE (1875–1948), Indian Army officer, later diplomat^[3]
• Raymond Toole Stott MBE (1910–1982), bibliographer, historian of the circus and its allied arts^[79]
• Patrick Sykes (1925–2014), England Rugby International^[32]
• Wymond Cory Symes (1867–1961), businessman, sportsman and member of the Bombay Legislative Council^[80]

• Sir Thomas Shenton Whitelegge Thomas GCMG GCStJ (1879–1962), last Governor of the Straits Settlements^[3]
• Simon Thomas (born 1973), former Blue Peter presenter^[81]
• John Henry Thorpe OBE (1887–1944), Conservative MP^[82][83]
• Ryan Trevitt (born 2003), professional footballer^[84]
• Sir Arthur Charles Trevor, KCSI (1841–1920), senior civil servant and colonial administrator^[3]
• Dr Robert Twycross FRCP FRCR (born 1941), Macmillan Clinical Reader in Palliative Medicine, Oxford University, 1988–2001, now Emeritus^[3]

• The Ven. Ted Ward (1919–2005), Archdeacon of Sherborne and Chaplain of the Royal Chapel in Windsor Great Park^[85]
• Sir Telford Waugh KCMG (1865–1950), diplomat^[86]
• John Wells (born 1939), Professor of Phonetics, University College London, 1988–2006, now Emeritus^[3]
• Edward Allan Wicks CBE (1923−2010), Organist, Canterbury Cathedral, 1961–88^[3][87]
• William Williams (1866–1945), Wales Rugby International^[32]
• The Rt Rev. Leonard Wilson (1897–1970), priest, Bishop of Singapore 1941–49, Dean of Manchester 1949–53, Bishop of Birmingham 1953—69^[88]
• The Ven. Mark Wilson (born 1946), Archdeacon of Dorking, 1996–2005^[3]
• Sir Wilfrid Wentworth Woods KCMG KBE (1876–1947), colonial administrator^[3]
• Lieutenant Geoffrey Harold Woolley VC (1892–1968), the first Territorial Army officer to win the VC^[89]
• Sir Leonard Woolley (1880–1960), archaeologist^[90]