Ipswich School is a public school (English fee-charging boarding and day school) for pupils aged 3 to 18 in Ipswich, Suffolk, England.

North of the town centre, Ipswich School has four parts on three adjacent sites. The Pre-Prep and Nursery were established in 1883 with the aim of preparing children aged 7 to 11 for entry into the Senior School. The Senior School occupies the main school site. The main buildings are a distinctive example of Victorian architecture, with Tudor style brick. The main building and chapel are both Grade II listed. The school buildings surround a central playing field and cricket square along with the Cricket Pavilion. The remainder of the School's sport's fields are located at a nearby site on the edge of the town. The School has a new purpose-built music school, adjacent to the Cricket Pavilion.

Within the Senior School the students are divided into three: the Lower School (Years 7 and 8), the Middle School (Years 9–11) and the Sixth Form (Years 12 and 13).

The School operates on an independent, fee-charging basis, with a few scholarships including sports, academic and art and music and means-tested bursaries. It selects pupils by the use of entrance exams. The School was designated as having a Church of England Religious Character. The school has, however, not chosen to register as having a Religious Charter under the 2009 order.

The oldest record that may refer to the school in Ipswich goes back to 1399, in a legal dispute over unpaid fees. The first recorded mention of a grammar school in Ipswich is 1416. The school was most likely set up by the Merchant Guild of Ipswich, which became the Guild of Corpus Christi. The sons of the ruling burgesses were educated for a fee, and the sons of nobility and gentry could attend at higher fees.

From 1483 the school moved to a house bequeathed by ex-pupil Richard Felaw, a merchant and politician. His will also provided rental income for the school and stated that, for Ipswich children, only those parents with income over a certain amount should pay fees.

In 1528, building work began on an ambitious project for a 'college' school in Ipswich to rival the likes of Eton College. Thomas Wolsey, Cardinal Archbishop of York and Lord Chancellor of England, funded his 'College of St Mary' by ''suppressing' local religious houses such as Rumburgh Priory. Ipswich school was incorporated into the college. Wolsey, who was from Ipswich and may have attended Ipswich school, intended the new institution to be a feeder to his recently built 'Cardinal's College' of Oxford University, which is now known as Christ Church. However, Wolsey fell out of favour with King Henry VIII and the college in Ipswich was demolished in 1530 while still half-built. The school pupils returned to Felaw's house.

The play Henry VIII by William Shakespeare mentions the two colleges during a recounting of the life of Cardinal Wolsey; it was the college of Oxford University that outlasted him and became widely known:

'Those twins of learning that he rais'd in you,
Ipswich and Oxford! One of which fell with him,
Unwilling to outlive the good that did it;
The other, though unfinish'd, yet so famous'

After Wolsey's downfall in 1530, his former ally Thomas Cromwell ensured the survival of the School by securing for it a new endowment from King Henry VIII and the status of a royal foundation. This was confirmed by Queen Elizabeth I in the charter that she granted to the School in 1566. For part of the School's history it was known as Queen Elizabeth's Grammar School, Ipswich. The School's coat of arms and motto, Semper Eadem (Always the Same), are those of Elizabeth I. The Monarch of the United Kingdom is the School's Visitor.

In 1614 the school moved across the road to the Blackfriar's refectory. During the reign of James I part of the Blackfriars Monastery was appropriated for use as a classroom, and the Blackfriars remained the School's home until 1842 when the building was deemed to be unsafe. For a few years teaching was carried on in temporary premises in Lower Brook Street.

In 1851 Prince Albert laid the foundation stone for the School's first purpose-built premises in Henley Road. By 1852 the new buildings were in use. The School has remained on the Henley Road site ever since.

The Town Library of Ipswich with books dating back to the 15th century is located in the headmaster's study where it is held by the school on behalf of the town of Ipswich.

More recently the School has moved away from the traditional full boarding ethos still held by similar schools such as Eton and Harrow. The number of boarding houses has reduced to one and the majority of students are day pupils. The School has flourished under this new approach.

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The school has six day houses – Holden, Rigaud, Sherrington, School, Broke and Felaw – into which all pupils are filtered from year 9/Upper 6th Form onwards, and a single large boarding house – Westwood. There is a good deal of competition between the houses and every year, the houses compete for the Ganzoni Cup (house cup), which is won by gaining points from winning inter-house events. These include most sports as well as others such as debating and art. The final and most important event is Sports Day, in the Summer Term, on which the athletics competitions take place. School is the oldest house and dates from the days when the boys lived and were taught in one house (called School House). It later became the boarding house which occupied a part of the main building on Henley Road.

The school's single boarding house is called Westwood. Westwood is no longer a part of the school house system where students were organised into school houses depending on which boarding house they were in. For example, Sherrington House occupied Highwood and, as previously mentioned, School House occupied part of the main Victorian building on Henley Road.

The school offers a wide selection of sports, ranging from the traditional rugby, hockey, netball and cricket, to others such as indoor hockey, sailing, and Eton Fives, being one of a handful of schools in the country to have Fives courts. The school also offers other activities, including the Torino Debating Society, the Dead Poets Society (for A-Level English students) led by Sixth Form pupils, a Sub Aqua Club, Duke of Edinburgh Award, and a Combined Cadet Force with Army and Air Force sections. The school's music department provides several orchestras, ensembles, and choirs. Plays are staged every year, in either Great School or Little School.

Ipswich School Ground

Ground information
Establishment	1859 (first recorded match)
Team information
Suffolk (1935–1938, 1960–1976, 1986–2000 & 2007–present)
As of 13 August 2010 Source: Ground profile

The first recorded cricket match on the school ground was in 1859, when Suffolk played an All-England Eleven. The ground hosted its first Minor Counties Championship match in 1935 when Suffolk played Hertfordshire. To date the ground has hosted 33 Minor Counties Championship matches and 2 MCCA Knockout Trophy matches.

The ground has also hosted a single List A match between Suffolk and Kent in the 1966 Gillette Cup.

The three main publications are The Ipswichian which is the annual School magazine, The OI Journal which is a publication for Old Ipswichians and The Occasional. The Occasional is the school newspaper published every Monday and is written by pupils. It is edited by the Communications Manager. It contains articles of note and interest to the members of the school such as sports results and upcoming events. It has recently celebrated its 1000th issue.

William Howorth was the first Headmaster. previously the school had a master and an Usher as deputy.

• 2024- Nick Gregory
• 2010–2024 Nicholas J. Weaver
• 1993–2010 Ian Galbraith
• 1972–1993 John Blatchly
• 1950–1972 Patrick Hassell Frederick Mermagen
• 1933–1950 Truman Tanqueray
• 1919–1933 Edward Charles Sherwood
• 1906–1918 Arthur Kenelm Watson
• 1894–1906 Philip Edwin Raynor
• 1883–1894 Frederick Herbert Browne
• 1858–1883 Hubert Ashton Holden
• 1850–1858 Stephen Jordan Rigaud
• 1843–1850 John Fenwick
• 1832–1843 James Collett Ebden
• 1800–1832 William Howorth

Former pupils, known as "Old Ipswichians", include:

• Cardinal Thomas Wolsey (c. 1473–1530), statesman under Henry VIII.
• Sir Robert Hitcham (c.1572–1636), judge and Member of Parliament
• Thomas Howard, 2nd Duke of Norfolk (1443–1524), soldier and statesman
• William Kirby (entomologist) (1759–1850)
• Rear Admiral Sir Philip Broke KCB (1776–1841), naval officer
• Sir Charles Broke Vere (1779–1843), Army Officer
• William King (1786–1865), Physician, Philanthropist and pioneer of the cooperative movement.
• Charles Keene (1823–1891), artist for Punch
• Sir John Gordon Sprigg (1830–1913), Prime Minister of the Cape Colony
• Charles Cooke (1836–1892), cricketer and clergyman
• Sir Edward Poynter Bt (1836–1919), artist and President of the Royal Academy
• Sir H. Rider Haggard (1856–1925), author of King Solomon's Mines, She and other works.
• Sir Charles Scott Sherrington (1857–1952), Nobel laureate and physician
• Lieutenant-General Sir Edwin Alderson (1859–1927), first commander Canadian Expeditionary Force in World War I.
• Percy John Heawood (1861–1955), mathematician and Vice-Chancellor of Durham University
• Adair Roche, Baron Roche (1871–1956), barrister and law lord
• Cecil Howard Lay (1885–1956), architect, artist and poet
• Edward Ardizzone (1900–1979), artist
• Professor Sir Charles Frank FRS (1911–1998), physicist
• Geoffrey Rees-Jones (1914–2004), former Welsh rugby international.
• Peter Brunt (1917–2005), historian
• Crelin Bodie (1920–1942), a flying ace of the Royal Air Force during the Second World War
• Ian Hendry (1931—1984), film, television and theatre actor
• Air Commodore Timothy Thorn (born 1942), Royal Air Force pilot
• Colin Simpson (born 1942), England national rugby player
• Baron Robert Gillespie of Blackhall, OBE (born 1947), industrialist and author
• Right Reverend Peter Wheatley (born 1947), former Bishop of Edmonton
• Henry Staunton (born 1948), businessman
• Kevin Ash (1959–2013), journalist, author, and motorcycling correspondent at The Daily Telegraph
• Nils Blythe (born 1956), journalist and presenter
• Professor Mark Bailey (born 1960), England national rugby player
• David Sawer (born 1961), composer
• Richard Edgar-Wilson (born 1963), tenor
• Peter Florence CBE (born 1964), festival director and founder of the Hay Festival
• John Penrose (born 1964), Conservative Member of Parliament
• Russell Heap (born 1968), cricketer
• Tom Withers (born 1968), music producer and DJ better known as 'Klute'
• James King, film critic and broadcaster
• Adam Rutherford (born 1974), geneticist, author, and broadcaster
• Nicholas Pert (born 1981), chess grandmaster
• Richard Mann (born 1982), cricketer
• Jack Hawkins (born 1985), actor
• Harry Martin (born 1992), Great Britain Hockey Team London 2012
• Alexander Albon (born 1996), Thai-British Williams Racing Formula 1 Driver
• Hannah Martin (field hockey), (born 1994) GB and England Hockey player, 2020 Olympic Bronze medalist, 2022 Commonwealth Games Gold medalist.
• George Henry Alexander Clowes, (born 1877), doctor and medical researcher. He was responsible for mobilising Eli Lilly resources to mass-produce insulin.
• Henry Patten, (born 1996), British tennis player, 2024 winner of Wimbledon Men's Doubles.

• List of the oldest schools in the United Kingdom

• John M. Blatchly, A Famous Antient Seed-Plot of Learning – A History of Ipswich School (Ipswich 2003).
• G.R.W. Webb, The History of Ipswich School and Education in Ipswich (Ipswich 2005).

• Ipswich School website
• Historic England. "Details from listed building database (1037743)". National Heritage List for England.
• Ipswich School Ground on CricketArchive
• Ipswich School Ground on Cricinfo