|Established||1908 (as Lord Mayor Treloar Hospital)|
|Type||Primary, Secondary, Special, Residential & Day|
|Founder||Sir William Purdie Treloar|
Enabling Education 
Treloar Trust 
The school is administered by Treloar Trust a registered charity which also runs the sister institute Treloar College based in the nearby Holybourne. Many people refer to one or all of the Treloar trinity (School, College and Trust) as "Treloar's" and indeed the official logo is "Treloar's: Enabling Education".
The Treloar story starts in 1907 when the then Lord Mayor of the City of London, Sir William Purdie Treloar, set up a 'Cripples' Fund' as his mayoral appeal. His aim was to build a hospital and school outside the city for children with non-pulmonary tuberculosis. On June 13 of that year, he wrote in his diary that Her Majesty Queen Alexandra 'came to Mansion House to open the Queen's Fete in aid of my Cripples' Fund'. In 1908, Sir William opened his school and hospital in Alton, Hampshire. Since then, Treloar’s has steadily grown and developed, becoming one of the country’s leading providers of education, care, therapy, medical support and independence training for disabled young people.
School Headteachers have included :
- 19?? - 1972: George Heywood
- 1972 - 1974: Johnston Smith
- 1974 - 1991: Alec MacPherson
- 1991 - 2006: Neil Clark
- 2006 - 2007: Heather Boardman
- 2007 - 2011: Harry Dicks
- 2011 - current: Melissa Farnham
Treloar School has built a reputation of developing the sporting abilities of young people with physical disabilities. Many students continue their sporting progress at Treloar College and beyond. Particular prowess and development is shown in boccia (a target throwing/rolling ball game). The school also has a good reputation in the field of athletics, with many budding athletes coming through in both track and field events many of them with paralympic potential being shown already in their young careers as athletes. The school also has produced many successful swimmers. The school hopes to have many former students representing Great Britain at the 2012 Paralympics in London.
Notable alumni 
- Ben Rushgrove (paralympic silver medallist track athlete)
- Julie Fernandez (actress)
- Steven Goss (writer)
- David Smith (paralympic Gold medallist boccia player)
- Danielle Watts (paralympic swimmer)
- Tom Yendell (artist)