Tanbridge House School is a coeducational secondary school located in Horsham, West Sussex, England. Its current head master is Mr Sheridan who started in 2022. The school teaches a variety of subjects across the curriculum. In 2012 95.7% of students achieved A*-C grades at GCSE. Of those, 79% achieved 5 A*-C including English and Maths.

In November 2012, the school achieved an 'Outstanding' Ofsted rating in all four key areas of inspection. This placed it in the top three per cent of secondary schools in the country and made it one of only seven 'Outstanding' secondary schools in the county.

There is a 'Student Voice' at Tanbridge which involves over 100 student representatives, who are involved in interviewing potential staff, leading on environmental and charitable issues and helping new pupils make the transition from primary to secondary school. The school was one of the first schools in West Sussex to achieve a Rights Respecting Schools Award (UNICEF).

There are SMART boards in every classroom, nine dedicated IT suites with another five computer areas and iPads. Since 2008, the school has had a Virtual Learning Environment and Moodle. The school has its own Learning Resource Centre.

The annual school production is held every summer at The Capitol Theatre in Horsham; West Side Story (2008) Sweeney Todd (2009) Les Misérables (2010), Evita (2011), The Phantom of the Opera (2012) and Miss Saigon (2013) were all sell out shows. Later shows include, Jekyll and Hyde (2017), Made in Dagenham (2018), High School Musical (2022) and Sister Act (2023).

Many of the students progress to colleges across the county, with the majority going to The College of Richard Collyer in Horsham although other colleges include Northbrook College in Worthing, Central Sussex College in Crawley, Brinsbury College in Pulborough and Chichester College.

The school has three houses, which are all namesakes of famous English sportspeople. They are:

• Redgrave, after Steve Redgrave
• Radcliffe, after Paula Radcliffe
• Wilkinson, after Jonny Wilkinson

The school has achieved the following in recent years

• Ofsted Outstanding (2012)
• Rights Respecting Schools Award (UNICEF)
• Eco Schools Award
• Specialist Schools and Academies Trust
• Healthy Schools
• Specialist Science College
• Specialist Maths & Computing School
• Artsmark Silver

Date	Notes
1627	The original Tanbridge House built by Richard Nye
1887	Tanbridge House rebuilt by Thomas Oliver in neo-Jacobean style. It is one of the first houses with electricity in Horsham. The building on Worthing Road is still extant today.
1920	Thomas Oliver dies; Tanbridge House is sold to West Sussex County Council for £7,000
1924	The building becomes the Horsham High School for Girls
1968	Tanbridge House described as "a fine example of the revived Wealden tradition"
1976	Horsham High School for Girls is merged with nearby Manor House School and becomes Tanbridge House School, a mixed comprehensive.
1988	Tanbridge House faces demolition but Audrey Robinson; a teacher at the school, launches a successful campaign to save the building.
1993	Foundation Stone for new school buildings off Guilford Road, adjacent to the A24 road (England) is laid by Sir Philip Ward. The new school had been planned by Chairman of Governors David Radbourne and Headmaster Neil Chapman.
1994	The new school site is opened. The former school buildings on the Manor House site are demolished (to be replaced by Sainsbury's supermarket), and Tanbridge House is sold for conversion to apartments.
2009	The school obtains the all-weather pitch from Broadbridge Heath Leisure Centre.
2012	Housing developments begin around the school. It is agreed that Tanbridge House School will be given more sports pitches once the developments are completed.
2016	Extensions to current school site completed.

This article's list of alumni may not follow Wikipedia's verifiability policy. Please improve this article by removing names that do not have independent reliable sources showing they merit inclusion in this article AND are alumni, or by incorporating the relevant publications into the body of the article through appropriate citations. (May 2011)

• Kirsten Cooke (born 1952), actress
• Devon Endersby (born 1992), first-class cricketer
• Mark Hawkins - handball player, represented Great Britain
• Jamie Hewlett - artist/cartoonist and developer of the comic strip Tank Girl, and co-creator of the band Gorillaz
• Max Sanders - Lincoln City and England youth midfielder
• Thomas Haines - (born 1998), first class cricketer for Sussex County Cricket Club
• Chris Nash - (born 1983), first class cricketer for Sussex County Cricket Club and Nottinghamshire County Cricket Club

• http://www.tanbridge-house-sch.co.uk
• Tanbridge House School Worthing Road site