|Motto||Latin: "Ad Alta"
|Type||Independent day and boarding school|
|Religion||Church of England|
|Chairman of Governors||R Venables Kyrke|
|DfE URN||126110 Tables|
|Colours||Blue and White|
|Former pupils||Old Seafordians|
Seaford College is an independent co-educational boarding and day school at East Lavington, south of Petworth, West Sussex, England. Founded in 1884, it is a member of the Headmasters' and Headmistresses' Conference. The college is in Lavington Park, a 400 acres (1.6 km2) Area of Outstanding Natural Beauty in the South Downs. The land is owned by a charitable trust and the site is run by the Board of Governors who are the trustees.
The College was founded at Corsica Hall, Seaford on the East Sussex coast, in 1884 by Colonel Frederick Savage, who also served as headmaster from 1884 until 1920. In 1940, the College was disrupted by a government order requisitioning all boarding school premises in Seaford and giving only six weeks in which to find a safe home elsewhere. The College was evacuated to Worthing for the duration of World War II, and once peace had resumed, the new Headmaster Canon Charles Johnson began to look for a more suitable site, the College having outgrown its original premises in Seaford. In 1946 the decision was made to buy the estate at Lavington Park and the school moved to its current location. As of the academic year 2008/09 Senior School day fees are approximately £15,000 per year, with Senior School boarding fees approximately £20,000, though a number of bursaries and scholarships are available.
The main school building, previously Lavington Park country house, is a Grade II* listed building. 
In the 2010 GCSE results 87.5% of the school's pupils achieved five or more passes at grades A* to C, with 73 per cent of pupils achieving five or more passes at the higher grades including English and maths.
Notable Old Seafordians
- Ahmed Chalabi, President of the Iraqi Governing Council (2003) and Deputy Prime Minister of Iraq
- Diwan Chaman Lall, Member of the Indian Rajya Sabha
- Anthony Buckeridge OBE, children's author
- Lance Dossor, pianist
- Val Guest, film director
- Tom Odell, singer
- Matthew Rose, opera singer
- Toby Stephens, actor
- Jeremy Groome, Sussex cricketer
- Adrian Jones, Sussex and Somerset cricketer
- David Purley, Formula One driver
- Hugh Bentall, pioneer of open-heart surgery
- Sir Louis Blom-Cooper, lawyer and Chairman of the Press Council
- Uri Dadush, economist
- Sir Roger De Haan CBE, Chairman of Saga Group
- Derek Marks, Editor of The Daily Express (1965–1971)
- William Mason, Director General of the Guernsey Financial Services Commission
Headmasters of Seaford
- Colonel Frederick Savage (1884–1920)
- L.S.A Cowan (1920–1928)
- The Revd John Macnutt (1928–1931)
- The Revd William Hindley (1931–1935)
- W. Leslie Land (1935–1944)
- The Revd Charles Johnson (1944–1990)
- Charles Hannaford (1990–1996)
- Toby Mullins (1997–2013)
- John Green (2013–present)
- Seaford College - Reviews, Rankings, Reports, Stats & News 2009/10
- "Seaford College Fees". Archived from the original on March 28, 2009. Retrieved 2009-04-28.
- "Name: LAVINGTON PARK / SEAFORD COLLEGE List entry Number: 1232490". Historic England. Retrieved 26 June 2015.