Seaford College is an independent co-educational boarding and day school at East Lavington, south of Petworth, West Sussex, England.^[1] 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 is the inspiration for the Jennings and Darbishire children's books, written by alumnus Anthony Buckeridge.

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 2022/23 Senior School day fees are approximately £25,000 per year, with Senior School boarding fees approximately £38,000, though a number of bursaries and scholarships are available.^[2]

The main school building, previously Lavington Park country house, is a Grade II* listed building.^[3]

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.^[4]

• 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)

• Constantine II of Greece – patron
• George I of Greece – patron
• George II of Greece – patron
• Paul of Greece – patron
• Richard Chaloner, 1st Baron Gisborough – Chairman of Governors
• Bill Cuthbertson – housemaster
• Harold Maxwell-Lefroy – assistant master