Ashdown House is a mixed prep school in Forest Row, East Sussex. There are currently around 101 pupils from the ages seven to thirteen, currently with a roughly even split of boys and girls. in the last three years, a significant number of pupils have passed successfully into their first choice of senior school.

Billy Williamson was the headmaster from 1949 to 1974, succeeded by Clive Williams. In 2009 the headmaster Robert Taylor left to become Registar at Harrow School and Dominic Floyd became headmaster in September 2009.^{[citation needed]}

Ashdown House was originally an 18th century country house, completed in 1794 by Benjamin Latrobe who was one of the architects of the U.S. Capitol Building in Washington DC and also designed the nearby Hammerwood Park and the front portico of the White House in Washington DC. The School first became co-educational in 1975.

Ashdown House was one of the leading prep schools in Britain,^{[citation needed]} with many scholarships being won to major public schools. In the 2010/2011 academic year, 6 academic scholarships were won by students of the relatively small school. Notable future schools of choice for Ashdown pupils include: Harrow, Eton, Benenden, Charterhouse, Bryanston, Oundle, Rugby, Sevenoaks, Stowe, Radley, Marlborough, Winchester and Wellington College.

East Sussex ( /ˈsʌsɨks/) is a county in South East England. It is bordered by the counties of Kent, Surrey and West Sussex, and to the south by the English Channel.

East Sussex is part of the historic county of Sussex, which has its roots in the ancient kingdom of the South Saxons, who established themselves there in the 5th century AD, after the departure of the Romans. Archaeological remains are plentiful, especially in the upland areas. The area's position on the coast has also meant that there were many invaders, including the Romans and later the Normans. Earlier industries have included fishing, iron-making, and the wool trade, all of which have declined, or been lost completely.

Sussex is traditionally divided into six sub-divisions known as rapes. From the 12th century the three eastern rapes and the three western rapes each had separate quarter sessions, with the county town of the three eastern rapes being Lewes. This situation was formalised by Parliament in 1865, and the two parts were made into administrative counties, each with distinct elected county councils in 1889 under the Local Government Act 1888. In East Sussex there were also three self-administered county boroughs: Brighton, Eastbourne and Hastings.

Ashdown House may refer to: