Windlesham House School is an independent boarding and day school for boys and girls aged 4 to 13 on the South Downs, in Pulborough, West Sussex, England. It was founded in 1837 by Charles Robert Malden and was the first boys' preparatory school in the United Kingdom. In 1967 it became the first IAPS co-educational school. The school moved to its current location in 1934. It caters for over 300 pupils. Children aged 4 to 7 are taught in the pre-prep.