Hyde Abbey School was a British independent school in Winchester, Hampshire, UK. The school was founded by the Reverend Reynell Cotton in around 1760. Cotton was succeeded as headmaster by his son-in-law, the Reverend . In 1795, Sir John Soane constructed a dedicated schoolroom for the school – his only building in Winchester. By 1847, the school had closed and its building was taken on a lease as the first Hampshire Museum.