Royal Russell School (before 1962, the Royal Warehousemen Clerks and Drapers' Schools; before 1953, the Warehousemen Clerks and Drapers' Schools; before 1895, the Warehousemen and Clerks' Schools for Orphan and Necessitous Children) is an independent school in the Shirley area of Croydon, South London. It is a co-educational day and boarding school. The motto of the school is Non sibi sed omnibus meaning "Not for one's self but for all". The school is a member of the Headmasters' and Headmistresses' Conference. The patron of the school was Queen Elizabeth II.

There are 1225 pupils at the Royal Russell School, aged between 3 and 19. The school occupies a site of over 100 acres (0.40 km²) in gardens in a wooded estate two miles south-east of Croydon. The School moved the boys' part of the school from Russell Hill in Purley to the Ballards site in 1924, then moving the girls' section of the school completely to the Ballards site in 1961, and selling the original school site on Russell Hill in Purley in 1961. The Junior and Lower Junior schools are in separate buildings from the Senior School, but are on the same site.