Stoneleigh is a suburb of southwest London, occupying most of the northern part of the borough of Epsom and Ewell in Surrey, England, with a population of almost 9,000 residents. It is situated from the centre of London with a few streets in the London Borough of Sutton. In the traditional parish system it was part of Ewell and Cuddington until the building of its church, St John the Baptist, in 1939.