Sanderstead is a village and medieval-founded church parish at the southern end of Croydon in south London, England, within the London Borough of Croydon, and formerly in the historic county of Surrey, until 1965. It takes in Purley Downs and Sanderstead Plantation, an area of woodland that includes the second-highest point in London. Sanderstead sits above a dry valley at the edge of the built-up area of Greater London. Cementing its secular identity from the late 19th century until abolition in 1965 it had a civil parish council. The community had a smaller farming-centred economy until the mid 19th century.

The London Borough of Croydon is a London borough in south London, part of Outer London. It covers an area of 87 km2 (33.6 sq mi). It is the southernmost borough of London. At its centre is the historic town of Croydon from which the borough takes its name; while other urban centres include Coulsdon, Purley, South Norwood, Norbury, New Addington, Selsdon and Thornton Heath. Croydon is mentioned in Domesday Book, and from a small market town has expanded into one of the most populous areas on the fringe of London. The borough is now one of London's leading business, financial and cultural centres, and its influence in entertainment and the arts contribute to its status as a major metropolitan centre. Its population is 390,719, making it the largest London borough and sixteenth largest English district.