Thornton Heath is a district of south London, England, in the London Borough of Croydon. It is situated 7.2 miles (11.6 km) south-southeast of Charing Cross.
Until the arrival of the railway in 1862, Thornton Heath was focused on an area 1.5 miles (2.4 km) south west of the Whitehorse manor house (now a school), at the locality on the main Sussex road A23 known as Thornton Heath Pond. Between the manor house and pond there was an isolated farmhouse. Eventually it would become the site for the railway station and the main expansion hub.
In the 50-year period 1861–1911, Thornton Heath saw a complete transformation from isolated rural outpost to integrated metropolitan suburb. In its infancy, a new railway station sited in the eastern farmlands enabled that immediate area to evolve around a central point. In the late 19th century, the western part of Thornton Heath, which lay directly on the main London-Sussex road, demonstrated a classic form of suburban ribbon development. In the process, it became the final piece in an urban chain linking two major centres, London and Croydon, completing the greatest metropolitan expansion in the world at that time.
The nearest places are Mitcham, Croydon, South Norwood, Norbury, Pollards Hill, Selhurst, Upper Norwood and Eastfields.