Riddlesdown is a place in the London Borough of Croydon, one mile east from the centre of its post town of Purley.

The name applies to the residential district and to the green space maintained by the City of London Corporation which is also known as Riddlesdown Common.

[1] The "Riddle" part of the name is thought to come from the Middle English ridde leah, meaning "cleared woodland".

[2] The Riddlesdown Lawn Tennis Club was opened by Fred Perry in June 1938.

Close to the station on Lower Barn Road is also a local post office, hairdressing salon and pharmacy.