Orpington railway station is on the South Eastern Main Line, serving the town of Orpington in the London Borough of Bromley, south-east London. It is 13 miles 65 chains down the line from London Charing Cross and is situated between Petts Wood and Chelsfield stations. It is in Travelcard Zone 6.
The station has eight platforms. Platform 1 is a bay platform which is only occasionally used for Thameslink services. Platform 2 is used for fast services to Charing Cross or Cannon Street . Platforms 3 and 4 are an island, 3 used by trains towards Ashford International or Tunbridge Wells and 4 by stopping services from Sevenoaks to Charing Cross or Cannon Street. Platform 5 hosts the Sevenoaks slows with platforms 6-8 being bay platforms used by services starting at Orpington towards Charing Cross, London Victoria, Cannon Street and Luton/Bedford. At the country end, the four tracks become two. At the London end there is a four-road sidings, where trains are stabled and cleaned.