Chelsfield railway station is in the London Borough of Bromley, and serves the southern parts of the built-up area of Orpington - Chelsfield itself, and Green Street Green. It is in Travelcard Zone 6.
The line on which it is located, and the station itself, was opened on 2 March 1868 by the South Eastern Railway to shorten its route from London to Dover. The building of the route, which crosses the North Downs, was a difficult undertaking, with steep gradients. At Chelsfield the line is rising steadily on a 1 in 120 gradient through the 597yds (543m) Chelsfield Tunnel beyond the station. The modern station building is on the Up side of the line.