Mitcham Junction is a National Rail station served by Southern and Thameslink trains, and a Tramlink stop. It is in the London Borough of Merton and is in Travelcard Zone 4. The station opened on 1 October 1868 specifically to provide an interchange between the new "South London & Sutton Junction Railway", later re-branded as part of the Portsmouth Line, and the existing "Wimbledon & Croydon Railway". The platforms can accommodate 7 coaches. For longer trains selective door opening is used.