The A237 is an A road in South London. It runs from the west side of Mitcham Common to Coulsdon. It crosses through 2 London Boroughs which includes the start inside the London Borough of Merton and the ending of the road inside the London Borough of Croydon. The road ends at a busy junction with the A23 which soon carries on to the M23. The road serves 4 mainline stations, Mitcham Junction station (also a Tramlink stop), Hackbridge railway station, Wallington railway station and Coulsdon South railway station.