Orpington is a town and area in south east London, England, within the London Borough of Bromley. It is 13.4 miles (21.6 km) south east of Charing Cross. On the south-eastern edge of the Greater London Built-up Area, it is south of St Mary Cray, west of Ramsden, north of Goddington and Green Street Green, and east of Crofton and Broom Hill. Orpington is covered by the BR postcode area. It is identified in the London Plan as one of 35 major centres in Greater London.