South London is the informally defined southern part of London, England, south of the River Thames, which broadly consists of the boroughs of Bexley, Bromley, Croydon, Greenwich, Kingston, Lambeth, Lewisham, Merton, Richmond, Southwark, Sutton, and Wandsworth.
South of London in 1800. The border between Surrey and Kent is shown running south from Deptford, through Sydenham
South London originally emerged from Southwark,[1] first recorded as Suthriganaweorc,[2][3] meaning 'fort of the men of Surrey'.[2][3] From Southwark, London then extended further down into northern Surrey and western Kent.