[2] The archdiocese has an area of 3,000 km2 (1,200 sq mi) and covers the London Boroughs south of the Thames, the county of Kent and the Medway Unitary Authority.

[2] The Metropolitan See is in Southwark where the archbishop's seat is located at the St George's Cathedral.

The eleventh and current archbishop is John Wilson, who was appointed on 10 June 2019 and was installed on 25 July 2019.

The Diocese of Southwark was created on 29 September 1850 and originally covered the historic counties of Surrey, Berkshire, Hampshire, Kent, Sussex, the Isle of Wight, and the Channel Islands.

The metropolitan archbishop of Southwark has jurisdiction over the bishops of Arundel & Brighton, of Plymouth, and of Portsmouth.