Southwark South East was a parliamentary constituency in the Metropolitan Borough of Southwark, in South London. It returned one Member of Parliament (MP) to the House of Commons of the Parliament of the United Kingdom.

The Metropolitan Borough of Southwark was a metropolitan borough in the County of London from 1900 to 1965. It was created to cover the western section of the ancient borough of Southwark and the parish of Newington. In common with the rest of inner London, the borough experienced a steady decline in population throughout its existence. The borough council made an unsuccessful attempt to gain city status in 1955. Its former area is now the northwestern part of the current London Borough of Southwark.