Southwark West was a parliamentary constituency centred on the Southwark district of South London.

It returned one Member of Parliament (MP) to the House of Commons of the Parliament of the United Kingdom.

Cohen resigned, causing a by-election.

Causton was appointed a Lord Commissioner of the Treasury, requiring a by-election.

The political parties had been making preparations for an election to take place and by the July 1914, the following candidates had been selected;