Bethnal Green South West was a constituency in London. It returned one Member of Parliament (MP) to the House of Commons of the Parliament of the United Kingdom.

Bethnal Green is an area in London, England and is located in the London Borough of Tower Hamlets. It is in east London and part of the East End. The area emerged from the small settlement which developed around the Green, much of which survives today as Bethnal Green Gardens, beside Cambridge Heath Road. By the 16th century the term applied to a wider rural area, the Hamlet of Bethnal Green, which subsequently became a Parish, then a Metropolitan Borough before merging with neighbouring areas to become the north-western part of the new Tower Hamlets.