Streatham is a borough constituency represented in the House of Commons of the Parliament of the United Kingdom

Parliament of the United Kingdom

The Parliament of the United Kingdom of Great Britain and Northern Ireland is the supreme legislative body in the United Kingdom, British Crown dependencies and British overseas territories, located in London...

. It elects one Member of Parliament

Member of Parliament

A Member of Parliament is a representative of the voters to a :parliament. In many countries with bicameral parliaments, the term applies specifically to members of the lower house, as upper houses often have a different title, such as senate, and thus also have different titles for its members,...

 (MP) by the first past the post system of election.
Streatham is a long, thin constituency running down the western side of the London Borough of Lambeth

London Borough of Lambeth

The London Borough of Lambeth is a London borough in south London, England and forms part of Inner London. The local authority is Lambeth London Borough Council.-Origins:...

. The town of Streatham

Streatham

Streatham is a district in Surrey, England, located in the London Borough of Lambeth. It is situated south of Charing Cross. The area is identified in the London Plan as one of 35 major centres in Greater London.-History:...

 constitutes only the four wards in the southern half of the constituency. At its north-western tip it includes half of Clapham Common

Clapham Common

Clapham Common is an 89 hectare triangular area of grassland situated in south London, England. It was historically common land for the parishes of Battersea and Clapham, but was converted to parkland under the terms of the Metropolitan Commons Act 1878.43 hectares of the common are within the...

, while in the north-east it takes in part of the district of Brixton

Brixton

Brixton is a district in the London Borough of Lambeth in south London, England. It is south south-east of Charing Cross. The area is identified in the London Plan as one of 35 major centres in Greater London....

 which is also split between neighbouring Vauxhall

Vauxhall (UK Parliament constituency)

-Elections in the 1980s:-Elections in the 1970s:-Elections in the 1960s:-Notes and references:...

 and Dulwich and West Norwood.

Following their 2006 review of parliamentary boundaries, the Boundary Commission for England made some minor changes to the Streatham constituency boundaries to bring them into line with Lambeth electoral ward boundaries

The main changes - that took effect from the 2010 election - were to move two areas into Dulwich and West Norwood: streets south of Coldharbour Lane and east of Effra Road; and areas north and east of the Tulse Hill Tavern road junction.