Clapham was a borough constituency in South London which returned one Member of Parliament (MP) to the House of Commons of the UK Parliament. It was created in time for the 1885 general election then altered in periodic national boundary reviews, principally in 1918, and abolished before the February 1974 general election. In its early years (until 1918) the seat was officially named Battersea and Clapham Parliamentary Borough: No. 2—The Clapham Division.

1885–1918: In 1885 the constituency was established as one of two divisions of a new parliamentary borough to be named Battersea and Clapham, in the northern part of the historic county of Surrey.

The Redistribution of Seats Act 1885 provided the constituency, carved out of a corner of East Surrey, was to consist of:

No. 2—The Clapham Division.

• The Parish of Clapham,
• No. 1 Ward of Battersea Parish, and
• No. 4 Ward of Battersea Parish, except so much as is comprised in Division No. 1 as herein described.
  — Redistribution of Seats Act 1885^[1]

1918–1950: In the redistribution of 1918 the seat was altered to remove half of the wards which constituted Battersea (into a new seat of Battersea South) and to instead consist of the local government wards of Clapham North and Clapham South, together with a part of Balham. As a matter of strict nomenclature it became a division of Wandsworth 'parliamentary borough'.

Local government bodies

In 1889 the area was among many square miles severed from Surrey to become part of a new county, the County of London. In 1900 the lower rung of local government in London was reorganised. The constituency became part of the Metropolitan Borough of Wandsworth.

In 1965 the area as it then stood for the purposes of local government became almost wholly part of the London Borough of Lambeth and of Greater London.