Mitcham and Morden is a constituency[n 1] in Greater London represented in the House of Commons of the UK Parliament since 1997 by Dame Siobhain McDonagh of the Labour Party.

Between 1974 and 1982 it was represented by Bruce Douglas-Mann who was elected as a Labour MP but defected in 1982 to the Social Democratic Party (SDP).

In the by-election Douglas-Mann triggered in May 1982, during the Falklands War, Angela Rumbold (Con) was elected.

1983–2010: Upon redrawing of most of the local government wards, the London Borough of Merton wards of Colliers Wood, Figge's Marsh, Graveney, Lavender, Longthornton, Lower Morden, Phipps Bridge, Pollards Hill, Ravensbury, and St Helier.

In the middle, the former coaching stop town of Mitcham with its ancient cricket green retains some village-like characteristics and had relatively poor transport connections until the opening of the Tramlink in 2000.