Leyton and Wanstead is a constituency[n 1] in Greater London created in 1997 and represented in the House of Commons of the UK Parliament since 2024 by Calvin Bailey of the Labour Party.

[n 2] The seat arose from the enacting of the recommendations of the fourth periodic review of Westminster constituencies of the Boundary Commission for England to take account of demographic population change and seek to equalise electorates whilst in preference retaining the historic connections with the local authorities of the United Kingdom.

The constituency has consistently elected Labour Party MPs (Members of Parliament); the narrowest winning majority was 16%; the greatest, 49%, in 2017.

[4] Uniting for general elections areas from the boroughs of Redbridge and Waltham Forest in inner north-east London, the constituency covers Leyton, Wanstead & Leytonstone.

2024–present: The London Borough of Redbridge wards of South Woodford, Wanstead Park, and Wanstead Village; and the London Borough of Waltham Forest wards of Cann Hall, Cathall, Forest, Grove Green, Hoe Street (part), Leyton (part), and Leytonstone.