Leyton Marsh is an open space in the Lower Lea Valley, located in Leyton in the London Borough of Waltham Forest.

Leyton is a town in East London, England, within the London Borough of Waltham Forest. It borders Walthamstow to the north, Leytonstone to the east, and Stratford to the south, with Clapton, Hackney Wick and Homerton, across the River Lea, to the west. The area includes New Spitalfields Market, Leyton Orient Football Club, as well as part of the Queen Elizabeth Olympic Park. The town consists largely of terraced houses built between 1870 and 1910, interspersed with some modern housing estates. It is 6.2 miles (10 km) north-east of Charing Cross.