The London Borough of Waltham Forest (/ˈwɔːlθəm, ˈwɒl-/) is an outer London borough formed in 1965 from the merger of the Essex municipal boroughs of Leyton, Walthamstow and Chingford.
The borough's administrative headquarters are at Waltham Forest Town Hall, which before the merger of the boroughs, was called Walthamstow Town Hall. The population was 278,428 at the 2021 census. Waltham Forest borders five other London boroughs: Enfield to the north-west, Haringey to the west, Hackney to the south-west, Newham to the south-east and Redbridge to the east, as well as the Epping Forest District of Essex to the north.