Harold Hill is a suburban area in the London Borough of Havering, East London. northeast of Charing Cross. It is a district centre in the London Plan. The name refers to King Harold II, who held the manor of Havering-atte-Bower, and who was killed at the Battle of Hastings in 1066. The suburb is peripheral to London, forming an eastern edge of the urban sprawl.
The extensive London County Council housing development of Harold Hill was conceived in the Greater London Plan of 1944 in order to alleviate housing shortages in Inner London. Before construction of the estate, which was completed in 1958, it was the location of Dagnam Park house and grounds, and in the Municipal Borough of Romford and the county of Essex, but was transferred to Greater London in 1965. The first Greater London Council tenant to buy their council house did so here in 1967. The area is part of a long-term regeneration project led by Havering London Borough Council.