Harold Hill is a suburban area in the London Borough of Havering, East London. 16.6 miles (26.7 km) 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 London Plan is the statutory spatial development strategy for the Greater London area in the United Kingdom that is written by the Mayor of London and published by the Greater London Authority. It is updated from time to time.