Hornchurch is a town in east London, in the London Borough of Havering. It is located 15.2 miles (24.5 km) east-northeast of Charing Cross. It comprises a number of shopping streets and a large residential area. It historically formed a large ancient parish in the county of Essex that became the manor and liberty of Havering. The economic history of Hornchurch is underpinned by a shift away from agriculture to other industries with the growing significance of nearby Romford as a market town and centre of administration. As part of the suburban growth of London in the 20th century, Hornchurch significantly expanded and increased in population, becoming an urban district in 1926 and has formed part of Greater London since 1965. It is the location of Queen's Theatre, Havering Sixth Form College and Havering College of Further and Higher Education.

The London Borough of Havering in East London, England, forms part of Outer London. It has a population of 259,552 inhabitants; the principal town is Romford, while other communities are Hornchurch, Upminster, Collier Row and Rainham. The borough is mainly suburban, with large areas of protected open space. Romford is a major retail and night time entertainment centre, and to the south the borough extends into the London Riverside redevelopment area of the Thames Gateway. The name Havering is a reference to the Royal Liberty of Havering which occupied the area for several centuries. The local authority is Havering London Borough Council. It is the easternmost London borough.