Royal Air Force Hornchurch, or more simply RAF Hornchurch, is a former Royal Air Force sector station in the parish of Hornchurch, Essex, located to the southeast of Romford. The airfield was known as Sutton's Farm during the First World War, when it occupied 90 acres (360,000 m2) of the farm of the same name. It was used for the protection of London, being 14 miles (22.5 km) east north-east of Charing Cross.

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.