Emerson Park is a suburban neighbourhood in the London Borough of Havering, east London. The neighbourhood developed as two large housing estates built on the 550 acres (2.2 km2) estate of Nelmes manor in the parish of Hornchurch. Emerson Park estate to the south started construction in 1895 and Great Nelmes estate to the north was begun in 1901. It is located north of the Romford–Upminster line and a station opened at Emerson Park in 1909. The mansion of Nelmes survived until it was demolished in 1967 to avoid preservation by the Civic Amenities Act and was replaced with a small housing estate called The Witherings. Emerson Park is located 15 miles (24.1 km) northeast of Charing Cross in Central London.

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.