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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.

Emerson Park is named after Emerson, the eldest son of William Carter of Parkstone, Dorset who bought land in the area for property development in 1895. Prior to suburban housebuilding, it was the manor of Nelmes which was recorded as Elmes in 1333.