Harold Wood railway station is on the Great Eastern Main Line in east London, serving Harold Wood in the London Borough of Havering. It is 14 miles 76 chains (24.1 km) down the line from London Liverpool Street and is situated between Gidea Park and Brentwood. Its three-letter station code is HRO and it is in Travelcard zone 6.

Harold Wood is a suburban neighbourhood in East London in the London Borough of Havering. It is situated 16.5 miles (26.6 km) east-northeast of Charing Cross. Harold Wood was part of the ancient parish of Hornchurch, which became the Liberty of Havering. Most of the current area of Harold Wood became part of Hornchurch Urban District in 1926. It is near to the Greater London boundary with Essex.