Stanmore is part of the London Borough of Harrow in Greater London. It is centred 11 miles northwest of Charing Cross, lies on the outskirts of the London urban area and includes Stanmore Hill, one of the highest points of London, at 152 metres high. The district, which developed from the ancient Middlesex parishes of Great and Little Stanmore, lies immediately west of Roman Watling Street and forms the eastern part of the modern London Borough of Harrow.