Ruislip is a suburb in the London Borough of Hillingdon in West London. Prior to 1965 it was in Middlesex. Ruislip lies 13.8 miles west-north-west of Charing Cross, London. The manor of Ruislip appears in the Domesday Book, and some of the earliest settlements still exist today, designated as local heritage sites. The parish church, St Martin's, dates back to the 13th century and remains in use.