Harrow on the Hill or Harrow-on-the-Hill is an affluent locality and historic village in the borough of Harrow in Greater London, England. The name refers to Harrow Hill, 408 feet (124Â m), and is located some half a mile south of the modern town of Harrow. The village dates back to early medieval times, built around the 11th-century St Mary's Church, and is the location of Harrow, St Dominic's and John Lyon schools.