Harrow is a large suburban town in the London Borough of Harrow, northwest London, England. It is centred northwest of Charing Cross. Harrow-on-the-Hill includes the conservation area with a high proportion of listed buildings with a residential and institutional array of Georgian architecture and a few 17th century examples. Harrow gives its initial letters to a wider postcode area. The administrative offices of the borough are in the town which currently is made up of the Greenhill, Headstone South and West Harrow electoral wards; these had a population of 33,928 in the 2011 census. Harrow was a municipal borough of Middlesex before its inclusion in Greater London in 1965. Harrow is home to a large Westminster polytechnic campus and its oldest secondary schools are Harrow School and Harrow High School.

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