The City of Willoughby is a local government area on the Lower North Shore of Northern Sydney, in the state of New South Wales, Australia. It is located north of the Sydney central business district. It was first proclaimed in October 1865 as the Municipality of North Willoughby. The main commercial centre of the City of Willoughby is Chatswood, home to one of Sydney's suburban skyscraper clusters. Other commercial centres are the suburbs of Willoughby, St Leonards and Artarmon. Willoughby is situated on an elevated plateau, and all of Sydney's television stations broadcast from towers in the area. Within the City of Willoughby is the Royal North Shore Hospital, located at St Leonards, one of Sydney's major hospitals. Suburbs in the local government area Suburbs and Localities in the City of Willoughby are: Heritage listings The City of Willoughby has a number of heritage-listed sites, including: Artarmon, 559 Pacific Highway: Chatswood Reservoirs No. 1 and No. 2 Castle Cove, 14 Cherry Place: Innisfallen Castle and grounds Castlecrag, 375 Edinburgh Road: Buhrich House II Castlecrag, 8 The Barbette: Duncan House (Castlecrag) Castlecrag, 80 The Bulwark: The Glass House (Castlecrag) Castlecrag, 15 The Citadel: Fishwick House Chatswood, 258-260 Mowbray Road: Windsor Gardens (Chatswood) Chatswood, 313-315 Mowbray Road: Hilton (Chatswood) Gore Hill, Pacific Highway: Gore Hill Memorial Cemetery Willoughby, 85-87 Penshurst Street: Laurelbank Willoughby, 2 Small Street: Walter Burley Griffin Incinerator, Willoughby Demographics At the 2016 census, there were people in the Willoughby local government area, of these 48.0% were male and 52.0% were female. Aboriginal and Torres Strait Islander people made up 0.2% of the population. The median age of people in the City of Willoughby was 37 years. Children aged 0 – 14 years made up 19.4% of the population and people aged 65 years and over made up 13.6% of the population. Of people in the area aged 15 years and over, 54.6% were married and 8.2% were either divorced or separated. Population growth in the City of Willoughby between the 2006 Census and the 2011 Census was 5.9%; and in the subsequent five years to the 2016 Census, population growth was 10.3%. When compared with total population growth of Australia for the same periods, being 8.3% and 8.8% respectively, population growth in Willoughby local government area has accelerated faster than the national average. At the 2016 Census, the proportion of residents in Willoughby local government area who stated their