The Hills Shire is a local government area of in the north western region of Sydney, in the state of New South Wales, Australia. The area encompasses 401 square kilometres stretching from North Parramatta in the south to Wiseman's Ferry on the Hawkesbury River in the north.The Mayor of The Hills Shire is Cr. Dr. Michelle Byrne, a member of the Liberal Party.Suburbs in the local government areaSuburbs at least partially within The Hills Shire are:DemographicsAt the 2011 Census, there were people in The Hills local government area, of these 49.4% were male and 50.6% were female. Aboriginal and Torres Strait Islander people made up 0.4% of the population. The median age of people in The Hills Shire was 38 years. Children aged 0 – 14 years made up 21.4% of the population and people aged 65 years and over made up 11.6% of the population. Of people in the area aged 15 years and over, 61.1% were married and 7.2% were either divorced or separated.Population growth in The Hills Shire between the 2001 Census and the 2006 Census was 15.2%; and in the subsequent five years to the 2011 Census, population growth was 6.58%. When compared with total population growth of Australia for the same periods, being 5.78% and 8.32% respectively, population growth in The Hills local government area was nearly double the national average. The median weekly income for residents within The Hills Shire was approximately 150% higher than the national average.