The Hills Shire (from 1906–2008 as Baulkham Hills Shire) is a local government area in the Greater Sydney region of Sydney, New South Wales, Australia. The suburb is north-west of the Sydney central business district, and encompasses stretching from the M2 Hills Motorway in the south to Wiseman's Ferry on the Hawkesbury River in the north. The Hills Shire had a population of as at the . The current Mayor of The Hills Shire is Dr. Peter Gangemi (Liberal), who was elected on 21 December 2021. Suburbs in the local government area Suburbs at least partially within The Hills Shire are: Annangrove Baulkham Hills (shared with City of Parramatta Council) Beaumont Hills Bella Vista Box Hill Castle Hill (shared with Hornsby Shire) Cattai (shared with City of Hawkesbury) Dural (shared with Hornsby Shire) Gables Glenhaven (shared with Hornsby Shire) Glenorie (shared with Hornsby Shire) Kellyville Kenthurst Leets Vale (shared with City of Hawkesbury) Lower Portland (shared with City of Hawkesbury) Maraylya (shared with City of Hawkesbury) Maroota (shared with Hornsby Shire) Middle Dural (shared with Hornsby Shire) Nelson North Kellyville North Rocks (shared with City of Parramatta Council) Norwest (newly formed) Rouse Hill (shared with City of Blacktown) Sackville North South Maroota West Pennant Hills (shared with Hornsby Shire) Winston Hills (shared with City of Parramatta Council) Wisemans Ferry (shared with Central Coast Council, City of Hawkesbury and Hornsby Shire) Demographics At the , there were people in The Hills local government area; of these 49.3 per cent were male and 50.7 per cent were female. Aboriginal and Torres Strait Islander people made up 0.5 per cent of the population; significantly below the NSW and Australian averages of 2.9 and 2.8 per cent respectively. The median age of people in The Hills Shire was 38 years. Children aged 0 – 14 years made up 21.4 per cent of the population and people aged 65 years and over made up 13.5 per cent of the population. Of people in the area aged 15 years and over, 61.6 per cent were married and 7.1 per cent were either divorced or separated. Population growth in The Hills Shire between the and the was 15.2 per cent; and in the subsequent five years to the , population growth was 6.58 per cent. At the 2016 census, the population in the Shire decreased by 7.43 per cent, brought about by a reduction in the Shire