Baulkham Hills sits approximately 30 kilometres north‑west of the Sydney central business district, primarily within The Hills Shire and partially in the City of Parramatta.
The suburb recorded a population of 37,415 at the 2021 census, with a median age of around 38 years, and more than half of the population being Australian-born, alongside communities from China, India, England, South Korea, and Sri Lanka.
English is the dominant language at home (55.6 per cent), while Mandarin, Cantonese, Hindi, Korean and Tamil are also commonly spoken.
The median weekly household income reached $2,474, exceeding the national median.
Transport options include express buses via the M2 Hills Motorway to the Sydney CBD, as well as local routes connecting to Castle Hill, Parramatta, and Norwest.
Public transport use remains modest, with around 3.8 per cent commuting by bus or train, compared to 35.7 per cent driving.
The suburb lacks a train or metro station within its boundaries, though the nearby Metro North West line offers access from Norwest and Bella Vista. Baulkham Hills Junction serves as a key road interchange, connecting Windsor Road, Old Northern Road and Seven Hills Road.
Grove Square is the main shopping centre, featuring Coles, Woolworths, Aldi, and approximately 80 specialty shops.
The Hills Private Hospital, now a rehabilitation and mental health facility, lies on Windsor Road.
Educational facilities include several public and Catholic primary schools, as well as Crestwood and Baulkham Hills High Schools, with the latter being a selective secondary school known for its strong HSC results.
Residents enjoy approximately 300 parks and reserves across the Hills Shire, including Bidjigal Reserve and local bushland corridors, which feature barbecues, playgrounds, and walking trails.
Local wildlife, including koalas, swamp wallabies, and echidnas, is found in these green spaces. Community life benefits from the annual Orange Blossom Festival and HYPE youth events held in the spring. An Alive 90.5 community radio station operates in the suburb.
The blend of family-oriented housing, ample recreational areas, and retail infrastructure, underpinned by solid road and bus links, shapes Baulkham Hills’ suburban character.