Baulkham Hills (NSW)

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According to investigations of ABS demographic statistics for the surrounding region, as well as validated address listings from Districts since the Census, the suburb of Baulkham Hills has an estimated population of 37,841 as of May 2026. This represents a growth of 426 residents (1.1%) relative to the 2021 Census, which documented a population of 37,415 people. The adjustment is derived from the resident population of 37,404, which Districts calculated using the most recent ABS ERP release (June 2025) along with 216 validated new addresses registered since the Census date. This population size corresponds to a density of 2,778 persons per square kilometer, placing the locality in the top quartile of countrywide areas analyzed by Districts. Growth in the suburb of Baulkham Hills was driven mostly by overseas migration, which accounted for roughly 89.0% of the total demographic increase in recent times.

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Local workforce data compiled by Districts indicates that the area features a highly educated labor pool with significant representation in professional services, an unemployment rate of just 3.5%, and stable employment conditions over the preceding year. As of March 2026, there are 19,704 residents employed, with an unemployment rate 0.6% below the Greater Sydney average of 4.1%, and a labor participation rate similar to Greater Sydney's 69.1%. Census responses indicate that a high 52.5% of workers worked from home, though this figure should be interpreted alongside COVID-19 lockdown restrictions.

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According to the latest postcode level ATO statistics released for the financial year 2023, the median taxpayer income is $60,846, with an average taxpayer income of $79,820. These figures rank among the highest in the country, comparing to a median of $60,817 and an average of $83,003 across Greater Sydney. Adjusting for a Wage Price Index growth of 10.32% since financial year 2023 yields updated estimates of approximately $67,125 for the median and $88,057 for the average as of March 2026. Census findings place household, family, and individual incomes high nationally, falling between the 76th and 90th percentiles. The weekly income band of $1,500 - 2,999 is the most common, accounting for 30.9% of residents (11,692 people), mirroring the regional rate of . Higher earners are prominent, with earning more than weekly, which points to substantial household purchasing power. High housing costs demand of total income, but solid earnings keep disposable income in the th percentile, and the local SEIFA ranking for income sits in the th decile.

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The local housing profile at the time of the latest Census consisted of 75.4% separate houses and 24.6% other housing types (including townhouses, apartments, and alternative dwellings), compared to the metropolitan Sydney split of 55.9% houses and 44.1% other dwellings. Home ownership rates were higher than the Sydney metro average, standing at 33.3%, while the remaining properties were mortgaged (43.9%) or rented (22.8%). The median monthly mortgage payment was higher than the Sydney metro average at $2,600, while the median weekly rent was $520, compared to metropolitan Sydney figures of $2,427 and $470. On a national level, mortgage repayments are higher than the Australian average of $1,863, and rent prices are above the national average of $375.

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Families make up the majority of households at 83.0%, consisting of 49.8% couples with children, 23.1% couples without children, and 9.5% single parent households. Non-family households represent the remaining 17.0%, with single person households accounting for 15.3% and group housing making up 1.6%. The median household size of 3.0 individuals is larger than the Greater Sydney average of 2.7.

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Qualifications among residents are higher than broader averages, with 44.3% of individuals aged 15+ holding a university degree, compared to 30.4% nationwide and 32.2% across NSW. This educational trend positions the area well for professional and knowledge-based career opportunities. Bachelor degrees are the most common at 27.5%, followed by postgraduate qualifications (14.0%) and graduate diplomas (2.8%). Vocational and technical training is also well represented, with 26.7% of residents aged 15+ holding trade credentials, consisting of advanced diplomas (11.0%) and certificates (15.7%).

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An analysis of public transit options indicates that 287 transit stops are active in the suburb of Baulkham Hills, consisting of bus services. These stops support 150 unique routes, which combine to deliver 9,648 passenger trips per week. Transit access is rated as excellent, with residents living an average of 147 meters from their nearest stop. Because this is a residential suburb, most workers commute out of the area; private cars remain the main mode of travel at 84%, while 8% use buses. The average household has 1.5 vehicles, which is higher than the regional average. A high proportion of residents, 52.5%, work from home (based on the 2021 Census, which may have been influenced by COVID-19 conditions).

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Health assessments indicate excellent physical wellbeing outcomes across the area, based on mortality rates and chronic condition analyses, with younger demographics showing a very low incidence of common medical conditions, and private health insurance rates reaching a high level of approximately 58% of the total population (22,118 people).

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The locality displays high levels of cultural diversity, with 41.9% of residents born outside Australia and 42.9% speaking a non-English language at home. Christianity is the main religion, practiced by 50.2% of the population. Hinduism shows a notable overrepresentation, accounting for 9.3% of the community compared to 5.2% across Greater Sydney.

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The median age of 39 years in the suburb of Baulkham Hills is slightly higher than the Greater Sydney median of 37 and close to the national average of 38. Compared to Greater Sydney, children aged 5 - 14 are overrepresented (15.2% locally), while young adults aged 25 - 34 are underrepresented (8.8%). Post-2021 Census data indicates that the 15 to 24 age bracket grew from 10.9% to 12.7% of the population, whereas the 35 to 44 age bracket declined from 17.5% to 16.6%. Population projections for 2041 indicate demographic changes, with the 85+ cohort expected to grow by 142% ( people) to reach from . General aging trends are projected to continue, with residents aged and older representing of total growth, while the to and to cohorts are expected to decrease in size.

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Baulkham Hills currently has an estimated 1,929 children under 5 years old, comprising approximately 1,127 children aged 0-2 and 749 children aged 3-4. This cohort declined by an estimated 13% since the previous census. while population forecasts indicate future decline, with an anticipated decrease of 6% by 2041 (to approximately 1,822 children). Meanwhile the 5-12 cohort currently amounts to 4,291. Birth rates in the area have averaged 8.7 per 1,000 residents over the latest two-year period, a moderate rate (within the middle tier nationally). This rate has slowed down slightly in recent years however.