Allambie Heights (NSW)

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Analysis of ABS demographic updates and new address validations performed by Districts since the Census indicates the suburb of Allambie Heights has an estimated population of 7,316 as of May 2026. This represents a drop of 1 people (0.0%) from the 7,317 residents recorded in the 2021 Census. This adjustment is based on a resident population of 7,287, calculated by Districts using the latest ABS ERP release (June 2025) plus an additional 27 validated new addresses identified since the Census. With these figures, the suburb of Allambie Heights exhibits a population density of 1,096 persons per square kilometer, which aligns closely with typical averages recorded across sites monitored by Districts. Recent population expansion was driven predominantly by overseas migration, which accounted for roughly 95.0% of the overall population growth.

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Districts aggregations of statistical area data show that Allambie Heights possesses a highly qualified workforce, a strong concentration of professionals, a low unemployment rate of 3.6%, and stable job conditions over the past year. In March 2026, employed residents numbered 4,005, with the unemployment rate tracking 0.5% lower than the 4.1% rate seen in Greater Sydney. Workforce participation is virtually equal to the Greater Sydney level of 69.1%. Census records indicate that 50.5% of working residents operated from home, though this figure likely reflects the influence of Covid-19 lockdowns.

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Tax data from the ATO aggregated by Districts for financial year 2023 ranks the income level of Allambie Heights in the highest national percentile. Taxpayers in the suburb record a median income of $60,414 and an average income of $111,469, compared to median and average figures of $60,817 and $83,003 in Greater Sydney. Factoring in Wage Price Index growth of 10.32% since financial year 2023, current estimates for March 2026 are approximately $66,649 for the median and $122,973 for the average. In the 2021 Census, household incomes placed in the 95th percentile with a weekly median of $2,890. Looking at earnings distribution, the top bracket of $4000+ weekly income accounts for 35.4% of the population (2,589 individuals), whereas the most common bracket in the wider region is - containing of residents. Affluence is prominent, with of households earning more than weekly, which supports high-end retail and local services. Residents allocate of their income to high housing costs, yet robust earnings keep disposable income levels at the th percentile, and the SEIFA index ranks the area in the th decile for income.

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At the time of the latest Census, residential structures in Allambie Heights consisted of 87.1% separate houses and 12.9% other dwelling formats such as townhouses and apartments, compared to 55.9% houses and 44.1% other dwellings across the Sydney metropolitan area. The rate of home ownership in Allambie Heights stood at 36.9%, which is higher than the Sydney metro average, with remaining households consisting of mortgaged properties (44.0%) and rented homes (19.0%). The median monthly mortgage payment was $3,467, well above the Sydney metro average of $2,427, while the median weekly rent was $600, compared to the Sydney metro average of $470. On a national scale, mortgage commitments in Allambie Heights are much higher than the Australian median of $1,863, and rental costs are substantially above the national average of $375.

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Families make up the vast majority of households at 79.6%, consisting of couples with children at 48.2%, couples without children at 22.8%, and single-parent homes at 8.3%. Non-family living arrangements account for the remaining 20.4%, with single-person households representing 18.9% and group households making up 1.3%. The median household size of 3.0 persons is larger than the Greater Sydney average of 2.7.

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The educational profile of the area is distinct, with university graduation rates at 37.8% among residents aged 15 and over, surpassing both the national average of 30.4% and the NSW average of 32.2%. This underscores the high value placed on tertiary studies. Bachelor degrees are held by 25.5% of residents, followed by postgraduate degrees at 8.8% and graduate diplomas at 3.5%. Vocational and technical qualifications are also common, with 31.3% of residents aged 15 and over holding credentials including advanced diplomas (12.9%) and certificates (18.4%).

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Analysis of local public transport shows 44 active transport stops in Allambie Heights, consisting of bus services. These stops support 50 separate routes, which combine to deliver 2,019 weekly passenger trips. Transport accessibility is rated as excellent, with residents living an average of 151 meters from the nearest stop. The area is primarily residential, and most workers commute to other areas. Private vehicles remain the primary mode of travel at 82%, followed by buses at 7% and walking at 5%. Average vehicle ownership stands at 1.6 per dwelling, higher than the regional average. A total of 50.5% of residents work from home, based on the 2021 Census, which may reflect pandemic-related conditions.

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Health indicators show excellent results in Allambie Heights. Districts evaluations of mortality rates and chronic illness prevalence point to low rates of common health conditions, particularly among younger residents. The percentage of the population with private health insurance is exceptionally high at 71% (5,181 people), compared to 59.9% in Greater Sydney and a national average of 55.7%.

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Compared to most local markets, Allambie Heights displays higher cultural diversity, with 13.3% of the population speaking a non-English language at home and 28.6% born overseas. Christianity is the dominant religion, practiced by 53.3% of the population. The most prominent religious overrepresentation is Judaism, which accounts for 0.4% of residents, compared to 0.8% across Greater Sydney.

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The median age of 43 in Allambie Heights is higher than the Greater Sydney average of 37 and the national average of 38. The 45 - 54 age group is highly represented at 16.9%, whereas the 25 - 34 bracket is smaller at 6.8% compared to Greater Sydney. Since 2021, the 15 to 24 age bracket grew from 11.8% to 15.0% of the population, and the 55 to 64 group increased from 11.1% to 12.2%. In contrast, the 5 to 14 age group declined from 16.1% to 14.4%, and the 35 to cohort decreased from to . Looking toward demographic projections indicate shifts in the local age profile. The to cohort is expected to grow by people (), rising from to . Combined, cohorts aged and over will account for of total population growth, reflecting an aging population structure. Conversely, the to and to brackets are projected to experience declines.

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Allambie Heights currently has an estimated 343 children under 5 years old, comprising approximately 212 children aged 0-2 and 141 children aged 3-4. This cohort declined by an estimated 11% since the previous census. while population forecasts indicate future decline, with an anticipated decrease of 14% by 2041 (to approximately 295 children). Meanwhile the 5-12 cohort currently amounts to 850. Birth rates in the area have averaged 8.6 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.