Bilgola Plateau (NSW)

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According to ABS demographic updates for the surrounding region combined with new address validations performed by Districts after the Census, the suburb of Bilgola Plateau has a population estimated at 3,652 as of May 2026. This represents a minor rise of 2 people (0.1%) from the 2021 Census, which registered 3,650 residents. This shift is calculated from the resident population of 3,652, which Districts estimated using the latest ABS ERP release (June 2025) along with 6 validated new addresses registered since the Census. Such a population size results in a density of 2,627 persons per square kilometer, placing the locality in the highest quartile of all Australian areas evaluated by Districts. The post-census expansion rate of 0.1% in the suburb of Bilgola Plateau is within 2.4 percentage points of the broader SA3 region (2.5%), showing competitive growth indicators. The primary driver of population growth was overseas migration, which accounted for approximately 68.0% of the total population gains in recent times.

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The suburb of Bilgola Plateau has a highly qualified labor force, particularly characterized by strong representation in technology fields, an unemployment rate of just 3.5%, and steady job numbers over the past year, according to statistical area data compiled by Districts. In March 2026, there were 1,962 employed residents, while the local unemployment rate was 0.6% below the Greater Sydney level of 4.1%, and participation in the labor force aligned closely with the metropolitan rate of 69.1%. Census records show that a significant 53.1% of working residents performed their jobs from home, although this figure may be influenced by pandemic-related lockdowns.

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Taxpayer statistics at the postcode level aggregated by Districts for the 2023 financial year show that the suburb of Bilgola Plateau recorded a median taxpayer income of $56,130 and an average of $103,575. This represents a very high level nationally, contrasting with the median income of $60,817 and average income of $83,003 recorded across Greater Sydney. Adjusting for a Wage Price Index increase of 10.32% since the 2023 financial year, current estimates as of March 2026 would be roughly $61,923 for the median and $114,264 for the average. The 2021 Census shows that personal, family, and household incomes in the suburb of Bilgola Plateau are all highly ranked, placing between the 83rd and 95th percentiles nationally. Income bracket analysis shows that the top weekly earnings category of $4000+ is the most common, accounting for 35.0% of residents (1,278 people), whereas the leading group regionally is the $1,500 - 2,999 bracket at 30.9%. High affluence is evident, with 47.2% of residents earning more than $3,000 weekly, which helps sustain premium retail and commercial services. Elevated housing costs account for 15.9% of income, yet high earnings ensure that disposable income remains in the 95th percentile, placing the area in the 10th decile of the SEIFA income index.

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Residential property types in the suburb of Bilgola Plateau at the time of the last Census consisted of 97.8% detached houses and 2.2% other housing styles like semi-detached properties, apartments, or alternative dwellings, compared to the Sydney metropolitan distribution of 55.9% houses and 44.1% other dwellings. Home ownership in the suburb of Bilgola Plateau was considerably higher than the Sydney metro average, standing at 42.4%, with the remaining properties being purchased under a mortgage (47.7%) or occupied by renters (9.9%). The median monthly mortgage payment was well above the Sydney metro average at $3,315, and the median weekly rent was $895, compared to metropolitan figures of $2,427 and $470 respectively. On a national level, mortgage costs in the suburb of Bilgola Plateau are much higher than the Australian average of $1,863, and rents are also well above the national median of $375.

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Families make up the vast majority of households at 86.1%, consisting of couples with children at 44.1%, couples without children at 33.6%, and single parent households at 8.6%. The remaining 13.9% consists of non-family households, which are comprised of single-person households at 12.6% and group living arrangements at 1.1%. The median household size of 2.9 people exceeds the Greater Sydney average of 2.7.

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The proportion of residents with tertiary qualifications in the suburb of Bilgola Plateau is significantly higher than broader averages, with 40.9% of those aged 15+ holding a university degree, compared to 30.4% in Australia and 32.2% across NSW. This educational lead positions the community well for professional services and knowledge sector roles. Bachelor degrees are the most common higher qualification at 26.9%, followed by postgraduate degrees at 9.9% and graduate diplomas at 4.1%. Vocational and technical skills are also well represented, with 31.7% of residents aged 15+ holding qualifications in these areas, consisting of advanced diplomas (14.7%) and certificates (17.0%).

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Public transport services in the suburb of Bilgola Plateau consist of 20 active bus stops. These stops are served by 10 distinct bus routes, which together provide 275 weekly passenger services. Transport access is highly rated, with residents living an average of 187 meters from their nearest stop. Because this is a residential community, the majority of working residents commute to other areas, with private vehicles remaining the primary mode of travel at 92%. Dwellings have an average of 1.9 motor vehicles, which is higher than the regional average. A significant 53.1% of residents work from home, based on 2021 Census figures that may reflect pandemic conditions.

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Health indicators in the suburb of Bilgola Plateau show excellent results based on Districts assessments of mortality statistics and chronic disease rates, with low occurrences of common health issues across all age groups. Additionally, private health insurance uptake is exceptionally high, covering approximately 68% of the population (2,473 people), compared to 59.9% in Greater Sydney and a national average of 55.7%.

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Cultural diversity measures in the suburb of Bilgola Plateau are above average, with 6.6% of residents speaking a language other than English at home and 27.8% born outside of Australia. Christianity is the primary religion, representing 46.1% of the population. The most prominent religious overrepresentation is among those identifying as Jewish, who make up 0.7% of the population compared to 0.8% across Greater Sydney.

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The median age of 46 years in the suburb of Bilgola Plateau is significantly higher than the Greater Sydney average of 37 and the national median of 38. Compared to metropolitan Sydney, the 65 - 74 age group is highly represented at 13.7%, while young adults aged 25 - 34 are underrepresented at 4.0%. Since the 2021 Census, the 15 to 24 age bracket has increased from 11.1% to 13.3% of the population, and the 75 to 84 cohort has grown from 7.2% to 9.3%. In contrast, the 45 to 54 cohort fell from 15.7% to 13.9%, and the 5 to 14 age group declined from 15.8% to 14.2%. Long-term forecasts for 2041 indicate major demographic shifts, with the cohort aged 85 and over projected to expand by 125 people (114%), rising from 109 to 235. The aging profile is clear, with residents aged 65 and older accounting for 97% of the projected population growth. Conversely, the 55 to 64 and 25 to 34 cohorts are expected to experience absolute declines in population.

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Bilgola Plateau currently has an estimated 146 children under 5 years old, comprising approximately 89 children aged 0-2 and 59 children aged 3-4. This cohort declined by an estimated 5% since the previous census. while population forecasts indicate future decline, with an anticipated decrease of 21% by 2041 (to approximately 116 children). Meanwhile the 5-12 cohort currently amounts to 312. Birth rates in the area have averaged 7.7 per 1,000 residents over the latest two-year period, a low rate (among the bottom 30% of areas assessed nationally). This rate has slowed down slightly in recent years however.