Silverdale (NSW)

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Analyzing population updates from the ABS alongside address records confirmed by Districts post-Census, the suburb of Silverdale (NSW) has an estimated 6,112 residents as of May 2026. This represents a growth of 1,569 individuals (34.5%) relative to the 2021 Census, which documented a population of 4,543. The adjustment is calculated from an estimated resident population of 6,111, determined by Districts using the ABS June 2025 ERP release and 227 validated new addresses added since the Census. This count translates to a density of 126 persons per square kilometer, indicating low density and capacity for future expansion. The 34.5% expansion rate since the 2021 census outpaced the state average of 7.1% as well as Greater Sydney, positioning the locality as a regional growth leader. Population increases were mostly driven by interstate arrivals, who accounted for roughly 72.0% of the growth, although natural increase and overseas migration also contributed positively.

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The workforce shows a healthy mix of professional and trades occupations, with construction workers representing a notable portion of the labor market, and an unemployment rate of only 1.2% according to statistical area aggregations. As of March 2026, there are 3,500 employed residents. The local unemployment rate sits 2.9% below the Greater Sydney average of 4.1%, while workforce participation is exceptionally high at 77.2% compared to the metropolitan average of 69.1%. Census records show that 28.9% of the working population worked from home, though this figure was likely influenced by pandemic-era lockdowns.

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According to the latest ATO postcode statistics for the 2023 financial year, taxpayers in Silverdale earn a median income of $65,388 and an average of $73,629. These figures exceed national benchmarks and compare to a median of $60,817 and an average of $83,003 in Greater Sydney. Factoring in Wage Price Index growth of 10.32% since the 2023 financial year, current estimates would be approximately $72,136 for the median and $81,228 for the average as of March 2026. Census data places household, family, and individual incomes in the upper brackets, ranging from the 80th to the 93rd percentiles nationwide. The weekly income band of $1,500 - 2,999 is the most common, accounting for 35.9% of residents (2,194 people), matching regional patterns where fall into this bracket. The community shows high affluence, with of residents earning weekly incomes above which helps sustain premium retail and service businesses. High housing costs take up of earnings, yet strong wages keep disposable income levels at the nd percentile, with a SEIFA income decile ranking of .

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At the time of the last Census, the local housing mix consisted of 99.5% standalone houses and 0.5% alternative dwelling types like townhouses or apartments, compared to 55.9% houses and 44.1% other options across the Sydney metropolitan area. Home ownership rates aligned with the metropolitan average at 29.7%, while the remaining homes were mortgaged (60.7%) or occupied by tenants (9.7%). The median monthly mortgage payment was higher than the Sydney average at $2,600, and the median weekly rent was $500, compared to metropolitan averages of $2,427 and $470. On a national level, mortgage costs are significantly higher than the Australian average of $1,863, and weekly rents are well above the national median of $375.

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Families make up 90.2% of local households, consisting of couples with children at 54.6%, couples without children at 27.8%, and single parents at 7.2%. Non-family households account for the remaining 9.8%, with single-person households at 9.4% and shared group households at 0.5%. The median household size of 3.3 people exceeds the Greater Sydney average of 2.7.

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The locality shows lower rates of higher education, with university qualification levels at 14.7%, which is well below the Greater Sydney average of 38.0%. Bachelor degrees are the most common higher qualification at 10.6%, followed by postgraduate degrees at 2.6% and graduate diplomas at 1.5%. Conversely, vocational and technical training is very common, with 44.1% of residents aged 15+ holding trade credentials, consisting of advanced diplomas at 10.0% and certificates at 34.1%.

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Analysis of the local transport network shows 50 active transit stops in Silverdale, consisting of bus services. These stops are connected to 19 different routes, which together provide 209 weekly passenger journeys. Accessibility is favorable, with residents living an average of 263 meters from their nearest transit stop. Given the residential character of the neighborhood, most workers commute out of the area, and private vehicles are the dominant mode of travel for 96% of commuters. Household car ownership averages 2.4 vehicles, which is above the metropolitan average. A significant 28.9% of workers worked from home, according to the 2021 Census, which may reflect pandemic conditions.

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Health indicators are generally positive for the local population. An analysis of mortality rates and chronic illnesses by Districts shows outcomes consistent with national averages, with standard rates of health conditions reported across younger and older demographics. Private health insurance coverage is high, with approximately 56% of the population (~3,423 people) holding policies, compared to 59.9% across Greater Sydney.

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The local population displays lower levels of cultural diversity than the national average, with 89.3% of residents born in Australia, 94.5% holding citizenship, and 91.5% using only English at home. Christianity is the dominant religion, practiced by 70.9% of the population, compared to 49.2% across Greater Sydney.

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The suburb of Silverdale (NSW) has a median age of 34 years, which is lower than the Greater Sydney average of 37 and younger than the Australian median of 38 years. Compared to the wider Sydney area, there is a higher concentration of children aged 5 - 14 (16.1%) and a lower percentage of seniors aged 75 - 84 (2.5%). The population age profile has trended younger since the 2021 Census, with the median age falling 1.2 years from 35 to 34. The 25 to 34 age bracket expanded from 13.4% to 15.2% of the population, and the 5 to 14 cohort grew from 14.9% to 16.1%. Meanwhile, the 45 to group shrank from to , and the to group dropped from to . Population projections for point to shifts in the local makeup, with the to group projected to grow by , adding residents to reach while the to age cohort is expected to decrease by residents.

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Silverdale currently has an estimated 531 children under 5 years old, comprising approximately 309 children aged 0-2 and 207 children aged 3-4. This cohort grew by an estimated 50% since the previous census. while population forecasts indicate future growth, with an anticipated increase of 4% by 2041 (to approximately 551 children). Meanwhile the 5-12 cohort currently amounts to 746. Recent growth has been driven by high birth rates observed in the area, with approximately 17.2 births per 1,000 residents recorded over the latest two-year period analysed which ranks the area among the top 20% of areas assessed nationally.