Seacliff Park (SA)

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Analyzing population updates from the ABS for the surrounding region alongside newly validated addresses recorded by Districts since the Census, the suburb of Seacliff Park has an estimated population of approximately 2,700 as of May 2026. This represents a growth of 56 individuals (2.1%) from the 2,644 residents documented in the 2021 Census. This adjustment is derived from a resident count of 2,697, calculated by Districts using the ABS June 2025 release of ERP data combined with 29 validated new addresses confirmed since the Census. This count translates to a density of 1,179 persons per square kilometer, a level that matches typical benchmarks observed in Districts assessments. Growth in the local population was primarily supported by international migration, which accounted for roughly 65.0% of the overall gains in recent times.

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A highly qualified labor force characterizes Seacliff Park, alongside strong representation in essential service fields, a low unemployment rate of 2.4%, and an estimated job growth of 4.8% over the preceding year based on Districts compilations. As of March 2026, 1,566 local citizens are employed, with the unemployment rate tracking 1.4% below the 3.8% recorded across Greater Adelaide. Labor force participation is typical, sitting at 71.0% relative to the Greater Adelaide rate of 66.6%. Census data indicates that a minor share of 11.4% of residents performed their jobs from home, although the influence of Covid-19 restrictions during that period must be kept in mind.

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Taxpayer statistics from the ATO aggregated by Districts for financial year 2023 show that income levels in Seacliff Park exceed the national standard. The median income for local taxpayers is $54,832 and the average is $70,289, contrasting with Greater Adelaide metrics of $54,808 and $66,852. Factoring in Wage Price Index growth of 10.17% since financial year 2023, current estimates would sit around $60,408 for the median and $77,437 for the average as of March 2026. The 2021 Census placed household, family, and individual incomes in Seacliff Park near the 53rd percentile nationally. The data shows that 32.2% of the population, representing 869 residents, earn between $1,500 and $2,999, mirroring the wider metropolitan region where this bracket accounts for of the total. Residents retain of their income for non-housing expenditures, and the local SEIFA index for income places the area in the th decile.

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The residential landscape of Seacliff Park at the time of the latest Census consisted of 83.9% standalone houses and 16.1% alternative housing types, such as townhouses, units, or other options, compared to the wider Adelaide metropolitan distribution of 75.2% houses and 24.9% other dwellings. Furthermore, home ownership in Seacliff Park was substantially higher than the Adelaide metropolitan average, standing at 37.3%, while the remaining properties were either held with a mortgage (41.7%) or occupied by tenants (20.9%). The median monthly home loan repayment of $1,800 was noticeably higher than the metropolitan Adelaide average of $1,562, and the median weekly rent was $370 compared to the metropolitan average of $320. Across the country, mortgage commitments in Seacliff Park are lower than the Australian average of $1,863, and typical rent prices are below the national median of $375.

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Domestic units are predominantly family households, representing 70.4% of the total, which includes 30.4% couples with children, 28.0% couples without children, and 11.2% single parent households. Non-family households account for the remaining 29.6%, consisting of lone occupant households at 26.1% and group living situations at 3.7%. The typical household size of 2.4 residents is slightly below the Greater Adelaide average of 2.5.

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The local educational profile stands out when compared to the broader region, with tertiary qualification rates at 31.4% of citizens aged 15 and above, outperforming both the South Australian average of 25.7% and the SA4 region level of 28.1%, showing a strong focus on tertiary education. Bachelor degrees are the most common at 20.9%, followed by postgraduate degrees at 7.4% and graduate diplomas at 3.1%. Practical and vocational skills are also well represented, with 36.7% of citizens aged 15 and above holding trade certifications, split between advanced diplomas at 12.2% and certificate-level courses at 24.5%.

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Public transit records show 17 operational stops in Seacliff Park, consisting of bus services. These points are connected to 14 distinct routes, which support a total of 1,196 passenger journeys per week. Access to transit is rated as excellent, with typical walking distances to the nearest stop averaging 179 meters. Because the locality is primarily residential, most workers travel to other areas for employment, with private cars remaining the primary travel choice at 87%, followed by rail transit at 8%. Motor vehicle ownership averages 1.5 per household. A minor share of 11.4% of residents work from home, based on 2021 Census data, which may reflect the impact of pandemic conditions.

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An evaluation of health indicators reveals positive outcomes in Seacliff Park, based on Districts analysis of mortality statistics and the prevalence of long-term illnesses, with both younger and older demographic groups showing a low incidence of typical medical issues. Additionally, the rate of private health insurance is high, covering approximately 55% of the population, which equals about 1,478 residents, compared to 52.7% across Greater Adelaide.

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Seacliff Park exhibits above-average cultural diversity, with 11.9% of its residents speaking a language other than English at home and 26.5% born in another country. Christianity is the primary religion, representing 40.6% of local residents. The most noticeable divergence is in the Other religious category, which represents 2.2% of the population, compared to 1.8% across Greater Adelaide.

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The median age of 41 years in Seacliff Park is slightly higher than the Greater Adelaide average of 39 and exceeds the national average of 38. The age distribution shows a high concentration of residents aged 45 to 54, making up 13.4% of the population, while the group aged 25 to 34 is smaller at 12.0% compared to Greater Adelaide. Since 2021, the 15 to 24 age bracket has risen from 10.9% to 12.5% of the population, and the 75 to 84 bracket has increased from 5.7% to 7.2%, whereas the 65 to 74 group has decreased from 12.1% to 10.7%. Projections to point to significant changes in the age structure of Seacliff Park, with the cohort aged and over expected to grow by individuals (), rising from to . In contrast, the groups aged to and to are expected to decrease in size.

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Seacliff Park currently has an estimated 159 children under 5 years old, comprising approximately 82 children aged 0-2 and 55 children aged 3-4. This cohort grew by an estimated 1% since the previous census. though population forecasts indicate future decline, with an anticipated decrease of 3% by 2041 (to approximately 155 children). Meanwhile the 5-12 cohort currently amounts to 262. Birth rates in the area have averaged 10.0 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.