Seacliff

Seacliff has seen population growth performance typically on par with national averages when looking at short and medium term trends

As of February 2026, the estimated population of the suburb of Seacliff is around 2,306. This reflects an increase of 189 people since the 2021 Census, which reported a population of 2,117. The current resident population estimate of 2,209 was derived from AreaSearch's examination of the latest ERP data release by the ABS in June 2024 and address validation since the Census date. This results in a population density ratio of 3,158 persons per square kilometer, placing Seacliff in the upper quartile relative to national locations assessed by AreaSearch. The suburb's population growth of 8.9% since the 2021 census exceeded both the SA4 region (7.4%) and the SA3 area, indicating it as a growth leader in the region. Overseas migration was the primary driver of this population increase.

AreaSearch is using ABS/Geoscience Australia projections for each SA2 area, released in 2024 with a base year of 2022. For areas not covered by this data and years post-2032, SA State Government's Regional/LGA projections by age category are adopted, based on 2021 data and adjusted using weighted aggregation from LGA to SA2 levels. Looking ahead, population projections indicate a increase just below the median of statistical areas analysed by AreaSearch, with Seacliff expected to grow by 168 persons to reach an estimated total population of 2,474 by 2041, reflecting an overall increase of 2.0% over the 17-year period.

AreaSearch analysis of residential development drivers sees Seacliff recording a relatively average level of approval activity when compared to local markets analysed countrywide

AreaSearch analysis of ABS building approval numbers, allocated from statistical area data, shows Seacliff has seen around 14 new homes approved annually over the past five financial years. This totals an estimated 72 homes between FY-21 and FY-25. So far in FY-26, 7 approvals have been recorded. On average, 1.7 new residents per year per dwelling constructed were recorded during these years.

This suggests a balanced supply and demand creating stable market conditions. The average value of new homes being built is $713,000, indicating a focus on the premium segment with upmarket properties. In FY-26, $4.5 million in commercial development approvals have been recorded, reflecting the area's residential character.

Relative to Greater Adelaide, Seacliff has similar development levels per person, supporting market stability aligned with regional patterns. New building activity shows 73.0% detached dwellings and 27.0% townhouses or apartments, maintaining the area's suburban identity with a concentration of family homes suitable for buyers seeking space. With around 136 people per dwelling approval, Seacliff exhibits characteristics of a growth area. Latest AreaSearch quarterly estimates project Seacliff to add 46 residents by 2041. Given current construction levels, housing supply should meet demand adequately, creating favourable conditions for buyers and potentially enabling growth beyond current forecasts.

Seacliff has limited levels of nearby infrastructure activity, ranking in the 12thth percentile nationally

No factors affect a region more than alterations to local infrastructure, significant ventures, and planning schemes. AreaSearch has pinpointed 0 projects expected to impact this area. Notable undertakings include Adelaide Public Transport Capacity and Access, Adelaide's Inner And Outer Ring Route Capacity Improvements, North South Corridor, and SA Water Capital Work Delivery Contracts, with the subsequent list outlining those most pertinent.

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Employment conditions in Seacliff demonstrate strong performance, ranking among the top 35% of areas assessed nationally

Seacliff has a highly educated workforce with significant representation in essential services sectors. The unemployment rate was 2.6% as of September 2025, lower than Greater Adelaide's 3.9%. Employment growth over the past year was estimated at 2.7%.

Workforce participation is similar to Greater Adelaide's 66.4%. A moderate 18.7% of residents work from home, though Covid-19 lockdown impacts should be considered. Key industries of employment among residents are health care & social assistance, education & training, and professional & technical services. Employment specialization in education & training is high, at 1.4 times the regional level, while manufacturing employs only 5.5% of local workers, below Greater Adelaide's 7.0%.

The area offers limited employment opportunities locally, as indicated by the count of Census working population versus resident population. In the 12-month period ending September 2025, employment increased by 2.7%, while labour force grew by 3.0%, causing the unemployment rate to rise by 0.3 percentage points. By comparison, Greater Adelaide recorded employment growth of 3.0% and a fall in unemployment of 0.1 percentage points. National employment forecasts from Jobs and Skills Australia, released May-25, project national employment expansion at 6.6% over five years and 13.7% over ten years. Applying these projections to Seacliff's employment mix suggests local employment should increase by 6.9% over five years and 14.2% over ten years.

The area exhibits notably strong income performance, ranking higher than 70% of areas assessed nationally through AreaSearch analysis

The suburb of Seacliff has one of the highest income levels in Australia, according to AreaSearch aggregating latest ATO data for financial year 2023. The median income among taxpayers is $62,396, with an average income of $82,993. These figures compare to Greater Adelaide's median of $54,808 and average of $66,852. Based on Wage Price Index growth of 8.8% since financial year 2023, estimated incomes as of September 2025 would be approximately $67,887 (median) and $90,296 (average). According to the 2021 Census, income levels in Seacliff cluster around the 67th percentile nationally. The predominant income bracket spans 29.7% of locals (684 people), falling within the $1,500 - 2,999 weekly range, consistent with broader regional trends at 31.8%. A substantial presence of higher earners is noted, with 30.2% exceeding $3,000 weekly. After housing costs, residents retain 87.7% of their income, reflecting strong purchasing power within the community. The area's SEIFA income ranking places it in the 8th decile.

Seacliff displays a diverse mix of dwelling types, with above-average rates of outright home ownership

Seacliff's dwelling structures, as per the latest Census, consisted of 66.3% houses and 33.8% other dwellings (semi-detached, apartments, 'other' dwellings). In comparison, Adelaide metro had 75.2% houses and 24.9% other dwellings. Home ownership in Seacliff stood at 41.8%, with the rest being mortgaged (33.5%) or rented (24.6%). The median monthly mortgage repayment was $1,950, higher than Adelaide metro's average of $1,562. Median weekly rent in Seacliff was $350, compared to Adelaide metro's $320. Nationally, Seacliff's mortgage repayments were higher at $1,950 against the Australian average of $1,863, while rents were lower at $350 compared to the national figure of $375.

Seacliff has a typical household mix, with a lower-than-average median household size

Family households account for 72.9% of all households, including 28.7% with couples and children, 34.1% with couples but no children, and 10.1% headed by single parents. Non-family households constitute the remaining 27.1%, with lone person households making up 24.2% and group households comprising 2.4%. The median household size is 2.4 people, lower than Greater Adelaide's average of 2.5.

Seacliff shows strong educational performance, ranking in the upper quartile nationally when assessed across multiple qualification and achievement indicators

Seacliff residents aged 15 and over have a higher proportion with university qualifications at 43.5%, compared to South Australia's 25.7% and the SA4 region's 28.1%. This educational advantage is notable for its potential in knowledge-based opportunities. Bachelor degrees are most common at 27.7%, followed by postgraduate qualifications at 11.4% and graduate diplomas at 4.4%. Vocational credentials are also prominent, with 30.1% of residents holding such qualifications - advanced diplomas at 12.3% and certificates at 17.8%.

Educational participation is high, with 26.1% of residents currently enrolled in formal education. This includes 8.2% in primary education, 6.9% in secondary education, and 6.2% pursuing tertiary education.

Transport servicing is high compared to other areas nationally based on assessment of service frequency, route connectivity and accessibility

Seacliff has 13 active public transport stops offering a mix of train and bus services. These stops are served by 12 different routes, facilitating 1,127 weekly passenger trips in total. The accessibility of transport is rated as excellent, with residents typically living 169 meters from the nearest stop. In this predominantly residential area, most commuters travel outward. Car remains the primary mode of transportation at 84%, while train usage stands at 10%. On average, there are 1.4 vehicles per dwelling.

According to the 2021 Census, 18.7% of residents work from home, which may be influenced by COVID-19 conditions. The service frequency averages 161 trips per day across all routes, translating to approximately 86 weekly trips per individual stop.

Seacliff's residents boast exceedingly positive health performance metrics with very low prevalence of common health conditions across all age groups

Seacliff's health outcomes data shows excellent results based on AreaSearch's assessment of mortality rates and chronic condition prevalence. The area has a very low prevalence of common health conditions across all age groups.

Approximately 60% of Seacliff's total population (1,377 people) has private health cover, compared to Greater Adelaide's 52.7%. The most prevalent medical conditions are arthritis and mental health issues, affecting 9.5% and 7.5% of residents respectively. 67.7% of residents report being completely free from medical ailments, similar to Greater Adelaide's 67.9%. Health outcomes among working-age populations in Seacliff are generally typical. The area has a higher proportion of seniors aged 65 and over at 23.8%, compared to Greater Adelaide's 19.3%. Health outcomes among seniors in Seacliff rank nationally in line with the general population.

In terms of cultural diversity, Seacliff records figures broadly comparable to the national average, as found in AreaSearch's assessment of a number of language and cultural background related metrics

Seacliff's population was found to be roughly comparable to the wider region in terms of cultural diversity, with 76.2% born in Australia, 89.7% being citizens, and 91.9% speaking English only at home. Christianity was identified as the main religion in Seacliff, comprising 41.4% of its population. However, Islam was found to be overrepresented, making up 0.7%, compared to the regional average of 3.0%.

The top three ancestry groups were English (33.7%), Australian (22.5%), and Irish (8.8%). Notably, Polish (1.3%) and Welsh (0.8%) were also overrepresented in Seacliff compared to the regional averages of 1.0% and 0.6%, respectively. Additionally, German ancestry was slightly higher at 5.9%.

Seacliff hosts an older demographic, ranking in the top quartile nationwide

Seacliff's median age is 46 years, notably higher than Greater Adelaide's average of 39 years and Australia's national average of 38 years. The age profile reveals that those aged 65-74 are particularly prominent, comprising 14.9% of the population, which is significantly above both Greater Adelaide's percentage and the national figure of 9.2%. Conversely, the 25-34 age group makes up only 10.2%, considerably smaller than Greater Adelaide's proportion. Between 2021 and present, the 75 to 84 age group has increased from 5.4% to 7.7%, while the 15 to 24 cohort has risen from 9.7% to 11.7%. However, the 55 to 64 age group has decreased from 16.2% to 14.3%. By 2041, population forecasts indicate substantial demographic shifts in Seacliff. The 45 to 54 cohort is projected to grow by 8%, adding 24 residents to reach a total of 329. In contrast, populations aged 0-4 and 55-64 are expected to decline.