Seaton (SA)

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

The population of the suburb of Seaton (SA) is estimated to be around 11,694 as of May 2026. This reflects an increase of 817 people since the 2021 Census, which reported a population of 10,877 people. The change was inferred from the resident population of 11,572 estimated by AreaSearch following examination of the latest ERP data release by the ABS in June 2025 and an additional 161 validated new addresses since the Census date. This level of population equates to a density ratio of 2,547 persons per square kilometer, placing it in the upper quartile relative to national locations assessed by AreaSearch. Seaton's 7.5% growth since census positions it within 0.5 percentage points of the SA3 area (8.0%), demonstrating competitive growth fundamentals. Population growth for the area was primarily driven by overseas migration that contributed approximately 95.0% of overall population gains during recent periods.

AreaSearch is adopting ABS/Geoscience Australia projections for each SA2 area, as released in 2024 with 2022 as the base year. For any SA2 areas not covered by this data, and for years post-2032, the SA State Government's Regional/LGA projections by age category, released in 2023 and based on 2021 data, are adopted with adjustments made employing a method of weighted aggregation of population growth from LGA to SA2 levels. Moving forward with demographic trends, a population increase just below the median of national areas is expected, with the area expected to increase by 913 persons to 2041 based on aggregated SA2-level projections, reflecting recording a gain of 6.8% in total over the 16 years.

Recent residential development output has been above average within Seaton when compared nationally

Based on AreaSearch analysis of ABS building approval numbers, allocated from statistical area data, Seaton has experienced around 79 dwellings receiving development approval each year. Over the past 5 financial years, between FY21 and FY25, approximately 395 homes were approved, with a further 67 approved in FY26 so far. On average, only 0.6 people have moved to the area for each dwelling built over these years, indicating that supply is meeting or exceeding demand, providing greater buyer choice while supporting potential population growth above projections.

New properties are constructed at an average expected cost of $439,000, suggesting developers target the premium market segment with higher-end properties. This financial year has seen $10.9 million in commercial approvals, indicating balanced commercial development activity. Compared to Greater Adelaide, Seaton has 17.0% less new development per person but ranks among the 84th percentile of areas assessed nationally.

However, building activity has accelerated in recent years. New development consists of 76.0% standalone homes and 24.0% medium and high-density housing, preserving the area's suburban nature with an emphasis on detached housing attracting space-seeking buyers. With around 113 people per dwelling approval, Seaton shows characteristics of a growth area. Looking ahead, based on current development patterns, new housing supply should readily meet demand, offering good conditions for buyers and potentially facilitating population growth beyond current projections. The latest AreaSearch quarterly estimate projects Seaton to grow by approximately 791 residents through to 2041.

Seaton has moderate levels of nearby infrastructure activity, ranking in the 45thth percentile nationally

Area performance is significantly influenced by local infrastructure changes. AreaSearch has identified 26 projects likely to impact the area. Key projects include Grange Healthcare Precinct, Gleneagles Reserve Stormwater Management & Reserve Upgrade, Findon Green Corridor, and Fulham Gardens Shopping Centre Redevelopment. Below is a list of projects most relevant.

Professional plan users can use the search below to filter and access additional projects.

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Employment performance in Seaton exceeds national averages across key labour market indicators

Seaton's workforce is skilled with significant representation in essential services sectors. The unemployment rate was 3.5% as of the past year. Employment grew by an estimated 6.8%.

As of December 2025, 6,068 residents were employed with an unemployment rate of 0.3% below Greater Adelaide's rate of 3.8%. Workforce participation was similar to Greater Adelaide's 66.0%. Only 8.2% of residents worked from home according to Census responses. Dominant employment sectors included health care & social assistance, retail trade, and construction.

Transport, postal & warehousing had notable concentration with levels at 1.6 times the regional average. Professional & technical employed just 5.6% of local workers, below Greater Adelaide's 7.3%. The area offered limited local employment opportunities as indicated by Census data on working population vs resident population. Between December 2024 and December 2025, employment levels increased by 6.8% and labour force grew by 5.8%, reducing the unemployment rate by 0.9 percentage points. In contrast, Greater Adelaide saw employment rise by 4.2%, labour force grow by 3.9%, and unemployment fall by 0.3 percentage points. Jobs and Skills Australia's national employment forecasts from May-25 suggest potential future demand in Seaton. Applying these projections to Seaton's employment mix indicates local employment should increase by 6.4% over five years and 13.4% over ten years, based on simple weighting extrapolation for illustrative purposes.

Income figures position the area below 75% of locations analysed nationally by AreaSearch

The latest postcode level ATO data from AreaSearch, released for the financial year ending June 2023, indicates that the median income among taxpayers in Seaton is $50,884, with an average of $64,773. This is lower than the national average. In comparison, Greater Adelaide has a median income of $54,808 and an average of $66,852. Based on Wage Price Index growth of 10.17% since June 2023, current estimates for Seaton's median income would be approximately $56,059 and the average would be around $71,360 by March 2026. According to Census 2021 data, incomes in Seaton fall between the 20th and 27th percentiles nationally for households, families, and individuals. The income bracket of $1,500 - 2,999 is dominant in Seaton, with 30.3% of residents (3,543 people) falling into this category, which is consistent with broader trends across the surrounding region at 31.8%. Housing affordability pressures are severe in Seaton, with only 81.7% of income remaining after housing costs, ranking at the 18th percentile nationally.

Seaton displays a diverse mix of dwelling types, with a higher proportion of rental properties than the broader region

Seaton's dwelling structure, as per the latest Census, consisted of 66.6% houses and 33.4% other dwellings (semi-detached, apartments, 'other' dwellings). In comparison, Adelaide metro had 75.2% houses and 24.9% other dwellings. Home ownership in Seaton was 31.4%, similar to Adelaide metro's figure. Mortgaged dwellings comprised 31.5% and rented ones were at 37.1%. The median monthly mortgage repayment in Seaton was $1,700, higher than Adelaide metro's average of $1,562. Median weekly rent in Seaton was $310, slightly lower than Adelaide metro's $320. Nationally, Seaton's mortgage repayments were below the Australian average of $1,863, while rents were substantially lower at $375.

Seaton features high concentrations of lone person households, with a lower-than-average median household size

Family households account for 63.1% of all households, including 24.7% couples with children, 23.1% couples without children, and 13.9% single parent families. Non-family households make up the remaining 36.9%, with lone person households at 33.3% and group households comprising 3.5%. The median household size is 2.3 people, which is smaller than the Greater Adelaide average of 2.5.

Educational outcomes in Seaton fall within the lower quartile nationally, indicating opportunities for improvement in qualification attainment

Educational qualifications in Seaton Trail region show that 22.0% of residents aged 15+ have university degrees, compared to Australia's 30.4%. This indicates potential for educational development. Bachelor degrees are most common at 16.1%, followed by postgraduate qualifications (4.2%) and graduate diplomas (1.7%). Vocational credentials are prominent, with 33.2% of residents aged 15+ holding them - advanced diplomas at 9.5% and certificates at 23.7%.

Currently, 24.7% of the population is actively pursuing formal education, including 8.5% in primary, 5.9% in secondary, and 4.8% in tertiary education.

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

Seaton has 50 active public transport stops offering a mix of train and bus services. These stops are served by 22 different routes, collectively facilitating 1,584 weekly passenger trips. Transport accessibility is rated as good with residents typically located 213 meters from the nearest stop. Most residents commute outward due to Seaton's primarily residential nature. Car remains the dominant mode of transport at 89%. Vehicle ownership averages 1.2 per dwelling, below the regional average.

According to the 2021 Census, a relatively low 8.2% of residents work from home, which may reflect COVID-19 conditions. Service frequency averages 226 trips per day across all routes, equating to approximately 31 weekly trips per individual stop.

Health performance in Seaton is lower than average with prevalence of common health conditions notable across both younger and older age cohorts

Seaton faces significant health challenges based on AreaSearch's assessment.

Mortality rates and chronic condition prevalence are notable across both younger and older age cohorts. The rate of private health cover is approximately 53% of the total population (~6,152 people), leading that of the average SA2 area. The most common medical conditions in the area are arthritis and mental health issues, impacting 9.1% and 8.3% of residents respectively. 67.2% of residents declared themselves completely clear of medical ailments, compared to 67.9% across Greater Adelaide. Health outcomes among the working-age population are broadly typical. The area has 21.0% of residents aged 65 and over (2,455 people), which is higher than the 19.2% in Greater Adelaide. Health outcomes among seniors present some challenges, with national rankings broadly in line with the general population.

Seaton was found to be more culturally diverse than the vast majority of local markets in Australia, upon assessment of a range of language and cultural background related metrics

Seaton's population, born overseas, was 30.6%, higher than most local markets. At home, 31.2% spoke languages other than English. Christianity dominated Seaton with 56.5%.

The 'Other' religion category was overrepresented at 2.6%, compared to Greater Adelaide's 1.8%. Top ancestral groups were English (20.1%), Australian (18.6%), and Italian (16.4%). Notably, Serbian (1.9%) was significantly higher than the regional average of 0.4%. Polish was at 1.3% compared to 1.0%, and Greek at 4.7% versus 2.0%.

Seaton's population is slightly older than the national pattern

The median age in Seaton is 40 years, similar to Greater Adelaide's average of 39 years but somewhat older than Australia's median age of 38 years. The 25-34 age group constitutes 15.9% of Seaton's population, higher than Greater Adelaide's percentage, while the 15-24 cohort makes up 10.3%. According to post-2021 Census data, the 35-44 age group has increased from 12.5% to 14.3% of Seaton's population, whereas the 45-54 cohort has decreased from 12.3% to 11.0%. By 2041, population forecasts indicate significant demographic changes in Seaton. The 75-84 age group is projected to grow by 36%, reaching 1,243 people from 912. Notably, the combined 65+ age groups will account for 65% of total population growth, reflecting Seaton's aging demographic profile. Conversely, the 0-4 and 25-34 cohorts are expected to experience population declines.