Seaton (SA)

Seaton 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 Seaton (SA) is around 11,630, reflecting an increase of 753 people since the 2021 Census. The 2021 Census reported a population of 10,877 in the suburb. This growth was inferred from the resident population estimated by AreaSearch at 11,128 following examination of the latest ERP data release by the ABS in June 2024, along with an additional 153 validated new addresses since the Census date. The population density ratio is 2,533 persons per square kilometer, placing Seaton in the upper quartile relative to national locations assessed by AreaSearch. The suburb's 6.9% growth since the census positions it within 2.1 percentage points of the state (9.0%), indicating competitive growth fundamentals. Overseas migration contributed approximately 95.0% of overall population gains in recent periods for the suburb.

AreaSearch adopts 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, the SA State Government's Regional/LGA projections by age category are adopted, released in 2023 and based on 2021 data, with adjustments made using a method of weighted aggregation of population growth from LGA to SA2 levels. Based on aggregated SA2-level projections, the suburb is expected to increase by 977 persons to 2041, reflecting a gain of 6.1% in total over the 17 years. This trend suggests a population increase just below the median of national areas moving forward with demographic trends.

AreaSearch assessment of residential development activity positions Seaton among the top 25% of areas assessed nationwide

AreaSearch analysis of ABS building approval numbers indicates Seaton experienced approximately 79 dwelling approvals annually. From FY21 to FY25, around 396 homes were approved, with an additional 54 in FY26 as of current data. The population growth rate is about 1.4 people per year for each dwelling built over the past five financial years.

This suggests a balanced supply and demand market, supporting stable conditions. New properties are constructed at an average expected cost of $439,000, indicating developers target the premium market segment with higher-end properties. In FY26, there have been approximately $10.9 million in commercial approvals, suggesting balanced commercial development activity.

Compared to Greater Adelaide, Seaton has 17.0% less new development per person but ranks among the 84th percentile nationally for building activity, which has accelerated recently. New development consists of 76.0% standalone homes and 24.0% medium and high-density housing, preserving the area's suburban nature and attracting space-seeking buyers with an average of around 115 people per dwelling approval. According to AreaSearch's latest quarterly estimate, Seaton is projected to grow by approximately 707 residents by 2041. Based on current development patterns, new housing supply should meet demand, offering good conditions for buyers and potentially facilitating further population growth beyond current projections.

Seaton has moderate levels of nearby infrastructure activity, ranking in the 40thth percentile nationally

Changes to local infrastructure significantly impact an area's performance. AreaSearch has identified 26 projects likely to affect the region. Notable projects include Findon Energy Storage Facility, Grange Healthcare Precinct, Gleneagles Reserve Stormwater Management & Reserve Upgrade, and Findon Green Corridor. The following list details those most relevant:.

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

Denotes AI-based impression for illustrative purposes only, not to be taken as definitive under any circumstances. Please follow links and conduct other investigations from the project's source for actual imagery. Developers and project owners wishing us to use original imagery please Contact Us and we will do so.

Employment performance in Seaton has been broadly consistent with national averages

Seaton's workforce comprises skilled individuals with notable representation in essential services sectors. The unemployment rate stood at 4.0% as of September 2025. This rate is slightly higher than Greater Adelaide's 3.9%.

Employment growth over the past year was estimated at 4.6%, based on AreaSearch data aggregation from statistical areas. In September 2025, 5,909 residents were employed in Seaton. Workforce participation was broadly similar to Greater Adelaide's rate of 66.4%. However, a low 8.2% of residents worked from home, although Covid-19 lockdown impacts should be considered.

Dominant employment sectors among residents include health care & social assistance, retail trade, and construction. Seaton demonstrates a particularly notable concentration in transport, postal & warehousing, with employment levels at 1.6 times the regional average. Conversely, professional & technical services employed only 5.6% of local workers, lower than Greater Adelaide's 7.3%. The predominantly residential area appears to offer limited local employment opportunities, as indicated by the count of Census working population versus resident population. During the year to September 2025, employment levels increased by 4.6%, and labour force grew by 4.3% in Seaton, causing the unemployment rate to fall by 0.3 percentage points. In comparison, Greater Adelaide saw employment rise by 3.0%, labour force grow by 2.9%, and unemployment fall by 0.1 percentage points. Jobs and Skills Australia's national employment forecasts from May-25 offer insight into potential future demand within Seaton. Applying these industry-specific projections to Seaton's employment mix suggests local employment should increase by 6.4% over five years and 13.4% over ten years, assuming constant population growth for illustrative purposes.

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

As per AreaSearch's latest postcode level ATO data released for financial year ended June 2023, Seaton's median income among taxpayers is $50,884. The average income in Seaton is $64,773. Nationally, the median income is higher at $61,099 and the average is $82,274. In Greater Adelaide, the median income is $54,808 and the average is $66,852. Based on Wage Price Index growth of 8.8% since financial year ended June 2023, current estimates for Seaton would be approximately $55,362 (median) and $70,473 (average) as of September 2025. According to Census 2021 income data, incomes in Seaton fall between the 20th and 27th percentiles nationally. The most common income bracket in Seaton is $1,500 - 2,999, with 30.3% of residents (3,523 people). This trend is consistent across the surrounding region, where 31.8% fall within the same category. 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

The dwelling structure in Seaton, 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 at 31.4%, similar to Adelaide metro's figure. The remaining dwellings were either mortgaged (31.5%) or rented (37.1%). The median monthly mortgage repayment in Seaton was $1,700, higher than the Adelaide metro average of $1,562. The median weekly rent in Seaton was $310, lower than the national figure of $375 but slightly higher than Adelaide metro's $320. Nationally, Seaton's mortgage repayments were below the Australian average of $1,863.

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

Family households constitute 63.1 percent of all households, including 24.7 percent couples with children, 23.1 percent couples without children, and 13.9 percent single parent families. Non-family households account for the remaining 36.9 percent, with lone person households at 33.3 percent and group households comprising 3.5 percent of the total. 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

In Seaton Trail region, as of the latest data point, 22.0% of residents aged 15 and above possess university degrees, compared to Australia's 30.4%. This indicates a potential for educational development and skill enhancement in the region. University qualifications are led by bachelor degrees at 16.1%, followed by postgraduate qualifications at 4.2% and graduate diplomas at 1.7%. Vocational credentials are prominent, with 33.2% of residents aged 15 and above holding them - advanced diplomas at 9.5% and certificates at 23.7%.

A significant 24.7% of the population is actively engaged in formal education. This includes 8.5% in primary education, 5.9% in secondary education, and 4.8% pursuing tertiary education.

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

The analysis of public transportation in Seaton shows that there are currently 50 operational transport stops serving the area. These stops offer a mix of train and bus services. There are 22 different routes operating in total, providing a combined weekly passenger trip count of 1,584. The accessibility of these transport services is rated as good, with residents on average being located just 213 meters from their nearest stop. As Seaton is primarily residential, most inhabitants commute outward to other areas for work or leisure. Despite this, the car remains the dominant mode of transportation in the area, used by 89% of residents.

This is reflected in the average vehicle ownership rate of 1.2 per dwelling, which is lower than the regional average. According to the 2021 Census data, a relatively low percentage of Seaton's residents work from home, at just 8.2%. This figure may be influenced by the ongoing COVID-19 conditions. The service frequency across all routes averages out to 226 trips per day, which translates 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 (~6,118 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 declare 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 (2,442 people), which is higher than the 19.3% 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 had a higher cultural diversity than most local markets, with 30.6% of its population born overseas and 31.2% speaking a language other than English at home. Christianity was the predominant religion in Seaton, comprising 56.5% of its population. The category 'Other' was overrepresented in Seaton compared to Greater Adelaide, making up 2.6% versus 1.8%.

In terms of ancestry, the top three groups were English (20.1%), Australian (18.6%), and Italian (16.4%). Notably, English ancestry was lower than the regional average of 27.8%, while Italian ancestry was substantially higher than the regional average of 5.2%. Certain ethnic groups showed significant differences in representation: Serbian at 1.9% versus 0.4%, Polish at 1.3% versus 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 average of 38 years. The 25-34 age group constitutes 16.0% of the population in Seaton, which is higher compared to Greater Adelaide. However, the 15-24 age cohort makes up only 10.5% of the population, which is less prevalent than in Greater Adelaide. According to data from the 2021 Census, the 35-44 age group has increased from 12.5% to 14.5% of the population. Conversely, the 45-54 age cohort has decreased from 12.3% to 11.1%. Population forecasts for 2041 indicate significant demographic changes in Seaton. Notably, the 75-84 age group is projected to grow by 34%, reaching 1,220 people from 907. The combined 65+ age groups are expected to account for 67% of total population growth, reflecting Seaton's aging demographic profile. In contrast, the 0-4 and 25-34 age cohorts are anticipated to experience population declines.