Seaton (SA)

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Based on analysis of ABS population updates for the broader area, and new addresses validated by Districts since the Census Seaton's population is estimated at around 11,694 as of May 2026. This reflects an increase of 817 people (7.5%) since the 2021 Census, which reported a population of 10,877 people. The change is inferred from the resident population of 11,572, estimated by Districts following examination of the latest ERP data release by the ABS (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 Districts. 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.

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Seaton possesses a skilled workforce, with essential services sectors well represented, an unemployment rate of only 3.1%, and 7.8% in estimated employment growth over the past year, based on Districts aggregation of statistical area data. As of March 2026, 6,180 residents are in work while the unemployment rate is 0.8% below Greater Adelaide's rate of 3.8%, and workforce participation is broadly similar to Greater Adelaide's 66.6%. Based on Census responses, a low 8.2% of residents were found to work from home, though Covid-19 lockdown impacts should be considered.

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Districts' latest postcode level ATO data for financial year 2023 reveals that income in the suburb of Seaton is below the national average, with the median assessed at $50,884 while the average income stands at $64,773. This contrasts to Greater Adelaide's figures of a median income of $54,808 and an average income of $66,852. Based on Wage Price Index growth of 10.17% since financial year 2023, current estimates would be approximately $56,059 (median) and $71,360 (average) as of March 2026. According to 2021 Census figures, household, family and personal incomes in Seaton all fall between the 20th and 27th percentiles nationally. Income brackets indicate the largest segment comprises 30.3% earning $1,500 - 2,999 weekly (3,543 residents), aligning with the surrounding region where this cohort likewise represents . Housing affordability pressures are severe, with only of income remaining, ranking at the th percentile.

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Dwelling structure within Seaton, as evaluated at the latest Census, comprised 66.6% houses and 33.4% other dwellings (semi-detached, apartments, 'other' dwellings), in comparison to Adelaide metro's 75.2% houses and 24.9% other dwellings. Meanwhile, the level of home ownership within Seaton was in line with that of Adelaide metro, at 31.4%, with the remainder of dwellings either mortgaged (31.5%) or rented (37.1%). The median monthly mortgage repayment in the area was above the Adelaide metro average at $1,700, while the median weekly rent figure was recorded at $310, compared to Adelaide metro's $1,562 and $320. Nationally, Seaton's mortgage repayments are lower than the Australian average of $1,863, while rents are substantially below the national figure of $375.

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Family households dominate at 63.1% of all households, comprising 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% of the total. The median household size of 2.3 people is smaller than the Greater Adelaide average of 2.5.

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Educational qualifications in Seaton trail regional benchmarks, with 22.0% of residents aged 15+ holding university degrees compared to 30.4% in Australia. This gap highlights potential for educational development and skills enhancement. Bachelor degrees lead at 16.1%, followed by postgraduate qualifications (4.2%) and graduate diplomas (1.7%). Trade and technical skills feature prominently, with 33.2% of residents aged 15+ holding vocational credentials – advanced diplomas (9.5%) and certificates (23.7%).

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Public transport analysis reveals 50 active transport stops operating within Seaton comprising a mix of train and buses. These stops are serviced by 22 individual routes, collectively providing 1,584 weekly passenger trips. Transport accessibility is rated as good, with residents typically located 213 meters from the nearest transport stop. As a primarily residential area, most residents commute outward - car remains the dominant mode at 89%. Vehicle ownership averages 1.2 per dwelling, below the regional average. A relatively low 8.2% of residents work from home (2021 Census; may reflect COVID-19 conditions).

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Seaton faces significant health challenges, based on Districts' assessment of mortality rates and chronic condition prevalence with prevalence of common health conditions notable across both younger and older age cohorts , and the rate of private health cover just leading that of the average SA2 area at approximately 53% of the total population (~6,152 people).

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Seaton was found to be more culturally diverse than the vast majority of local markets, with 30.6% of its population born overseas and 31.2% speaking a language other than English at home. The main religion in Seaton was found to be Christianity, which makes up 56.5% of people in Seaton. However, the most apparent overrepresentation was in Other, which comprises 2.6% of the population, compared to 1.8% across Greater Adelaide.

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The 40-year median age in Seaton is similar to Greater Adelaide's average of 39 similarly somewhat older than Australia's 38 years. The 25 - 34 age group shows strong representation at 15.9% compared to Greater Adelaide, whereas the 15 - 24 cohort is less prevalent at 10.3%. Post-2021 Census data shows the 35 to 44 age group has grown from 12.5% to 14.3% of the population. Conversely, the 45 to 54 cohort has declined from 12.3% to 11.0%. Population forecasts for 2041 indicate substantial demographic changes for Seaton. Leading the demographic shift, the 75 to 84 group will grow by 36% ( people), reaching from . Notably, the combined + age groups will account for of total population growth, reflecting the area's aging demographic profile. In contrast, the to and to cohorts are expected to experience population declines.

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Seaton currently has an estimated 713 children under 5 years old, comprising approximately 394 children aged 0-2 and 263 children aged 3-4. This cohort grew by an estimated 17% since the previous census. though population forecasts indicate future decline, with an anticipated decrease of 2% by 2041 (to approximately 697 children). Meanwhile the 5-12 cohort currently amounts to 921. While growth has been positive birth rates observed in the area have been moderate, with approximately 10.8 births per 1,000 residents recorded over the latest two-year period analysed which ranks the area within the middle tier nationally.