Seaton - Grange
Statistical Area - sa2

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

Seaton-Grange's population is 18,516 as of November 2025. This reflects a growth of 1,015 people since the 2021 Census, which reported a population of 17,501. The increase is inferred from ABS data showing an estimated resident population of 18,261 in June 2024 and 352 new addresses validated since the Census date. This results in a density ratio of 2,244 persons per square kilometer, higher than the average seen across national locations assessed by AreaSearch. Seaton-Grange's growth rate of 5.8% since the census is within 1.3 percentage points of the state's growth rate of 7.1%, indicating competitive growth fundamentals. Overseas migration contributed approximately 95.0% of overall population gains during recent periods.

AreaSearch uses 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 are adopted with adjustments made using weighted aggregation methods from LGA to SA2 levels. Based on projected demographic shifts, Seaton-Grange is expected to increase by just below the median of national areas, expanding by 1,706 persons to reach a population of 20,227 by 2041, an increase of approximately 7.8% over the 17-year period.

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

Seaton - Grange has averaged approximately 161 new dwelling approvals per year over the past five financial years, totalling 808 homes. As of FY26, 86 approvals have been recorded. Based on an average of 1.1 new residents per year per dwelling constructed between FY21 and FY25, the supply and demand appear well-balanced, contributing to stable market conditions. The average construction value for new properties is $328,000.

In FY26, there have been $27.9 million in commercial approvals, indicating steady commercial investment activity. Compared to Greater Adelaide, Seaton - Grange maintains similar construction rates per person, supporting market stability aligned with regional patterns. New building activity comprises 73.0% detached dwellings and 27.0% townhouses or apartments, sustaining the area's suburban identity with a concentration of family homes suited to buyers seeking space.

The population density stands at around 106 people per approval, reflecting a low-density area. Looking ahead, Seaton - Grange is projected to grow by 1,445 residents by 2041. At current development rates, new housing supply should comfortably meet demand, providing good conditions for buyers and potentially supporting growth beyond current population projections.

Seaton - Grange has moderate levels of nearby infrastructure activity, ranking in the 47thth percentile nationally

Changes in local infrastructure significantly impact an area's performance. AreaSearch has identified 29 projects that may affect the region. Notable ones include Findon Energy Storage Facility, Findon Residential Development, Gleneagles Reserve Stormwater Management & Reserve Upgrade, and Grange Healthcare Precinct. The following list details those likely to be most relevant.

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

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The employment landscape in Seaton - Grange shows performance that lags behind national averages across key labour market indicators

Seaton-Grange has a skilled workforce with prominent representation in essential services sectors. The unemployment rate as of June 2025 was 4.2%, with an estimated employment growth of 3.1% over the past year.

In June 2025, 9,404 residents were employed while the unemployment rate was 0.2% higher than Greater Adelaide's rate of 4.0%. Workforce participation was lower at 58.5%, compared to Greater Adelaide's 61.7%. Key industries for employment among residents are health care & social assistance, retail trade, and construction. The area shows strong specialization in transport, postal & warehousing with an employment share of 1.4 times the regional level.

However, health care & social assistance has limited presence at 16.0% compared to the regional level of 17.7%. Employment opportunities locally appear limited as indicated by the Census working population vs resident population count. Over the 12 months to June 2025, employment increased by 3.1%, while labour force increased by 3.2%, causing the unemployment rate to rise by 0.2 percentage points. By comparison, Greater Adelaide recorded employment growth of 2.1%. Jobs and Skills Australia's national employment forecasts from May 2025 project a 6.6% expansion over five years and 13.7% over ten years for national employment. Applying these projections to Seaton-Grange's employment mix suggests local growth of approximately 6.5% over five years and 13.5% over ten years, based on simple weighting extrapolation for illustrative purposes only.

Income levels align closely with national averages, indicating typical economic conditions for Australian communities according to AreaSearch analysis

AreaSearch's latest postcode level ATO data for financial year 2022 shows Seaton - Grange had a median income among taxpayers of $54,613 and an average of $69,520. This is above the national average. Greater Adelaide's median was $52,592 with an average of $64,886. Based on Wage Price Index growth of 12.83% since financial year 2022, estimates for September 2025 would be approximately $61,620 (median) and $78,439 (average). Census data shows household, family, and personal incomes rank modestly in Seaton - Grange, between the 31st and 38th percentiles. Income analysis reveals that 29.3% of locals (5,425 people) fall into the $1,500 - $2,999 income category, similar to surrounding regions at 31.8%. Housing affordability pressures are severe with only 83.7% of income remaining, ranking at the 30th percentile. The area's SEIFA income ranking places it in the 5th decile.

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

Dwelling structure in Seaton-Grange, as per the latest Census, consisted of 64.6% houses and 35.5% other dwellings (semi-detached, apartments, 'other' dwellings). This compares to Adelaide metro's 66.1% houses and 33.9% other dwellings. Home ownership in Seaton-Grange stood at 35.5%, with the rest either mortgaged (32.0%) or rented (32.5%). The median monthly mortgage repayment was $1,733, aligning with Adelaide metro's average. Median weekly rent was $320, compared to Adelaide metro's $325. Nationally, Seaton-Grange's mortgage repayments were lower than the Australian average of $1,863, and rents were substantially below the national figure of $375.

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

Family households constitute 64.8% of all households, including 25.2% couples with children, 26.4% couples without children, and 11.9% single parent families. Non-family households comprise the remaining 35.2%, with lone person households at 32.2% and group households making up 3.0%. The median household size is 2.3 people, which is smaller than the Greater Adelaide average of 2.4.

Educational attainment in Seaton - Grange aligns closely with national averages, showing typical qualification patterns and performance metrics

University qualification levels in Seaton-Grange stand at 26.1%, slightly below the Australian average of 30.4%. Bachelor degrees are most common at 18.3%, followed by postgraduate qualifications (5.4%) and graduate diplomas (2.4%). Vocational credentials are prominent, with 32.5% of residents aged 15+ holding such qualifications - advanced diplomas at 10.5% and certificates at 22.0%.

A significant 24.0% of the population is currently engaged in formal education, including 8.4% in primary, 5.7% in secondary, and 5.0% pursuing tertiary education. The three schools in Seaton-Grange have a combined enrollment of 1,869 students, serving typical Australian school conditions (ICSEA: 1020) with balanced educational opportunities. Education provision is balanced with two primary and one secondary school serving distinct age groups. School places per 100 residents (10.2) are below the regional average (13.6), indicating some students may attend schools in adjacent areas.

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

Seaton-Grange has 87 active public transport stops, offering a mix of train and bus services. These stops are served by 37 individual routes, collectively providing 2,153 weekly passenger trips. Transport accessibility is rated as good, with residents located an average of 202 meters from the nearest stop.

Service frequency averages 307 trips per day across all routes, equating to approximately 24 weekly trips per stop.

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

Seaton - Grange faces significant health challenges with a notable prevalence of common health conditions across both younger and older age cohorts.

The rate of private health cover is very high at approximately 54% of the total population (~10,072 people). The most common medical conditions in the area are arthritis and mental health issues, impacting 9.5% and 8.1% of residents respectively. A total of 66.8% of residents declared themselves completely clear of medical ailments, compared to 68.9% across Greater Adelaide. As of June 2021, the area has 23.2% of residents aged 65 and over (4,290 people), which is higher than the 20.0% in Greater Adelaide. Health outcomes among seniors present some challenges, broadly in line with the general population's health profile.

Seaton - Grange 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-Grange has a higher cultural diversity than most local markets, with 27.6% of its population born overseas and 24.5% speaking a language other than English at home. Christianity is the predominant religion in Seaton-Grange, accounting for 55.4% of the population. Notably, the 'Other' religious category comprises 1.9% of Seaton-Grange's population, slightly higher than the 1.8% regional average.

In terms of ancestry, the top three groups are English (23.4%), Australian (20.6%), and Italian (12.8%). Some ethnic groups show notable differences in representation: Serbian is overrepresented at 1.4%, compared to 1.3% regionally; Polish is slightly underrepresented at 1.3%, versus 1.4%; Greek, however, is more represented at 4.2%, compared to the regional average of 4.7%.

Seaton - Grange hosts an older demographic, ranking in the top quartile nationwide

The median age in Seaton-Grange is 43 years, which is significantly higher than Greater Adelaide's average of 39 years, and considerably older than Australia's median age of 38 years. Compared to Greater Adelaide, Seaton-Grange has a higher proportion of residents aged 65-74 (11.5%) but fewer residents aged 15-24 (9.8%). According to the 2021 Census, the population aged 35-44 grew from 12.2% to 13.8%, while the 45-54 age group declined from 12.4% to 11.3%. By 2041, demographic projections show significant shifts in Seaton-Grange's age structure. The 75-84 age group is projected to grow by 41%, reaching 2,119 people from 1,507. Notably, the combined age groups of 65 and above will account for 65% of total population growth, reflecting the area's aging demographic profile. In contrast, both the 0-4 and 25-34 age groups are projected to decrease in number.