Seaton - Grange

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 18,638 as of May 2026. This shows a 6.5% increase from the 2021 Census figure of 17,501 people. The growth is inferred from ABS data: an estimated resident population of 18,429 in June 2025 and 359 new addresses validated since the Census date. This results in a density ratio of 2,259 persons per square kilometer, higher than national averages according to AreaSearch's assessments. Seaton-Grange's growth rate is close to the state average (7.5%), indicating strong fundamentals. Overseas migration contributed approximately 96.3% of population gains recently.

AreaSearch uses ABS/Geoscience Australia projections for each SA2 area, released in 2024 with a base year of 2022. For areas not covered and years post-2032, the 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. By 2041, Seaton-Grange is projected to increase by 1,589 persons, reflecting a 7.4% total growth over the 16-year period, based on the latest annual ERP population numbers.

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

Seaton - Grange averaged approximately 161 new dwelling approvals annually over the past five financial years, totalling 808 homes. As of FY-26 so far, 153 approvals have been recorded. On average, each constructed dwelling has accommodated around 1.1 new residents yearly between FY-21 and FY-25, indicating a balanced supply and demand in the housing market. The average construction value for new properties was $328,000 during this period.

This financial year has seen $27.9 million in commercial approvals, reflecting steady investment activity in the area. Compared to Greater Adelaide, Seaton - Grange maintains similar construction rates per capita, contributing to regional market stability. The breakdown of new building activity shows 73.0% detached dwellings and 27.0% townhouses or apartments, preserving the area's suburban character with a focus on family homes.

With approximately 106 people per approval, Seaton - Grange is classified as a developing area. According to AreaSearch's latest quarterly estimate, the area is projected to grow by 1,380 residents by 2041. At current development rates, new housing supply should comfortably meet demand, presenting favorable conditions for buyers and potentially supporting population growth beyond current projections.

Seaton - Grange has emerging levels of nearby infrastructure activity, ranking in the 23rdth percentile nationally

Area infrastructure significantly impacts local performance. AreaSearch identified 29 potential impact projects. Key initiatives include Gleneagles Reserve Stormwater Management & Reserve Upgrade, Grange Healthcare Precinct, Seaton Urban Renewal Project, and Fulham Gardens Shopping Centre Redevelopment. Relevant projects are listed below for further detail.

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

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AreaSearch assessment positions Seaton - Grange ahead of most Australian regions for employment performance

Seaton-Grange has a skilled workforce with notable representation in essential services sectors. Its unemployment rate was 3.5% as of December 2021. Over the past year, there was an estimated employment growth of 6.5%.

As of December 2025, 9,649 residents were employed, with an unemployment rate of 3.5%, which is 0.3% lower than Greater Adelaide's rate of 3.8%. Workforce participation in Seaton-Grange was broadly similar to Greater Adelaide's at 66.0%. According to Census responses from 2016, only 10.6% of residents worked from home. The key industries of employment among residents were health care & social assistance, retail trade, and construction.

Seaton-Grange showed strong specialization in transport, postal & warehousing with an employment share of 1.4 times the regional level. However, health care & social assistance had a limited presence with 16.0% employment compared to 17.7% regionally. Over the 12 months to December 2025, employment increased by 6.5% while labour force increased by 5.6%, leading to a fall in unemployment rate of 0.9 percentage points. National employment forecasts from Jobs and Skills Australia, published in May-25, project national employment growth of 6.6% over five years and 13.7% over ten years. Applying these projections to Seaton-Grange's employment mix suggests local employment should increase by 6.5% over five years and 13.5% over ten years.

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

AreaSearch released postcode level ATO data for financial year 2023. Seaton - Grange SA2 had a median income of $56,798 and an average of $71,877 among taxpayers. This was above the national average and compared to Greater Adelaide's median of $54,808 and average of $66,852. Based on Wage Price Index growth from financial year 2023 to March 2026, estimated incomes would be approximately $62,574 (median) and $79,187 (average). Census data showed household, family, and personal incomes ranked modestly in Seaton - Grange, between the 30th and 38th percentiles. Income analysis revealed that 29.3% of locals (5,460 people) fell into the $1,500 - 2,999 category, similar to surrounding regions at 31.8%. Housing affordability pressures were severe, with only 83.7% of income remaining, ranking at the 30th percentile. The area's SEIFA income ranking placed it in the 5th decile.

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

In Seaton - Grange, as per the latest Census evaluation, 64.6% of dwellings were houses while 35.5% consisted of other types such as semi-detached homes, apartments, and 'other' dwellings. In contrast, Adelaide metro had a higher percentage of houses at 75.2%, with other dwellings accounting for 24.9%. Home ownership in Seaton - Grange stood at 35.5%, with mortgaged dwellings at 32.0% and rented ones at 32.5%. The median monthly mortgage repayment was $1,733, surpassing Adelaide metro's average of $1,562. The median weekly rent in Seaton - Grange was recorded at $320, matching Adelaide metro's figure but significantly lower than the national average of $375. Nationally, Seaton - Grange's mortgage repayments were below the Australian average of $1,863.

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

Family households account for 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 make up the remaining 35.2%, with lone person households at 32.2% and group households comprising 3.0%. The median household size is 2.3 people, which is smaller than the Greater Adelaide average of 2.5.

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 Australia's 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 them - advanced diplomas at 10.5% and certificates at 22.0%.

A significant 24.0% of the population is actively engaged in formal education, including 8.4% in primary, 5.7% in secondary, and 5.0% pursuing tertiary education.

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

Seaton-Grange has 86 operational public transport stops, offering a mix of train and bus services. These are served by 38 different routes, collectively facilitating 2,157 weekly passenger trips. Transport accessibility is considered good, with residents typically residing 203 meters from the nearest stop. Primarily residential, most commuters travel outward; cars remain the primary mode at 87%. Vehicle ownership averages 1.2 per dwelling, below the regional average. According to the 2021 Census, only 10.6% of residents work from home, which may reflect COVID-19 conditions.

Service frequency averages 308 trips daily across all routes, equating to approximately 25 weekly trips per individual 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 based on AreaSearch's assessment of mortality rates and chronic condition prevalence. The prevalence of common health conditions is notable across both younger and older age cohorts.

The rate of private health cover is found to be fairly high at approximately 55% of the total population, which totals around 10,232 people. This compares to a rate of 52.7% across Greater Adelaide. The most common medical conditions in the area are arthritis and mental health issues, impacting 9.5% and 8.1% of residents respectively. Meanwhile, 66.8% 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 23.5% of residents aged 65 and over, totaling 4,383 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.

The level of cultural diversity witnessed in Seaton - Grange was found to be above average when compared nationally for a number of language and cultural background related metrics

Seaton-Grange was found to have a higher cultural diversity than most nearby areas, with 27.6% of its population born overseas and 24.5% speaking languages other than English at home. Christianity is the predominant religion in Seaton-Grange, making up 55.4% of its population. Notably, the category 'Other' comprises 1.9% of Seaton-Grange's population, slightly higher than the Greater Adelaide average of 1.8%.

The top three ancestry groups are English (23.4%), Australian (20.6%), and Italian (12.8%), with Italians being significantly more represented compared to the regional average of 5.2%. Some other ethnic groups also show notable differences: Serbian at 1.4% (regional average: 0.4%), Polish at 1.3% (regional average: 1.0%), and Greek at 4.2% (regional average: 2.0%).

Seaton - Grange's median age exceeds the national pattern

The median age in Seaton - Grange is 43 years, significantly higher than Greater Adelaide's average of 39 years and Australia's median age of 38 years. Compared to Greater Adelaide, Seaton - Grange has a higher proportion of residents aged 65-74 (11.6%) but fewer residents aged 15-24 (9.8%). According to the 2021 Census, the population aged 35-44 grew from 12.2% to 14.0%, while the 45-54 age group declined from 12.4% to 11.1%. By 2041, demographic projections show significant shifts in Seaton - Grange's age structure. The 75-84 age group is projected to grow by 37%, reaching 2,150 people from 1,569. Notably, the combined age groups of 65 and above will account for 67% 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.