St Clair (SA)

St Clair lies within the top quartile of areas nationally for population growth performance according to AreaSearch analysis of recent, and medium to long-term trends

As of November 2025, St Clair's population is estimated at around 2,714 people. This reflects an increase of 80 individuals since the 2021 Census, which recorded a population of 2,634. The change is inferred from AreaSearch's estimation of the resident population at 2,611 following examination of the latest ERP data release by ABS (June 2024), and an additional 234 validated new addresses since the Census date. This level of population results in a density ratio of 2,887 persons per square kilometer, placing St Clair in the upper quartile relative to national locations assessed by AreaSearch. Over the past decade, from 2015 to 2025, St Clair has demonstrated resilient growth patterns with a compound annual growth rate of 1.9%, outpacing the SA3 area. Population growth for the suburb was primarily driven by overseas migration, contributing approximately 87.0% of overall population gains during recent periods.

AreaSearch is adopting ABS/Geoscience Australia projections for each SA2 area, as 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, based on 2021 data and released in 2023, with adjustments made employing a method of weighted aggregation of population growth from LGA to SA2 levels. Looking at population projections moving forward, an above median population growth is projected for the suburb, expected to increase by 451 persons to reach 3,165 by 2041 based on aggregated SA2-level projections, reflecting an increase of 19.8% in total over the 17 years.

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

Based on AreaSearch analysis of ABS building approval numbers, allocated from statistical area data, St Clair has experienced around 44 dwellings receiving development approval annually. Approximately 220 homes have been approved over the past five financial years, from FY-21 to FY-25, with an additional 19 approved so far in FY-26. On average, about 0.9 people per year have moved to the area for each dwelling built during this period.

This indicates that new supply is keeping pace with or exceeding demand, providing ample buyer choice and creating capacity for population growth beyond current forecasts. The average construction cost value of new homes being built is $320,000, which is under regional levels, suggesting more accessible housing choices for buyers. This financial year has seen $24.3 million in commercial development approvals recorded, indicating steady commercial investment activity in the area. When measured against Greater Adelaide, St Clair shows 92.0% higher construction activity per person, creating greater choice for buyers. However, construction activity has eased recently. This level of activity is significantly above the national average, suggesting robust developer interest in the area.

New building activity in St Clair shows that approximately 31.0% are standalone homes, while around 69.0% are medium and high-density housing. This skew towards compact living offers affordable entry pathways and attracts downsizers, investors, and first-time purchasers. Currently, St Clair reflects a low density area with about 77 people per approval. Future projections estimate that St Clair will add approximately 536 residents by 2041, according to the latest AreaSearch quarterly estimate. At current development rates, new housing supply should comfortably meet demand, providing good conditions for buyers and potentially supporting growth beyond current population projections.

St Clair has very high levels of nearby infrastructure activity, ranking in the top 20% nationally

The performance of a region is significantly impacted by changes in its local infrastructure. AreaSearch has identified five projects that are expected to influence this area. Among these key projects are St Clair Village - Stage 6 & 7, St. James, Kidman Park, Babcock Facility Expansion, and St Clair. The following details those considered most relevant.

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AreaSearch analysis reveals St Clair significantly outperforming the majority of regions assessed nationwide

St Clair has a highly educated workforce with professional services well-represented. Its unemployment rate was 2.7% in the past year, with an estimated employment growth of 3.0%.

As of June 2025, 1,834 residents are employed, and the unemployment rate is 1.3% lower than Greater Adelaide's rate of 4.0%. Workforce participation in St Clair is higher at 77.3%, compared to Greater Adelaide's 61.7%. Leading employment industries include health care & social assistance, retail trade, and public administration & safety. The area specialises in public administration & safety, with an employment share of 1.4 times the regional level.

However, construction is under-represented at 6.1% compared to Greater Adelaide's 8.7%. Employment opportunities locally may be limited, as indicated by the count of Census working population vs resident population. Between June 2024 and June 2025, employment increased by 3.0%, while labour force grew by 3.1%, with unemployment remaining largely unchanged. In contrast, Greater Adelaide experienced employment growth of 2.1% and labour force growth of 2.1%. Jobs and Skills Australia's national employment forecasts from Sep-22 project a 6.6% increase over five years and 13.7% over ten years. Applying these projections to St Clair's employment mix suggests local employment should increase by 6.5% over five years and 13.6% over ten years, though this is a simple weighting extrapolation for illustrative purposes and does not account for localised population projections.

Income metrics indicate excellent economic conditions, with the area achieving higher performance than 75% of national locations assessed by AreaSearch

St Clair has a median taxpayer income of $74,782 and an average income of $83,222, according to the latest postcode level ATO data aggregated by AreaSearch for financial year 2022. Nationally, this is extremely high, contrasting with Greater Adelaide's median income of $52,592 and average income of $64,886. Based on Wage Price Index growth of 12.83% since financial year 2022, current estimates would be approximately $84,377 (median) and $93,899 (average) as of September 2025. According to Census 2021 income data, individual earnings in St Clair stand out at the 83rd percentile nationally ($1,055 weekly). Income analysis reveals that the predominant cohort spans 42.8% of locals (1,161 people) with incomes between $1,500 and $2,999, which is consistent with broader trends across the surrounding region showing 31.8% in the same income category. High housing costs consume 17.8% of income, but strong earnings still place disposable income at the 56th percentile nationally. The area's SEIFA income ranking places it in the 7th decile.

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

The latest Census data shows that in St Clair, 33.5% of dwellings were houses, with the remaining 66.5% being semi-detached homes, apartments, and other types. This is compared to Adelaide metro's figures of 66.1% houses and 33.9% other dwellings. Home ownership in St Clair stood at 11.7%, with mortgaged dwellings making up 47.6% and rented properties accounting for 40.7%. The median monthly mortgage repayment in the area was $1,733, aligning with Adelaide metro's average. The median weekly rent was recorded as $360, compared to Adelaide metro's figures of $1,733 and $325 respectively. Nationally, St Clair's median monthly mortgage repayments were lower than the Australian average of $1,863, while median weekly rents were less than the national figure of $375.

St Clair features high concentrations of group households, with a lower-than-average median household size

Family households constitute 64.6% of all households, including 26.6% couples with children, 24.8% couples without children, and 11.3% single parent families. Non-family households account for the remaining 35.4%, with lone person households at 29.7% and group households comprising 6.1%. The median household size is 2.3 people, which is smaller than the Greater Adelaide average of 2.4.

Educational attainment in St Clair aligns closely with national averages, showing typical qualification patterns and performance metrics

St Clair's residents aged 15+ have a higher university qualification rate of 40.2% compared to South Australia's (SA) 25.7% and the SA3 area's 28.8%. Bachelor degrees are most common at 27.0%, followed by postgraduate qualifications at 9.1% and graduate diplomas at 4.1%. Vocational credentials, including advanced diplomas at 11.0% and certificates at 18.6%, are held by 29.6% of residents aged 15+. Educational participation is high with 29.3% currently enrolled in formal education, comprising 10.1% in tertiary, 7.4% in primary, and 4.4% in secondary education.

Woodville High School and SEDA College SA - St. Clair YMCA Recreation Centre serve a total of 1,177 students. The area's ICSEA score is 980, indicating typical Australian school conditions with balanced educational opportunities. Secondary education dominates with two schools while primary students typically attend schools in adjacent catchments. St Clair functions as an education hub with 43.4 school places per 100 residents, significantly above the regional average of 13.6, attracting students from surrounding communities.

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

The analysis of public transportation in St Clair shows that there are currently twelve active transport stops operating within the area. These stops offer a mix of train and bus services. Eleven individual routes service these stops, collectively facilitating one thousand four hundred ninety-eight weekly passenger trips.

The accessibility of transport is rated as good, with residents typically located two hundred forty-seven meters away from the nearest transport stop. On average, there are two hundred fourteen trips per day across all routes, which equates to approximately one hundred twenty-four weekly trips per individual stop.

St Clair's residents boast exceedingly positive health performance metrics with both young and old age cohorts seeing low prevalence of common health conditions

St Clair's health outcomes show notable results, with both younger and older age groups having low prevalence of common health conditions. The rate of private health cover is exceptionally high at approximately 60% of the total population (1,624 people), compared to 52.8% across Greater Adelaide.

Mental health issues and asthma are the most prevalent medical conditions in the area, affecting 8.0 and 6.2% of residents respectively. A significant majority, 78.7%, report being completely free of medical ailments, compared to 68.9% across Greater Adelaide. St Clair has 8.2% of its population aged 65 and over (222 people), which is lower than the 20.0% in Greater Adelaide. However, health outcomes among seniors require more attention than those of the broader population.

St Clair is among the most culturally diverse areas in the country based on AreaSearch assessment of a range of language and cultural background related metrics

St Clair's cultural diversity is notable with 38.5% of its population born overseas, and 38.0% speaking a language other than English at home. Christianity is the predominant religion in St Clair, comprising 39.1% of people, while Islam is overrepresented at 6.7%, compared to Greater Adelaide's average of 2.8%. The top three ancestry groups are English (18.9%), Australian (16.7%), and Other (15.6%), with the latter being substantially higher than the regional average of 10.1%.

Some ethnic groups show notable divergences: Hungarian at 0.6% (vs regional 0.3%), Serbian at 1.1% (vs 1.3%), and Russian at 0.8% (vs 0.6%).

St Clair hosts a very young demographic, ranking in the bottom 10% of areas nationwide

St Clair's median age is 32 years, which is lower than Greater Adelaide's average of 39 years and Australia's average of 38 years. Compared to Greater Adelaide, St Clair has a higher proportion of residents aged 25-34 (26.4%) but fewer residents aged 65-74 (5.3%). This concentration of 25-34 year-olds is significantly higher than the national average of 14.5%. Between the 2021 Census and the present, the proportion of residents aged 35 to 44 has increased from 18.7% to 19.6%, while the proportion of residents aged 45 to 54 has decreased from 11.2% to 9.7%. The proportion of residents aged 15 to 24 has also dropped, from 13.4% to 12.0%. By 2041, population forecasts indicate substantial demographic changes for St Clair, with the strongest projected growth in the 25 to 34 age group, which is expected to grow by 17%, adding 120 residents and reaching a total of 837.