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

Based on analysis of ABS population updates for the broader area, and new addresses validated by AreaSearch since the Census, the suburb of St Clair's population is estimated at around 2,956 as of Feb 2026. This reflects an increase of 322 people (12.2%) since the 2021 Census, which reported a population of 2,634 people. The change is inferred from the resident population of 2,729 estimated by AreaSearch following examination of the latest ERP data release by the ABS in June 2024 and an additional 243 validated new addresses since the Census date. This level of population equates to a density ratio of 3,144 persons per square kilometer, placing it in the upper quartile relative to national locations assessed by AreaSearch. St Clair's 12.2% growth since the 2021 census exceeded the state (9.0%), along with the Greater Adelaide, marking it as a growth leader in the region. Population growth for the area was primarily driven by overseas migration that contributed 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 2022 as the base year. For any SA2 areas not covered by this data, and for years post-2032, the SA State Government's Regional/LGA projections by age category, released in 2023 and based on 2021 data, are adopted with adjustments made employing a method of weighted aggregation of population growth from LGA to SA2 levels. Moving forward with demographic trends, an above median population growth of statistical areas analysed by AreaSearch is projected, with the suburb expected to increase by 456 persons to 2041 based on aggregated SA2-level projections, reflecting an increase of 10.2% in total over the 17 years.

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

St Clair has seen approximately 47 new home approvals annually over the past five financial years, totalling around 237 homes. As of FY-26, 30 approvals have been recorded. On average, 0.9 new residents arrive per year for each new home built between FY-21 and FY-25. The average construction cost value of new dwellings is $320,000.

This financial year has seen $3.5 million in commercial approvals. Compared to Greater Adelaide, St Clair exhibits 106.0% higher building activity per person. New building activity comprises 31.0% detached dwellings and 69.0% medium and high-density housing. St Clair currently reflects around 66 people per approval, indicating a developing area. According to AreaSearch's latest quarterly estimate, St Clair is projected to grow by approximately 300 residents by 2041. At current development rates, new housing supply should comfortably meet demand, offering good conditions for buyers and potentially supporting growth beyond current population projections.

Looking ahead, St Clair is expected to grow by 300 residents through to 2041 (from 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 limited levels of nearby infrastructure activity, ranking in the 18thth percentile nationally

Five projects, as identified by AreaSearch, are expected to influence the local area's performance: St Clair Village - Stage 6 & 7, St. James, Kidman Park, Babcock Facility Expansion, and St Clair. These projects are considered relevant to the area.

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AreaSearch analysis of employment trends sees St Clair performing better than 85% of local markets assessed across Australia

St Clair has an educated workforce with strong professional services representation. The unemployment rate was 2.5% in the past year, with estimated employment growth of 3.9%. As of September 2025, 1,840 residents were employed at a rate of 1.4% lower than Greater Adelaide's 3.9%, and workforce participation was 82.8% compared to Greater Adelaide's 66.4%.

Home workership was low at 11.9%, considering Covid-19 lockdown impacts. Key industries include health care & social assistance, retail trade, and public administration & safety, with specialization in the latter (1.4 times regional level) and underrepresentation in construction (6.1% vs Greater Adelaide's 8.7%). Limited local employment opportunities were indicated by Census data. Between September 2024 to September 2025, employment levels increased by 3.9%, labour force by 3.7%, reducing unemployment by 0.2 percentage points.

In contrast, Greater Adelaide had employment growth of 3.0% and labour force growth of 2.9%, with a 0.1 percentage point drop in unemployment. National employment forecasts from May-25 project growth rates differing significantly between industry sectors. 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 consider localized population projections.

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

The suburb of 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 2023. This is among the highest in Australia, contrasting with Greater Adelaide's median income of $54,808 and average income of $66,852. Based on Wage Price Index growth of 8.8% since financial year 2023, current estimates would be approximately $81,363 (median) and $90,546 (average) as of September 2025. Census data reveals individual earnings stand out at the 83rd percentile nationally with a weekly income of $1,055. Distribution data shows that 42.8% of the population, which consists of 1,265 individuals, fall within the $1,500 - 2,999 income range, consistent with broader trends across the surrounding region showing 31.8% in the same category. High housing costs consume 17.8% of income, however 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

St Clair's dwelling structure, as per the latest Census, consisted of 33.5% houses and 66.5% other dwellings (semi-detached, apartments, 'other' dwellings). In comparison, Adelaide metro had 75.2% houses and 24.9% other dwellings. Home ownership in St Clair was 11.7%, with mortgaged dwellings at 47.6% and rented ones at 40.7%. The median monthly mortgage repayment in St Clair was $1,733, higher than Adelaide metro's average of $1,562. The median weekly rent in St Clair was $360, compared to Adelaide metro's $320. Nationally, St Clair's mortgage repayments were lower than the Australian average of $1,863, and 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 comprise 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 making up 6.1% of the total. The median household size is 2.3 people, which is smaller than the Greater Adelaide average of 2.5.

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

St Clair's educational attainment is notably higher than broader benchmarks. Among residents aged 15+, 40.2% hold university qualifications, compared to 25.7% in South Australia (SA) and 28.8% in SA3 areas. University graduates make up the largest portion at 27.0%, followed by postgraduate qualifications at 9.1% and graduate diplomas at 4.1%. Vocational credentials are also prevalent, with 29.6% of residents aged 15+ holding them, including advanced diplomas (11.0%) and certificates (18.6%).

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.

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

The analysis of public transport in St Clair shows that there are currently 12 active transport stops operating within the area. These stops offer a mix of train and bus services, with a total of 11 individual routes providing service. Collectively, these routes facilitate 1,498 weekly passenger trips. The accessibility of transport in St Clair is rated as good, with residents typically located approximately 247 meters from their nearest transport stop. As a primarily residential area, most residents commute outward for work or other purposes. The car remains the dominant mode of transportation, used by 78% of residents, while train use stands at 12%.

On average, there are 1.1 vehicles per dwelling in St Clair, which is below the regional average. According to the 2021 Census data (which may reflect COVID-19 conditions), only 11.9% of residents work from home. The service frequency averages 214 trips per day across all routes, equating to approximately 124 weekly trips per individual stop.

The level of general health in St Clair is notably higher than the national average with both young and old age cohorts seeing low prevalence of common health conditions

St Clair demonstrates above-average health outcomes based on AreaSearch's assessment of mortality rates and chronic condition prevalence. Both young and old age cohorts show low prevalence of common health conditions.

The rate of private health cover is exceptionally high at approximately 60% of the total population (1,768 people), compared to 52.7% across Greater Adelaide. The most common medical conditions in the area are mental health issues and asthma, impacting 8.0 and 6.2% of residents respectively. 78.7% of residents declare themselves completely clear of medical ailments, compared to 67.9% across Greater Adelaide. Working-age residents show notably healthy outcomes with low chronic condition prevalence. The area has 8.6% of residents aged 65 and over (254 people), lower than the 19.3% in Greater Adelaide. Health outcomes among seniors are above average, with national rankings broadly in line with the general 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 has a high cultural diversity with 38.5% of its population born overseas and 38.0% speaking a language other than English at home. Christianity is the main religion, composing 39.1% of St Clair's population. Islam is overrepresented at 6.7%, compared to Greater Adelaide's 3.0%.

The top three ancestry groups are English (18.9%), Australian (16.7%), and Other (15.6%). Notably, Hungarian (0.6%), Serbian (1.1%), and Russian (0.8%) ethnicities are overrepresented in St Clair compared to regional averages of 0.3%, 0.4%, and 0.3% respectively.

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 national average of 38 years. Compared to Greater Adelaide, St Clair has a higher proportion of residents aged 25-34 years at 26.5%, but fewer residents aged 75-84 years at 2.3%. This concentration of 25-34 year-olds is significantly higher than the national average of 14.4%. Between the 2021 Census and now, the population aged 35 to 44 has increased from 18.7% to 19.7%, while the 45 to 54 age group has decreased from 11.2% to 9.4% and the 15 to 24 age group has dropped from 13.4% to 11.8%. By 2041, population forecasts indicate substantial demographic changes for St Clair. The 45 to 54 age cohort is projected to grow by 24%, adding 67 residents to reach a total of 345. In contrast, the 55 to 64 age cohort is projected to show minimal growth of just 5% (11 people).