St Clair

St Clair has shown very soft population growth performance across periods assessed by AreaSearch

St Clair's population, as of November 2025, is approximately 20,395 people. This figure represents an increase of 453 individuals since the 2021 Census, which recorded a population of 19,942. The growth is inferred from ABS estimates; the resident population was 20,377 in June 2024, with an additional 31 validated new addresses post-census. This results in a population density of 2,832 persons per square kilometer, placing St Clair in the upper quartile nationally according to AreaSearch assessments. The area's 2.3% growth since the census is within 2.1 percentage points of the SA3 area's 4.4%, indicating strong growth fundamentals. Natural growth contributed approximately 61.4% of overall population gains recently.

For projections, AreaSearch uses ABS/Geoscience Australia data (released in 2024, base year 2022) for covered areas and NSW State Government SA2 level projections (released in 2022, base year 2021) for uncovered areas. Growth rates by age group are applied from 2032 to 2041. By 2041, the population is projected to decline by 171 persons overall but expand within specific age cohorts, notably the 75-84 age group, which is expected to grow by 729 people.

AreaSearch assessment of residential development drivers sees a low level of activity in St Clair, placing the area among the bottom 25% of areas assessed nationally

St Clair has seen approximately 46 new homes approved annually. Over the past five financial years, from FY21 to FY25, around 234 homes were approved, with an additional 35 approved so far in FY26. The average value of these new dwellings is $207,000, which is below regional levels, suggesting more affordable housing options for buyers.

In terms of commercial development, St Clair has registered approximately $2.3 million in approvals this financial year, indicating minimal activity in this sector compared to the Greater Sydney region, where building activity is 51.0% higher per person on average. This scarcity of new homes typically strengthens demand and prices for existing properties due to limited supply. Nationally, St Clair's building activity is also below average, reflecting the area's maturity and potential planning constraints. The type of housing being developed in St Clair is predominantly detached houses, with 79.0% of approvals for this category, while medium and high-density housing accounts for 21.0%. This shift from the existing housing stock (currently 98.0% houses) suggests decreasing availability of developable sites and reflects changing lifestyles and demand for more diverse, affordable housing options. St Clair's population-to-dwelling approval ratio is around 478 people per dwelling, indicating a developed market with stable or declining population projections, which should reduce future housing demand pressures, benefiting potential buyers.

With population projections showing stability or decline, St Clair should see reduced housing demand pressures, benefiting potential buyers.

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

Eight projects identified by AreaSearch are expected to impact the area significantly. These include expansions at Erskine Park Employment Area, construction of the M12 Motorway, upgrade of Mamre Road from M4 to Erskine Park Road (Stage 1), and infrastructure development in Western Sydney Aerotropolis.

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AreaSearch assessment positions St Clair ahead of most Australian regions for employment performance

St Clair has a skilled workforce with manufacturing and industrial sectors well-represented, and an unemployment rate of 2.8% as of September 2025. In this period, 11,012 residents are employed while the unemployment rate is 1.4% lower than Greater Sydney's rate of 4.2%.

Workforce participation stands at 62.8%, slightly higher than Greater Sydney's 60.0%. Key employment industries include health care & social assistance, construction, and retail trade. Notably, transport, postal & warehousing has a strong presence with an employment share 1.9 times the regional level. Conversely, professional & technical services have lower representation at 4.3% compared to the regional average of 11.5%.

The area's predominantly residential nature suggests limited local employment opportunities. Between September 2024 and September 2025, St Clair's labour force decreased by 3.9%, with employment decreasing by 3.5%, leading to a 0.5 percentage point drop in unemployment. In contrast, Greater Sydney experienced employment growth of 2.1% and labour force growth of 2.4%, resulting in a 0.2 percentage point rise in unemployment. State-level data from NSW as of 25-November shows employment contracted by 0.03%, with an unemployment rate of 3.9%, outperforming the national rate of 4.3%. Job and Skills Australia's national employment forecasts from May-25 indicate that national employment is projected to expand by 6.6% over five years and 13.7% over ten years. Applying these projections to St Clair's employment mix suggests local employment should increase by 6.1% over five years and 12.7% over ten years, though these are simple extrapolations for illustrative purposes and do not account for local population projections.

The area exhibits notably strong income performance, ranking higher than 70% of areas assessed nationally through AreaSearch analysis

AreaSearch released postcode level ATO data for financial year 2022. St Clair SA2's median income among taxpayers was $56,872 with an average of $63,145. This is below the national average and compares to Greater Sydney's median of $56,994 and average of $80,856. By September 2025, estimates suggest median income would be approximately $64,044 and average at $71,108 based on Wage Price Index growth of 12.61% since financial year 2022. According to 2021 Census figures, incomes in St Clair cluster around the 63rd percentile nationally. Income distribution shows that 38.6% of locals (7,872 people) fall into the $1,500 - 2,999 category, mirroring regional levels where 30.9% occupy this bracket. High housing costs consume 16.0% of income, leaving disposable income at the 69th percentile nationally. St Clair's SEIFA income ranking places it in the 4th decile.

St Clair is characterized by a predominantly suburban housing profile, with above-average rates of outright home ownership

St Clair's dwelling structure, as per the latest Census, consisted of 98.5% houses and 1.4% other dwellings (semi-detached, apartments, 'other' dwellings), contrasting with Sydney metro's 81.7% houses and 18.2% other dwellings. Home ownership in St Clair stood at 31.2%, with mortgaged dwellings at 47.1% and rented ones at 21.7%. The median monthly mortgage repayment was $2,167, surpassing Sydney metro's average of $2,000. Weekly rent in St Clair was recorded at $440, compared to Sydney metro's $390. Nationally, St Clair's mortgage repayments exceeded the Australian average of $1,863, while rents were substantially higher than the national figure of $375.

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

Family households account for 84.1% of all households, including 43.3% couples with children, 25.1% couples without children, and 14.8% single parent families. Non-family households constitute the remaining 15.9%, with lone person households at 14.2% and group households comprising 1.7%. The median household size is 3.0 people, which is larger than the Greater Sydney average of 2.8.

Educational outcomes in St Clair fall within the lower quartile nationally, indicating opportunities for improvement in qualification attainment

The area's university qualification rate is 17.1%, significantly lower than Greater Sydney's average of 38.0%. Bachelor degrees are the most common at 12.7%, followed by postgraduate qualifications (3.3%) and graduate diplomas (1.1%). Vocational credentials are prominent, with 37.6% of residents aged 15+ holding them, including advanced diplomas (10.1%) and certificates (27.5%). Educational participation is high at 29.6%, with 10.9% in primary education, 8.4% in secondary education, and 4.0% pursuing tertiary education.

Educational participation is notably high, with 29.6% of residents currently enrolled in formal education. This includes 10.9% in primary education, 8.4% in secondary education, and 4.0% pursuing tertiary education.

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

The analysis of public transport in St Clair indicates that there are 86 active transport stops currently operating within the area. These stops primarily serve buses, with a total of 32 individual routes providing service. Collectively, these routes facilitate 1,002 weekly passenger trips.

The accessibility of transport is rated as good, with residents on average located approximately 204 meters from their nearest transport stop. On average, there are 143 trips per day across all routes, which equates to roughly 11 weekly trips per individual stop.

St Clair's residents are healthier than average in comparison to broader Australia with prevalence of common health conditions quite low among the general population though higher than the nation's average across older, at risk cohorts

St Clair's health data shows positive results with low prevalence of common conditions among its general population, despite being higher than the national average for older, at-risk groups.

Private health cover is slightly lower than the average SA2 area, with approximately 51% coverage (~10,442 people). The most prevalent medical conditions are asthma and arthritis, affecting 8.0% and 7.4% of residents respectively. 70.7% of residents report no medical ailments, compared to 69.7% in Greater Sydney. St Clair has a higher proportion of seniors aged 65 and over at 15.5% (3,153 people), compared to Greater Sydney's 14.3%. Health outcomes among seniors require more attention than the broader population.

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

St Clair's population shows higher cultural diversity than most local markets, with 28.3% born overseas and 25.6% speaking a language other than English at home. Christianity is the predominant religion in St Clair at 63.6%, slightly higher than Greater Sydney's 60.9%. The top three ancestral groups are Australian (23.2%), English (20.4%), and Other (13.8%).

Notably, Maltese, Samoan, and Filipino ethnicities have differing representations: Maltese at 3.2% in St Clair versus 2.6% regionally, Samoan at 1.8% versus 2.1%, and Filipino at 4.2% versus 4.5%.

St Clair's population is slightly younger than the national pattern

St Clair's median age is 36 years, nearly matching Greater Sydney's average of 37 years, which is slightly below Australia's median age of 38 years. Compared to Greater Sydney, St Clair has a higher proportion of residents aged 65-74 (10.2%) but fewer residents aged 25-34 (12.6%). Between the 2021 Census and the present, the percentage of residents aged 15-24 has increased from 12.6% to 14.3%, while the percentage of those aged 75-84 has risen from 2.8% to 4.3%. Conversely, the percentage of residents aged 55-64 has decreased from 13.6% to 11.6%, and the percentage of those aged 25-34 has dropped from 14.3% to 12.6%. By 2041, demographic modeling suggests St Clair's age profile will significantly change. The 75-84 cohort is projected to grow by 73%, adding 638 residents to reach 1,513. Residents aged 65 and above are expected to drive 90% of population growth, highlighting demographic aging trends. Meanwhile, the 55-64 and 15-24 cohorts are projected to experience population declines.