St Clair

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

St Clair's population was 19,942 as of the 2021 Census. By November 2025, it had increased to around 20,395, reflecting a growth of 453 people (2.3%). This increase is inferred from ABS estimates and validated new addresses since the Census date. The population density was 2,832 persons per square kilometer as of June 2024, placing St Clair in the upper quartile nationally according to AreaSearch's assessments. Its growth rate since the census (2.3%) is within 2.1 percentage points of the SA3 area's growth rate (4.4%). Natural growth contributed approximately 61.4% 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, NSW State Government's SA2 level projections are used, released in 2022 with a base year of 2021. Growth rates by age group from these aggregations are applied to all areas for years 2032 to 2041. By 2041, St Clair's population is projected to decline by 171 persons overall. However, specific age cohorts are expected to grow, notably the 75 to 84 age group, which is projected to expand by 729 people over this period.

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, a total of 234 homes were approved, with an additional 27 approved so far in FY26. The population decline during this period suggests that new supply has likely been meeting demand, offering buyers good choice.

The average expected construction cost value for new dwellings is $312,000, which is below regional levels, indicating more accessible housing options for buyers. This financial year has seen $2.3 million in commercial approvals registered, suggesting minimal commercial development activity compared to Greater Sydney, where St Clair records 51.0% lower building activity per person. This scarcity of new homes typically strengthens demand and prices for existing properties. Nationally, St Clair's building activity is also below average, reflecting the area's maturity and possible planning constraints. New building activity comprises 79.0% detached houses and 21.0% medium and high-density housing, preserving St Clair's suburban nature while indicating a shift from the area's existing housing composition of 98.0% houses. This suggests decreasing availability of developable sites and reflects changing lifestyles and demand for more diverse, affordable housing options.

With around 478 people per dwelling approval, St Clair shows a developed market. Given population projections indicate stability or decline, St Clair should see reduced housing demand pressures in the future, benefiting potential buyers.

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

Changes to local infrastructure significantly impact an area's performance. AreaSearch has identified eight projects likely to affect this region. Notable projects include the Erskine Park Employment Area expansion, M12 Motorway, Mamre Road upgrade from M4 to Erskine Park Road (Stage 1), and Western Sydney Aerotropolis infrastructure development. The following list details those most relevant.

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

Denotes AI-based impression for illustrative purposes only, not to be taken as definitive under any circumstances. Please follow links and conduct other investigations from the project's source for actual imagery. Developers and project owners wishing us to use original imagery please Contact Us and we will do so.

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

St Clair has a skilled workforce with strong representation in manufacturing and industrial sectors. The unemployment rate is 3.0%.

As of June 2025, there are 11,149 residents employed, with an unemployment rate of 1.2% lower than Greater Sydney's rate of 4.2%. Workforce participation stands at 62.8%, close to Greater Sydney's 60.0%. Key employment industries include health care & social assistance, construction, and retail trade. The area has a particularly strong specialization in transport, postal & warehousing, with an employment share 1.9 times the regional level.

However, professional & technical services show lower representation at 4.3% compared to the regional average of 11.5%. The predominantly residential area offers limited local employment opportunities, as indicated by the Census working population vs resident population count. Between June 2024 and June 2025, St Clair's labour force decreased by 2.3%, with employment decreasing by 2.4%, leaving unemployment broadly flat. In contrast, Greater Sydney saw employment growth of 2.6% and labour force growth of 2.9%. State-level data for NSW to Nov-25 shows employment contracted by 0.03%, losing 2,260 jobs, with the state unemployment rate at 3.9%. National employment forecasts from May-25 project national employment growth of 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 this is a simple extrapolation for illustrative purposes only.

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

AreaSearch's latest postcode level ATO data released for financial year 2022 indicates that St Clair SA2 had a median income among taxpayers of $56,872 and an average income of $63,145. These figures are just below the national average. Comparing to Greater Sydney, St Clair's median income is lower at $56,994 with an average of $80,856. Based on Wage Price Index growth of 12.61% since financial year 2022, current estimates for St Clair would be approximately $64,044 (median) and $71,108 (average) as of September 2025. According to the 2021 Census, incomes in St Clair cluster around the 63rd percentile nationally. The predominant income cohort spans 38.6% of locals (7,872 people), falling within the $1,500 - 2,999 category, which mirrors regional levels at 30.9%. High housing costs consume 16.0% of income in St Clair, but strong earnings place disposable income at the 69th percentile nationally. The area'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). This compares to 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, higher than Sydney metro's $2,000. Median weekly rent in St Clair was $440, compared to Sydney metro's $390. Nationally, St Clair's mortgage repayments were significantly higher at $2,167 versus the Australian average of $1,863, and rents were substantially above the national figure of $375.

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

Family households constitute 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 make up 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, 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 prevalent, with 37.6% of residents aged 15+ holding them, including advanced diplomas (10.1%) and certificates (27.5%). Educational participation is 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

Public transport analysis shows 86 active transport stops operating within St Clair. These stops serve a mix of bus routes, totaling 32 individual routes. Together, they provide 1,002 weekly passenger trips.

Transport accessibility is rated as good, with residents typically located 204 meters from the nearest transport stop. Service frequency averages 143 trips per day across all routes, equating to approximately 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

Health data for St Clair shows a relatively positive picture with low prevalence of common health conditions among its general population compared to national averages.

However, certain cohorts such as older and at-risk individuals have higher rates. Private health cover stands at approximately 51% of the total population (~10,442 people), slightly lower than the average for SA2 areas. The most prevalent medical conditions are asthma (8.0%) and arthritis (7.4%). Notably, 70.7% of residents report being completely clear of medical ailments, compared to 69.7% across 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 these seniors present some challenges that 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 was found to have a higher level of cultural diversity than most local markets, with 28.3% of its population born overseas and 25.6% speaking a language other than English at home. Christianity is the predominant religion in St Clair, making up 63.6% of the population, compared to 60.9% across Greater Sydney. The top three ancestry groups in St Clair are Australian (23.2%), English (20.4%), and Other (13.8%).

Notably, some ethnic groups have different representations: Maltese is higher at 3.2% in St Clair compared to the regional average of 2.6%, Samoan is lower at 1.8% versus 2.1%, and Filipino is slightly higher at 4.2% compared to 4.5%.

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

St Clair's median age is nearly 36 years, closely 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 now, the population aged 15-24 has increased from 12.6% to 14.3%, while the 75-84 age group has risen from 2.8% to 4.3%. Conversely, the 55-64 age group has decreased from 13.6% to 11.6%, and the 25-34 age group has dropped from 14.3% to 12.6%. By 2041, demographic modeling projects significant changes in St Clair's age profile, with the 75-84 cohort showing the strongest growth at 73%, adding 638 residents to reach 1,513. Residents aged 65 and above are expected to drive 90% of population growth, emphasizing demographic aging trends. Meanwhile, the 55-64 and 15-24 age groups are projected to experience population declines.