St Clair

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

St Clair's population, as per AreaSearch's analysis, is 20,602 as of November 2025. This figure represents an increase of 660 people, a 3.3% rise from the 2021 Census which reported a population of 19,942. The change is inferred from the estimated resident population of 20,377 in June 2024 and an additional 31 validated new addresses since the Census date. This results in a population density ratio of 2,861 persons per square kilometer, placing St Clair in the upper quartile relative to national locations assessed by AreaSearch. Natural growth contributed approximately 61.4% of overall population gains during recent periods.

AreaSearch is adopting ABS/Geoscience Australia projections for each SA2 area, released in 2024 with a base year of 2022. For areas not covered by this data, AreaSearch uses the NSW State Government's SA2 level projections, 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. Future population trends indicate an overall decline, with the area's population expected to shrink by 171 persons by 2041. However, specific age cohorts are anticipated to grow, notably the 75 to 84 age group which is projected to expand 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 FY-21 to FY-25234 homes were approved, with a further 41 approved in FY-26 as of the current date. The population decline during this period suggests that new supply has likely kept pace with demand, offering buyers good choice.

The average expected construction cost value for new dwellings is $207,000, which is below regional levels, indicating more accessible housing choices for buyers. This financial year, $2.3 million in commercial approvals have been registered, suggesting minimal commercial development activity. Compared to Greater Sydney, St Clair records significantly lower building activity, 51.0% below the regional average per person. This scarcity of new homes typically strengthens demand and prices for existing properties. Nationally, this 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 with an emphasis on detached housing attracting space-seeking buyers.

This represents a notable shift from the area's existing housing composition, which is currently 98.0% houses, indicating decreasing availability of developable sites and reflecting changing lifestyles and the need for more diverse, affordable housing options. With around 478 people per dwelling approval, St Clair shows a developed market. Population projections indicating stability or decline suggest that St Clair should see reduced housing demand pressures in the future, benefiting potential buyers.

St Clair has strong levels of nearby infrastructure activity, ranking in the top 40% nationally

Changes to local infrastructure significantly impact an area's performance. AreaSearch has identified eight projects that could affect this region. Notable ones are the Erskine Park Employment Area Expansion, M12 Motorway, Mamre Road Upgrade - 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, and an unemployment rate of 2.8% as of September 2025. The area's unemployment rate is 1.4% lower than Greater Sydney's rate of 4.2%, with similar workforce participation rates at 70.0%. According to Census responses, 29.2% of residents work from home, potentially influenced by Covid-19 lockdowns.

Leading employment industries include health care & social assistance, construction, and retail trade. The area has a notably high specialization in transport, postal & warehousing, with an employment share 1.9 times the regional level, while professional & technical services show lower representation at 4.3% compared to the regional average of 11.5%. Limited local employment opportunities are suggested by the ratio of working population to resident population. 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 saw employment growth of 2.1% and labour force growth of 2.4%, with a 0.2 percentage point rise in unemployment. Jobs and Skills Australia's national employment forecasts from May-25 project overall employment growth of 6.6% over five years and 13.7% over ten years, but industry-specific projections suggest St Clair's employment should increase by 6.1% over five years and 12.7% over ten years.

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 for financial year 2023 shows St Clair SA2 had a median income of $60,609 and an average income of $66,409. This is below the national average. Greater Sydney had a median income of $60,817 and an average income of $83,003 in the same period. Based on Wage Price Index growth of 8.86% since financial year 2023, estimated incomes for St Clair as of September 2025 would be approximately $65,979 (median) and $72,293 (average). The 2021 Census indicates household, family, and personal incomes in St Clair are at the 63rd percentile nationally. Income distribution shows that 38.6% of locals (7,952 people) earn between $1,500 and $2,999, similar to regional levels where 30.9% fall into this bracket. High housing costs consume 16.0% of income, but strong earnings place 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, was 98.5% houses and 1.4% other dwellings. In contrast, Sydney metro had 55.9% houses and 44.1% 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, lower than Sydney metro's $2,427. Weekly rent median was $440, compared to Sydney metro's $470. Nationally, St Clair's mortgage repayments were 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 account for 84.1% of all households, consisting of 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% of the total. The median household size is 3.0 people, larger than the Greater Sydney average of 2.7.

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 such qualifications, including advanced diplomas (10.1%) and certificates (27.5%). Educational participation is high, with 29.6% of residents currently enrolled in formal education, comprising 10.9% in primary, 8.4% in secondary, and 4.0% in 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 moderate compared to other areas nationally based on assessment of service frequency, route connectivity and accessibility

St Clair has 102 active public transport stops, all of which are bus stops. These stops are served by 32 different routes that together facilitate 1,440 weekly passenger trips. The area's transport accessibility is rated as good, with residents typically located 205 meters from the nearest stop. Most residents commute outward due to its residential nature. Cars remain the dominant mode of transport at 91%. On average, there are 1.8 vehicles per dwelling, which is higher than the regional average.

According to the 2021 Census, a high 29.2% of residents work from home, possibly reflecting COVID-19 conditions. The service frequency averages 205 trips per day across all routes, equating to approximately 14 weekly trips per individual stop. A map accompanies this data, showing the 100 nearest stops to the location's centrepoint.

The level of general health in St Clair is notably higher than the national average with prevalence of common health conditions low among the general population though higher than the nation's average across older, at risk cohorts

St Clair demonstrates above-average health outcomes based on AreaSearch's assessment conducted in April 2021. The prevalence of common health conditions is low among the general population but higher than the national average among older, at-risk cohorts.

As of March 2021, approximately 52% of St Clair's total population (~10,733 people) has private health cover, compared to Greater Sydney's average of 59.9%. The most common medical conditions in the area are asthma and arthritis, impacting 8.0 and 7.4% of residents respectively, as reported in March 2021. Around 70.7% of St Clair residents declared themselves completely clear of medical ailments at that time, compared to Greater Sydney's 74.6%. Health outcomes among the working-age population are broadly typical. As of June 2020, 15.5% of St Clair's residents are aged 65 and over (3,185 people). Health outcomes among seniors present some challenges, ranking lower nationally than the broader population as reported in April 2021.

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 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. The predominant religion in St Clair is Christianity, which accounts for 63.6% of the population, compared to 49.2% across Greater Sydney. In terms of ancestry, the top three represented groups are Australian (23.2%), English (20.4%), and Other (13.8%).

Notably, Maltese is overrepresented at 3.2%, Samoan at 1.8%, and Filipino at 4.2% compared to regional averages of 1.0%, 0.5%, and 2.0% respectively.

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. This is modestly below Australia's median age of 38 years. Compared to Greater Sydney, St Clair has a higher percentage of residents aged 65-74 (10.2%) but fewer residents aged 25-34 (12.6%). Between the 2021 Census and present, the population aged 15-24 grew from 12.6% to 14.3%, while those aged 75-84 increased from 2.8% to 4.3%. Conversely, the age group 55-64 declined from 13.6% to 11.6%, and the 25-34 group decreased from 14.3% to 12.6%. By 2041, demographic modeling suggests significant changes in St Clair's age profile. The 75-84 cohort is projected to grow by 71%, adding 629 residents to reach 1,513. Residents aged 65 and above will drive 92% of population growth, reflecting demographic aging trends. Meanwhile, the 55-64 and 15-24 cohorts are expected to experience population declines.