St Clair

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

Based on AreaSearch's analysis, St Clair's population is around 20,602 as of Feb 2026. This reflects an increase of 660 people (3.3%) since the 2021 Census, which reported a population of 19,942 people. The change is inferred from the estimated resident population of 20,377 from the ABS as of June 2024 and an additional 30 validated new addresses since the Census date. This population level equates to a density ratio of 2,861 persons per square kilometer, placing it in the upper quartile relative to national locations assessed by AreaSearch. Population growth for the area was primarily driven by natural growth, which contributed approximately 61.4% of overall population gains during recent periods.

AreaSearch adopts 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, AreaSearch utilizes the NSW State Government's SA2 level projections, as released in 2022 with 2021 as the base year. Growth rates by age group from these aggregations are also applied to all areas for years 2032 to 2041. As we examine future population trends, projections indicate a decline in overall population, with the area's population expected to shrink by 171 persons by 2041 according to this methodology. However, growth across specific age cohorts is anticipated, led by the 75 to 84 age group, which is projected to expand by 729 people. See the age section for more details.

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 around 46 new homes approved each year, with 234 homes approved over the past 5 financial years (between FY-21 and FY-25) and 44 so far in FY-26. Given population has fallen over the past period, new supply has likely been keeping up with demand, offering good choice to buyers, while new dwellings are developed at an average construction cost of $207,000—under regional levels—indicating more accessible housing choices for buyers. Also, $2.3 million in commercial approvals have been registered this financial year, indicating minimal commercial development activity.

Relative to Greater Sydney, St Clair records markedly lower building activity (51.0% below regional average per person). This scarcity of new homes typically strengthens demand and prices for existing properties. This activity is also below average nationally, reflecting the area's maturity and pointing to possible planning constraints. New building activity shows 79.0% detached houses and 21.0% medium and high-density housing, preserving the area's suburban nature with an emphasis on detached houses attracting space-seeking buyers. This represents a notable shift from the area's existing housing (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.

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

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

Nothing can influence an area's performance as much as changes to local infrastructure, major projects, and planning initiatives. In total 8 projects have been identified by AreaSearch that are likely to have an impact on the area. Key projects include the Erskine Park Employment Area (EPEA) Expansion, M12 Motorway, Mamre Road Upgrade - M4 to Erskine Park Road (Stage 1), and Western Sydney Aerotropolis Infrastructure and Development, with the list below detailing those likely to be of most relevance.

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 analysis indicates St Clair maintains employment conditions that align with national benchmarks

St Clair possesses a skilled workforce, with manufacturing and industrial sectors strongly represented, and an unemployment rate of only 3.2%. As of December 2025, 10,839 residents are in work while the unemployment rate is 1.0% below Greater Sydney's rate of 4.2%, and workforce participation is broadly similar to Greater Sydney's 70.2%. Based on Census responses, a high 29.2% of residents were found to work from home, though Covid-19 lockdown impacts should be considered.

Leading employment industries among residents comprise health care and social assistance, construction, and retail trade. The area shows particularly strong specialization in transport, postal and warehousing, with an employment share of 1.9 times the regional level. Conversely, professional and technical services show lower representation at 4.3% versus the regional average of 11.5%. The predominantly residential area appears to offer limited employment opportunities locally, as indicated by the count of the Census working population versus the resident population.

Based on AreaSearch analysis of SALM and ABS data, during the year to December 2025, the labour force decreased by 4.7% combined with employment decreasing by 4.6%, leaving unemployment broadly flat. In contrast, Greater Sydney experienced employment growth of 2.2% and labour force growth of 2.3%, with a marginal rise. Jobs and Skills Australia's national employment forecasts from May-25 can offer further insight into potential future demand within St Clair. These projections, covering five and ten-year periods, have been mapped against the local employment profile to estimate growth patterns. While national employment is forecast to expand by 6.6% over five years and 13.7% over ten years, growth rates differ significantly between industry sectors. Applying these industry-specific projections to St Clair's employment mix suggests local employment should increase by 6.1% over five years and 12.7% over ten years (please note this is a simple weighting extrapolation for illustrative purposes and does not take into account localised population projections).

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

As per AreaSearch's latest postcode level ATO data released for FY-23, the St Clair SA2's median income among taxpayers is $60,609, with an average of $66,409. This is just below the national average, and compares to Greater Sydney's median of $60,817 and average of $83,003. Based on Wage Price Index growth of 8.86% since FY-23, current estimates would be approximately $65,979 (median) and $72,293 (average) as of September 2025. According to 2021 Census figures, household, family and personal incomes in St Clair cluster around the 63rd percentile nationally. Distribution data shows the predominant cohort spans 38.6% of locals (7,952 people) in the $1,500 - 2,999 category, mirroring regional levels where 30.9% occupy this bracket. High housing costs consume 16.0% of income, though strong earnings still place disposable income at the 69th percentile and 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

Dwelling structure within St Clair, as evaluated at the latest Census, comprised 98.5% houses and 1.4% other dwellings (semi-detached, apartments, 'other' dwellings), in comparison to Sydney metro's 55.9% houses and 44.1% other dwellings. Meanwhile, the level of home ownership within St Clair was higher than that of Sydney metro, at 31.2%, with the remainder of dwellings either mortgaged (47.1%) or rented (21.7%). The median monthly mortgage repayment in the area was well below the Sydney metro average at $2,167, while the median weekly rent figure was recorded at $440, compared to Sydney metro's $2,427 and $470. Nationally, St Clair's mortgage repayments are significantly higher than the Australian average of $1,863, while rents are 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 dominate at 84.1% of all households, comprising 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 of 3.0 people is 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 faces educational challenges, with university qualification rates (17.1%) substantially below the Greater Sydney average of 38.0%. This represents both a challenge and an opportunity for targeted educational initiatives. Bachelor degrees lead at 12.7%, followed by postgraduate qualifications (3.3%) and graduate diplomas (1.1%). Trade and technical skills feature prominently, with 37.6% of residents aged 15+ holding vocational credentials, including advanced diplomas (10.1%) and certificates (27.5%).

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

Public transport analysis reveals 102 active transport stops operating within St Clair, comprising a mix of buses. These stops are serviced by 32 individual routes, collectively providing 1,440 weekly passenger trips. Transport accessibility is rated as good, with residents typically located 205 meters from the nearest transport stop. As a primarily residential area, most residents commute outward, and the car remains the dominant mode at 91%. Vehicle ownership averages 1.8 per dwelling, which is above the regional average. A high 29.2% of residents work from home (2021 Census; may reflect COVID-19 conditions).

Service frequency averages 205 trips per day across all routes, equating to approximately 14 weekly trips per individual stop. The accompanying map shows the 100 nearest stops to the location 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 of mortality rates and chronic condition prevalence. The prevalence of common health conditions is low among the general population, though higher than the national average across older, at-risk cohorts. The rate of private health cover slightly lags the average SA2 area at approximately 52% of the total population (~10,733 people), compared to 59.9% across Greater Sydney.

The most common medical conditions in the area are asthma and arthritis, impacting 8.0% and 7.4% of residents, respectively, while 70.7% declared themselves as completely clear of medical ailments compared to 74.6% across Greater Sydney. Health outcomes among the working-age population are broadly typical. The area has 16.2% of residents aged 65 and over (3,333 people). Health outcomes among seniors present some challenges, though they rank lower nationally 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 be more culturally diverse than the vast majority of local markets, with 28.3% of its population born overseas and 25.6% speaking a language other than English at home. The main religion in St Clair is Christianity, which makes up 63.6% of people in St Clair, compared to 49.2% across Greater Sydney.

In terms of ancestry (country of birth of parents), the top three represented groups in St Clair are Australian, comprising 23.2% of the population, which is substantially higher than the regional average of 17.8%, English, comprising 20.4% of the population, and Other, comprising 13.8% of the population. Additionally, there are notable divergences in the representation of certain other ethnic groups: Maltese is notably overrepresented at 3.2% of St Clair (vs 1.0% regionally), Samoan at 1.8% (vs 0.5%) and Filipino at 4.2% (vs 2.0%).

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

At 36 years, St Clair's median age is nearly matching the Greater Sydney average of 37 and is similarly modestly under the Australian median of 38. Relative to Greater Sydney, St Clair has a higher concentration of 65 - 74 residents (10.5%) but fewer 25 - 34 year-olds (12.3%). Since the 2021 Census, the 15 to 24 age group has grown from 12.6% to 14.6% of the population, while the 75 to 84 cohort increased from 2.8% to 4.7%. Conversely, the 55 to 64 cohort has declined from 13.6% to 11.4% and the 25 to 34 group dropped from 14.3% to 12.3%. Demographic modeling suggests St Clair's age profile will evolve significantly by 2041. The 75 to 84 cohort shows the strongest projected growth at 57%, adding 546 residents to reach 1,513. Senior residents (65+) will drive 94% of population growth, underscoring demographic aging trends. On the other hand, the 55 to 64 and 25 to 34 cohorts are expected to experience population declines.