St Clair

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

St Clair's population is approximately 20,556 as of May 2026. This figure represents an increase of 614 people from the 2021 Census total of 19,942. The growth is inferred from ABS estimates and validated new addresses since the Census date in June 2025. This results in a population density of 2,855 persons per square kilometer, placing St Clair in the upper quartile nationally according to AreaSearch assessments. The area's 3.1% growth since the census is within 2.3 percentage points of its SA3 area's growth rate of 5.4%. Natural growth contributed about 55.7% of overall population gains recently.

AreaSearch uses ABS/Geoscience Australia projections for each SA2 area, released in 2024 with a base year of 2022, and NSW State Government's SA2 level projections where applicable, released in 2022 with a base year of 2021. By 2041, the population is projected to decline by 157 persons overall, while specific age cohorts are expected to grow, notably the 75 to 84 age group which is projected to expand by 618 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 55 approved in FY26 so far. Despite a decline in population during this period, the new housing supply appears to have kept pace with demand, providing good options for buyers.

The average expected construction cost of these new dwellings is $207,000, which is below regional levels, suggesting more affordable housing choices for buyers. This financial year has seen around $2.3 million in commercial approvals registered, indicating minimal commercial development activity compared to the Greater Sydney region. St Clair records significantly lower building activity overall, at 51.0% below the regional average per person, which typically strengthens demand and prices for existing properties due to scarcity of new homes. This activity is also below national averages, reflecting the area's maturity and potential planning constraints. The new building approvals show a mix of 79.0% detached houses and 21.0% medium and high-density housing, preserving St Clair's suburban character while indicating a shift towards more diverse housing options. This shift suggests decreasing availability of developable sites and reflects changing lifestyles and demand for affordable housing alternatives.

With around 478 people per dwelling approval, St Clair indicates a developed market with stable or declining population projections, which should reduce 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 likely to affect this region. Notable ones are the Erskine Park Employment Area Expansion, M12 Motorway, Western Sydney Aerotropolis Infrastructure Development, and Mamre Road Upgrade - M4 to Erskine Park Road (Stage 1). 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 analysis indicates St Clair maintains employment conditions that align with national benchmarks

St Clair has a skilled workforce with manufacturing and industrial sectors well-represented. Its unemployment rate is 3.2%. As of December 2025, 10,839 residents are employed while the unemployment rate stands at 1.0% lower than Greater Sydney's rate of 4.2%.

Workforce participation in St Clair is similar to Greater Sydney's figure of 68.8%. According to Census responses, 29.2% of residents work from home. Leading employment industries include health care & social assistance, construction, and retail trade. The area shows strong specialization in transport, postal & warehousing with an employment share of 1.9 times the regional level, but lower representation in professional & technical services at 4.3%, compared to the regional average of 11.5%.

The predominantly residential area offers limited local employment opportunities as indicated by the working population count versus resident population. Between December 2024 and December 2025, St Clair's labour force decreased by 4.7% with employment decreasing by 4.6%, leaving unemployment broadly unchanged. In contrast, Greater Sydney experienced employment growth of 2.2% and labour force growth of 2.3%. Jobs and Skills Australia's national employment forecasts from May-25 suggest that St Clair's employment should increase by 6.1% over five years and 12.7% over ten years, based on industry-specific projections applied to the local employment mix.

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 2023 shows St Clair SA2 had a median income among taxpayers of $60,609 and an average of $66,409. This is slightly below the national average. In comparison, Greater Sydney had a median income of $60,817 and an average of $83,003. Based on Wage Price Index growth of 10.32% since financial year 2023, current estimates for St Clair would be approximately $66,864 (median) and $73,262 (average) as of March 2026. According to the 2021 Census, incomes in St Clair cluster around the 63rd percentile nationally. Income distribution data shows that 38.6% of locals (7,934 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, 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 dwellings, as per the latest Census evaluation, consisted of 98.5% houses and 1.4% other dwellings (semi-detached, apartments, 'other' dwellings), contrasting with Sydney metro's 55.9% houses and 44.1% other dwellings. Home ownership in St Clair stood at 31.2%, surpassing the Sydney metro level, with mortgaged dwellings at 47.1% and rented ones at 21.7%. The median monthly mortgage repayment in St Clair was $2,167, below Sydney metro's average of $2,427. The median weekly rent figure for St Clair was recorded at $440, compared to Sydney metro's $470. Nationally, St Clair's mortgage repayments were higher than the Australian average of $1,863, while 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, including 43.3% that are couples with children, 25.1% that are couples without children, and 14.8% that are 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 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 moderate compared to other areas nationally based on assessment of service frequency, route connectivity and accessibility

Analysis of public transport in St Clair indicates 102 active transport stops operating within the area, serving a mix of bus routes. 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. The dominant mode of transportation remains cars at 91%. Vehicle ownership averages 1.8 per dwelling, which is above the regional average.

According to the 2021 Census, a high 29.2% of residents work from home, potentially reflecting 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 in June 2021. The prevalence of common health conditions is low among the general population but higher than the national average across older, at-risk cohorts.

Private health cover stands at approximately 52% of the total population (~10,709 people), compared to 59.9% across Greater Sydney as of March 2021. 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 completely clear of medical ailments compared to 74.6% across Greater Sydney as of June 2021. Health outcomes among the working-age population are broadly typical. As of June 2021, the area has 16.3% of residents aged 65 and over (3,344 people). Health outcomes among seniors present some challenges but rank lower nationally than the broader population as of AreaSearch's assessment in June 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's population showed higher cultural diversity compared to most local markets, with 28.3% born overseas and 25.6% speaking a language other than English at home. Christianity was the predominant religion in St Clair, comprising 63.6%, which is higher than Greater Sydney's average of 49.2%. In terms of ancestry, Australians made up 23.2%, English 20.4%, and Other 13.8% of St Clair's population.

Notably, Maltese (3.2%), Samoan (1.8%), and Filipino (4.2%) ethnic groups were more represented in St Clair 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 nearly 36 years, close to Greater Sydney's average of 37 and slightly below Australia's median of 38. Compared to Greater Sydney, St Clair has a higher proportion of residents aged 65-74 (10.8%) but fewer residents aged 25-34 (12.8%). Between the 2021 Census and now, the population aged 75 to 84 has increased from 2.8% to 4.5%, while the 15 to 24 age group has risen from 12.6% to 14.2%. Conversely, the 55 to 64 age group has decreased from 13.6% to 11.3%, and the 25 to 34 cohort has dropped from 14.3% to 12.8%. By 2041, demographic modeling suggests St Clair's age profile will change significantly. The 75 to 84 age group is projected to grow by 58%, adding 536 residents to reach 1,462. Residents aged 65 and above are expected to drive 91% of population growth, indicating demographic aging trends. Conversely, the 25 to 34 and 15 to 24 age groups are projected to experience population declines.