St Marys - North St Marys

Population growth drivers in St Marys - North St Marys are strong compared to national averages based on AreaSearch's ranking of recent, and medium to long-term trends

St Marys - North St Marys' population is approximately 19,350 as of Feb 2026. This figure represents an increase of 2,025 people (11.7%) since the 2021 Census, which recorded a population of 17,325. The change is inferred from the estimated resident population of 18,605 in June 2024 and an additional 405 validated new addresses since the Census date. This results in a population density ratio of 1,504 persons per square kilometer, above the average seen across national locations assessed by AreaSearch. St Marys - North St Marys' growth rate of 11.7% since the 2021 census surpassed that of the SA3 area (6.4%) and the SA4 region, indicating it as a growth leader in the region. Overseas migration contributed approximately 67.1% of overall population gains during recent periods.

AreaSearch uses ABS/Geoscience Australia projections for each SA2 area, released in 2024 with 2022 as the base year. For areas not covered by this data, AreaSearch utilises NSW State Government's SA2 level projections, released in 2022 with 2021 as the base year. Growth rates by age group from these aggregations are applied to all areas for years 2032 to 2041. By 2041, a significant population increase is forecasted, with the area expected to grow by 4,616 persons, reflecting an overall increase of 20.0% over the 17-year period based on the latest annual ERP population numbers.

AreaSearch assessment of residential development activity positions St Marys - North St Marys among the top 25% of areas assessed nationwide

St Marys - North St Marys averaged around 160 new dwelling approvals per year. Over the past five financial years, from FY21 to FY25800 homes were approved, with an additional 34 approved so far in FY26. On average, 1.6 new residents arrived per new home over these five years, indicating balanced supply and demand conditions. However, recent data shows this ratio has intensified to 5.3 people per dwelling over the past two financial years, suggesting growing popularity and potential undersupply.

New homes are being built at an average construction cost of $212,000, which is under regional levels, offering more accessible housing choices for buyers. This year alone, $92.5 million in commercial approvals have been registered, indicating robust local business investment. Compared to Greater Sydney, St Marys - North St Marys has 93.0% more construction activity per person, providing ample choice for buyers despite recent moderation in development activity. Recent construction comprises 26.0% detached dwellings and 74.0% townhouses or apartments, marking a significant shift from the current housing pattern of 61.0% houses. This trend suggests diminishing developable land availability and responds to evolving lifestyle preferences and housing affordability needs. With around 208 people per dwelling approval, St Marys - North St Marys exhibits characteristics of a growth area.

Population forecasts indicate it will gain 3,871 residents by 2041, based on the latest AreaSearch quarterly estimate. Given current development patterns, new housing supply should readily meet demand, offering good conditions for buyers and potentially facilitating population growth beyond current projections.

St Marys - North St Marys has strong levels of nearby infrastructure activity, ranking in the top 30% nationally

Local infrastructure changes significantly influence an area's performance. AreaSearch identified 37 projects potentially impacting the area. Notable ones include St Marys Station Upgrade and Metro Integration, Western Sydney Aerotropolis Infrastructure and Development, Luddenham Metro Station and Sydney Science Park, and St Marys Central Park. The following list details those most relevant.

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

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Employment conditions in St Marys - North St Marys face significant challenges, ranking among the bottom 10% of areas assessed nationally

St Marys - North St Marys has a skilled workforce with manufacturing and industrial sectors prominently represented. The unemployment rate as of September 2025 is 8.0%. There are 8,420 residents employed while the unemployment rate is 3.8% higher than Greater Sydney's rate of 4.2%, indicating room for improvement.

Workforce participation lags at 62.0% compared to Greater Sydney's 70.0%. According to Census responses, 23.1% of residents work from home. Leading employment industries include health care & social assistance, retail trade, and construction. The area has a notable concentration in transport, postal & warehousing with employment levels at 2.1 times the regional average.

However, professional & technical services have limited presence with only 3.9% of employment compared to the regional average of 11.5%. Many residents commute elsewhere for work based on Census data. Over the 12 months to September 2025, labour force levels decreased by 3.5%, while employment declined by 1.2%, causing a drop in unemployment rate by 2.1 percentage points. In contrast, Greater Sydney saw employment grow by 2.1% and unemployment rise slightly by 0.2 percentage points during the same period. Jobs and Skills Australia's 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 Marys - North St Marys' employment mix suggests local employment should increase by 6.2% over five years and 13.0% over ten years, though this is a simple weighting extrapolation for illustrative purposes only.

Income levels sit below national averages according to AreaSearch assessment

AreaSearch's latest postcode level ATO data for financial year ending June 30, 2023 shows median income in St Marys - North St Marys SA2 is $56,004 and average income is $60,381. This compares to Greater Sydney's median income of $60,817 and average income of $83,003. Based on Wage Price Index growth of 8.86% from July 2023 to September 2025, estimated incomes would be approximately $60,966 (median) and $65,731 (average). The 2021 Census data ranks household, family, and personal incomes in St Marys - North St Marys between the 28th to 31st percentiles. The earnings profile shows 34.1% of residents earning $1,500-$2,999 weekly, similar to the broader region's 30.9%. Housing affordability pressures are severe with only 78.0% of income remaining, ranking at the 20th percentile.

St Marys - North St Marys displays a diverse mix of dwelling types, with a higher proportion of rental properties than the broader region

St Marys - North St Marys dwelling structures, as per the latest Census data, consisted of 61.2% houses and 38.8% other dwellings (semi-detached, apartments, 'other' dwellings). This compares to Sydney metro's 55.9% houses and 44.1% other dwellings. Home ownership in St Marys - North St Marys stood at 19.3%, with the remaining dwellings being mortgaged (26.2%) or rented (54.5%). The median monthly mortgage repayment was $1,842, below Sydney metro's average of $2,427. Median weekly rent in St Marys - North St Marys was $360, compared to Sydney metro's $470. Nationally, mortgage repayments were lower at $1,863 and rents were less at $375.

St Marys - North St Marys features high concentrations of group households and lone person households, with a lower-than-average median household size

Family households constitute 65.6% of all households, including 27.4% couples with children, 17.5% couples without children, and 18.7% single parent families. Non-family households comprise the remaining 34.4%, with lone person households at 30.2% and group households making up 4.2% of the total. The median household size is 2.5 people, which is smaller than the Greater Sydney average of 2.7.

St Marys - North St Marys faces educational challenges, with performance metrics placing it in the bottom quartile of areas assessed nationally

The area's university qualification rate is 18.8%, significantly lower than Greater Sydney's average of 38.0%. Bachelor degrees are the most common at 13.0%, followed by postgraduate qualifications (4.7%) and graduate diplomas (1.1%). Vocational credentials are prevalent, with 35.7% of residents aged 15+ holding them, including advanced diplomas (9.8%) and certificates (25.9%). Educational participation is high at 33.5%, with 12.6% in primary education, 8.3% in secondary education, and 4.4% pursuing tertiary education.

Educational participation is notably high, with 33.5% of residents currently enrolled in formal education. This includes 12.6% in primary education, 8.3% in secondary education, and 4.4% pursuing tertiary education.

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

St Marys - North St Marys has 160 active public transport stops offering a mix of train and bus services. These are operated by 49 individual routes, serving 8,248 weekly passenger trips in total. Residents have excellent transport accessibility, with an average distance of 157 meters to the nearest stop. The area is predominantly residential, with most commuters travelling outward. Cars remain the primary mode of transport at 82%, while train usage stands at 10%. Vehicle ownership averages 1.0 per dwelling, lower than the regional average.

According to the 2021 Census, 23.1% of residents work from home, which may be influenced by COVID-19 conditions. Service frequency across all routes averages 1,178 trips per day, equating to approximately 51 weekly trips per stop. A map accompanies this data, displaying the 100 nearest stops to the location's centrepoint.

Health performance in St Marys - North St Marys is a key challenge with a range of health conditions having marked impacts on both younger and older age cohorts

St Marys-North St Marys faces significant health challenges, as indicated by AreaSearch's assessment of mortality rates and chronic condition prevalence. A wide range of health conditions affects both younger and older age groups. Private health cover is relatively low at approximately 49% of the total population (~9,520 people), compared to 59.9% in Greater Sydney and a national average of 55.7%.

The most prevalent medical conditions are asthma (8.7%) and mental health issues (8.4%). Conversely, 67.6% of residents report no medical ailments, compared to 74.6% in Greater Sydney. Working-age individuals face notable health challenges due to elevated chronic condition rates. The area has 14.4% of residents aged 65 and over (2,782 people), lower than the 15.4% in Greater Sydney. Health outcomes among seniors present some challenges, broadly aligning with national rankings for the general population.

St Marys - North St Marys was found to be more culturally diverse than the vast majority of local markets in Australia, upon assessment of a range of language and cultural background related metrics

St Marys-North St Marys has a high cultural diversity, with 34.2% of its population born overseas and 31.1% speaking a language other than English at home. Christianity is the predominant religion in St Marys-North St Marys, comprising 57.7% of its population. Hinduism, however, is slightly overrepresented compared to Greater Sydney, making up 4.8% versus 2.6%.

The top three ancestry groups are Australian (20.8%), English (19.8%), and Other (17.5%). Notably, Samoan (2.7%) and Filipino (4.7%) populations are significantly higher than the regional averages of 0.5% and 2.0%, respectively. Maori population is also notably higher at 1.5%.

St Marys - North St Marys's population is younger than the national pattern

St Marys - North St Marys has a median age of 35 years, which is slightly younger than Greater Sydney's 37 and the national average of 38. The 5-14 age group makes up 13.5%, compared to Greater Sydney, while the 35-44 cohort constitutes 14.2%. Between 2021 and present, the 15-24 age group has increased from 12.3% to 13.7% of the population. Conversely, the 25-34 cohort has decreased from 16.4% to 15.2%. By 2041, demographic forecasts indicate significant changes in St Marys - North St Marys. The 75-84 age group is projected to rise substantially, increasing by 641 people (71%) from 903 to 1,545. Meanwhile, the 0-4 cohort is expected to grow modestly by 5% (75 people).