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This analysis uses Suburbs and Localities (SAL) boundaries, which can materially differ from Statistical Areas (SA2) even when sharing the same name.
SAL boundaries are defined by Australia Post and the Australian Bureau of Statistics to represent commonly-known suburb names used in postal addresses.
Statistical Areas (SA2) are designed for census data collection and may combine multiple suburbs or use different geographic boundaries. For comprehensive analysis, consider reviewing both boundary types if available.
est. as @ -- *
2021 Census | -- people
Sales Activity
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Population
Population growth drivers in North St Marys are above average based on AreaSearch's ranking of recent, and medium to long-term trends
Based on analysis of ABS population updates for the broader area, and new addresses validated by AreaSearch since May 2026, the estimated population of North St Marys is around 4,156. This reflects an increase of 33 people (0.8%) since the 2021 Census, which reported a population of 4,123 people. The change is inferred from the resident population of 4,133 estimated by AreaSearch following examination of the latest ERP data release by the ABS in June 2025 and an additional 16 validated new addresses since the Census date. This level of population equates to a density ratio of 1,302 persons per square kilometer, which is above the average seen across national locations assessed by AreaSearch. Population growth for North St Marys was primarily driven by overseas migration that contributed approximately 67.0% of overall population gains during recent periods.
AreaSearch is adopting ABS/Geoscience Australia projections for each SA2 area, as released in 2024 with a base year of 2022. For any SA2 areas not covered by this data, AreaSearch utilises 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. Moving forward with demographic trends, North St Marys is forecasted to experience a significant population increase in the top quartile of national statistical areas. By 2041, the area is expected to grow by 997 persons based on aggregated SA2-level projections, reflecting an increase of 23.4% in total over the 16 years.
Frequently Asked Questions - Population
Development
AreaSearch analysis of residential development drivers sees North St Marys recording a relatively average level of approval activity when compared to local markets analysed countrywide
North St Marys averaged approximately 37 new dwelling approvals annually over the past five financial years, totalling an estimated 189 homes. As of FY-26 so far, 16 approvals have been recorded. On average, 1.8 new residents arrived per year for each new home between FY-21 and FY-25, suggesting balanced supply and demand. However, this ratio has increased to 11.2 people per dwelling over the past two financial years, indicating growing popularity and potential undersupply. The average construction cost of new homes is $350,000.
This year, there have been $33.0 million in commercial approvals, reflecting strong commercial development momentum. Compared to Greater Sydney, North St Marys has 94.0% more construction activity per person. New developments consist of 19.0% detached houses and 81.0% townhouses or apartments, offering affordable entry pathways for downsizers, investors, and first-time purchasers. This shift contrasts with the area's existing housing composition, which is currently 96.0% houses. The location has approximately 381 people per dwelling approval, reflecting an established area. Population forecasts indicate North St Marys will gain 974 residents by 2041.
At current development rates, new housing supply should meet demand comfortably, providing good conditions for buyers and potentially supporting growth beyond current population projections.
Frequently Asked Questions - Development
Development applications around North St Marys
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| Lodged | Address | Description | Type | Distance | Status |
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SOURCE: Planning portals and council registers, compiled by AreaSearch. Distance & bearing measured from the suburb midpoint.
Infrastructure
North St Marys has very high levels of nearby infrastructure activity, ranking in the top 10% nationally
Changes in local infrastructure significantly affect an area's performance. AreaSearch has identified ten projects expected to impact the region. Notable projects include St Marys Station Upgrade and Metro Integration, Western Sydney Aerotropolis Infrastructure and Development, St Marys Central Park, and St Marys Town Centre Master Plan. The following list outlines those most relevant:.
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INFRASTRUCTURE SEARCH
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Frequently Asked Questions - Infrastructure
Western Sydney Aerotropolis Infrastructure and Development
An 11,200-hectare economic and urban transformation precinct on the doorstep of the new Western Sydney International (Nancy-Bird Walton) Airport. The Aerotropolis is being delivered through a coordinated $28 billion-plus government investment by the NSW and Australian Governments in enabling infrastructure, alongside private sector proposals which had grown to around $33 billion by December 2025 and continue to climb. Anchor projects include Bradfield City Centre (114 hectares with 10,000 future homes and 20,000 jobs), the Advanced Manufacturing Readiness Facility (AMRF), the toll-free M12 Motorway which opened on 14 March 2026, the Sydney Metro Western Sydney Airport line (now expected to open mid-to-late 2027 with a free interim bus service from 5 July 2026), and major upgrades to Mamre Road, Elizabeth Drive and Fifteenth Avenue. Sydney Water is delivering the Upper South Creek Advanced Water Recycling Centre and progressing the Aerotropolis Integrated Stormwater Schemes for the Wianamatta Badgerys, Cosgroves and Duncans Mulgoa catchments, with finalisation in early 2026 and Development Servicing Plan exhibition in Q2 2026. Bradfield Central Park construction is due to begin in the second half of 2026, with FDC Construction & Fitout appointed as head contractor in early 2026. The precinct is targeting more than 100,000 long-term jobs across advanced manufacturing, freight and logistics, aerospace and defence, agribusiness, healthcare, education and research.
St Marys Town Centre Master Plan
A 20-year strategic framework for the renewal of St Marys Town Centre, formally endorsed by Penrith City Council on 3 March 2025. New planning controls came into effect on 6 February 2026 via the State Environmental Planning Policy Amendment (St Marys Town Centre) 2026 and amendments to the Penrith Local Environmental Plan 2010, followed by amendments to Chapter E15 of the Penrith Development Control Plan 2014 on 11 February 2026. The Master Plan facilitates around 9,307 new dwellings and 8,360 new jobs by 2041, with the population projected to grow from 3,500 to 25,500. It leverages the new Sydney Metro - Western Sydney Airport station and includes the multi-million-dollar St Marys Central Park (amalgamating Coachmans and Kokoda Parks), a new civic precinct with library and community hub, upgraded active transport links, public domain improvements, stormwater works and a 24-hour commercial core. A Section 7.12 Development Contributions Plan with a 4 percent levy will fund over 235 million dollars of supporting local infrastructure.
St Marys Station Upgrade and Metro Integration
A major transport interchange project integrating the existing T1 Western Line with the new Sydney Metro Western Sydney Airport line. Key features include a new underground metro station, a 55-metre-long pedestrian concourse and footbridge, a northern pedestrian plaza, and a multi-storey commuter car park with over 250 additional spaces. The project serves as a vital gateway for the Western Parkland City, providing seamless transfers between suburban rail, metro, and bus services.
M12 Motorway
16-kilometre east-west motorway connecting the M7 Motorway at Cecil Hills to The Northern Road at Luddenham, providing direct access to Western Sydney International Airport. Features a four-lane divided motorway with provision for up to six lanes, multiple bridges, interchanges, and a shared user path.
Richmond Road Upgrade - M7 to Townson Road
Major road infrastructure upgrade to duplicate Richmond Road between M7 Motorway and Townson Road, Marsden Park. Includes new flyover bridge from M7 Motorway Rooty Hill Road North off-ramp to Richmond Road northbound, replacing existing boardwalk with new concrete bridge over Bells Creek, maintaining dedicated bus lanes, intersection improvements, cycling infrastructure, and noise barriers to improve traffic flow and safety for the growing Marsden Park area.
St Marys Central Park
The St Marys Central Park project aims to transform St Marys into a vibrant and modern Town Centre by creating a new civic park that connects Coachmans Park and Kokoda Park. It features a large central lawn, entertainment area, childrens playspace with water play, trees, pathways, lighting, more shade, seating, revised playspace features, activation area near Queen Street, and retention of the LED screen. The park will attract residents and visitors for socializing, recreation, events, and stimulate the local economy.
Glenmore Park High School Performing Arts and Learning Centre
The new Performing Arts and Learning Centre at Glenmore Park High School is a state-of-the-art facility featuring a performance hall with seating capacity for over 400, a raised stage area with back-of-house holding rooms, change rooms, and stores, as well as two flexible learning spaces. It supports the school's creative and performing arts programs, enabling performances, assemblies, and community events as part of the NSW Government's education infrastructure initiatives.
Phillip Street Social Housing Development
Completed in 2022, this 5-storey Homes NSW development delivers 44 social housing apartments (23 one-bedroom and 21 two-bedroom) with landscaped communal areas, solar for common areas, a central rainwater tank and two lifts. Designed by McGregor Westlake Architecture and built by Growthbuilt, the building is about an 8-minute walk from St Marys Station.
Employment
Employment conditions in North St Marys face significant challenges, ranking among the bottom 10% of areas assessed nationally
North St Marys has a balanced workforce with white and blue collar employment. Manufacturing and industrial sectors are strongly represented, with an unemployment rate of 10.3% as of AreaSearch's aggregation of statistical area data. As of December 2025, 1,577 residents are employed while the unemployment rate is 6.2% higher than Greater Sydney's rate of 4.2%.
Workforce participation lags significantly at 53.4%, compared to Greater Sydney's 68.8%. According to Census responses, 19.4% of residents work from home. Employment is concentrated in health care & social assistance, retail trade, and construction. The area has a notably high concentration in transport, postal & warehousing employment at 2.1 times the regional average.
However, professional & technical employment is limited at 3.4%, compared to the regional average of 11.5%. Many residents commute elsewhere for work based on Census data. Between December 2024 and December 2025, the labour force decreased by 7.4% while employment declined by 6.1%, causing unemployment to fall by 1.3 percentage points in North St Marys. In contrast, Greater Sydney saw employment rise by 2.2%. According to Jobs and Skills Australia's national employment forecasts from May-25, national employment is projected to expand by 6.6% over five years and 13.7% over ten years. Applying these projections to North St Marys' employment mix suggests local employment should increase by 6.0% over five years and 12.6% over ten years.
Frequently Asked Questions - Employment
Income
Income metrics place the area in the bottom 10% of locations nationally according to AreaSearch analysis
North St Marys' suburb income level is below the national average according to latest ATO data aggregated by AreaSearch for financial year 2023. The median income among taxpayers in North St Marys is $43,352 and the average income stands at $46,929, compared to Greater Sydney's figures of $60,817 and $83,003 respectively. Based on Wage Price Index growth of 10.32% since financial year 2023, current estimates would be approximately $47,826 (median) and $51,772 (average) as of March 2026. Census data reveals household, family and personal incomes in North St Marys all fall between the 11th and 17th percentiles nationally. Income distribution shows 29.3% of the population (1,217 individuals) within the $800 - 1,499 income range, differing from surrounding region patterns where $1,500 - 2,999 dominates with 30.9%. Housing affordability pressures are severe, with only 77.5% of income remaining, ranking at the 12th percentile.
Frequently Asked Questions - Income
Housing
North St Marys is characterized by a predominantly suburban housing profile, with a higher proportion of rental properties than the broader region
In North St Marys, as per the latest Census, 96.3% of dwellings were houses with the remaining 3.7% being semi-detached, apartments, or other types. This compares to Sydney metro's 55.9% houses and 44.1% other dwellings. Home ownership in North St Marys stood at 21.9%, with mortgaged dwellings at 22.5% and rented ones at 55.6%. The median monthly mortgage repayment was $1,800, below Sydney metro's average of $2,427. Median weekly rent in North St Marys was $340, compared to Sydney metro's $470. Nationally, North St Marys' mortgage repayments were lower than the Australian average of $1,863 and rents were less than the national figure of $375.
Frequently Asked Questions - Housing
Household Composition
North St Marys features high concentrations of group households, with a fairly typical median household size
Family households account for 68.3% of all households, including 26.6% couples with children, 15.8% couples without children, and 23.9% single parent families. Non-family households constitute the remaining 31.7%, with lone person households at 26.9% and group households comprising 4.7% of the total. The median household size is 2.7 people, which aligns with the Greater Sydney average.
Frequently Asked Questions - Households
Local Schools & Education
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 12.8%, significantly lower than Greater Sydney's average of 38.0%. Bachelor degrees are the most common at 9.0%, followed by postgraduate qualifications (2.8%) and graduate diplomas (1.0%). Vocational credentials are prevalent, with 37.4% of residents aged 15+ holding them, including advanced diplomas (8.4%) and certificates (29.0%). Educational participation is high at 36.6%, with 14.2% in primary education, 10.3% in secondary education, and 3.7% pursuing tertiary education.
Educational participation is notably high, with 36.6% of residents currently enrolled in formal education. This includes 14.2% in primary education, 10.3% in secondary education, and 3.7% pursuing tertiary education.
Frequently Asked Questions - Education
Schools Detail
Nearby Services & Amenities
Transport
Transport servicing is high compared to other areas nationally based on assessment of service frequency, route connectivity and accessibility
North St Marys has 48 active public transport stops offering a mix of train and bus services. These are served by 11 routes, providing a total of 2,822 weekly passenger trips. The area's transport accessibility is rated excellent, with residents typically living 140 meters from the nearest stop. Primarily residential, most commuters travel outward. Cars remain the dominant mode at 83%, while train use stands at 8%. Vehicle ownership averages 1.0 per dwelling, below the regional average.
According to the 2021 Census, 19.4% of residents work from home, which may reflect COVID-19 conditions. Service frequency across all routes averages 403 trips per day, equating to approximately 58 weekly trips per individual stop.
Frequently Asked Questions - Transport
Transport Stops Detail
Health
Health performance in North St Marys is a key challenge with a range of health conditions having marked impacts on both younger and older age cohorts
North St Marys faces significant health challenges, as indicated by AreaSearch's assessment. Mortality rates and chronic condition prevalence are high, affecting both younger and older age groups. Private health cover is low, at approximately 46% of the total population (~1,894 people), compared to 59.9% in Greater Sydney and a national average of 55.7%.
The most prevalent medical conditions are asthma (10.0%) and mental health issues (8.9%), while 63.6% of residents report no medical ailments, compared to 74.6% in Greater Sydney. Working-age residents face notable health challenges due to elevated chronic condition rates. The area has 15.9% of residents aged 65 and over (660 people). Health outcomes among seniors are broadly in line with national rankings.
Frequently Asked Questions - Health
Cultural Diversity
The level of cultural diversity witnessed in North St Marys was found to be slightly above average when compared nationally for a number of language and cultural background related metrics
North St Marys had a higher cultural diversity than most local markets, with 24.8% of its population born overseas and 20.6% speaking a language other than English at home. Christianity was the main religion in North St Marys, comprising 54.6% of people, but Islam was overrepresented at 3.5%, compared to Greater Sydney's 6.8%. The top three ancestry groups were Australian (24.4%), English (23.8%), and Other (11.9%).
Notably, Samoan was overrepresented at 2.7% (vs regional 0.5%), Maltese at 2.1% (vs 1.0%), and Australian Aboriginal at 8.4% (vs 1.3%).
Frequently Asked Questions - Diversity
Age
North St Marys's population is younger than the national pattern
North St Mary's median age of 35 years stands slightly younger than Greater Sydney's 37 as well as somewhat younger than the national average of 38 years. The 5-14 age group shows strong representation at 14.2%, compared to Greater Sydney, whereas the 35-44 cohort is less prevalent at 12.5%. Between 2021 and present, the 15 to 24 age group has grown from 13.9% to 15.3% of the population. Conversely, the 45 to 54 cohort has declined from 11.9% to 11.1%. Population forecasts for North St Mary's in 2041 indicate substantial demographic changes. The 75-84 age cohort is projected to rise substantially, expanding by 164 people (75%) from 220 to 385. Meanwhile, the 0-4 cohort grows by a modest 7% (17 people).