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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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Sales Detail
Population
Population growth drivers in North St Marys are above average based on AreaSearch's ranking of recent, and medium to long-term trends
As of November 2025, the estimated population for the North St Marys statistical area (Lv2) is around 4,607. This figure represents an increase of 484 people since the 2021 Census, which reported a population of 4,123. The change was inferred from AreaSearch's resident population estimate of 4,469 in June 2024, based on examination of the latest ERP data release by the ABS and an additional 15 validated new addresses since the Census date. The population density ratio for North St Marys (SA2) is 1,444 persons per square kilometer, above the average seen across national locations assessed by AreaSearch. The area's population growth of 11.7% since the 2021 census exceeded both the SA3 area (6.3%) and the SA4 region, marking it as a growth leader in the region. Overseas migration contributed approximately 67.0% of overall population gains during recent periods for North St Marys (SA2).
AreaSearch is adopting 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. Demographic trends forecast a significant population increase for North St Marys (SA2) in the top quartile of national statistical areas. Based on aggregated SA2-level projections, the area is expected to grow by 1,204 persons by 2041, reflecting an increase of 22.1% over the 17 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
Based on AreaSearch analysis of ABS building approval numbers, allocated from statistical area data, North St Marys has averaged around 38 new dwelling approvals each year over the past five financial years. This totals an estimated 192 homes between FY-21 and FY-25. So far in FY-26, 6 approvals have been recorded. On average, 1.6 new residents arrive per new home annually over the past five financial years, indicating a balanced supply and demand creating stable market conditions. However, this has intensified to 9.2 people per dwelling over the past two financial years, suggesting growing popularity and potential undersupply.
New homes are being built at an average expected construction cost value of $350,000. There have been $33.0 million in commercial approvals this financial year, indicating strong commercial development momentum compared to Greater Sydney, where North St Marys has 96.0% more construction activity per person. New development consists of 19.0% detached houses and 81.0% townhouses or apartments, offering affordable entry pathways for downsizers, investors, and first-time purchasers. This represents a notable shift from the area's existing housing composition, which is currently 96.0% houses. The location has approximately 347 people per dwelling approval, reflecting an established area with a population forecast to gain 1,018 residents through to 2041 based on the latest AreaSearch quarterly estimate. At current development rates, new housing supply should comfortably meet demand, providing good conditions for buyers and potentially supporting growth beyond current population projections.
Population forecasts indicate North St Marys will gain 1,018 residents through to 2041 (from the latest AreaSearch quarterly estimate). At current development rates, new housing supply should comfortably meet demand, providing good conditions for buyers and potentially supporting growth beyond current population projections.
Frequently Asked Questions - Development
Infrastructure
North St Marys has very high levels of nearby infrastructure activity, ranking in the top 10% nationally
Changes to local infrastructure significantly influence an area's performance. AreaSearch has identified ten projects likely impacting the area. Notable ones are: St Marys Station Upgrade and Metro Integration, Western Sydney Aerotropolis Infrastructure and Development, St Marys Central Park, and St Marys Place Strategy. Below is a list of those most relevant.
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INFRASTRUCTURE SEARCH
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Frequently Asked Questions - Infrastructure
Western Sydney Aerotropolis Infrastructure and Development
A massive enabling infrastructure program for the 11,200-hectare Western Sydney Aerotropolis. Key 2026 updates include the finalization of the M12 Motorway and Sydney Metro - Western Sydney Airport line to coincide with the airport's opening. Significant works are underway on the Upper South Creek Advanced Water Recycling Centre, which is entering commissioning phases in early 2026. The $1 billion Fifteenth Avenue upgrade has progressed into early safety works with major construction slated for 2027. The project also encompasses major electricity substations and a regional stormwater network to support high-tech industries, agribusiness, and over 100,000 future jobs.
St Marys Place Strategy
A 20-year strategic framework for the renewal of St Marys town centre, formally adopted by Penrith City Council in March 2025 and endorsed by the NSW Government in February 2026. The strategy facilitates the delivery of approximately 11,500 new dwellings and 8,000 new jobs by 2041, leveraging the Sydney Metro - Western Sydney Airport station. Key infrastructure includes the $16.3 million St Marys Central Park (amalgamating Coachmans and Kokoda Parks), a new civic precinct with a library and community hub, and upgraded active transport links to support a thriving 24-hour economy.
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 representation across white and blue collar jobs. Manufacturing and industrial sectors are prominent, with an unemployment rate of 9.5% as per AreaSearch's statistical area data aggregation.
As of September 2025, 1,806 residents are employed while the unemployment rate is 5.3% higher than Greater Sydney's rate of 4.2%. Workforce participation lags at 44.3%, compared to Greater Sydney's 60.0%. Employment is concentrated in health care & social assistance, retail trade, and construction. Notably, transport, postal & warehousing has employment levels at 2.1 times the regional average.
However, professional & technical services have limited presence with only 3.4% employment compared to the regional 11.5%. Many residents commute elsewhere for work based on Census working population counts. Between September 2024 and September 2025, the labour force decreased by 3.9%, while employment declined by 1.1%, causing unemployment to fall by 2.5 percentage points in North St Marys. In contrast, Greater Sydney saw employment rise by 2.1% and a labour force growth of 2.4%, with unemployment rising by 0.2 percentage points during the same period. State-level data from NSW as of 25-Nov shows employment contracted by 0.03%, losing 2,260 jobs, with an unemployment rate of 3.9%. Nationally, the unemployment rate is 4.3%. Jobs and Skills Australia's national employment forecasts from May-25 suggest overall employment growth of 6.6% over five years and 13.7% over ten years. Applying these projections to North St Marys' employment mix indicates local employment should increase by 6.0% over five years and 12.6% over ten years, based on a simple weighting extrapolation for illustrative purposes.
Frequently Asked Questions - Employment
Income
Income metrics place the area in the bottom 10% of locations nationally according to AreaSearch analysis
The suburb of North St Marys's income level is below the national average according to the 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. This compares to figures for Greater Sydney's median income of $60,817 and average income of $83,003. Based on Wage Price Index growth of 8.86% since financial year 2023, current estimates would be approximately $47,193 (median) and $51,087 (average) as of September 2025. Census data reveals household, family and personal incomes in North St Marys all fall between the 11th and 17th percentiles nationally. Looking at income distribution, 29.3% of the population (1,349 individuals) fall within the $800 - 1,499 income range, differing from patterns across the surrounding region where $1,500 - 2,999 dominates with 30.9%. Housing affordability pressures are severe in North St Marys, with only 77.5% of income remaining after housing costs, ranking at the 12th percentile nationally.
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
North St Marys' dwelling structure, as per the latest Census, consisted of 96.3% houses and 3.7% other dwellings (semi-detached, apartments, 'other' dwellings), compared to Sydney metro's 81.7% houses and 18.2% other dwellings. Home ownership in North St Marys was 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 $2,000. The median weekly rent in North St Marys was $340, compared to Sydney metro's $390. 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 lower-than-average 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%. The median household size is 2.7 people, which is smaller than the Greater Sydney average of 2.8.
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. Advanced diplomas account for 8.4% and certificates for 29.0%.
Educational participation is high at 36.6%, including 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 46 active public transport stops offering a mix of train and bus services. These stops are served by 11 individual routes that collectively provide 2,822 weekly passenger trips. The accessibility of these services is rated excellent, with residents typically located 140 meters from the nearest stop.
On average, there are 403 trips per day across all routes, which equates to approximately 61 weekly trips per individual stop.
Frequently Asked Questions - Transport
Transport Stops Detail
Health
Health performance in North St Marys is well below average with considerably higher than average prevalence of common health conditions and to an even higher degree among older age cohorts
North St Marys faces significant health challenges, with a notably higher prevalence of common health conditions compared to average. This is particularly pronounced among older age groups. The rate of private health cover in North St Marys is extremely low at approximately 46% (~2,099 people), compared to Greater Sydney's 50.8% and the national average of 55.7%.
Asthma and mental health issues are the most common medical conditions, affecting 10.0% and 8.9% of residents respectively. However, 63.6% of residents claim to be completely clear of medical ailments, compared to Greater Sydney's 69.7%. North St Marys has a higher proportion of seniors aged 65 and over at 16.6% (764 people), compared to Greater Sydney's 14.3%. Health outcomes among seniors require more attention than the broader population.
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 compared to 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 predominant religion in North St Marys, comprising 54.6% of people. However, Islam showed significant overrepresentation, making up 3.5% compared to Greater Sydney's 6.2%.
In terms of ancestry, Australians were the largest group at 24.4%, followed by English at 23.8%, and Other at 11.9%. Notably, Samoan (2.7%) and Maltese (2.1%) groups were overrepresented compared to regional averages of 2.1% and 2.6% respectively. Additionally, Australian Aboriginals made up 8.4% of North St Marys population, higher than Greater Sydney's 3.5%.
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 and somewhat younger than the national average of 38 years. The 5-14 age group is strongly represented at 14.4%, compared to Greater Sydney, while the 35-44 cohort is less prevalent at 11.9%. Between 2021 and present, the 15-24 age group has grown from 13.9% to 15.1% of the population. Conversely, the 0-4 cohort has declined from 6.7% to 6.0%. Population forecasts for North St Mary's indicate substantial demographic changes by 2041. The 75-84 age cohort is projected to rise substantially, expanding by 199 people (79%) from 253 to 453. Meanwhile, the 35-44 cohort is projected to grow by a modest 0% (1 person).