North St Marys (NSW)

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According to the evaluation of ABS population adjustments for the wider region and recent address validations conducted by Districts since the Census, the suburb of North St Marys has a calculated residency of approximately 4,156 as of May 2026. This represents an expansion of 33 people (0.8%) from the 2021 Census, which documented a population of 4,123 people. The adjustment is derived from a resident population of 4,133, estimated by Districts using the latest ABS ERP release (June 2025) along with 16 validated new addresses since the Census date. This population level yields a density of 1,302 persons per square kilometer, which exceeds the typical average for national sites evaluated by Districts. The primary driver of population growth in the locality was overseas migration, which accounted for roughly 67.0% of the overall population gains in recent times.

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The suburb of North St Marys has a diverse workforce across professional and industrial roles, with manufacturing and industrial sectors highly represented, and an unemployment rate of 10.5%, according to Districts' compilation of statistical area datasets. As of March 2026, 1,590 residents are employed, while the unemployment rate is 6.4% higher than the Greater Sydney rate of 4.1%, indicating potential for growth, and participation in the labor force is low (53.9% relative to 69.1% in Greater Sydney). Census answers indicate that a moderate 19.4% of residents worked from their homes, although the influence of COVID-19 lockdowns should be kept in mind.

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The suburb of North St Marys's income level is below the national average according to the latest ATO data aggregated by Districts for financial year 2023. The suburb of North St Marys's median income among taxpayers is $43,352 and the average income stands at $46,929, which compares to figures for Greater Sydney's 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. Looking at income distribution, 29.3% of the population (1,217 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, with only 77.5% of income remaining, ranking at the 12th percentile.

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Residential property types in the suburb of North St Marys, measured in the latest Census, consisted of 96.3% houses and 3.7% other housing formats (semi-detached, units, and alternative dwellings), compared to the Sydney metro ratio of 55.9% houses and 44.1% other housing types. Additionally, home ownership rates in the suburb of North St Marys were lower than the Sydney metro average, recorded at 21.9%, with the remaining properties being mortgaged (22.5%) or rented (55.6%). The median monthly home loan payment in the locality was significantly lower than the Sydney metro average at $1,800, while the median weekly rental cost was recorded at $340, in comparison to Sydney metro figures of $2,427 and $470. On a national level, mortgage costs in the suburb of North St Marys are lower than the Australian average of $1,863, and rents are below the national median of $375.

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Families make up the majority of households at 68.3%, consisting of 26.6% couples with children, 15.8% couples without children, and 23.9% single parent households. The remaining 31.7% are non-family households, with single person dwellings at 26.9% and group living situations representing 4.7% of the total. The median household occupancy of 2.7 people matches the average for Greater Sydney.

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The region presents educational hurdles, with university qualification levels (12.8% of residents) sitting significantly lower than the Greater Sydney average of 38.0%. This stands as both an obstacle and a chance for focused educational campaigns. Bachelor degrees are the most common at 9.0%, followed by postgraduate degrees (2.8%) and graduate diplomas (1.0%). Practical and vocational skills are prominent, with 37.4% of residents aged 15+ holding trade credentials, consisting of advanced diplomas (8.4%) and certificates (29.0%).

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Public transport data lists 48 active transit stops in the suburb of North St Marys, including both rail and bus facilities. These locations are served by 11 separate routes, which combine to support 2,822 weekly passenger journeys. Transit accessibility is classified as excellent, with residents generally living within 140 meters of a stop. Given the residential nature of the suburb, most workers travel out of the area, with private cars remaining the primary option at 83% and rail usage at 8%. Car ownership averages 1.0 per household, sitting lower than the regional average. Roughly 19.4% of workers perform their jobs from home (2021 Census; potentially influenced by COVID-19 rules).

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Significant health issues are apparent throughout the suburb of North St Marys, based on Districts' evaluation of mortality statistics and the prevalence of chronic illnesses, which affect both younger and older cohorts, combined with an exceptionally low rate of private health insurance, held by approximately 46% of the population (~1,894 people). This stands in contrast to the 59.9% coverage seen in Greater Sydney and the national average of 55.7%.

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The suburb of North St Marys displays greater cultural variation than most local markets, with 24.8% of residents born in other countries and 20.6% speaking a non-English language at home. Christianity is the dominant religion, practiced by 54.6% of the local population. However, the most pronounced disproportion is in Islam, which represents 3.5% of the population, compared to 6.8% in Greater Sydney.

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The median age in the suburb of North St Marys is 35 years, making it slightly younger than the Greater Sydney median of 37 and the national average of 38 years. Children aged 5 - 14 show strong numbers at 14.2% relative to Greater Sydney, while the 35 - 44 bracket is less common at 12.5%. Since 2021, the 15 to 24 age bracket has risen from 13.9% to 15.3% of the population, whereas the 45 to 54 cohort has shrunk from 11.9% to 11.1%. Demographic projections for 2041 indicate major shifting trends for the suburb of North St Marys, with the 75 to 84 age cohort expected to grow substantially by 164 people (75%) from 220 to 385, while the 0 to 4 group is forecast to rise by a minor 7% (17 people).

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North St Marys currently has an estimated 253 children under 5 years old, comprising approximately 182 children aged 0-2 and 122 children aged 3-4. This cohort declined by an estimated 8% since the previous census. though population forecasts indicate future growth, with an anticipated increase of 7% by 2041 (to approximately 271 children). Meanwhile the 5-12 cohort currently amounts to 433. Birth rates in the area have averaged 17.8 per 1,000 residents over the latest two-year period, a high rate (among the top 20% of areas assessed nationally).