56,790 ▲ +9.1%
Lower than 54% of sub-region (sa3) areas.
- 2011: 52,065
- 2016: 53,993
- 2021: 56,790
The number of people who usually live in the area, counted on Census night.
St Marys · Sub-region (SA3)
Demographics & Identity in St Marys
Who lives here — how many people, how old they are, and how communities identify.
Married people make up the largest group at 44% in St Marys, where the typical resident is 35. This is noticeably younger than the national figure, and the area has grown by 9.1% since 2011 to reach a population of 56,790.
56,790
▲ +9.1%
- 1–2: 3 areas
- 2–2: 0 areas
- 2–4: 0 areas
- 4–6: 0 areas
- 6–9: 2 areas
- 9–15: 2 areas
- 15–23: 1 area
- 23–37: 0 areas
- 37–57: 1 area
- 57–90: 0 areas
- 90–141: 1 area
- 141–221: 1 area
- 221–347: 1 area
- 347–545: 2 areas
- 545–854: 3 areas
- 854–1,340: 0 areas
- 1,340–2,101: 3 areas
- 2,101–3,296: 1 area
- 3,296–5,169: 2 areas
- 5,169–8,107: 3 areas
- 8,107–12,714: 7 areas
- 12,714–19,940: 16 areas
- 19,940–31,273: 30 areas
- 31,273–49,048: 61 areas
- 49,048–76,924: 90 areas
- 76,924–120,643: 70 areas
- 120,643–189,211: 46 areas
- 189,211–296,748: 12 areas
All sub-region (sa3) areas, 2021. The marker is St Marys — lower than 54% of areas.
| St Marys | 56,790 |
|---|---|
| Greater Sydney | 5,231,147 |
| New South Wales | 8,072,163 |
| Australia | 25,422,788 |
Population
How many people, and the typical age.
The typical resident is 35, which is noticeably younger than the national figure of 38. This age has increased slightly since 2011, when the typical resident was 33.
35 yrs ▲ +6.1%
Younger than 86% of sub-region (sa3) areas.
- 2011: 33 yrs
- 2016: 34 yrs
- 2021: 35 yrs
Half the population is older than this age, and half younger.
Age profile
How the population splits across age groups.
Children under 15 make up 21.2% of the population, which is well above the national figure of 18.2%. Meanwhile, seniors aged 65 and over are much less common here at 12.8% compared to 17.2% across Australia.
12.8% ▲ +45.3%
Lower than 81% of sub-region (sa3) areas.
- 2011: 8.8%
- 2016: 10.8%
- 2021: 12.8%
Share of the population aged 65 years and over.
21.2% ▼ -1.3%
Higher than 85% of sub-region (sa3) areas.
- 2011: 21.5%
- 2016: 20.6%
- 2021: 21.2%
Share of the population aged under 15 years.
Age structure
View on map →St Marys splits fairly evenly between Young adults (25–44) (29%) and Older adults (45–64) (24%), with Children (0–14) at 21%.
Identity & relationships
First Nations identity and marital status.
Aboriginal and Torres Strait Islander people make up 4.7% of the population, which is a little above the national figure. Around 10.4% of residents are in a de facto relationship, a rate much lower than most similar areas.
4.7% ▲ +48.5%
Higher than 71% of sub-region (sa3) areas.
- 2011: 3.2%
- 2016: 3.9%
- 2021: 4.7%
Share of people who identify as Aboriginal and/or Torres Strait Islander.
10.4% ▲ +24.0%
Lower than 76% of sub-region (sa3) areas.
- 2011: 8.4%
- 2016: 10.1%
- 2021: 10.4%
Share of people aged 15+ who are in a de facto marriage (registered marriages excluded).
Marital status
View on map →In St Marys, the largest group is Married at 44%, followed by Never married (39%) and Divorced (8%).
Age & sex structure
Sources
- Census of Population and Housing — Australian Bureau of Statistics, 2021 (CC BY 4.0).
More for St Marys
Cite this page
Australian Bureau of Statistics. (2021). Demographics & Identity in St Marys [Census of Population and Housing]. CensusAtlas, used under CC BY 4.0. https://censusatlas.au/region/sa3/12405/st-marys/topic/demographics-identity