8,898 ▲ +9.6%
Higher than 87% of suburb / locality areas.
- 2011: 8,115
- 2016: 8,464
- 2021: 8,898
The number of people who usually live in the area, counted on Census night.
Thornleigh · Suburb / Locality
Demographics & Identity in Thornleigh
Who lives here — how many people, how old they are, and how communities identify.
A population of 8,898 makes Thornleigh one of the largest areas of its kind. It is a family-friendly community where the proportion of children is much higher than in most similar places. While the typical resident is 40, the area has a lower share of seniors compared to most other regions.
8,898
▲ +9.6%
- 1–1: 689 areas
- 1–2: 0 areas
- 2–3: 119 areas
- 3–5: 108 areas
- 5–7: 243 areas
- 7–11: 241 areas
- 11–16: 514 areas
- 16–24: 579 areas
- 24–36: 898 areas
- 36–53: 1059 areas
- 53–79: 1168 areas
- 79–117: 1203 areas
- 117–174: 1171 areas
- 174–258: 1010 areas
- 258–384: 856 areas
- 384–571: 670 areas
- 571–850: 616 areas
- 850–1,263: 567 areas
- 1,263–1,879: 520 areas
- 1,879–2,794: 590 areas
- 2,794–4,154: 679 areas
- 4,154–6,177: 585 areas
- 6,177–9,186: 528 areas
- 9,186–13,659: 405 areas
- 13,659–20,311: 195 areas
- 20,311–30,202: 96 areas
- 30,202–44,910: 33 areas
- 44,910–66,781: 10 areas
All suburb / locality areas, 2021. The marker is Thornleigh — higher than 87% of areas.
| Thornleigh | 8,898 |
|---|---|
| 2120, NSW | 20,988 |
| New South Wales | 8,072,163 |
| Australia | 25,422,788 |
Population
How many people, and the typical age.
The typical resident is 40 years old, which is lower than most areas. This is slightly older than the New South Wales figure of 39 and the national figure of 38.
40 yrs ▲ +5.3%
Younger than 71% of suburb / locality areas.
- 2011: 38 yrs
- 2016: 39 yrs
- 2021: 40 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 20.9% of the population, which is much higher than most areas and a little above the national figure of 18.2%. In contrast, the 14.9% of people aged 65 and over is a little below the national figure of 17.2%.
14.9% ▲ +9.6%
Lower than 68% of suburb / locality areas.
- 2011: 13.6%
- 2016: 13.9%
- 2021: 14.9%
Share of the population aged 65 years and over.
20.9% ▼ -4.7%
Higher than 75% of suburb / locality areas.
- 2011: 22.0%
- 2016: 21.3%
- 2021: 20.9%
Share of the population aged under 15 years.
Age structure
View on map →Thornleigh splits fairly evenly between Older adults (45–64) (28%) and Young adults (25–44) (24%), with Children (0–14) at 21%.
Identity & relationships
First Nations identity and marital status.
People in de facto relationships make up 6.1% of the community, which is well below the national figure of 11.5%. Aboriginal and Torres Strait Islander people represent 0.6% of the population, which is a little below the national figure of 3.2%.
0.6% ▲ +44.8%
Lower than 64% of suburb / locality areas.
- 2011: 0.4%
- 2016: 0.5%
- 2021: 0.6%
Share of people who identify as Aboriginal and/or Torres Strait Islander.
6.1% ▲ +22.4%
Lower than 87% of suburb / locality areas.
- 2011: 5.0%
- 2016: 5.0%
- 2021: 6.1%
Share of people aged 15+ who are in a de facto marriage (registered marriages excluded).
Marital status
View on map →In Thornleigh, Married is the majority at 57%; Never married is next at 29%.
Age & sex structure
Sources
- Census of Population and Housing — Australian Bureau of Statistics, 2021 (CC BY 4.0).
More for Thornleigh
Cite this page
Australian Bureau of Statistics. (2021). Demographics & Identity in Thornleigh [Census of Population and Housing]. CensusAtlas, used under CC BY 4.0. https://censusatlas.au/region/sal/SAL13866/thornleigh/topic/demographics-identity