Thornlea · Suburb / Locality

Demographics & Identity in Thornlea

Who lives here — how many people, how old they are, and how communities identify.

A typical resident in Thornlea is just 37 years old, making this area noticeably younger than most others in the region. This sparsely populated place has a small community of 46 people, with a population profile that sits well below state and national averages for older adults.

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📍 Thornlea, Suburb / Locality

Where Thornlea sits — Total population

46
  • 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 Thornlea — lower than 74% of areas.

Total population compared with the state and national average
Thornlea46
5280, SA 7,561
South Australia 1,781,516
Australia 25,422,788

Population

How many people, and the typical age.

The typical age of 37 is noticeably younger than the South Australian figure of 41 and a little younger than the national typical age of 38.

46

Lower than 74% of suburb / locality areas.

  • 2016: 40
  • 2021: 46

The number of people who usually live in the area, counted on Census night.

37 yrs

Younger than 80% of suburb / locality areas.

  • 2016: 47 yrs
  • 2021: 37 yrs

Half the population is older than this age, and half younger.

Age profile

How the population splits across age groups.

Seniors aged 65 and over make up only 6.5% of the population, which is far below the 20% seen across South Australia and the 17.2% national figure.

6.5%

Lower than 90% of suburb / locality areas.

  • 2016: 25.0%
  • 2021: 6.5%

Share of the population aged 65 years and over.

17.4%

Higher than 52% of suburb / locality areas.

  • 2016: 22.5%
  • 2021: 17.4%

Share of the population aged under 15 years.

Age structure

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In Thornlea, the largest group is Older adults (45–64) at 32%, followed by Children (0–14) (24%) and Young adults (25–44) (24%).

Identity & relationships

First Nations identity and marital status.

De facto relationships are much more common here than in most areas, at 20%, which is well above the 11.5% national figure. No residents identify as Aboriginal or Torres Strait Islander.

20.0%

Higher than 88% of suburb / locality areas.

  • 2016: 17.9%
  • 2021: 20.0%

Share of people aged 15+ who are in a de facto marriage (registered marriages excluded).

Marital status

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Thornlea splits fairly evenly between Married (45%) and Never married (42%), with Divorced at 13%.

Age & sex structure

  • 85+: 85+: 0 males; 85+: 0 females
  • 80–84: 80–84: 0 males; 80–84: 0 females
  • 75–79: 75–79: 0 males; 75–79: 0 females
  • 70–74: 70–74: 0 males; 70–74: 0 females
  • 65–69: 65–69: 0 males; 65–69: 0 females
  • 60–64: 60–64: 4 males; 60–64: 0 females
  • 55–59: 55–59: 0 males; 55–59: 0 females
  • 50–54: 50–54: 6 males; 50–54: 3 females
  • 45–49: 45–49: 4 males; 45–49: 3 females
  • 40–44: 40–44: 3 males; 40–44: 3 females
  • 35–39: 35–39: 0 males; 35–39: 0 females
  • 30–34: 30–34: 0 males; 30–34: 0 females
  • 25–29: 25–29: 0 males; 25–29: 0 females
  • 20–24: 20–24: 0 males; 20–24: 0 females
  • 15–19: 15–19: 0 males; 15–19: 0 females
  • 10–14: 10–14: 0 males; 10–14: 0 females
  • 5–9: 5–9: 0 males; 5–9: 3 females
  • 0–4: 0–4: 5 males; 0–4: 4 females

Sources

  • Census of Population and Housing — Australian Bureau of Statistics, 2021 (CC BY 4.0).

More for Thornlea

Cite this page

Australian Bureau of Statistics. (2021). Demographics & Identity in Thornlea [Census of Population and Housing]. CensusAtlas, used under CC BY 4.0. https://censusatlas.au/region/sal/SAL41448/thornlea/topic/demographics-identity