Appendix A: Data Tables

Median age by capital city (Graph 1)

Capital city

Median age of residents in this city

Darwin

34.5

Canberra

35.4

Brisbane

36.5

Melbourne

36.8

Sydney

37.1

Median age for all Australian capital cities

37.1

Perth

37.6

Hobart

38.6

Adelaide

39.3

Source: ABS 2021 Census

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South Australia’s Ageing Population 1921 to 2041 (Graph 2)

Year

Population

People 50+

People 50+ as %

People 65+

People 65+ as %

People 80+

People 80+ as %

1921

493,900

81,800

16.5

25,200

5.1

3,200

0.6

1947

642,600

159,300

24.8

56,000

8.7

8,300

1.3

1961

969,300

211,100

21.8

84,900

8.8

12,500

1.3

1981

1,285,000

329,800

25.7

134,900

10.5

24,500

1.9

2001

1,458,900

454,400

31.1

211,400

14.5

55,500

3.8

2021

1,781,500

698,400

39.2

356,300

20.0

93,000

5.2

2041
(projected)

2,174,500

884,800

40.7

514,400

23.7

192,800

8.9

Source: ABS Census (1921 to 2021).

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Data Table: Population growth 2021 to 2041 by age group

Age

Population 2021

Population 2041

Change from 2021 to 2041: Number

Change from 2021 to 2041: %

50–64

343,600

370,400

26,800

7.8

65–79

260,400

321,600

61,200

23.5

80+

92,00

192,700

100,700

109.5

Figures rounded to closest 100. 2041 is a mid-range projection.

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Regional population projections (Graph 3)

Overall, the population is expected to grow 20 per cent from 2021 to 2041 but major variances include:

  • A reduction in the number of people aged 50 to 64 in country areas of around 6 per cent
  • An increase in the number of people aged 80 and over in specific metropolitan and country areas.

Area

Increase in people aged 80 to 84 in %

Increase in people aged 85 to 89 in %

Increase in people aged 90+ in %

Adelaide southern suburbs

118

183

191

Adelaide Hills

156

226

318

Fleurieu Peninsula

118

202

245

Kangaroo Island

186

350

324

Whyalla

No data

No data

318

Source: Plan SA (plan.sa.gov.au)

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Page last updated 10 February 2026