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LEARN MORE ABOUT .idIn 2021, the largest age group in South Australia was 25 to 29 year olds. The group that changed the most since 2016 was 70 to 74 year olds, increasing by 10,718 people.
The Age Structure of South Australia provides key insights into the level of demand for age based services and facilities such as child care. It is also an indicator of South Australia's residential role and function and how it is likely to change in the future.
Five year age groups present a classic age profile of the population. Each age group covers exactly five years, which enables direct comparison between each group.
To get a more complete picture South Australia's Age Structure should be viewed in conjunction with Household Types and Dwelling Types.
Q:
Derived from the Census question:
'What is the person's date of birth or age?'
| Age structure - Five year age groups | |||||||
|---|---|---|---|---|---|---|---|
| South Australia - Total males (Enumerated) | 2021 | 2016 | Change | ||||
| Five year age groups (years) | Number | % | Greater Sydney % | Number | % | Greater Sydney % | 2016 to 2021 |
| 0 to 4 | 48,325 | 5.5 | 6.2 | 49,747 | 6.1 | 6.7 | -1,422 |
| 5 to 9 | 53,283 | 6.1 | 6.5 | 51,285 | 6.3 | 6.7 | +1,998 |
| 10 to 14 | 53,855 | 6.2 | 6.4 | 48,936 | 6.0 | 6.1 | +4,919 |
| 15 to 19 | 51,038 | 5.8 | 5.9 | 51,315 | 6.3 | 6.2 | -277 |
| 20 to 24 | 55,843 | 6.4 | 6.8 | 54,963 | 6.7 | 7.3 | +880 |
| 25 to 29 | 59,091 | 6.8 | 7.6 | 53,095 | 6.5 | 7.9 | +5,996 |
| 30 to 34 | 58,236 | 6.7 | 7.9 | 54,366 | 6.7 | 8.2 | +3,870 |
| 35 to 39 | 58,369 | 6.7 | 7.9 | 50,739 | 6.2 | 7.5 | +7,630 |
| 40 to 44 | 53,200 | 6.1 | 7.0 | 52,636 | 6.4 | 7.1 | +564 |
| 45 to 49 | 54,143 | 6.2 | 6.6 | 55,676 | 6.8 | 6.6 | -1,533 |
| 50 to 54 | 56,476 | 6.5 | 6.1 | 55,423 | 6.8 | 6.4 | +1,053 |
| 55 to 59 | 55,752 | 6.4 | 5.8 | 53,969 | 6.6 | 5.8 | +1,783 |
| 60 to 64 | 54,230 | 6.2 | 5.1 | 48,723 | 6.0 | 4.9 | +5,507 |
| 65 to 69 | 48,531 | 5.6 | 4.3 | 45,260 | 5.5 | 4.3 | +3,271 |
| 70 to 74 | 44,312 | 5.1 | 3.8 | 33,594 | 4.1 | 3.2 | +10,718 |
| 75 to 79 | 31,107 | 3.6 | 2.7 | 24,313 | 3.0 | 2.3 | +6,794 |
| 80 to 84 | 20,230 | 2.3 | 1.8 | 17,112 | 2.1 | 1.6 | +3,118 |
| 85 and over | 18,169 | 2.1 | 1.6 | 16,224 | 2.0 | 1.5 | +1,945 |
| Total population | 874,190 | 100.0 | 100.0 | 817,376 | 100.0 | 100.0 | +56,814 |
Dominant groups
Analysis of the male five year age groups of South Australia in 2021 compared to Greater Sydney shows that there was a lower proportion of males in the younger age groups (under 15) and a higher proportion of males in the older age groups (65+).
Overall, 17.8% of the male population was aged between 0 and 15, and 18.6% were aged 65 years and over, compared with 19.2% and 14.1% respectively for Greater Sydney.
The major differences between the male age structure of South Australia and Greater Sydney were:
- A larger percentage of males aged 70 to 74 (5.1% compared to 3.8%)
- A larger percentage of males aged 65 to 69 (5.6% compared to 4.3%)
- A smaller percentage of males aged 30 to 34 (6.7% compared to 7.9%)
- A smaller percentage of males aged 35 to 39 (6.7% compared to 7.9%)
Emerging groups
From 2016 to 2021, South Australia's male population increased by 56,814 people (7.0%). This represents an average annual population change of 1.35% per year over the period.
The largest changes in male age structure in this area between 2016 and 2021 were in the age groups:
- 70 to 74 (+10,718 males)
- 35 to 39 (+7,630 males)
- 75 to 79 (+6,794 males)
- 25 to 29 (+5,996 males)
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