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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 2011 was 70 to 74 year olds, increasing by 17,257 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 | 2011 | Change | ||||
| Five year age groups (years) | Number | % | Regional WA % | Number | % | Regional WA % | 2011 to 2021 |
| 0 to 4 | 48,325 | 5.5 | 5.3 | 49,029 | 6.3 | 6.4 | -704 |
| 5 to 9 | 53,283 | 6.1 | 6.1 | 47,710 | 6.1 | 6.2 | +5,573 |
| 10 to 14 | 53,855 | 6.2 | 5.9 | 49,672 | 6.4 | 6.2 | +4,183 |
| 15 to 19 | 51,038 | 5.8 | 4.9 | 52,833 | 6.8 | 5.4 | -1,795 |
| 20 to 24 | 55,843 | 6.4 | 4.8 | 53,583 | 6.9 | 6.0 | +2,260 |
| 25 to 29 | 59,091 | 6.8 | 6.3 | 52,181 | 6.7 | 7.5 | +6,910 |
| 30 to 34 | 58,236 | 6.7 | 7.1 | 48,663 | 6.2 | 7.1 | +9,573 |
| 35 to 39 | 58,369 | 6.7 | 7.3 | 51,256 | 6.6 | 7.6 | +7,113 |
| 40 to 44 | 53,200 | 6.1 | 6.8 | 55,379 | 7.1 | 8.0 | -2,179 |
| 45 to 49 | 54,143 | 6.2 | 7.0 | 55,611 | 7.1 | 7.9 | -1,468 |
| 50 to 54 | 56,476 | 6.5 | 7.4 | 54,743 | 7.0 | 7.7 | +1,733 |
| 55 to 59 | 55,752 | 6.4 | 7.2 | 49,367 | 6.3 | 6.7 | +6,385 |
| 60 to 64 | 54,230 | 6.2 | 6.9 | 47,152 | 6.0 | 6.1 | +7,078 |
| 65 to 69 | 48,531 | 5.6 | 5.9 | 35,314 | 4.5 | 4.4 | +13,217 |
| 70 to 74 | 44,312 | 5.1 | 5.0 | 27,055 | 3.5 | 3.0 | +17,257 |
| 75 to 79 | 31,107 | 3.6 | 3.0 | 21,039 | 2.7 | 1.9 | +10,068 |
| 80 to 84 | 20,230 | 2.3 | 1.8 | 16,698 | 2.1 | 1.2 | +3,532 |
| 85 and over | 18,169 | 2.1 | 1.2 | 12,978 | 1.7 | 0.8 | +5,191 |
| Total population | 874,190 | 100.0 | 100.0 | 780,263 | 100.0 | 100.0 | +93,927 |
Dominant groups
Analysis of the male five year age groups of South Australia in 2021 compared to Regional WA shows that there was a similar 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 17.3% and 16.9% respectively for Regional WA.
The major differences between the male age structure of South Australia and Regional WA were:
- A larger percentage of males aged 20 to 24 (6.4% compared to 4.8%)
- A larger percentage of males aged 15 to 19 (5.8% compared to 4.9%)
- A smaller percentage of males aged 50 to 54 (6.5% compared to 7.4%)
- A smaller percentage of males aged 45 to 49 (6.2% compared to 7.0%)
Emerging groups
From 2011 to 2021, South Australia's male population increased by 93,927 people (12.0%). This represents an average annual population change of 1.14% per year over the period.
The largest changes in male age structure in this area between 2011 and 2021 were in the age groups:
- 70 to 74 (+17,257 males)
- 65 to 69 (+13,217 males)
- 75 to 79 (+10,068 males)
- 30 to 34 (+9,573 males)
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