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LEARN MORE ABOUT .idIn 2021, the largest age group in Cobblebank was 30 to 34 year olds. The group that changed the most since 2011 was 30 to 34 year olds, increasing by 558 people.
The Age Structure of Cobblebank provides key insights into the level of demand for age based services and facilities such as child care. It is also an indicator of Cobblebank'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 Cobblebank'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 | |||||||
|---|---|---|---|---|---|---|---|
| Cobblebank - Total persons (Usual residence) | 2021 | 2011 | Change | ||||
| Five year age groups (years) | Number | % | Truganina % | Number | % | Truganina % | 2011 to 2021 |
| 0 to 4 | 499 | 13.9 | 11.7 | 9 | 8.9 | 4.4 | +489 |
| 5 to 9 | 413 | 11.5 | 8.3 | 8 | 7.9 | 2.9 | +404 |
| 10 to 14 | 241 | 6.7 | 4.2 | 5 | 5.3 | 8.3 | +235 |
| 15 to 19 | 173 | 4.8 | 2.6 | 10 | 9.4 | 7.1 | +163 |
| 20 to 24 | 198 | 5.5 | 7.7 | 6 | 6.1 | 4.3 | +191 |
| 25 to 29 | 341 | 9.5 | 15.2 | 4 | 3.8 | 5.6 | +337 |
| 30 to 34 | 561 | 15.6 | 15.0 | 3 | 2.8 | 7.9 | +558 |
| 35 to 39 | 467 | 13.0 | 13.6 | 10 | 9.9 | 5.3 | +456 |
| 40 to 44 | 253 | 7.0 | 7.0 | 15 | 14.5 | 8.0 | +237 |
| 45 to 49 | 140 | 3.9 | 3.4 | 12 | 11.2 | 5.8 | +128 |
| 50 to 54 | 92 | 2.6 | 3.5 | 5 | 4.8 | 6.2 | +87 |
| 55 to 59 | 75 | 2.1 | 1.6 | 10 | 9.6 | 10.4 | +64 |
| 60 to 64 | 59 | 1.6 | 1.5 | 3 | 3.3 | 6.9 | +55 |
| 65 to 69 | 50 | 1.4 | 2.3 | 2 | 2.5 | 9.1 | +47 |
| 70 to 74 | 22 | 0.6 | 1.2 | 0 | -- | 1.6 | +22 |
| 75 to 79 | 7 | 0.2 | 0.7 | 0 | -- | 2.8 | +7 |
| 80 to 84 | 4 | 0.1 | 0.2 | 0 | -- | 1.9 | +4 |
| 85 and over | 4 | 0.1 | 0.2 | 0 | -- | 1.6 | +4 |
| Total population | 3,599 | 100.0 | 100.0 | 110 | 100.0 | 100.0 | +3,489 |
Dominant groups
Analysis of the five year age groups of Cobblebank in 2021 compared to Truganina shows that there was a higher proportion of people in the younger age groups (under 15) and a lower proportion of people in the older age groups (65+).
Overall, 32.0% of the population was aged between 0 and 15, and 2.4% were aged 65 years and over, compared with 24.3% and 4.6% respectively for Truganina.
The major differences between the age structure of Cobblebank and Truganina were:
- A larger percentage of persons aged 5 to 9 (11.5% compared to 8.3%)
- A larger percentage of persons aged 10 to 14 (6.7% compared to 4.2%)
- A smaller percentage of persons aged 25 to 29 (9.5% compared to 15.2%)
- A smaller percentage of persons aged 20 to 24 (5.5% compared to 7.7%)
Emerging groups
From 2011 to 2021, Cobblebank's population increased by 3,489 people (3171.8%). This represents an average annual population change of 41.74% per year over the period.
The largest changes in age structure in this area between 2011 and 2021 were in the age groups:
- 30 to 34 (+558 persons)
- 0 to 4 (+489 persons)
- 35 to 39 (+456 persons)
- 5 to 9 (+404 persons)
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